gtk/auto/

tree_view.rs

// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use crate::{
    Adjustment, Align, Buildable, CellRenderer, Container, Entry, MovementStep, ResizeMode,
    Scrollable, ScrollablePolicy, Tooltip, TreeIter, TreeModel, TreePath, TreeSelection,
    TreeViewColumn, TreeViewDropPosition, TreeViewGridLines, Widget,
};
use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::{boxed::Box as Box_, fmt, mem, mem::transmute, ptr};

glib::wrapper! {
    /// Widget that displays any object that implements the [`TreeModel`][crate::TreeModel] interface.
    ///
    /// Please refer to the
    /// [tree widget conceptual overview](TreeWidget.html)
    /// for an overview of all the objects and data types related
    /// to the tree widget and how they work together.
    ///
    /// Several different coordinate systems are exposed in the GtkTreeView API.
    /// These are:
    ///
    /// ![](tree-view-coordinates.png)
    ///
    /// Coordinate systems in GtkTreeView API:
    ///
    /// - Widget coordinates: Coordinates relative to the widget (usually `widget->window`).
    ///
    /// - Bin window coordinates: Coordinates relative to the window that GtkTreeView renders to.
    ///
    /// - Tree coordinates: Coordinates relative to the entire scrollable area of GtkTreeView. These
    ///  coordinates start at (0, 0) for row 0 of the tree.
    ///
    /// Several functions are available for converting between the different
    /// coordinate systems. The most common translations are between widget and bin
    /// window coordinates and between bin window and tree coordinates. For the
    /// former you can use [`TreeViewExt::convert_widget_to_bin_window_coords()`][crate::prelude::TreeViewExt::convert_widget_to_bin_window_coords()]
    /// (and vice versa), for the latter [`TreeViewExt::convert_bin_window_to_tree_coords()`][crate::prelude::TreeViewExt::convert_bin_window_to_tree_coords()]
    /// (and vice versa).
    ///
    /// # GtkTreeView as GtkBuildable
    ///
    /// The GtkTreeView implementation of the GtkBuildable interface accepts
    /// [`TreeViewColumn`][crate::TreeViewColumn] objects as ``<child>`` elements and exposes the internal
    /// [`TreeSelection`][crate::TreeSelection] in UI definitions.
    ///
    /// An example of a UI definition fragment with GtkTreeView:
    ///
    ///
    ///
    /// **⚠️ The following code is in xml ⚠️**
    ///
    /// ```xml
    /// <object class="GtkTreeView" id="treeview">
    ///   <property name="model">liststore1</property>
    ///   <child>
    ///     <object class="GtkTreeViewColumn" id="test-column">
    ///       <property name="title">Test</property>
    ///       <child>
    ///         <object class="GtkCellRendererText" id="test-renderer"/>
    ///         <attributes>
    ///           <attribute name="text">1</attribute>
    ///         </attributes>
    ///       </child>
    ///     </object>
    ///   </child>
    ///   <child internal-child="selection">
    ///     <object class="GtkTreeSelection" id="selection">
    ///       <signal name="changed" handler="on_treeview_selection_changed"/>
    ///     </object>
    ///   </child>
    /// </object>
    /// ```
    ///
    /// # CSS nodes
    ///
    ///
    ///
    /// **⚠️ The following code is in plain ⚠️**
    ///
    /// ```plain
    /// treeview.view
    /// ├── header
    /// │   ├── <column header>
    /// ┊   ┊
    /// │   ╰── <column header>
    /// │
    /// ╰── [rubberband]
    /// ```
    ///
    /// GtkTreeView has a main CSS node with name treeview and style class .view.
    /// It has a subnode with name header, which is the parent for all the column
    /// header widgets' CSS nodes.
    /// For rubberband selection, a subnode with name rubberband is used.
    ///
    /// ## Properties
    ///
    ///
    /// #### `activate-on-single-click`
    ///  The activate-on-single-click property specifies whether the "row-activated" signal
    /// will be emitted after a single click.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `enable-grid-lines`
    ///  Readable | Writeable
    ///
    ///
    /// #### `enable-search`
    ///  Readable | Writeable
    ///
    ///
    /// #### `enable-tree-lines`
    ///  Readable | Writeable
    ///
    ///
    /// #### `expander-column`
    ///  Readable | Writeable
    ///
    ///
    /// #### `fixed-height-mode`
    ///  Setting the ::fixed-height-mode property to [`true`] speeds up
    /// [`TreeView`][crate::TreeView] by assuming that all rows have the same height.
    /// Only enable this option if all rows are the same height.
    /// Please see [`TreeViewExt::set_fixed_height_mode()`][crate::prelude::TreeViewExt::set_fixed_height_mode()] for more
    /// information on this option.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `headers-clickable`
    ///  Readable | Writeable
    ///
    ///
    /// #### `headers-visible`
    ///  Readable | Writeable
    ///
    ///
    /// #### `hover-expand`
    ///  Enables or disables the hover expansion mode of `tree_view`.
    /// Hover expansion makes rows expand or collapse if the pointer moves
    /// over them.
    ///
    /// This mode is primarily intended for treeviews in popups, e.g.
    /// in [`ComboBox`][crate::ComboBox] or [`EntryCompletion`][crate::EntryCompletion].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `hover-selection`
    ///  Enables or disables the hover selection mode of `tree_view`.
    /// Hover selection makes the selected row follow the pointer.
    /// Currently, this works only for the selection modes
    /// [`SelectionMode::Single`][crate::SelectionMode::Single] and [`SelectionMode::Browse`][crate::SelectionMode::Browse].
    ///
    /// This mode is primarily intended for treeviews in popups, e.g.
    /// in [`ComboBox`][crate::ComboBox] or [`EntryCompletion`][crate::EntryCompletion].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `level-indentation`
    ///  Extra indentation for each level.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `model`
    ///  Readable | Writeable
    ///
    ///
    /// #### `reorderable`
    ///  Readable | Writeable
    ///
    ///
    /// #### `rubber-banding`
    ///  Readable | Writeable
    ///
    ///
    /// #### `rules-hint`
    ///  Sets a hint to the theme to draw rows in alternating colors.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `search-column`
    ///  Readable | Writeable
    ///
    ///
    /// #### `show-expanders`
    ///  [`true`] if the view has expanders.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `tooltip-column`
    ///  Readable | Writeable
    /// <details><summary><h4>Container</h4></summary>
    ///
    ///
    /// #### `border-width`
    ///  Readable | Writeable
    ///
    ///
    /// #### `child`
    ///  Writeable
    ///
    ///
    /// #### `resize-mode`
    ///  Readable | Writeable
    /// </details>
    /// <details><summary><h4>Widget</h4></summary>
    ///
    ///
    /// #### `app-paintable`
    ///  Readable | Writeable
    ///
    ///
    /// #### `can-default`
    ///  Readable | Writeable
    ///
    ///
    /// #### `can-focus`
    ///  Readable | Writeable
    ///
    ///
    /// #### `composite-child`
    ///  Readable
    ///
    ///
    /// #### `double-buffered`
    ///  Whether the widget is double buffered.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `events`
    ///  Readable | Writeable
    ///
    ///
    /// #### `expand`
    ///  Whether to expand in both directions. Setting this sets both [`hexpand`][struct@crate::Widget#hexpand] and [`vexpand`][struct@crate::Widget#vexpand]
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `focus-on-click`
    ///  Whether the widget should grab focus when it is clicked with the mouse.
    ///
    /// This property is only relevant for widgets that can take focus.
    ///
    /// Before 3.20, several widgets (GtkButton, GtkFileChooserButton,
    /// GtkComboBox) implemented this property individually.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `halign`
    ///  How to distribute horizontal space if widget gets extra space, see [`Align`][crate::Align]
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `has-default`
    ///  Readable | Writeable
    ///
    ///
    /// #### `has-focus`
    ///  Readable | Writeable
    ///
    ///
    /// #### `has-tooltip`
    ///  Enables or disables the emission of [`query-tooltip`][struct@crate::Widget#query-tooltip] on `widget`.
    /// A value of [`true`] indicates that `widget` can have a tooltip, in this case
    /// the widget will be queried using [`query-tooltip`][struct@crate::Widget#query-tooltip] to determine
    /// whether it will provide a tooltip or not.
    ///
    /// Note that setting this property to [`true`] for the first time will change
    /// the event masks of the GdkWindows of this widget to include leave-notify
    /// and motion-notify events. This cannot and will not be undone when the
    /// property is set to [`false`] again.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `height-request`
    ///  Readable | Writeable
    ///
    ///
    /// #### `hexpand`
    ///  Whether to expand horizontally. See [`WidgetExt::set_hexpand()`][crate::prelude::WidgetExt::set_hexpand()].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `hexpand-set`
    ///  Whether to use the [`hexpand`][struct@crate::Widget#hexpand] property. See [`WidgetExt::is_hexpand_set()`][crate::prelude::WidgetExt::is_hexpand_set()].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `is-focus`
    ///  Readable | Writeable
    ///
    ///
    /// #### `margin`
    ///  Sets all four sides' margin at once. If read, returns max
    /// margin on any side.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-bottom`
    ///  Margin on bottom side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-end`
    ///  Margin on end of widget, horizontally. This property supports
    /// left-to-right and right-to-left text directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-left`
    ///  Margin on left side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-right`
    ///  Margin on right side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-start`
    ///  Margin on start of widget, horizontally. This property supports
    /// left-to-right and right-to-left text directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-top`
    ///  Margin on top side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `name`
    ///  Readable | Writeable
    ///
    ///
    /// #### `no-show-all`
    ///  Readable | Writeable
    ///
    ///
    /// #### `opacity`
    ///  The requested opacity of the widget. See [`WidgetExt::set_opacity()`][crate::prelude::WidgetExt::set_opacity()] for
    /// more details about window opacity.
    ///
    /// Before 3.8 this was only available in GtkWindow
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `parent`
    ///  Readable | Writeable
    ///
    ///
    /// #### `receives-default`
    ///  Readable | Writeable
    ///
    ///
    /// #### `scale-factor`
    ///  The scale factor of the widget. See [`WidgetExt::scale_factor()`][crate::prelude::WidgetExt::scale_factor()] for
    /// more details about widget scaling.
    ///
    /// Readable
    ///
    ///
    /// #### `sensitive`
    ///  Readable | Writeable
    ///
    ///
    /// #### `style`
    ///  The style of the widget, which contains information about how it will look (colors, etc).
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `tooltip-markup`
    ///  Sets the text of tooltip to be the given string, which is marked up
    /// with the [Pango text markup language][PangoMarkupFormat].
    /// Also see [`Tooltip::set_markup()`][crate::Tooltip::set_markup()].
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]: [`has-tooltip`][struct@crate::Widget#has-tooltip]
    /// will automatically be set to [`true`] and there will be taken care of
    /// [`query-tooltip`][struct@crate::Widget#query-tooltip] in the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and [`tooltip-markup`][struct@crate::Widget#tooltip-markup]
    /// are set, the last one wins.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `tooltip-text`
    ///  Sets the text of tooltip to be the given string.
    ///
    /// Also see [`Tooltip::set_text()`][crate::Tooltip::set_text()].
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]: [`has-tooltip`][struct@crate::Widget#has-tooltip]
    /// will automatically be set to [`true`] and there will be taken care of
    /// [`query-tooltip`][struct@crate::Widget#query-tooltip] in the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and [`tooltip-markup`][struct@crate::Widget#tooltip-markup]
    /// are set, the last one wins.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `valign`
    ///  How to distribute vertical space if widget gets extra space, see [`Align`][crate::Align]
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `vexpand`
    ///  Whether to expand vertically. See [`WidgetExt::set_vexpand()`][crate::prelude::WidgetExt::set_vexpand()].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `vexpand-set`
    ///  Whether to use the [`vexpand`][struct@crate::Widget#vexpand] property. See [`WidgetExt::is_vexpand_set()`][crate::prelude::WidgetExt::is_vexpand_set()].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `visible`
    ///  Readable | Writeable
    ///
    ///
    /// #### `width-request`
    ///  Readable | Writeable
    ///
    ///
    /// #### `window`
    ///  The widget's window if it is realized, [`None`] otherwise.
    ///
    /// Readable
    /// </details>
    /// <details><summary><h4>Scrollable</h4></summary>
    ///
    ///
    /// #### `hadjustment`
    ///  Horizontal [`Adjustment`][crate::Adjustment] of the scrollable widget. This adjustment is
    /// shared between the scrollable widget and its parent.
    ///
    /// Readable | Writeable | Construct
    ///
    ///
    /// #### `hscroll-policy`
    ///  Determines whether horizontal scrolling should start once the scrollable
    /// widget is allocated less than its minimum width or less than its natural width.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `vadjustment`
    ///  Verical [`Adjustment`][crate::Adjustment] of the scrollable widget. This adjustment is shared
    /// between the scrollable widget and its parent.
    ///
    /// Readable | Writeable | Construct
    ///
    ///
    /// #### `vscroll-policy`
    ///  Determines whether vertical scrolling should start once the scrollable
    /// widget is allocated less than its minimum height or less than its natural height.
    ///
    /// Readable | Writeable
    /// </details>
    ///
    /// ## Signals
    ///
    ///
    /// #### `columns-changed`
    ///  The number of columns of the treeview has changed.
    ///
    ///
    ///
    ///
    /// #### `cursor-changed`
    ///  The position of the cursor (focused cell) has changed.
    ///
    ///
    ///
    ///
    /// #### `expand-collapse-cursor-row`
    ///  Action
    ///
    ///
    /// #### `move-cursor`
    ///  The [`move-cursor`][struct@crate::TreeView#move-cursor] signal is a [keybinding
    /// signal][GtkBindingSignal] which gets emitted when the user
    /// presses one of the cursor keys.
    ///
    /// Applications should not connect to it, but may emit it with
    /// `g_signal_emit_by_name()` if they need to control the cursor
    /// programmatically. In contrast to [`TreeViewExt::set_cursor()`][crate::prelude::TreeViewExt::set_cursor()] and
    /// [`TreeViewExt::set_cursor_on_cell()`][crate::prelude::TreeViewExt::set_cursor_on_cell()] when moving horizontally
    /// [`move-cursor`][struct@crate::TreeView#move-cursor] does not reset the current selection.
    ///
    /// Action
    ///
    ///
    /// #### `row-activated`
    ///  The "row-activated" signal is emitted when the method
    /// [`TreeViewExt::row_activated()`][crate::prelude::TreeViewExt::row_activated()] is called, when the user double
    /// clicks a treeview row with the "activate-on-single-click"
    /// property set to [`false`], or when the user single clicks a row when
    /// the "activate-on-single-click" property set to [`true`]. It is also
    /// emitted when a non-editable row is selected and one of the keys:
    /// Space, Shift+Space, Return or Enter is pressed.
    ///
    /// For selection handling refer to the
    /// [tree widget conceptual overview](TreeWidget.html)
    /// as well as [`TreeSelection`][crate::TreeSelection].
    ///
    /// Action
    ///
    ///
    /// #### `row-collapsed`
    ///  The given row has been collapsed (child nodes are hidden).
    ///
    ///
    ///
    ///
    /// #### `row-expanded`
    ///  The given row has been expanded (child nodes are shown).
    ///
    ///
    ///
    ///
    /// #### `select-all`
    ///  Action
    ///
    ///
    /// #### `select-cursor-parent`
    ///  Action
    ///
    ///
    /// #### `select-cursor-row`
    ///  Action
    ///
    ///
    /// #### `start-interactive-search`
    ///  Action
    ///
    ///
    /// #### `test-collapse-row`
    ///  The given row is about to be collapsed (hide its children nodes). Use this
    /// signal if you need to control the collapsibility of individual rows.
    ///
    ///
    ///
    ///
    /// #### `test-expand-row`
    ///  The given row is about to be expanded (show its children nodes). Use this
    /// signal if you need to control the expandability of individual rows.
    ///
    ///
    ///
    ///
    /// #### `toggle-cursor-row`
    ///  Action
    ///
    ///
    /// #### `unselect-all`
    ///  Action
    /// <details><summary><h4>Container</h4></summary>
    ///
    ///
    /// #### `add`
    ///
    ///
    ///
    /// #### `check-resize`
    ///
    ///
    ///
    /// #### `remove`
    ///
    ///
    ///
    /// #### `set-focus-child`
    ///
    /// </details>
    /// <details><summary><h4>Widget</h4></summary>
    ///
    ///
    /// #### `accel-closures-changed`
    ///
    ///
    ///
    /// #### `button-press-event`
    ///  The ::button-press-event signal will be emitted when a button
    /// (typically from a mouse) is pressed.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the
    /// widget needs to enable the [`gdk::EventMask::BUTTON_PRESS_MASK`][crate::gdk::EventMask::BUTTON_PRESS_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `button-release-event`
    ///  The ::button-release-event signal will be emitted when a button
    /// (typically from a mouse) is released.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the
    /// widget needs to enable the [`gdk::EventMask::BUTTON_RELEASE_MASK`][crate::gdk::EventMask::BUTTON_RELEASE_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `can-activate-accel`
    ///  Determines whether an accelerator that activates the signal
    /// identified by `signal_id` can currently be activated.
    /// This signal is present to allow applications and derived
    /// widgets to override the default [`Widget`][crate::Widget] handling
    /// for determining whether an accelerator can be activated.
    ///
    ///
    ///
    ///
    /// #### `child-notify`
    ///  The ::child-notify signal is emitted for each
    /// [child property][child-properties] that has
    /// changed on an object. The signal's detail holds the property name.
    ///
    /// Detailed
    ///
    ///
    /// #### `composited-changed`
    ///  The ::composited-changed signal is emitted when the composited
    /// status of `widgets` screen changes.
    /// See [`Screen::is_composited()`][crate::gdk::Screen::is_composited()].
    ///
    /// Action
    ///
    ///
    /// #### `configure-event`
    ///  The ::configure-event signal will be emitted when the size, position or
    /// stacking of the `widget`'s window has changed.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::STRUCTURE_MASK`][crate::gdk::EventMask::STRUCTURE_MASK] mask. GDK will enable this mask
    /// automatically for all new windows.
    ///
    ///
    ///
    ///
    /// #### `damage-event`
    ///  Emitted when a redirected window belonging to `widget` gets drawn into.
    /// The region/area members of the event shows what area of the redirected
    /// drawable was drawn into.
    ///
    ///
    ///
    ///
    /// #### `delete-event`
    ///  The ::delete-event signal is emitted if a user requests that
    /// a toplevel window is closed. The default handler for this signal
    /// destroys the window. Connecting [`WidgetExtManual::hide_on_delete()`][crate::prelude::WidgetExtManual::hide_on_delete()] to
    /// this signal will cause the window to be hidden instead, so that
    /// it can later be shown again without reconstructing it.
    ///
    ///
    ///
    ///
    /// #### `destroy`
    ///  Signals that all holders of a reference to the widget should release
    /// the reference that they hold. May result in finalization of the widget
    /// if all references are released.
    ///
    /// This signal is not suitable for saving widget state.
    ///
    ///
    ///
    ///
    /// #### `destroy-event`
    ///  The ::destroy-event signal is emitted when a [`gdk::Window`][crate::gdk::Window] is destroyed.
    /// You rarely get this signal, because most widgets disconnect themselves
    /// from their window before they destroy it, so no widget owns the
    /// window at destroy time.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::STRUCTURE_MASK`][crate::gdk::EventMask::STRUCTURE_MASK] mask. GDK will enable this mask
    /// automatically for all new windows.
    ///
    ///
    ///
    ///
    /// #### `direction-changed`
    ///  The ::direction-changed signal is emitted when the text direction
    /// of a widget changes.
    ///
    ///
    ///
    ///
    /// #### `drag-begin`
    ///  The ::drag-begin signal is emitted on the drag source when a drag is
    /// started. A typical reason to connect to this signal is to set up a
    /// custom drag icon with e.g. [`WidgetExt::drag_source_set_icon_pixbuf()`][crate::prelude::WidgetExt::drag_source_set_icon_pixbuf()].
    ///
    /// Note that some widgets set up a drag icon in the default handler of
    /// this signal, so you may have to use `g_signal_connect_after()` to
    /// override what the default handler did.
    ///
    ///
    ///
    ///
    /// #### `drag-data-delete`
    ///  The ::drag-data-delete signal is emitted on the drag source when a drag
    /// with the action [`gdk::DragAction::MOVE`][crate::gdk::DragAction::MOVE] is successfully completed. The signal
    /// handler is responsible for deleting the data that has been dropped. What
    /// "delete" means depends on the context of the drag operation.
    ///
    ///
    ///
    ///
    /// #### `drag-data-get`
    ///  The ::drag-data-get signal is emitted on the drag source when the drop
    /// site requests the data which is dragged. It is the responsibility of
    /// the signal handler to fill `data` with the data in the format which
    /// is indicated by `info`. See [`SelectionData::set()`][crate::SelectionData::set()] and
    /// [`SelectionData::set_text()`][crate::SelectionData::set_text()].
    ///
    ///
    ///
    ///
    /// #### `drag-data-received`
    ///  The ::drag-data-received signal is emitted on the drop site when the
    /// dragged data has been received. If the data was received in order to
    /// determine whether the drop will be accepted, the handler is expected
    /// to call `gdk_drag_status()` and not finish the drag.
    /// If the data was received in response to a [`drag-drop`][struct@crate::Widget#drag-drop] signal
    /// (and this is the last target to be received), the handler for this
    /// signal is expected to process the received data and then call
    /// `gtk_drag_finish()`, setting the `success` parameter depending on
    /// whether the data was processed successfully.
    ///
    /// Applications must create some means to determine why the signal was emitted
    /// and therefore whether to call `gdk_drag_status()` or `gtk_drag_finish()`.
    ///
    /// The handler may inspect the selected action with
    /// [`DragContext::selected_action()`][crate::gdk::DragContext::selected_action()] before calling
    /// `gtk_drag_finish()`, e.g. to implement [`gdk::DragAction::ASK`][crate::gdk::DragAction::ASK] as
    /// shown in the following example:
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// void
    /// drag_data_received (GtkWidget          *widget,
    ///                     GdkDragContext     *context,
    ///                     gint                x,
    ///                     gint                y,
    ///                     GtkSelectionData   *data,
    ///                     guint               info,
    ///                     guint               time)
    /// {
    ///   if ((data->length >= 0) && (data->format == 8))
    ///     {
    ///       GdkDragAction action;
    ///
    ///       // handle data here
    ///
    ///       action = gdk_drag_context_get_selected_action (context);
    ///       if (action == GDK_ACTION_ASK)
    ///         {
    ///           GtkWidget *dialog;
    ///           gint response;
    ///
    ///           dialog = gtk_message_dialog_new (NULL,
    ///                                            GTK_DIALOG_MODAL |
    ///                                            GTK_DIALOG_DESTROY_WITH_PARENT,
    ///                                            GTK_MESSAGE_INFO,
    ///                                            GTK_BUTTONS_YES_NO,
    ///                                            "Move the data ?\n");
    ///           response = gtk_dialog_run (GTK_DIALOG (dialog));
    ///           gtk_widget_destroy (dialog);
    ///
    ///           if (response == GTK_RESPONSE_YES)
    ///             action = GDK_ACTION_MOVE;
    ///           else
    ///             action = GDK_ACTION_COPY;
    ///          }
    ///
    ///       gtk_drag_finish (context, TRUE, action == GDK_ACTION_MOVE, time);
    ///     }
    ///   else
    ///     gtk_drag_finish (context, FALSE, FALSE, time);
    ///  }
    /// ```
    ///
    ///
    ///
    ///
    /// #### `drag-drop`
    ///  The ::drag-drop signal is emitted on the drop site when the user drops
    /// the data onto the widget. The signal handler must determine whether
    /// the cursor position is in a drop zone or not. If it is not in a drop
    /// zone, it returns [`false`] and no further processing is necessary.
    /// Otherwise, the handler returns [`true`]. In this case, the handler must
    /// ensure that `gtk_drag_finish()` is called to let the source know that
    /// the drop is done. The call to `gtk_drag_finish()` can be done either
    /// directly or in a [`drag-data-received`][struct@crate::Widget#drag-data-received] handler which gets
    /// triggered by calling [`WidgetExt::drag_get_data()`][crate::prelude::WidgetExt::drag_get_data()] to receive the data for one
    /// or more of the supported targets.
    ///
    ///
    ///
    ///
    /// #### `drag-end`
    ///  The ::drag-end signal is emitted on the drag source when a drag is
    /// finished. A typical reason to connect to this signal is to undo
    /// things done in [`drag-begin`][struct@crate::Widget#drag-begin].
    ///
    ///
    ///
    ///
    /// #### `drag-failed`
    ///  The ::drag-failed signal is emitted on the drag source when a drag has
    /// failed. The signal handler may hook custom code to handle a failed DnD
    /// operation based on the type of error, it returns [`true`] is the failure has
    /// been already handled (not showing the default "drag operation failed"
    /// animation), otherwise it returns [`false`].
    ///
    ///
    ///
    ///
    /// #### `drag-leave`
    ///  The ::drag-leave signal is emitted on the drop site when the cursor
    /// leaves the widget. A typical reason to connect to this signal is to
    /// undo things done in [`drag-motion`][struct@crate::Widget#drag-motion], e.g. undo highlighting
    /// with [`WidgetExt::drag_unhighlight()`][crate::prelude::WidgetExt::drag_unhighlight()].
    ///
    ///
    /// Likewise, the [`drag-leave`][struct@crate::Widget#drag-leave] signal is also emitted before the
    /// ::drag-drop signal, for instance to allow cleaning up of a preview item
    /// created in the [`drag-motion`][struct@crate::Widget#drag-motion] signal handler.
    ///
    ///
    ///
    ///
    /// #### `drag-motion`
    ///  The ::drag-motion signal is emitted on the drop site when the user
    /// moves the cursor over the widget during a drag. The signal handler
    /// must determine whether the cursor position is in a drop zone or not.
    /// If it is not in a drop zone, it returns [`false`] and no further processing
    /// is necessary. Otherwise, the handler returns [`true`]. In this case, the
    /// handler is responsible for providing the necessary information for
    /// displaying feedback to the user, by calling `gdk_drag_status()`.
    ///
    /// If the decision whether the drop will be accepted or rejected can't be
    /// made based solely on the cursor position and the type of the data, the
    /// handler may inspect the dragged data by calling [`WidgetExt::drag_get_data()`][crate::prelude::WidgetExt::drag_get_data()] and
    /// defer the `gdk_drag_status()` call to the [`drag-data-received`][struct@crate::Widget#drag-data-received]
    /// handler. Note that you must pass [`DestDefaults::DROP`][crate::DestDefaults::DROP],
    /// [`DestDefaults::MOTION`][crate::DestDefaults::MOTION] or [`DestDefaults::ALL`][crate::DestDefaults::ALL] to [`WidgetExtManual::drag_dest_set()`][crate::prelude::WidgetExtManual::drag_dest_set()]
    /// when using the drag-motion signal that way.
    ///
    /// Also note that there is no drag-enter signal. The drag receiver has to
    /// keep track of whether he has received any drag-motion signals since the
    /// last [`drag-leave`][struct@crate::Widget#drag-leave] and if not, treat the drag-motion signal as
    /// an "enter" signal. Upon an "enter", the handler will typically highlight
    /// the drop site with [`WidgetExt::drag_highlight()`][crate::prelude::WidgetExt::drag_highlight()].
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// static void
    /// drag_motion (GtkWidget      *widget,
    ///              GdkDragContext *context,
    ///              gint            x,
    ///              gint            y,
    ///              guint           time)
    /// {
    ///   GdkAtom target;
    ///
    ///   PrivateData *private_data = GET_PRIVATE_DATA (widget);
    ///
    ///   if (!private_data->drag_highlight)
    ///    {
    ///      private_data->drag_highlight = 1;
    ///      gtk_drag_highlight (widget);
    ///    }
    ///
    ///   target = gtk_drag_dest_find_target (widget, context, NULL);
    ///   if (target == GDK_NONE)
    ///     gdk_drag_status (context, 0, time);
    ///   else
    ///    {
    ///      private_data->pending_status
    ///         = gdk_drag_context_get_suggested_action (context);
    ///      gtk_drag_get_data (widget, context, target, time);
    ///    }
    ///
    ///   return TRUE;
    /// }
    ///
    /// static void
    /// drag_data_received (GtkWidget        *widget,
    ///                     GdkDragContext   *context,
    ///                     gint              x,
    ///                     gint              y,
    ///                     GtkSelectionData *selection_data,
    ///                     guint             info,
    ///                     guint             time)
    /// {
    ///   PrivateData *private_data = GET_PRIVATE_DATA (widget);
    ///
    ///   if (private_data->suggested_action)
    ///    {
    ///      private_data->suggested_action = 0;
    ///
    ///      // We are getting this data due to a request in drag_motion,
    ///      // rather than due to a request in drag_drop, so we are just
    ///      // supposed to call gdk_drag_status(), not actually paste in
    ///      // the data.
    ///
    ///      str = gtk_selection_data_get_text (selection_data);
    ///      if (!data_is_acceptable (str))
    ///        gdk_drag_status (context, 0, time);
    ///      else
    ///        gdk_drag_status (context,
    ///                         private_data->suggested_action,
    ///                         time);
    ///    }
    ///   else
    ///    {
    ///      // accept the drop
    ///    }
    /// }
    /// ```
    ///
    ///
    ///
    ///
    /// #### `draw`
    ///  This signal is emitted when a widget is supposed to render itself.
    /// The `widget`'s top left corner must be painted at the origin of
    /// the passed in context and be sized to the values returned by
    /// [`WidgetExt::allocated_width()`][crate::prelude::WidgetExt::allocated_width()] and
    /// [`WidgetExt::allocated_height()`][crate::prelude::WidgetExt::allocated_height()].
    ///
    /// Signal handlers connected to this signal can modify the cairo
    /// context passed as `cr` in any way they like and don't need to
    /// restore it. The signal emission takes care of calling `cairo_save()`
    /// before and `cairo_restore()` after invoking the handler.
    ///
    /// The signal handler will get a `cr` with a clip region already set to the
    /// widget's dirty region, i.e. to the area that needs repainting. Complicated
    /// widgets that want to avoid redrawing themselves completely can get the full
    /// extents of the clip region with `gdk_cairo_get_clip_rectangle()`, or they can
    /// get a finer-grained representation of the dirty region with
    /// `cairo_copy_clip_rectangle_list()`.
    ///
    ///
    ///
    ///
    /// #### `enter-notify-event`
    ///  The ::enter-notify-event will be emitted when the pointer enters
    /// the `widget`'s window.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::ENTER_NOTIFY_MASK`][crate::gdk::EventMask::ENTER_NOTIFY_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `event`
    ///  The GTK+ main loop will emit three signals for each GDK event delivered
    /// to a widget: one generic ::event signal, another, more specific,
    /// signal that matches the type of event delivered (e.g.
    /// [`key-press-event`][struct@crate::Widget#key-press-event]) and finally a generic
    /// [`event-after`][struct@crate::Widget#event-after] signal.
    ///
    ///
    ///
    ///
    /// #### `event-after`
    ///  After the emission of the [`event`][struct@crate::Widget#event] signal and (optionally)
    /// the second more specific signal, ::event-after will be emitted
    /// regardless of the previous two signals handlers return values.
    ///
    ///
    ///
    ///
    /// #### `focus`
    ///
    ///
    ///
    /// #### `focus-in-event`
    ///  The ::focus-in-event signal will be emitted when the keyboard focus
    /// enters the `widget`'s window.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::FOCUS_CHANGE_MASK`][crate::gdk::EventMask::FOCUS_CHANGE_MASK] mask.
    ///
    ///
    ///
    ///
    /// #### `focus-out-event`
    ///  The ::focus-out-event signal will be emitted when the keyboard focus
    /// leaves the `widget`'s window.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::FOCUS_CHANGE_MASK`][crate::gdk::EventMask::FOCUS_CHANGE_MASK] mask.
    ///
    ///
    ///
    ///
    /// #### `grab-broken-event`
    ///  Emitted when a pointer or keyboard grab on a window belonging
    /// to `widget` gets broken.
    ///
    /// On X11, this happens when the grab window becomes unviewable
    /// (i.e. it or one of its ancestors is unmapped), or if the same
    /// application grabs the pointer or keyboard again.
    ///
    ///
    ///
    ///
    /// #### `grab-focus`
    ///  Action
    ///
    ///
    /// #### `grab-notify`
    ///  The ::grab-notify signal is emitted when a widget becomes
    /// shadowed by a GTK+ grab (not a pointer or keyboard grab) on
    /// another widget, or when it becomes unshadowed due to a grab
    /// being removed.
    ///
    /// A widget is shadowed by a [`WidgetExt::grab_add()`][crate::prelude::WidgetExt::grab_add()] when the topmost
    /// grab widget in the grab stack of its window group is not
    /// its ancestor.
    ///
    ///
    ///
    ///
    /// #### `hide`
    ///  The ::hide signal is emitted when `widget` is hidden, for example with
    /// [`WidgetExt::hide()`][crate::prelude::WidgetExt::hide()].
    ///
    ///
    ///
    ///
    /// #### `hierarchy-changed`
    ///  The ::hierarchy-changed signal is emitted when the
    /// anchored state of a widget changes. A widget is
    /// “anchored” when its toplevel
    /// ancestor is a [`Window`][crate::Window]. This signal is emitted when
    /// a widget changes from un-anchored to anchored or vice-versa.
    ///
    ///
    ///
    ///
    /// #### `key-press-event`
    ///  The ::key-press-event signal is emitted when a key is pressed. The signal
    /// emission will reoccur at the key-repeat rate when the key is kept pressed.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::KEY_PRESS_MASK`][crate::gdk::EventMask::KEY_PRESS_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `key-release-event`
    ///  The ::key-release-event signal is emitted when a key is released.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::KEY_RELEASE_MASK`][crate::gdk::EventMask::KEY_RELEASE_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `keynav-failed`
    ///  Gets emitted if keyboard navigation fails.
    /// See [`WidgetExt::keynav_failed()`][crate::prelude::WidgetExt::keynav_failed()] for details.
    ///
    ///
    ///
    ///
    /// #### `leave-notify-event`
    ///  The ::leave-notify-event will be emitted when the pointer leaves
    /// the `widget`'s window.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::LEAVE_NOTIFY_MASK`][crate::gdk::EventMask::LEAVE_NOTIFY_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `map`
    ///  The ::map signal is emitted when `widget` is going to be mapped, that is
    /// when the widget is visible (which is controlled with
    /// [`WidgetExt::set_visible()`][crate::prelude::WidgetExt::set_visible()]) and all its parents up to the toplevel widget
    /// are also visible. Once the map has occurred, [`map-event`][struct@crate::Widget#map-event] will
    /// be emitted.
    ///
    /// The ::map signal can be used to determine whether a widget will be drawn,
    /// for instance it can resume an animation that was stopped during the
    /// emission of [`unmap`][struct@crate::Widget#unmap].
    ///
    ///
    ///
    ///
    /// #### `map-event`
    ///  The ::map-event signal will be emitted when the `widget`'s window is
    /// mapped. A window is mapped when it becomes visible on the screen.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::STRUCTURE_MASK`][crate::gdk::EventMask::STRUCTURE_MASK] mask. GDK will enable this mask
    /// automatically for all new windows.
    ///
    ///
    ///
    ///
    /// #### `mnemonic-activate`
    ///  The default handler for this signal activates `widget` if `group_cycling`
    /// is [`false`], or just makes `widget` grab focus if `group_cycling` is [`true`].
    ///
    ///
    ///
    ///
    /// #### `motion-notify-event`
    ///  The ::motion-notify-event signal is emitted when the pointer moves
    /// over the widget's [`gdk::Window`][crate::gdk::Window].
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget
    /// needs to enable the [`gdk::EventMask::POINTER_MOTION_MASK`][crate::gdk::EventMask::POINTER_MOTION_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `move-focus`
    ///  Action
    ///
    ///
    /// #### `parent-set`
    ///  The ::parent-set signal is emitted when a new parent
    /// has been set on a widget.
    ///
    ///
    ///
    ///
    /// #### `popup-menu`
    ///  This signal gets emitted whenever a widget should pop up a context
    /// menu. This usually happens through the standard key binding mechanism;
    /// by pressing a certain key while a widget is focused, the user can cause
    /// the widget to pop up a menu. For example, the [`Entry`][crate::Entry] widget creates
    /// a menu with clipboard commands. See the
    /// [Popup Menu Migration Checklist][checklist-popup-menu]
    /// for an example of how to use this signal.
    ///
    /// Action
    ///
    ///
    /// #### `property-notify-event`
    ///  The ::property-notify-event signal will be emitted when a property on
    /// the `widget`'s window has been changed or deleted.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::PROPERTY_CHANGE_MASK`][crate::gdk::EventMask::PROPERTY_CHANGE_MASK] mask.
    ///
    ///
    ///
    ///
    /// #### `proximity-in-event`
    ///  To receive this signal the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::PROXIMITY_IN_MASK`][crate::gdk::EventMask::PROXIMITY_IN_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `proximity-out-event`
    ///  To receive this signal the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::PROXIMITY_OUT_MASK`][crate::gdk::EventMask::PROXIMITY_OUT_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `query-tooltip`
    ///  Emitted when [`has-tooltip`][struct@crate::Widget#has-tooltip] is [`true`] and the hover timeout
    /// has expired with the cursor hovering "above" `widget`; or emitted when `widget` got
    /// focus in keyboard mode.
    ///
    /// Using the given coordinates, the signal handler should determine
    /// whether a tooltip should be shown for `widget`. If this is the case
    /// [`true`] should be returned, [`false`] otherwise. Note that if
    /// `keyboard_mode` is [`true`], the values of `x` and `y` are undefined and
    /// should not be used.
    ///
    /// The signal handler is free to manipulate `tooltip` with the therefore
    /// destined function calls.
    ///
    ///
    ///
    ///
    /// #### `realize`
    ///  The ::realize signal is emitted when `widget` is associated with a
    /// [`gdk::Window`][crate::gdk::Window], which means that [`WidgetExt::realize()`][crate::prelude::WidgetExt::realize()] has been called or the
    /// widget has been mapped (that is, it is going to be drawn).
    ///
    ///
    ///
    ///
    /// #### `screen-changed`
    ///  The ::screen-changed signal gets emitted when the
    /// screen of a widget has changed.
    ///
    ///
    ///
    ///
    /// #### `scroll-event`
    ///  The ::scroll-event signal is emitted when a button in the 4 to 7
    /// range is pressed. Wheel mice are usually configured to generate
    /// button press events for buttons 4 and 5 when the wheel is turned.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::SCROLL_MASK`][crate::gdk::EventMask::SCROLL_MASK] mask.
    ///
    /// This signal will be sent to the grab widget if there is one.
    ///
    ///
    ///
    ///
    /// #### `selection-clear-event`
    ///  The ::selection-clear-event signal will be emitted when the
    /// the `widget`'s window has lost ownership of a selection.
    ///
    ///
    ///
    ///
    /// #### `selection-get`
    ///
    ///
    ///
    /// #### `selection-notify-event`
    ///
    ///
    ///
    /// #### `selection-received`
    ///
    ///
    ///
    /// #### `selection-request-event`
    ///  The ::selection-request-event signal will be emitted when
    /// another client requests ownership of the selection owned by
    /// the `widget`'s window.
    ///
    ///
    ///
    ///
    /// #### `show`
    ///  The ::show signal is emitted when `widget` is shown, for example with
    /// [`WidgetExt::show()`][crate::prelude::WidgetExt::show()].
    ///
    ///
    ///
    ///
    /// #### `show-help`
    ///  Action
    ///
    ///
    /// #### `size-allocate`
    ///
    ///
    ///
    /// #### `state-changed`
    ///  The ::state-changed signal is emitted when the widget state changes.
    /// See `gtk_widget_get_state()`.
    ///
    ///
    ///
    ///
    /// #### `state-flags-changed`
    ///  The ::state-flags-changed signal is emitted when the widget state
    /// changes, see [`WidgetExt::state_flags()`][crate::prelude::WidgetExt::state_flags()].
    ///
    ///
    ///
    ///
    /// #### `style-set`
    ///  The ::style-set signal is emitted when a new style has been set
    /// on a widget. Note that style-modifying functions like
    /// `gtk_widget_modify_base()` also cause this signal to be emitted.
    ///
    /// Note that this signal is emitted for changes to the deprecated
    /// `GtkStyle`. To track changes to the [`StyleContext`][crate::StyleContext] associated
    /// with a widget, use the [`style-updated`][struct@crate::Widget#style-updated] signal.
    ///
    ///
    ///
    ///
    /// #### `style-updated`
    ///  The ::style-updated signal is a convenience signal that is emitted when the
    /// [`changed`][struct@crate::StyleContext#changed] signal is emitted on the `widget`'s associated
    /// [`StyleContext`][crate::StyleContext] as returned by [`WidgetExt::style_context()`][crate::prelude::WidgetExt::style_context()].
    ///
    /// Note that style-modifying functions like `gtk_widget_override_color()` also
    /// cause this signal to be emitted.
    ///
    ///
    ///
    ///
    /// #### `touch-event`
    ///
    ///
    ///
    /// #### `unmap`
    ///  The ::unmap signal is emitted when `widget` is going to be unmapped, which
    /// means that either it or any of its parents up to the toplevel widget have
    /// been set as hidden.
    ///
    /// As ::unmap indicates that a widget will not be shown any longer, it can be
    /// used to, for example, stop an animation on the widget.
    ///
    ///
    ///
    ///
    /// #### `unmap-event`
    ///  The ::unmap-event signal will be emitted when the `widget`'s window is
    /// unmapped. A window is unmapped when it becomes invisible on the screen.
    ///
    /// To receive this signal, the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::STRUCTURE_MASK`][crate::gdk::EventMask::STRUCTURE_MASK] mask. GDK will enable this mask
    /// automatically for all new windows.
    ///
    ///
    ///
    ///
    /// #### `unrealize`
    ///  The ::unrealize signal is emitted when the [`gdk::Window`][crate::gdk::Window] associated with
    /// `widget` is destroyed, which means that [`WidgetExt::unrealize()`][crate::prelude::WidgetExt::unrealize()] has been
    /// called or the widget has been unmapped (that is, it is going to be
    /// hidden).
    ///
    ///
    ///
    ///
    /// #### `visibility-notify-event`
    ///  The ::visibility-notify-event will be emitted when the `widget`'s
    /// window is obscured or unobscured.
    ///
    /// To receive this signal the [`gdk::Window`][crate::gdk::Window] associated to the widget needs
    /// to enable the [`gdk::EventMask::VISIBILITY_NOTIFY_MASK`][crate::gdk::EventMask::VISIBILITY_NOTIFY_MASK] mask.
    ///
    ///
    ///
    ///
    /// #### `window-state-event`
    ///  The ::window-state-event will be emitted when the state of the
    /// toplevel window associated to the `widget` changes.
    ///
    /// To receive this signal the [`gdk::Window`][crate::gdk::Window] associated to the widget
    /// needs to enable the [`gdk::EventMask::STRUCTURE_MASK`][crate::gdk::EventMask::STRUCTURE_MASK] mask. GDK will enable
    /// this mask automatically for all new windows.
    ///
    ///
    /// </details>
    ///
    /// # Implements
    ///
    /// [`TreeViewExt`][trait@crate::prelude::TreeViewExt], [`ContainerExt`][trait@crate::prelude::ContainerExt], [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`ScrollableExt`][trait@crate::prelude::ScrollableExt], [`ContainerExtManual`][trait@crate::prelude::ContainerExtManual], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`BuildableExtManual`][trait@crate::prelude::BuildableExtManual]
    #[doc(alias = "GtkTreeView")]
    pub struct TreeView(Object<ffi::GtkTreeView, ffi::GtkTreeViewClass>) @extends Container, Widget, @implements Buildable, Scrollable;

    match fn {
        type_ => || ffi::gtk_tree_view_get_type(),
    }
}

impl TreeView {
    pub const NONE: Option<&'static TreeView> = None;

    /// Creates a new [`TreeView`][crate::TreeView] widget.
    ///
    /// # Returns
    ///
    /// A newly created [`TreeView`][crate::TreeView] widget.
    #[doc(alias = "gtk_tree_view_new")]
    pub fn new() -> TreeView {
        assert_initialized_main_thread!();
        unsafe { Widget::from_glib_none(ffi::gtk_tree_view_new()).unsafe_cast() }
    }

    /// Creates a new [`TreeView`][crate::TreeView] widget with the model initialized to `model`.
    /// ## `model`
    /// the model.
    ///
    /// # Returns
    ///
    /// A newly created [`TreeView`][crate::TreeView] widget.
    #[doc(alias = "gtk_tree_view_new_with_model")]
    #[doc(alias = "new_with_model")]
    pub fn with_model(model: &impl IsA<TreeModel>) -> TreeView {
        skip_assert_initialized!();
        unsafe {
            Widget::from_glib_none(ffi::gtk_tree_view_new_with_model(
                model.as_ref().to_glib_none().0,
            ))
            .unsafe_cast()
        }
    }

    // rustdoc-stripper-ignore-next
    /// Creates a new builder-pattern struct instance to construct [`TreeView`] objects.
    ///
    /// This method returns an instance of [`TreeViewBuilder`](crate::builders::TreeViewBuilder) which can be used to create [`TreeView`] objects.
    pub fn builder() -> TreeViewBuilder {
        TreeViewBuilder::new()
    }
}

impl Default for TreeView {
    fn default() -> Self {
        Self::new()
    }
}

// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`TreeView`] objects.
///
/// [builder-pattern]: https://doc.rust-lang.org/1.0.0/style/ownership/builders.html
#[must_use = "The builder must be built to be used"]
pub struct TreeViewBuilder {
    builder: glib::object::ObjectBuilder<'static, TreeView>,
}

impl TreeViewBuilder {
    fn new() -> Self {
        Self {
            builder: glib::object::Object::builder(),
        }
    }

    /// The activate-on-single-click property specifies whether the "row-activated" signal
    /// will be emitted after a single click.
    pub fn activate_on_single_click(self, activate_on_single_click: bool) -> Self {
        Self {
            builder: self
                .builder
                .property("activate-on-single-click", activate_on_single_click),
        }
    }

    pub fn enable_grid_lines(self, enable_grid_lines: TreeViewGridLines) -> Self {
        Self {
            builder: self
                .builder
                .property("enable-grid-lines", enable_grid_lines),
        }
    }

    pub fn enable_search(self, enable_search: bool) -> Self {
        Self {
            builder: self.builder.property("enable-search", enable_search),
        }
    }

    pub fn enable_tree_lines(self, enable_tree_lines: bool) -> Self {
        Self {
            builder: self
                .builder
                .property("enable-tree-lines", enable_tree_lines),
        }
    }

    pub fn expander_column(self, expander_column: &impl IsA<TreeViewColumn>) -> Self {
        Self {
            builder: self
                .builder
                .property("expander-column", expander_column.clone().upcast()),
        }
    }

    /// Setting the ::fixed-height-mode property to [`true`] speeds up
    /// [`TreeView`][crate::TreeView] by assuming that all rows have the same height.
    /// Only enable this option if all rows are the same height.
    /// Please see [`TreeViewExt::set_fixed_height_mode()`][crate::prelude::TreeViewExt::set_fixed_height_mode()] for more
    /// information on this option.
    pub fn fixed_height_mode(self, fixed_height_mode: bool) -> Self {
        Self {
            builder: self
                .builder
                .property("fixed-height-mode", fixed_height_mode),
        }
    }

    pub fn headers_clickable(self, headers_clickable: bool) -> Self {
        Self {
            builder: self
                .builder
                .property("headers-clickable", headers_clickable),
        }
    }

    pub fn headers_visible(self, headers_visible: bool) -> Self {
        Self {
            builder: self.builder.property("headers-visible", headers_visible),
        }
    }

    /// Enables or disables the hover expansion mode of `tree_view`.
    /// Hover expansion makes rows expand or collapse if the pointer moves
    /// over them.
    ///
    /// This mode is primarily intended for treeviews in popups, e.g.
    /// in [`ComboBox`][crate::ComboBox] or [`EntryCompletion`][crate::EntryCompletion].
    pub fn hover_expand(self, hover_expand: bool) -> Self {
        Self {
            builder: self.builder.property("hover-expand", hover_expand),
        }
    }

    /// Enables or disables the hover selection mode of `tree_view`.
    /// Hover selection makes the selected row follow the pointer.
    /// Currently, this works only for the selection modes
    /// [`SelectionMode::Single`][crate::SelectionMode::Single] and [`SelectionMode::Browse`][crate::SelectionMode::Browse].
    ///
    /// This mode is primarily intended for treeviews in popups, e.g.
    /// in [`ComboBox`][crate::ComboBox] or [`EntryCompletion`][crate::EntryCompletion].
    pub fn hover_selection(self, hover_selection: bool) -> Self {
        Self {
            builder: self.builder.property("hover-selection", hover_selection),
        }
    }

    /// Extra indentation for each level.
    pub fn level_indentation(self, level_indentation: i32) -> Self {
        Self {
            builder: self
                .builder
                .property("level-indentation", level_indentation),
        }
    }

    pub fn model(self, model: &impl IsA<TreeModel>) -> Self {
        Self {
            builder: self.builder.property("model", model.clone().upcast()),
        }
    }

    pub fn reorderable(self, reorderable: bool) -> Self {
        Self {
            builder: self.builder.property("reorderable", reorderable),
        }
    }

    pub fn rubber_banding(self, rubber_banding: bool) -> Self {
        Self {
            builder: self.builder.property("rubber-banding", rubber_banding),
        }
    }

    pub fn search_column(self, search_column: i32) -> Self {
        Self {
            builder: self.builder.property("search-column", search_column),
        }
    }

    /// [`true`] if the view has expanders.
    pub fn show_expanders(self, show_expanders: bool) -> Self {
        Self {
            builder: self.builder.property("show-expanders", show_expanders),
        }
    }

    pub fn tooltip_column(self, tooltip_column: i32) -> Self {
        Self {
            builder: self.builder.property("tooltip-column", tooltip_column),
        }
    }

    pub fn border_width(self, border_width: u32) -> Self {
        Self {
            builder: self.builder.property("border-width", border_width),
        }
    }

    pub fn child(self, child: &impl IsA<Widget>) -> Self {
        Self {
            builder: self.builder.property("child", child.clone().upcast()),
        }
    }

    pub fn resize_mode(self, resize_mode: ResizeMode) -> Self {
        Self {
            builder: self.builder.property("resize-mode", resize_mode),
        }
    }

    pub fn app_paintable(self, app_paintable: bool) -> Self {
        Self {
            builder: self.builder.property("app-paintable", app_paintable),
        }
    }

    pub fn can_default(self, can_default: bool) -> Self {
        Self {
            builder: self.builder.property("can-default", can_default),
        }
    }

    pub fn can_focus(self, can_focus: bool) -> Self {
        Self {
            builder: self.builder.property("can-focus", can_focus),
        }
    }

    pub fn events(self, events: gdk::EventMask) -> Self {
        Self {
            builder: self.builder.property("events", events),
        }
    }

    /// Whether to expand in both directions. Setting this sets both [`hexpand`][struct@crate::Widget#hexpand] and [`vexpand`][struct@crate::Widget#vexpand]
    pub fn expand(self, expand: bool) -> Self {
        Self {
            builder: self.builder.property("expand", expand),
        }
    }

    /// Whether the widget should grab focus when it is clicked with the mouse.
    ///
    /// This property is only relevant for widgets that can take focus.
    ///
    /// Before 3.20, several widgets (GtkButton, GtkFileChooserButton,
    /// GtkComboBox) implemented this property individually.
    pub fn focus_on_click(self, focus_on_click: bool) -> Self {
        Self {
            builder: self.builder.property("focus-on-click", focus_on_click),
        }
    }

    /// How to distribute horizontal space if widget gets extra space, see [`Align`][crate::Align]
    pub fn halign(self, halign: Align) -> Self {
        Self {
            builder: self.builder.property("halign", halign),
        }
    }

    pub fn has_default(self, has_default: bool) -> Self {
        Self {
            builder: self.builder.property("has-default", has_default),
        }
    }

    pub fn has_focus(self, has_focus: bool) -> Self {
        Self {
            builder: self.builder.property("has-focus", has_focus),
        }
    }

    /// Enables or disables the emission of [`query-tooltip`][struct@crate::Widget#query-tooltip] on `widget`.
    /// A value of [`true`] indicates that `widget` can have a tooltip, in this case
    /// the widget will be queried using [`query-tooltip`][struct@crate::Widget#query-tooltip] to determine
    /// whether it will provide a tooltip or not.
    ///
    /// Note that setting this property to [`true`] for the first time will change
    /// the event masks of the GdkWindows of this widget to include leave-notify
    /// and motion-notify events. This cannot and will not be undone when the
    /// property is set to [`false`] again.
    pub fn has_tooltip(self, has_tooltip: bool) -> Self {
        Self {
            builder: self.builder.property("has-tooltip", has_tooltip),
        }
    }

    pub fn height_request(self, height_request: i32) -> Self {
        Self {
            builder: self.builder.property("height-request", height_request),
        }
    }

    /// Whether to expand horizontally. See [`WidgetExt::set_hexpand()`][crate::prelude::WidgetExt::set_hexpand()].
    pub fn hexpand(self, hexpand: bool) -> Self {
        Self {
            builder: self.builder.property("hexpand", hexpand),
        }
    }

    /// Whether to use the [`hexpand`][struct@crate::Widget#hexpand] property. See [`WidgetExt::is_hexpand_set()`][crate::prelude::WidgetExt::is_hexpand_set()].
    pub fn hexpand_set(self, hexpand_set: bool) -> Self {
        Self {
            builder: self.builder.property("hexpand-set", hexpand_set),
        }
    }

    pub fn is_focus(self, is_focus: bool) -> Self {
        Self {
            builder: self.builder.property("is-focus", is_focus),
        }
    }

    /// Sets all four sides' margin at once. If read, returns max
    /// margin on any side.
    pub fn margin(self, margin: i32) -> Self {
        Self {
            builder: self.builder.property("margin", margin),
        }
    }

    /// Margin on bottom side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_bottom(self, margin_bottom: i32) -> Self {
        Self {
            builder: self.builder.property("margin-bottom", margin_bottom),
        }
    }

    /// Margin on end of widget, horizontally. This property supports
    /// left-to-right and right-to-left text directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_end(self, margin_end: i32) -> Self {
        Self {
            builder: self.builder.property("margin-end", margin_end),
        }
    }

    /// Margin on start of widget, horizontally. This property supports
    /// left-to-right and right-to-left text directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_start(self, margin_start: i32) -> Self {
        Self {
            builder: self.builder.property("margin-start", margin_start),
        }
    }

    /// Margin on top side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_top(self, margin_top: i32) -> Self {
        Self {
            builder: self.builder.property("margin-top", margin_top),
        }
    }

    pub fn name(self, name: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("name", name.into()),
        }
    }

    pub fn no_show_all(self, no_show_all: bool) -> Self {
        Self {
            builder: self.builder.property("no-show-all", no_show_all),
        }
    }

    /// The requested opacity of the widget. See [`WidgetExt::set_opacity()`][crate::prelude::WidgetExt::set_opacity()] for
    /// more details about window opacity.
    ///
    /// Before 3.8 this was only available in GtkWindow
    pub fn opacity(self, opacity: f64) -> Self {
        Self {
            builder: self.builder.property("opacity", opacity),
        }
    }

    pub fn parent(self, parent: &impl IsA<Container>) -> Self {
        Self {
            builder: self.builder.property("parent", parent.clone().upcast()),
        }
    }

    pub fn receives_default(self, receives_default: bool) -> Self {
        Self {
            builder: self.builder.property("receives-default", receives_default),
        }
    }

    pub fn sensitive(self, sensitive: bool) -> Self {
        Self {
            builder: self.builder.property("sensitive", sensitive),
        }
    }

    /// Sets the text of tooltip to be the given string, which is marked up
    /// with the [Pango text markup language][PangoMarkupFormat].
    /// Also see [`Tooltip::set_markup()`][crate::Tooltip::set_markup()].
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]: [`has-tooltip`][struct@crate::Widget#has-tooltip]
    /// will automatically be set to [`true`] and there will be taken care of
    /// [`query-tooltip`][struct@crate::Widget#query-tooltip] in the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and [`tooltip-markup`][struct@crate::Widget#tooltip-markup]
    /// are set, the last one wins.
    pub fn tooltip_markup(self, tooltip_markup: impl Into<glib::GString>) -> Self {
        Self {
            builder: self
                .builder
                .property("tooltip-markup", tooltip_markup.into()),
        }
    }

    /// Sets the text of tooltip to be the given string.
    ///
    /// Also see [`Tooltip::set_text()`][crate::Tooltip::set_text()].
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]: [`has-tooltip`][struct@crate::Widget#has-tooltip]
    /// will automatically be set to [`true`] and there will be taken care of
    /// [`query-tooltip`][struct@crate::Widget#query-tooltip] in the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and [`tooltip-markup`][struct@crate::Widget#tooltip-markup]
    /// are set, the last one wins.
    pub fn tooltip_text(self, tooltip_text: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("tooltip-text", tooltip_text.into()),
        }
    }

    /// How to distribute vertical space if widget gets extra space, see [`Align`][crate::Align]
    pub fn valign(self, valign: Align) -> Self {
        Self {
            builder: self.builder.property("valign", valign),
        }
    }

    /// Whether to expand vertically. See [`WidgetExt::set_vexpand()`][crate::prelude::WidgetExt::set_vexpand()].
    pub fn vexpand(self, vexpand: bool) -> Self {
        Self {
            builder: self.builder.property("vexpand", vexpand),
        }
    }

    /// Whether to use the [`vexpand`][struct@crate::Widget#vexpand] property. See [`WidgetExt::is_vexpand_set()`][crate::prelude::WidgetExt::is_vexpand_set()].
    pub fn vexpand_set(self, vexpand_set: bool) -> Self {
        Self {
            builder: self.builder.property("vexpand-set", vexpand_set),
        }
    }

    pub fn visible(self, visible: bool) -> Self {
        Self {
            builder: self.builder.property("visible", visible),
        }
    }

    pub fn width_request(self, width_request: i32) -> Self {
        Self {
            builder: self.builder.property("width-request", width_request),
        }
    }

    /// Horizontal [`Adjustment`][crate::Adjustment] of the scrollable widget. This adjustment is
    /// shared between the scrollable widget and its parent.
    pub fn hadjustment(self, hadjustment: &impl IsA<Adjustment>) -> Self {
        Self {
            builder: self
                .builder
                .property("hadjustment", hadjustment.clone().upcast()),
        }
    }

    /// Determines whether horizontal scrolling should start once the scrollable
    /// widget is allocated less than its minimum width or less than its natural width.
    pub fn hscroll_policy(self, hscroll_policy: ScrollablePolicy) -> Self {
        Self {
            builder: self.builder.property("hscroll-policy", hscroll_policy),
        }
    }

    /// Verical [`Adjustment`][crate::Adjustment] of the scrollable widget. This adjustment is shared
    /// between the scrollable widget and its parent.
    pub fn vadjustment(self, vadjustment: &impl IsA<Adjustment>) -> Self {
        Self {
            builder: self
                .builder
                .property("vadjustment", vadjustment.clone().upcast()),
        }
    }

    /// Determines whether vertical scrolling should start once the scrollable
    /// widget is allocated less than its minimum height or less than its natural height.
    pub fn vscroll_policy(self, vscroll_policy: ScrollablePolicy) -> Self {
        Self {
            builder: self.builder.property("vscroll-policy", vscroll_policy),
        }
    }

    // rustdoc-stripper-ignore-next
    /// Build the [`TreeView`].
    #[must_use = "Building the object from the builder is usually expensive and is not expected to have side effects"]
    pub fn build(self) -> TreeView {
        self.builder.build()
    }
}

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::TreeView>> Sealed for T {}
}

/// Trait containing all [`struct@TreeView`] methods.
///
/// # Implementors
///
/// [`TreeView`][struct@crate::TreeView]
pub trait TreeViewExt: IsA<TreeView> + sealed::Sealed + 'static {
    /// Appends `column` to the list of columns. If `self` has “fixed_height”
    /// mode enabled, then `column` must have its “sizing” property set to be
    /// GTK_TREE_VIEW_COLUMN_FIXED.
    /// ## `column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to add.
    ///
    /// # Returns
    ///
    /// The number of columns in `self` after appending.
    #[doc(alias = "gtk_tree_view_append_column")]
    fn append_column(&self, column: &impl IsA<TreeViewColumn>) -> i32 {
        unsafe {
            ffi::gtk_tree_view_append_column(
                self.as_ref().to_glib_none().0,
                column.as_ref().to_glib_none().0,
            )
        }
    }

    /// Recursively collapses all visible, expanded nodes in `self`.
    #[doc(alias = "gtk_tree_view_collapse_all")]
    fn collapse_all(&self) {
        unsafe {
            ffi::gtk_tree_view_collapse_all(self.as_ref().to_glib_none().0);
        }
    }

    /// Collapses a row (hides its child rows, if they exist).
    /// ## `path`
    /// path to a row in the `self`
    ///
    /// # Returns
    ///
    /// [`true`] if the row was collapsed.
    #[doc(alias = "gtk_tree_view_collapse_row")]
    fn collapse_row(&self, path: &TreePath) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_collapse_row(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
            ))
        }
    }

    /// Resizes all columns to their optimal width. Only works after the
    /// treeview has been realized.
    #[doc(alias = "gtk_tree_view_columns_autosize")]
    fn columns_autosize(&self) {
        unsafe {
            ffi::gtk_tree_view_columns_autosize(self.as_ref().to_glib_none().0);
        }
    }

    /// Converts bin_window coordinates to coordinates for the
    /// tree (the full scrollable area of the tree).
    /// ## `bx`
    /// X coordinate relative to bin_window
    /// ## `by`
    /// Y coordinate relative to bin_window
    ///
    /// # Returns
    ///
    ///
    /// ## `tx`
    /// return location for tree X coordinate
    ///
    /// ## `ty`
    /// return location for tree Y coordinate
    #[doc(alias = "gtk_tree_view_convert_bin_window_to_tree_coords")]
    fn convert_bin_window_to_tree_coords(&self, bx: i32, by: i32) -> (i32, i32) {
        unsafe {
            let mut tx = mem::MaybeUninit::uninit();
            let mut ty = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_convert_bin_window_to_tree_coords(
                self.as_ref().to_glib_none().0,
                bx,
                by,
                tx.as_mut_ptr(),
                ty.as_mut_ptr(),
            );
            (tx.assume_init(), ty.assume_init())
        }
    }

    /// Converts bin_window coordinates (see [`bin_window()`][Self::bin_window()])
    /// to widget relative coordinates.
    /// ## `bx`
    /// bin_window X coordinate
    /// ## `by`
    /// bin_window Y coordinate
    ///
    /// # Returns
    ///
    ///
    /// ## `wx`
    /// return location for widget X coordinate
    ///
    /// ## `wy`
    /// return location for widget Y coordinate
    #[doc(alias = "gtk_tree_view_convert_bin_window_to_widget_coords")]
    fn convert_bin_window_to_widget_coords(&self, bx: i32, by: i32) -> (i32, i32) {
        unsafe {
            let mut wx = mem::MaybeUninit::uninit();
            let mut wy = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_convert_bin_window_to_widget_coords(
                self.as_ref().to_glib_none().0,
                bx,
                by,
                wx.as_mut_ptr(),
                wy.as_mut_ptr(),
            );
            (wx.assume_init(), wy.assume_init())
        }
    }

    /// Converts tree coordinates (coordinates in full scrollable area of the tree)
    /// to bin_window coordinates.
    /// ## `tx`
    /// tree X coordinate
    /// ## `ty`
    /// tree Y coordinate
    ///
    /// # Returns
    ///
    ///
    /// ## `bx`
    /// return location for X coordinate relative to bin_window
    ///
    /// ## `by`
    /// return location for Y coordinate relative to bin_window
    #[doc(alias = "gtk_tree_view_convert_tree_to_bin_window_coords")]
    fn convert_tree_to_bin_window_coords(&self, tx: i32, ty: i32) -> (i32, i32) {
        unsafe {
            let mut bx = mem::MaybeUninit::uninit();
            let mut by = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_convert_tree_to_bin_window_coords(
                self.as_ref().to_glib_none().0,
                tx,
                ty,
                bx.as_mut_ptr(),
                by.as_mut_ptr(),
            );
            (bx.assume_init(), by.assume_init())
        }
    }

    /// Converts tree coordinates (coordinates in full scrollable area of the tree)
    /// to widget coordinates.
    /// ## `tx`
    /// X coordinate relative to the tree
    /// ## `ty`
    /// Y coordinate relative to the tree
    ///
    /// # Returns
    ///
    ///
    /// ## `wx`
    /// return location for widget X coordinate
    ///
    /// ## `wy`
    /// return location for widget Y coordinate
    #[doc(alias = "gtk_tree_view_convert_tree_to_widget_coords")]
    fn convert_tree_to_widget_coords(&self, tx: i32, ty: i32) -> (i32, i32) {
        unsafe {
            let mut wx = mem::MaybeUninit::uninit();
            let mut wy = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_convert_tree_to_widget_coords(
                self.as_ref().to_glib_none().0,
                tx,
                ty,
                wx.as_mut_ptr(),
                wy.as_mut_ptr(),
            );
            (wx.assume_init(), wy.assume_init())
        }
    }

    /// Converts widget coordinates to coordinates for the bin_window
    /// (see [`bin_window()`][Self::bin_window()]).
    /// ## `wx`
    /// X coordinate relative to the widget
    /// ## `wy`
    /// Y coordinate relative to the widget
    ///
    /// # Returns
    ///
    ///
    /// ## `bx`
    /// return location for bin_window X coordinate
    ///
    /// ## `by`
    /// return location for bin_window Y coordinate
    #[doc(alias = "gtk_tree_view_convert_widget_to_bin_window_coords")]
    fn convert_widget_to_bin_window_coords(&self, wx: i32, wy: i32) -> (i32, i32) {
        unsafe {
            let mut bx = mem::MaybeUninit::uninit();
            let mut by = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_convert_widget_to_bin_window_coords(
                self.as_ref().to_glib_none().0,
                wx,
                wy,
                bx.as_mut_ptr(),
                by.as_mut_ptr(),
            );
            (bx.assume_init(), by.assume_init())
        }
    }

    /// Converts widget coordinates to coordinates for the
    /// tree (the full scrollable area of the tree).
    /// ## `wx`
    /// X coordinate relative to the widget
    /// ## `wy`
    /// Y coordinate relative to the widget
    ///
    /// # Returns
    ///
    ///
    /// ## `tx`
    /// return location for tree X coordinate
    ///
    /// ## `ty`
    /// return location for tree Y coordinate
    #[doc(alias = "gtk_tree_view_convert_widget_to_tree_coords")]
    fn convert_widget_to_tree_coords(&self, wx: i32, wy: i32) -> (i32, i32) {
        unsafe {
            let mut tx = mem::MaybeUninit::uninit();
            let mut ty = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_convert_widget_to_tree_coords(
                self.as_ref().to_glib_none().0,
                wx,
                wy,
                tx.as_mut_ptr(),
                ty.as_mut_ptr(),
            );
            (tx.assume_init(), ty.assume_init())
        }
    }

    /// Creates a [`cairo::Surface`][crate::cairo::Surface] representation of the row at `path`.
    /// This image is used for a drag icon.
    /// ## `path`
    /// a [`TreePath`][crate::TreePath] in `self`
    ///
    /// # Returns
    ///
    /// a newly-allocated surface of the drag icon.
    #[doc(alias = "gtk_tree_view_create_row_drag_icon")]
    fn create_row_drag_icon(&self, path: &TreePath) -> Option<cairo::Surface> {
        unsafe {
            from_glib_full(ffi::gtk_tree_view_create_row_drag_icon(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
            ))
        }
    }

    /// Recursively expands all nodes in the `self`.
    #[doc(alias = "gtk_tree_view_expand_all")]
    fn expand_all(&self) {
        unsafe {
            ffi::gtk_tree_view_expand_all(self.as_ref().to_glib_none().0);
        }
    }

    /// Opens the row so its children are visible.
    /// ## `path`
    /// path to a row
    /// ## `open_all`
    /// whether to recursively expand, or just expand immediate children
    ///
    /// # Returns
    ///
    /// [`true`] if the row existed and had children
    #[doc(alias = "gtk_tree_view_expand_row")]
    fn expand_row(&self, path: &TreePath, open_all: bool) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_expand_row(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                open_all.into_glib(),
            ))
        }
    }

    /// Expands the row at `path`. This will also expand all parent rows of
    /// `path` as necessary.
    /// ## `path`
    /// path to a row.
    #[doc(alias = "gtk_tree_view_expand_to_path")]
    fn expand_to_path(&self, path: &TreePath) {
        unsafe {
            ffi::gtk_tree_view_expand_to_path(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
            );
        }
    }

    /// Gets the setting set by [`set_activate_on_single_click()`][Self::set_activate_on_single_click()].
    ///
    /// # Returns
    ///
    /// [`true`] if row-activated will be emitted on a single click
    #[doc(alias = "gtk_tree_view_get_activate_on_single_click")]
    #[doc(alias = "get_activate_on_single_click")]
    fn activates_on_single_click(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_activate_on_single_click(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Fills the bounding rectangle in bin_window coordinates for the cell at the
    /// row specified by `path` and the column specified by `column`. If `path` is
    /// [`None`], or points to a node not found in the tree, the `y` and `height` fields of
    /// the rectangle will be filled with 0. If `column` is [`None`], the `x` and `width`
    /// fields will be filled with 0. The returned rectangle is equivalent to the
    /// `background_area` passed to [`CellRendererExt::render()`][crate::prelude::CellRendererExt::render()]. These background
    /// areas tile to cover the entire bin window. Contrast with the `cell_area`,
    /// returned by [`cell_area()`][Self::cell_area()], which returns only the cell
    /// itself, excluding surrounding borders and the tree expander area.
    /// ## `path`
    /// a [`TreePath`][crate::TreePath] for the row, or [`None`] to get only horizontal coordinates
    /// ## `column`
    /// a [`TreeViewColumn`][crate::TreeViewColumn] for the column, or [`None`] to get only vertical coordiantes
    ///
    /// # Returns
    ///
    ///
    /// ## `rect`
    /// rectangle to fill with cell background rect
    #[doc(alias = "gtk_tree_view_get_background_area")]
    #[doc(alias = "get_background_area")]
    fn background_area(
        &self,
        path: Option<&TreePath>,
        column: Option<&impl IsA<TreeViewColumn>>,
    ) -> gdk::Rectangle {
        unsafe {
            let mut rect = gdk::Rectangle::uninitialized();
            ffi::gtk_tree_view_get_background_area(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                column.map(|p| p.as_ref()).to_glib_none().0,
                rect.to_glib_none_mut().0,
            );
            rect
        }
    }

    /// Returns the window that `self` renders to.
    /// This is used primarily to compare to `event->window`
    /// to confirm that the event on `self` is on the right window.
    ///
    /// # Returns
    ///
    /// A [`gdk::Window`][crate::gdk::Window], or [`None`] when `self`
    /// hasn’t been realized yet.
    #[doc(alias = "gtk_tree_view_get_bin_window")]
    #[doc(alias = "get_bin_window")]
    fn bin_window(&self) -> Option<gdk::Window> {
        unsafe {
            from_glib_none(ffi::gtk_tree_view_get_bin_window(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Fills the bounding rectangle in bin_window coordinates for the cell at the
    /// row specified by `path` and the column specified by `column`. If `path` is
    /// [`None`], or points to a path not currently displayed, the `y` and `height` fields
    /// of the rectangle will be filled with 0. If `column` is [`None`], the `x` and `width`
    /// fields will be filled with 0. The sum of all cell rects does not cover the
    /// entire tree; there are extra pixels in between rows, for example. The
    /// returned rectangle is equivalent to the `cell_area` passed to
    /// [`CellRendererExt::render()`][crate::prelude::CellRendererExt::render()]. This function is only valid if `self` is
    /// realized.
    /// ## `path`
    /// a [`TreePath`][crate::TreePath] for the row, or [`None`] to get only horizontal coordinates
    /// ## `column`
    /// a [`TreeViewColumn`][crate::TreeViewColumn] for the column, or [`None`] to get only vertical coordinates
    ///
    /// # Returns
    ///
    ///
    /// ## `rect`
    /// rectangle to fill with cell rect
    #[doc(alias = "gtk_tree_view_get_cell_area")]
    #[doc(alias = "get_cell_area")]
    fn cell_area(
        &self,
        path: Option<&TreePath>,
        column: Option<&impl IsA<TreeViewColumn>>,
    ) -> gdk::Rectangle {
        unsafe {
            let mut rect = gdk::Rectangle::uninitialized();
            ffi::gtk_tree_view_get_cell_area(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                column.map(|p| p.as_ref()).to_glib_none().0,
                rect.to_glib_none_mut().0,
            );
            rect
        }
    }

    /// Gets the [`TreeViewColumn`][crate::TreeViewColumn] at the given position in the `tree_view`.
    /// ## `n`
    /// The position of the column, counting from 0.
    ///
    /// # Returns
    ///
    /// The [`TreeViewColumn`][crate::TreeViewColumn], or [`None`] if the
    /// position is outside the range of columns.
    #[doc(alias = "gtk_tree_view_get_column")]
    #[doc(alias = "get_column")]
    fn column(&self, n: i32) -> Option<TreeViewColumn> {
        unsafe {
            from_glib_none(ffi::gtk_tree_view_get_column(
                self.as_ref().to_glib_none().0,
                n,
            ))
        }
    }

    /// Returns a `GList` of all the [`TreeViewColumn`][crate::TreeViewColumn] s currently in `self`.
    /// The returned list must be freed with g_list_free ().
    ///
    /// # Returns
    ///
    /// A list of [`TreeViewColumn`][crate::TreeViewColumn] s
    #[doc(alias = "gtk_tree_view_get_columns")]
    #[doc(alias = "get_columns")]
    fn columns(&self) -> Vec<TreeViewColumn> {
        unsafe {
            FromGlibPtrContainer::from_glib_container(ffi::gtk_tree_view_get_columns(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Fills in `path` and `focus_column` with the current path and focus column. If
    /// the cursor isn’t currently set, then *`path` will be [`None`]. If no column
    /// currently has focus, then *`focus_column` will be [`None`].
    ///
    /// The returned [`TreePath`][crate::TreePath] must be freed with `gtk_tree_path_free()` when
    /// you are done with it.
    ///
    /// # Returns
    ///
    ///
    /// ## `path`
    /// A pointer to be
    ///  filled with the current cursor path, or [`None`]
    ///
    /// ## `focus_column`
    /// A
    ///  pointer to be filled with the current focus column, or [`None`]
    #[doc(alias = "gtk_tree_view_get_cursor")]
    #[doc(alias = "get_cursor")]
    fn cursor(&self) -> (Option<TreePath>, Option<TreeViewColumn>) {
        unsafe {
            let mut path = ptr::null_mut();
            let mut focus_column = ptr::null_mut();
            ffi::gtk_tree_view_get_cursor(
                self.as_ref().to_glib_none().0,
                &mut path,
                &mut focus_column,
            );
            (from_glib_full(path), from_glib_none(focus_column))
        }
    }

    /// Determines the destination row for a given position. `drag_x` and
    /// `drag_y` are expected to be in widget coordinates. This function is only
    /// meaningful if `self` is realized. Therefore this function will always
    /// return [`false`] if `self` is not realized or does not have a model.
    /// ## `drag_x`
    /// the position to determine the destination row for
    /// ## `drag_y`
    /// the position to determine the destination row for
    ///
    /// # Returns
    ///
    /// whether there is a row at the given position, [`true`] if this
    /// is indeed the case.
    ///
    /// ## `path`
    /// Return location for the path of
    ///  the highlighted row, or [`None`].
    ///
    /// ## `pos`
    /// Return location for the drop position, or
    ///  [`None`]
    #[doc(alias = "gtk_tree_view_get_dest_row_at_pos")]
    #[doc(alias = "get_dest_row_at_pos")]
    fn dest_row_at_pos(
        &self,
        drag_x: i32,
        drag_y: i32,
    ) -> Option<(Option<TreePath>, TreeViewDropPosition)> {
        unsafe {
            let mut path = ptr::null_mut();
            let mut pos = mem::MaybeUninit::uninit();
            let ret = from_glib(ffi::gtk_tree_view_get_dest_row_at_pos(
                self.as_ref().to_glib_none().0,
                drag_x,
                drag_y,
                &mut path,
                pos.as_mut_ptr(),
            ));
            if ret {
                Some((from_glib_full(path), from_glib(pos.assume_init())))
            } else {
                None
            }
        }
    }

    /// Gets information about the row that is highlighted for feedback.
    ///
    /// # Returns
    ///
    ///
    /// ## `path`
    /// Return location for the path of the highlighted row, or [`None`].
    ///
    /// ## `pos`
    /// Return location for the drop position, or [`None`]
    #[doc(alias = "gtk_tree_view_get_drag_dest_row")]
    #[doc(alias = "get_drag_dest_row")]
    fn drag_dest_row(&self) -> (Option<TreePath>, TreeViewDropPosition) {
        unsafe {
            let mut path = ptr::null_mut();
            let mut pos = mem::MaybeUninit::uninit();
            ffi::gtk_tree_view_get_drag_dest_row(
                self.as_ref().to_glib_none().0,
                &mut path,
                pos.as_mut_ptr(),
            );
            (from_glib_full(path), from_glib(pos.assume_init()))
        }
    }

    /// Returns whether or not the tree allows to start interactive searching
    /// by typing in text.
    ///
    /// # Returns
    ///
    /// whether or not to let the user search interactively
    #[doc(alias = "gtk_tree_view_get_enable_search")]
    #[doc(alias = "get_enable_search")]
    fn enables_search(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_enable_search(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns whether or not tree lines are drawn in `self`.
    ///
    /// # Returns
    ///
    /// [`true`] if tree lines are drawn in `self`, [`false`]
    /// otherwise.
    #[doc(alias = "gtk_tree_view_get_enable_tree_lines")]
    #[doc(alias = "get_enable_tree_lines")]
    fn enables_tree_lines(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_enable_tree_lines(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns the column that is the current expander column.
    /// This column has the expander arrow drawn next to it.
    ///
    /// # Returns
    ///
    /// The expander column.
    #[doc(alias = "gtk_tree_view_get_expander_column")]
    #[doc(alias = "get_expander_column")]
    fn expander_column(&self) -> Option<TreeViewColumn> {
        unsafe {
            from_glib_none(ffi::gtk_tree_view_get_expander_column(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns whether fixed height mode is turned on for `self`.
    ///
    /// # Returns
    ///
    /// [`true`] if `self` is in fixed height mode
    #[doc(alias = "gtk_tree_view_get_fixed_height_mode")]
    #[doc(alias = "get_fixed_height_mode")]
    fn is_fixed_height_mode(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_fixed_height_mode(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns which grid lines are enabled in `self`.
    ///
    /// # Returns
    ///
    /// a [`TreeViewGridLines`][crate::TreeViewGridLines] value indicating which grid lines
    /// are enabled.
    #[doc(alias = "gtk_tree_view_get_grid_lines")]
    #[doc(alias = "get_grid_lines")]
    fn grid_lines(&self) -> TreeViewGridLines {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_grid_lines(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns whether all header columns are clickable.
    ///
    /// # Returns
    ///
    /// [`true`] if all header columns are clickable, otherwise [`false`]
    #[doc(alias = "gtk_tree_view_get_headers_clickable")]
    #[doc(alias = "get_headers_clickable")]
    fn is_headers_clickable(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_headers_clickable(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns [`true`] if the headers on the `self` are visible.
    ///
    /// # Returns
    ///
    /// Whether the headers are visible or not.
    #[doc(alias = "gtk_tree_view_get_headers_visible")]
    #[doc(alias = "get_headers_visible")]
    fn is_headers_visible(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_headers_visible(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns whether hover expansion mode is turned on for `self`.
    ///
    /// # Returns
    ///
    /// [`true`] if `self` is in hover expansion mode
    #[doc(alias = "gtk_tree_view_get_hover_expand")]
    #[doc(alias = "get_hover_expand")]
    fn hover_expands(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_hover_expand(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns whether hover selection mode is turned on for `self`.
    ///
    /// # Returns
    ///
    /// [`true`] if `self` is in hover selection mode
    #[doc(alias = "gtk_tree_view_get_hover_selection")]
    #[doc(alias = "get_hover_selection")]
    fn is_hover_selection(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_hover_selection(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns the amount, in pixels, of extra indentation for child levels
    /// in `self`.
    ///
    /// # Returns
    ///
    /// the amount of extra indentation for child levels in
    /// `self`. A return value of 0 means that this feature is disabled.
    #[doc(alias = "gtk_tree_view_get_level_indentation")]
    #[doc(alias = "get_level_indentation")]
    fn level_indentation(&self) -> i32 {
        unsafe { ffi::gtk_tree_view_get_level_indentation(self.as_ref().to_glib_none().0) }
    }

    /// Returns the model the [`TreeView`][crate::TreeView] is based on. Returns [`None`] if the
    /// model is unset.
    ///
    /// # Returns
    ///
    /// A [`TreeModel`][crate::TreeModel], or [`None`] if
    /// none is currently being used.
    #[doc(alias = "gtk_tree_view_get_model")]
    #[doc(alias = "get_model")]
    fn model(&self) -> Option<TreeModel> {
        unsafe { from_glib_none(ffi::gtk_tree_view_get_model(self.as_ref().to_glib_none().0)) }
    }

    /// Queries the number of columns in the given `self`.
    ///
    /// # Returns
    ///
    /// The number of columns in the `self`
    #[doc(alias = "gtk_tree_view_get_n_columns")]
    #[doc(alias = "get_n_columns")]
    fn n_columns(&self) -> u32 {
        unsafe { ffi::gtk_tree_view_get_n_columns(self.as_ref().to_glib_none().0) }
    }

    /// Finds the path at the point (`x`, `y`), relative to bin_window coordinates
    /// (please see [`bin_window()`][Self::bin_window()]).
    /// That is, `x` and `y` are relative to an events coordinates. `x` and `y` must
    /// come from an event on the `self` only where `event->window ==
    /// gtk_tree_view_get_bin_window ()`. It is primarily for
    /// things like popup menus. If `path` is non-[`None`], then it will be filled
    /// with the [`TreePath`][crate::TreePath] at that point. This path should be freed with
    /// `gtk_tree_path_free()`. If `column` is non-[`None`], then it will be filled
    /// with the column at that point. `cell_x` and `cell_y` return the coordinates
    /// relative to the cell background (i.e. the `background_area` passed to
    /// [`CellRendererExt::render()`][crate::prelude::CellRendererExt::render()]). This function is only meaningful if
    /// `self` is realized. Therefore this function will always return [`false`]
    /// if `self` is not realized or does not have a model.
    ///
    /// For converting widget coordinates (eg. the ones you get from
    /// GtkWidget::query-tooltip), please see
    /// [`convert_widget_to_bin_window_coords()`][Self::convert_widget_to_bin_window_coords()].
    /// ## `x`
    /// The x position to be identified (relative to bin_window).
    /// ## `y`
    /// The y position to be identified (relative to bin_window).
    ///
    /// # Returns
    ///
    /// [`true`] if a row exists at that coordinate.
    ///
    /// ## `path`
    /// A pointer to a [`TreePath`][crate::TreePath]
    ///  pointer to be filled in, or [`None`]
    ///
    /// ## `column`
    /// A pointer to
    ///  a [`TreeViewColumn`][crate::TreeViewColumn] pointer to be filled in, or [`None`]
    ///
    /// ## `cell_x`
    /// A pointer where the X coordinate
    ///  relative to the cell can be placed, or [`None`]
    ///
    /// ## `cell_y`
    /// A pointer where the Y coordinate
    ///  relative to the cell can be placed, or [`None`]
    #[doc(alias = "gtk_tree_view_get_path_at_pos")]
    #[doc(alias = "get_path_at_pos")]
    fn path_at_pos(
        &self,
        x: i32,
        y: i32,
    ) -> Option<(Option<TreePath>, Option<TreeViewColumn>, i32, i32)> {
        unsafe {
            let mut path = ptr::null_mut();
            let mut column = ptr::null_mut();
            let mut cell_x = mem::MaybeUninit::uninit();
            let mut cell_y = mem::MaybeUninit::uninit();
            let ret = from_glib(ffi::gtk_tree_view_get_path_at_pos(
                self.as_ref().to_glib_none().0,
                x,
                y,
                &mut path,
                &mut column,
                cell_x.as_mut_ptr(),
                cell_y.as_mut_ptr(),
            ));
            if ret {
                Some((
                    from_glib_full(path),
                    from_glib_none(column),
                    cell_x.assume_init(),
                    cell_y.assume_init(),
                ))
            } else {
                None
            }
        }
    }

    /// Retrieves whether the user can reorder the tree via drag-and-drop. See
    /// [`set_reorderable()`][Self::set_reorderable()].
    ///
    /// # Returns
    ///
    /// [`true`] if the tree can be reordered.
    #[doc(alias = "gtk_tree_view_get_reorderable")]
    #[doc(alias = "get_reorderable")]
    fn is_reorderable(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_reorderable(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    //#[doc(alias = "gtk_tree_view_get_row_separator_func")]
    //#[doc(alias = "get_row_separator_func")]
    //fn row_separator_func(&self) -> Option<Box_<dyn Fn(&TreeModel, &TreeIter) -> bool + 'static>> {
    //    unsafe { TODO: call ffi:gtk_tree_view_get_row_separator_func() }
    //}

    /// Returns whether rubber banding is turned on for `self`. If the
    /// selection mode is [`SelectionMode::Multiple`][crate::SelectionMode::Multiple], rubber banding will allow the
    /// user to select multiple rows by dragging the mouse.
    ///
    /// # Returns
    ///
    /// [`true`] if rubber banding in `self` is enabled.
    #[doc(alias = "gtk_tree_view_get_rubber_banding")]
    #[doc(alias = "get_rubber_banding")]
    fn is_rubber_banding(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_rubber_banding(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Gets the column searched on by the interactive search code.
    ///
    /// # Returns
    ///
    /// the column the interactive search code searches in.
    #[doc(alias = "gtk_tree_view_get_search_column")]
    #[doc(alias = "get_search_column")]
    fn search_column(&self) -> i32 {
        unsafe { ffi::gtk_tree_view_get_search_column(self.as_ref().to_glib_none().0) }
    }

    /// Returns the [`Entry`][crate::Entry] which is currently in use as interactive search
    /// entry for `self`. In case the built-in entry is being used, [`None`]
    /// will be returned.
    ///
    /// # Returns
    ///
    /// the entry currently in use as search entry.
    #[doc(alias = "gtk_tree_view_get_search_entry")]
    #[doc(alias = "get_search_entry")]
    fn search_entry(&self) -> Option<Entry> {
        unsafe {
            from_glib_none(ffi::gtk_tree_view_get_search_entry(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    //#[doc(alias = "gtk_tree_view_get_search_equal_func")]
    //#[doc(alias = "get_search_equal_func")]
    //fn search_equal_func(&self) -> Option<Box_<dyn Fn(&TreeModel, i32, &str, &TreeIter) -> bool + 'static>> {
    //    unsafe { TODO: call ffi:gtk_tree_view_get_search_equal_func() }
    //}

    //#[doc(alias = "gtk_tree_view_get_search_position_func")]
    //#[doc(alias = "get_search_position_func")]
    //fn search_position_func(&self) -> Option<Box_<dyn Fn(&TreeView, &Widget) + 'static>> {
    //    unsafe { TODO: call ffi:gtk_tree_view_get_search_position_func() }
    //}

    /// Gets the [`TreeSelection`][crate::TreeSelection] associated with `self`.
    ///
    /// # Returns
    ///
    /// A [`TreeSelection`][crate::TreeSelection] object.
    #[doc(alias = "gtk_tree_view_get_selection")]
    #[doc(alias = "get_selection")]
    fn selection(&self) -> TreeSelection {
        unsafe {
            from_glib_none(ffi::gtk_tree_view_get_selection(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns whether or not expanders are drawn in `self`.
    ///
    /// # Returns
    ///
    /// [`true`] if expanders are drawn in `self`, [`false`]
    /// otherwise.
    #[doc(alias = "gtk_tree_view_get_show_expanders")]
    #[doc(alias = "get_show_expanders")]
    fn shows_expanders(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_get_show_expanders(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns the column of `self`’s model which is being used for
    /// displaying tooltips on `self`’s rows.
    ///
    /// # Returns
    ///
    /// the index of the tooltip column that is currently being
    /// used, or -1 if this is disabled.
    #[doc(alias = "gtk_tree_view_get_tooltip_column")]
    #[doc(alias = "get_tooltip_column")]
    fn tooltip_column(&self) -> i32 {
        unsafe { ffi::gtk_tree_view_get_tooltip_column(self.as_ref().to_glib_none().0) }
    }

    /// This function is supposed to be used in a [`query-tooltip`][struct@crate::Widget#query-tooltip]
    /// signal handler for [`TreeView`][crate::TreeView]. The `x`, `y` and `keyboard_tip` values
    /// which are received in the signal handler, should be passed to this
    /// function without modification.
    ///
    /// The return value indicates whether there is a tree view row at the given
    /// coordinates ([`true`]) or not ([`false`]) for mouse tooltips. For keyboard
    /// tooltips the row returned will be the cursor row. When [`true`], then any of
    /// `model`, `path` and `iter` which have been provided will be set to point to
    /// that row and the corresponding model. `x` and `y` will always be converted
    /// to be relative to `self`’s bin_window if `keyboard_tooltip` is [`false`].
    /// ## `x`
    /// the x coordinate (relative to widget coordinates)
    /// ## `y`
    /// the y coordinate (relative to widget coordinates)
    /// ## `keyboard_tip`
    /// whether this is a keyboard tooltip or not
    ///
    /// # Returns
    ///
    /// whether or not the given tooltip context points to a row.
    ///
    /// ## `model`
    /// a pointer to
    ///  receive a [`TreeModel`][crate::TreeModel] or [`None`]
    ///
    /// ## `path`
    /// a pointer to receive a [`TreePath`][crate::TreePath] or [`None`]
    ///
    /// ## `iter`
    /// a pointer to receive a [`TreeIter`][crate::TreeIter] or [`None`]
    #[doc(alias = "gtk_tree_view_get_tooltip_context")]
    #[doc(alias = "get_tooltip_context")]
    fn tooltip_context(
        &self,
        x: &mut i32,
        y: &mut i32,
        keyboard_tip: bool,
    ) -> Option<(Option<TreeModel>, TreePath, TreeIter)> {
        unsafe {
            let mut model = ptr::null_mut();
            let mut path = ptr::null_mut();
            let mut iter = TreeIter::uninitialized();
            let ret = from_glib(ffi::gtk_tree_view_get_tooltip_context(
                self.as_ref().to_glib_none().0,
                x,
                y,
                keyboard_tip.into_glib(),
                &mut model,
                &mut path,
                iter.to_glib_none_mut().0,
            ));
            if ret {
                Some((from_glib_none(model), from_glib_full(path), iter))
            } else {
                None
            }
        }
    }

    /// Sets `start_path` and `end_path` to be the first and last visible path.
    /// Note that there may be invisible paths in between.
    ///
    /// The paths should be freed with `gtk_tree_path_free()` after use.
    ///
    /// # Returns
    ///
    /// [`true`], if valid paths were placed in `start_path` and `end_path`.
    ///
    /// ## `start_path`
    /// Return location for start of region,
    ///  or [`None`].
    ///
    /// ## `end_path`
    /// Return location for end of region, or [`None`].
    #[doc(alias = "gtk_tree_view_get_visible_range")]
    #[doc(alias = "get_visible_range")]
    fn visible_range(&self) -> Option<(TreePath, TreePath)> {
        unsafe {
            let mut start_path = ptr::null_mut();
            let mut end_path = ptr::null_mut();
            let ret = from_glib(ffi::gtk_tree_view_get_visible_range(
                self.as_ref().to_glib_none().0,
                &mut start_path,
                &mut end_path,
            ));
            if ret {
                Some((from_glib_full(start_path), from_glib_full(end_path)))
            } else {
                None
            }
        }
    }

    /// Fills `visible_rect` with the currently-visible region of the
    /// buffer, in tree coordinates. Convert to bin_window coordinates with
    /// [`convert_tree_to_bin_window_coords()`][Self::convert_tree_to_bin_window_coords()].
    /// Tree coordinates start at 0,0 for row 0 of the tree, and cover the entire
    /// scrollable area of the tree.
    ///
    /// # Returns
    ///
    ///
    /// ## `visible_rect`
    /// rectangle to fill
    #[doc(alias = "gtk_tree_view_get_visible_rect")]
    #[doc(alias = "get_visible_rect")]
    fn visible_rect(&self) -> gdk::Rectangle {
        unsafe {
            let mut visible_rect = gdk::Rectangle::uninitialized();
            ffi::gtk_tree_view_get_visible_rect(
                self.as_ref().to_glib_none().0,
                visible_rect.to_glib_none_mut().0,
            );
            visible_rect
        }
    }

    /// This inserts the `column` into the `self` at `position`. If `position` is
    /// -1, then the column is inserted at the end. If `self` has
    /// “fixed_height” mode enabled, then `column` must have its “sizing” property
    /// set to be GTK_TREE_VIEW_COLUMN_FIXED.
    /// ## `column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to be inserted.
    /// ## `position`
    /// The position to insert `column` in.
    ///
    /// # Returns
    ///
    /// The number of columns in `self` after insertion.
    #[doc(alias = "gtk_tree_view_insert_column")]
    fn insert_column(&self, column: &impl IsA<TreeViewColumn>, position: i32) -> i32 {
        unsafe {
            ffi::gtk_tree_view_insert_column(
                self.as_ref().to_glib_none().0,
                column.as_ref().to_glib_none().0,
                position,
            )
        }
    }

    //#[doc(alias = "gtk_tree_view_insert_column_with_attributes")]
    //fn insert_column_with_attributes(&self, position: i32, title: &str, cell: &impl IsA<CellRenderer>, : /*Unknown conversion*//*Unimplemented*/Basic: VarArgs) -> i32 {
    //    unsafe { TODO: call ffi:gtk_tree_view_insert_column_with_attributes() }
    //}

    /// Convenience function that inserts a new column into the [`TreeView`][crate::TreeView]
    /// with the given cell renderer and a `GtkTreeCellDataFunc` to set cell renderer
    /// attributes (normally using data from the model). See also
    /// [`TreeViewColumnExt::set_cell_data_func()`][crate::prelude::TreeViewColumnExt::set_cell_data_func()], [`TreeViewColumnExt::pack_start()`][crate::prelude::TreeViewColumnExt::pack_start()].
    /// If `self` has “fixed_height” mode enabled, then the new column will have its
    /// “sizing” property set to be GTK_TREE_VIEW_COLUMN_FIXED.
    /// ## `position`
    /// Position to insert, -1 for append
    /// ## `title`
    /// column title
    /// ## `cell`
    /// cell renderer for column
    /// ## `func`
    /// function to set attributes of cell renderer
    ///
    /// # Returns
    ///
    /// number of columns in the tree view post-insert
    #[doc(alias = "gtk_tree_view_insert_column_with_data_func")]
    fn insert_column_with_data_func<
        P: Fn(&TreeViewColumn, &CellRenderer, &TreeModel, &TreeIter) + 'static,
    >(
        &self,
        position: i32,
        title: &str,
        cell: &impl IsA<CellRenderer>,
        func: P,
    ) -> i32 {
        let func_data: Box_<P> = Box_::new(func);
        unsafe extern "C" fn func_func<
            P: Fn(&TreeViewColumn, &CellRenderer, &TreeModel, &TreeIter) + 'static,
        >(
            tree_column: *mut ffi::GtkTreeViewColumn,
            cell: *mut ffi::GtkCellRenderer,
            tree_model: *mut ffi::GtkTreeModel,
            iter: *mut ffi::GtkTreeIter,
            data: glib::ffi::gpointer,
        ) {
            let tree_column = from_glib_borrow(tree_column);
            let cell = from_glib_borrow(cell);
            let tree_model = from_glib_borrow(tree_model);
            let iter = from_glib_borrow(iter);
            let callback: &P = &*(data as *mut _);
            (*callback)(&tree_column, &cell, &tree_model, &iter)
        }
        let func = Some(func_func::<P> as _);
        unsafe extern "C" fn dnotify_func<
            P: Fn(&TreeViewColumn, &CellRenderer, &TreeModel, &TreeIter) + 'static,
        >(
            data: glib::ffi::gpointer,
        ) {
            let _callback: Box_<P> = Box_::from_raw(data as *mut _);
        }
        let destroy_call6 = Some(dnotify_func::<P> as _);
        let super_callback0: Box_<P> = func_data;
        unsafe {
            ffi::gtk_tree_view_insert_column_with_data_func(
                self.as_ref().to_glib_none().0,
                position,
                title.to_glib_none().0,
                cell.as_ref().to_glib_none().0,
                func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call6,
            )
        }
    }

    /// Determine whether the point (`x`, `y`) in `self` is blank, that is no
    /// cell content nor an expander arrow is drawn at the location. If so, the
    /// location can be considered as the background. You might wish to take
    /// special action on clicks on the background, such as clearing a current
    /// selection, having a custom context menu or starting rubber banding.
    ///
    /// The `x` and `y` coordinate that are provided must be relative to bin_window
    /// coordinates. That is, `x` and `y` must come from an event on `self`
    /// where `event->window == gtk_tree_view_get_bin_window ()`.
    ///
    /// For converting widget coordinates (eg. the ones you get from
    /// GtkWidget::query-tooltip), please see
    /// [`convert_widget_to_bin_window_coords()`][Self::convert_widget_to_bin_window_coords()].
    ///
    /// The `path`, `column`, `cell_x` and `cell_y` arguments will be filled in
    /// likewise as for [`path_at_pos()`][Self::path_at_pos()]. Please see
    /// [`path_at_pos()`][Self::path_at_pos()] for more information.
    /// ## `x`
    /// The x position to be identified (relative to bin_window)
    /// ## `y`
    /// The y position to be identified (relative to bin_window)
    ///
    /// # Returns
    ///
    /// [`true`] if the area at the given coordinates is blank,
    /// [`false`] otherwise.
    ///
    /// ## `path`
    /// A pointer to a [`TreePath`][crate::TreePath] pointer to
    ///  be filled in, or [`None`]
    ///
    /// ## `column`
    /// A pointer to a
    ///  [`TreeViewColumn`][crate::TreeViewColumn] pointer to be filled in, or [`None`]
    ///
    /// ## `cell_x`
    /// A pointer where the X coordinate relative to the
    ///  cell can be placed, or [`None`]
    ///
    /// ## `cell_y`
    /// A pointer where the Y coordinate relative to the
    ///  cell can be placed, or [`None`]
    #[doc(alias = "gtk_tree_view_is_blank_at_pos")]
    fn is_blank_at_pos(
        &self,
        x: i32,
        y: i32,
    ) -> Option<(Option<TreePath>, Option<TreeViewColumn>, i32, i32)> {
        unsafe {
            let mut path = ptr::null_mut();
            let mut column = ptr::null_mut();
            let mut cell_x = mem::MaybeUninit::uninit();
            let mut cell_y = mem::MaybeUninit::uninit();
            let ret = from_glib(ffi::gtk_tree_view_is_blank_at_pos(
                self.as_ref().to_glib_none().0,
                x,
                y,
                &mut path,
                &mut column,
                cell_x.as_mut_ptr(),
                cell_y.as_mut_ptr(),
            ));
            if ret {
                Some((
                    from_glib_full(path),
                    from_glib_none(column),
                    cell_x.assume_init(),
                    cell_y.assume_init(),
                ))
            } else {
                None
            }
        }
    }

    /// Returns whether a rubber banding operation is currently being done
    /// in `self`.
    ///
    /// # Returns
    ///
    /// [`true`] if a rubber banding operation is currently being
    /// done in `self`.
    #[doc(alias = "gtk_tree_view_is_rubber_banding_active")]
    fn is_rubber_banding_active(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_is_rubber_banding_active(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Calls `func` on all expanded rows.
    /// ## `func`
    /// A function to be called
    #[doc(alias = "gtk_tree_view_map_expanded_rows")]
    fn map_expanded_rows<P: FnMut(&TreeView, &TreePath)>(&self, func: P) {
        let func_data: P = func;
        unsafe extern "C" fn func_func<P: FnMut(&TreeView, &TreePath)>(
            tree_view: *mut ffi::GtkTreeView,
            path: *mut ffi::GtkTreePath,
            user_data: glib::ffi::gpointer,
        ) {
            let tree_view = from_glib_borrow(tree_view);
            let path = from_glib_borrow(path);
            let callback: *mut P = user_data as *const _ as usize as *mut P;
            (*callback)(&tree_view, &path)
        }
        let func = Some(func_func::<P> as _);
        let super_callback0: &P = &func_data;
        unsafe {
            ffi::gtk_tree_view_map_expanded_rows(
                self.as_ref().to_glib_none().0,
                func,
                super_callback0 as *const _ as usize as *mut _,
            );
        }
    }

    /// Moves `column` to be after to `base_column`. If `base_column` is [`None`], then
    /// `column` is placed in the first position.
    /// ## `column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to be moved.
    /// ## `base_column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to be moved relative to, or [`None`].
    #[doc(alias = "gtk_tree_view_move_column_after")]
    fn move_column_after(
        &self,
        column: &impl IsA<TreeViewColumn>,
        base_column: Option<&impl IsA<TreeViewColumn>>,
    ) {
        unsafe {
            ffi::gtk_tree_view_move_column_after(
                self.as_ref().to_glib_none().0,
                column.as_ref().to_glib_none().0,
                base_column.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Removes `column` from `self`.
    /// ## `column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to remove.
    ///
    /// # Returns
    ///
    /// The number of columns in `self` after removing.
    #[doc(alias = "gtk_tree_view_remove_column")]
    fn remove_column(&self, column: &impl IsA<TreeViewColumn>) -> i32 {
        unsafe {
            ffi::gtk_tree_view_remove_column(
                self.as_ref().to_glib_none().0,
                column.as_ref().to_glib_none().0,
            )
        }
    }

    /// Activates the cell determined by `path` and `column`.
    /// ## `path`
    /// The [`TreePath`][crate::TreePath] to be activated.
    /// ## `column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to be activated.
    #[doc(alias = "gtk_tree_view_row_activated")]
    fn row_activated(&self, path: &TreePath, column: &impl IsA<TreeViewColumn>) {
        unsafe {
            ffi::gtk_tree_view_row_activated(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                column.as_ref().to_glib_none().0,
            );
        }
    }

    /// Returns [`true`] if the node pointed to by `path` is expanded in `self`.
    /// ## `path`
    /// A [`TreePath`][crate::TreePath] to test expansion state.
    ///
    /// # Returns
    ///
    /// [`true`] if `path` is expanded.
    #[doc(alias = "gtk_tree_view_row_expanded")]
    fn row_expanded(&self, path: &TreePath) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_view_row_expanded(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
            ))
        }
    }

    /// Moves the alignments of `self` to the position specified by `column` and
    /// `path`. If `column` is [`None`], then no horizontal scrolling occurs. Likewise,
    /// if `path` is [`None`] no vertical scrolling occurs. At a minimum, one of `column`
    /// or `path` need to be non-[`None`]. `row_align` determines where the row is
    /// placed, and `col_align` determines where `column` is placed. Both are expected
    /// to be between 0.0 and 1.0. 0.0 means left/top alignment, 1.0 means
    /// right/bottom alignment, 0.5 means center.
    ///
    /// If `use_align` is [`false`], then the alignment arguments are ignored, and the
    /// tree does the minimum amount of work to scroll the cell onto the screen.
    /// This means that the cell will be scrolled to the edge closest to its current
    /// position. If the cell is currently visible on the screen, nothing is done.
    ///
    /// This function only works if the model is set, and `path` is a valid row on the
    /// model. If the model changes before the `self` is realized, the centered
    /// path will be modified to reflect this change.
    /// ## `path`
    /// The path of the row to move to, or [`None`].
    /// ## `column`
    /// The [`TreeViewColumn`][crate::TreeViewColumn] to move horizontally to, or [`None`].
    /// ## `use_align`
    /// whether to use alignment arguments, or [`false`].
    /// ## `row_align`
    /// The vertical alignment of the row specified by `path`.
    /// ## `col_align`
    /// The horizontal alignment of the column specified by `column`.
    #[doc(alias = "gtk_tree_view_scroll_to_cell")]
    fn scroll_to_cell(
        &self,
        path: Option<&TreePath>,
        column: Option<&impl IsA<TreeViewColumn>>,
        use_align: bool,
        row_align: f32,
        col_align: f32,
    ) {
        unsafe {
            ffi::gtk_tree_view_scroll_to_cell(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                column.map(|p| p.as_ref()).to_glib_none().0,
                use_align.into_glib(),
                row_align,
                col_align,
            );
        }
    }

    /// Scrolls the tree view such that the top-left corner of the visible
    /// area is `tree_x`, `tree_y`, where `tree_x` and `tree_y` are specified
    /// in tree coordinates. The `self` must be realized before
    /// this function is called. If it isn't, you probably want to be
    /// using [`scroll_to_cell()`][Self::scroll_to_cell()].
    ///
    /// If either `tree_x` or `tree_y` are -1, then that direction isn’t scrolled.
    /// ## `tree_x`
    /// X coordinate of new top-left pixel of visible area, or -1
    /// ## `tree_y`
    /// Y coordinate of new top-left pixel of visible area, or -1
    #[doc(alias = "gtk_tree_view_scroll_to_point")]
    fn scroll_to_point(&self, tree_x: i32, tree_y: i32) {
        unsafe {
            ffi::gtk_tree_view_scroll_to_point(self.as_ref().to_glib_none().0, tree_x, tree_y);
        }
    }

    /// Cause the [`row-activated`][struct@crate::TreeView#row-activated] signal to be emitted
    /// on a single click instead of a double click.
    /// ## `single`
    /// [`true`] to emit row-activated on a single click
    #[doc(alias = "gtk_tree_view_set_activate_on_single_click")]
    fn set_activate_on_single_click(&self, single: bool) {
        unsafe {
            ffi::gtk_tree_view_set_activate_on_single_click(
                self.as_ref().to_glib_none().0,
                single.into_glib(),
            );
        }
    }

    /// Sets a user function for determining where a column may be dropped when
    /// dragged. This function is called on every column pair in turn at the
    /// beginning of a column drag to determine where a drop can take place. The
    /// arguments passed to `func` are: the `self`, the [`TreeViewColumn`][crate::TreeViewColumn] being
    /// dragged, the two [`TreeViewColumn`][crate::TreeViewColumn] s determining the drop spot, and
    /// `user_data`. If either of the [`TreeViewColumn`][crate::TreeViewColumn] arguments for the drop spot
    /// are [`None`], then they indicate an edge. If `func` is set to be [`None`], then
    /// `self` reverts to the default behavior of allowing all columns to be
    /// dropped everywhere.
    /// ## `func`
    /// A function to determine which columns are reorderable, or [`None`].
    #[doc(alias = "gtk_tree_view_set_column_drag_function")]
    fn set_column_drag_function(
        &self,
        func: Option<
            Box_<
                dyn Fn(&TreeView, &TreeViewColumn, &TreeViewColumn, &TreeViewColumn) -> bool
                    + 'static,
            >,
        >,
    ) {
        let func_data: Box_<
            Option<
                Box_<
                    dyn Fn(&TreeView, &TreeViewColumn, &TreeViewColumn, &TreeViewColumn) -> bool
                        + 'static,
                >,
            >,
        > = Box_::new(func);
        unsafe extern "C" fn func_func(
            tree_view: *mut ffi::GtkTreeView,
            column: *mut ffi::GtkTreeViewColumn,
            prev_column: *mut ffi::GtkTreeViewColumn,
            next_column: *mut ffi::GtkTreeViewColumn,
            data: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let tree_view = from_glib_borrow(tree_view);
            let column = from_glib_borrow(column);
            let prev_column = from_glib_borrow(prev_column);
            let next_column = from_glib_borrow(next_column);
            let callback: &Option<
                Box_<
                    dyn Fn(&TreeView, &TreeViewColumn, &TreeViewColumn, &TreeViewColumn) -> bool
                        + 'static,
                >,
            > = &*(data as *mut _);
            if let Some(ref callback) = *callback {
                callback(&tree_view, &column, &prev_column, &next_column)
            } else {
                panic!("cannot get closure...")
            }
            .into_glib()
        }
        let func = if func_data.is_some() {
            Some(func_func as _)
        } else {
            None
        };
        unsafe extern "C" fn destroy_func(data: glib::ffi::gpointer) {
            let _callback: Box_<
                Option<
                    Box_<
                        dyn Fn(&TreeView, &TreeViewColumn, &TreeViewColumn, &TreeViewColumn) -> bool
                            + 'static,
                    >,
                >,
            > = Box_::from_raw(data as *mut _);
        }
        let destroy_call3 = Some(destroy_func as _);
        let super_callback0: Box_<
            Option<
                Box_<
                    dyn Fn(&TreeView, &TreeViewColumn, &TreeViewColumn, &TreeViewColumn) -> bool
                        + 'static,
                >,
            >,
        > = func_data;
        unsafe {
            ffi::gtk_tree_view_set_column_drag_function(
                self.as_ref().to_glib_none().0,
                func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call3,
            );
        }
    }

    /// Sets the current keyboard focus to be at `path`, and selects it. This is
    /// useful when you want to focus the user’s attention on a particular row. If
    /// `focus_column` is not [`None`], then focus is given to the column specified by
    /// it. Additionally, if `focus_column` is specified, and `start_editing` is
    /// [`true`], then editing should be started in the specified cell.
    /// This function is often followed by [`WidgetExt::grab_focus()`][crate::prelude::WidgetExt::grab_focus()] (`self`)
    /// in order to give keyboard focus to the widget. Please note that editing
    /// can only happen when the widget is realized.
    ///
    /// If `path` is invalid for `model`, the current cursor (if any) will be unset
    /// and the function will return without failing.
    /// ## `path`
    /// A [`TreePath`][crate::TreePath]
    /// ## `focus_column`
    /// A [`TreeViewColumn`][crate::TreeViewColumn], or [`None`]
    /// ## `start_editing`
    /// [`true`] if the specified cell should start being edited.
    #[doc(alias = "gtk_tree_view_set_cursor")]
    fn set_cursor(
        &self,
        path: &TreePath,
        focus_column: Option<&impl IsA<TreeViewColumn>>,
        start_editing: bool,
    ) {
        unsafe {
            ffi::gtk_tree_view_set_cursor(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                focus_column.map(|p| p.as_ref()).to_glib_none().0,
                start_editing.into_glib(),
            );
        }
    }

    /// Sets the current keyboard focus to be at `path`, and selects it. This is
    /// useful when you want to focus the user’s attention on a particular row. If
    /// `focus_column` is not [`None`], then focus is given to the column specified by
    /// it. If `focus_column` and `focus_cell` are not [`None`], and `focus_column`
    /// contains 2 or more editable or activatable cells, then focus is given to
    /// the cell specified by `focus_cell`. Additionally, if `focus_column` is
    /// specified, and `start_editing` is [`true`], then editing should be started in
    /// the specified cell. This function is often followed by
    /// [`WidgetExt::grab_focus()`][crate::prelude::WidgetExt::grab_focus()] (`self`) in order to give keyboard focus to the
    /// widget. Please note that editing can only happen when the widget is
    /// realized.
    ///
    /// If `path` is invalid for `model`, the current cursor (if any) will be unset
    /// and the function will return without failing.
    /// ## `path`
    /// A [`TreePath`][crate::TreePath]
    /// ## `focus_column`
    /// A [`TreeViewColumn`][crate::TreeViewColumn], or [`None`]
    /// ## `focus_cell`
    /// A [`CellRenderer`][crate::CellRenderer], or [`None`]
    /// ## `start_editing`
    /// [`true`] if the specified cell should start being edited.
    #[doc(alias = "gtk_tree_view_set_cursor_on_cell")]
    fn set_cursor_on_cell(
        &self,
        path: &TreePath,
        focus_column: Option<&impl IsA<TreeViewColumn>>,
        focus_cell: Option<&impl IsA<CellRenderer>>,
        start_editing: bool,
    ) {
        unsafe {
            ffi::gtk_tree_view_set_cursor_on_cell(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                focus_column.map(|p| p.as_ref()).to_glib_none().0,
                focus_cell.map(|p| p.as_ref()).to_glib_none().0,
                start_editing.into_glib(),
            );
        }
    }

    /// Sets the row that is highlighted for feedback.
    /// If `path` is [`None`], an existing highlight is removed.
    /// ## `path`
    /// The path of the row to highlight, or [`None`]
    /// ## `pos`
    /// Specifies whether to drop before, after or into the row
    #[doc(alias = "gtk_tree_view_set_drag_dest_row")]
    fn set_drag_dest_row(&self, path: Option<&TreePath>, pos: TreeViewDropPosition) {
        unsafe {
            ffi::gtk_tree_view_set_drag_dest_row(
                self.as_ref().to_glib_none().0,
                mut_override(path.to_glib_none().0),
                pos.into_glib(),
            );
        }
    }

    /// If `enable_search` is set, then the user can type in text to search through
    /// the tree interactively (this is sometimes called "typeahead find").
    ///
    /// Note that even if this is [`false`], the user can still initiate a search
    /// using the “start-interactive-search” key binding.
    /// ## `enable_search`
    /// [`true`], if the user can search interactively
    #[doc(alias = "gtk_tree_view_set_enable_search")]
    fn set_enable_search(&self, enable_search: bool) {
        unsafe {
            ffi::gtk_tree_view_set_enable_search(
                self.as_ref().to_glib_none().0,
                enable_search.into_glib(),
            );
        }
    }

    /// Sets whether to draw lines interconnecting the expanders in `self`.
    /// This does not have any visible effects for lists.
    /// ## `enabled`
    /// [`true`] to enable tree line drawing, [`false`] otherwise.
    #[doc(alias = "gtk_tree_view_set_enable_tree_lines")]
    fn set_enable_tree_lines(&self, enabled: bool) {
        unsafe {
            ffi::gtk_tree_view_set_enable_tree_lines(
                self.as_ref().to_glib_none().0,
                enabled.into_glib(),
            );
        }
    }

    /// Sets the column to draw the expander arrow at. It must be in `self`.
    /// If `column` is [`None`], then the expander arrow is always at the first
    /// visible column.
    ///
    /// If you do not want expander arrow to appear in your tree, set the
    /// expander column to a hidden column.
    /// ## `column`
    /// [`None`], or the column to draw the expander arrow at.
    #[doc(alias = "gtk_tree_view_set_expander_column")]
    fn set_expander_column(&self, column: Option<&impl IsA<TreeViewColumn>>) {
        unsafe {
            ffi::gtk_tree_view_set_expander_column(
                self.as_ref().to_glib_none().0,
                column.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Enables or disables the fixed height mode of `self`.
    /// Fixed height mode speeds up [`TreeView`][crate::TreeView] by assuming that all
    /// rows have the same height.
    /// Only enable this option if all rows are the same height and all
    /// columns are of type [`TreeViewColumnSizing::Fixed`][crate::TreeViewColumnSizing::Fixed].
    /// ## `enable`
    /// [`true`] to enable fixed height mode
    #[doc(alias = "gtk_tree_view_set_fixed_height_mode")]
    fn set_fixed_height_mode(&self, enable: bool) {
        unsafe {
            ffi::gtk_tree_view_set_fixed_height_mode(
                self.as_ref().to_glib_none().0,
                enable.into_glib(),
            );
        }
    }

    /// Sets which grid lines to draw in `self`.
    /// ## `grid_lines`
    /// a [`TreeViewGridLines`][crate::TreeViewGridLines] value indicating which grid lines to
    /// enable.
    #[doc(alias = "gtk_tree_view_set_grid_lines")]
    fn set_grid_lines(&self, grid_lines: TreeViewGridLines) {
        unsafe {
            ffi::gtk_tree_view_set_grid_lines(
                self.as_ref().to_glib_none().0,
                grid_lines.into_glib(),
            );
        }
    }

    /// Allow the column title buttons to be clicked.
    /// ## `setting`
    /// [`true`] if the columns are clickable.
    #[doc(alias = "gtk_tree_view_set_headers_clickable")]
    fn set_headers_clickable(&self, setting: bool) {
        unsafe {
            ffi::gtk_tree_view_set_headers_clickable(
                self.as_ref().to_glib_none().0,
                setting.into_glib(),
            );
        }
    }

    /// Sets the visibility state of the headers.
    /// ## `headers_visible`
    /// [`true`] if the headers are visible
    #[doc(alias = "gtk_tree_view_set_headers_visible")]
    fn set_headers_visible(&self, headers_visible: bool) {
        unsafe {
            ffi::gtk_tree_view_set_headers_visible(
                self.as_ref().to_glib_none().0,
                headers_visible.into_glib(),
            );
        }
    }

    /// Enables or disables the hover expansion mode of `self`.
    /// Hover expansion makes rows expand or collapse if the pointer
    /// moves over them.
    /// ## `expand`
    /// [`true`] to enable hover selection mode
    #[doc(alias = "gtk_tree_view_set_hover_expand")]
    fn set_hover_expand(&self, expand: bool) {
        unsafe {
            ffi::gtk_tree_view_set_hover_expand(self.as_ref().to_glib_none().0, expand.into_glib());
        }
    }

    /// Enables or disables the hover selection mode of `self`.
    /// Hover selection makes the selected row follow the pointer.
    /// Currently, this works only for the selection modes
    /// [`SelectionMode::Single`][crate::SelectionMode::Single] and [`SelectionMode::Browse`][crate::SelectionMode::Browse].
    /// ## `hover`
    /// [`true`] to enable hover selection mode
    #[doc(alias = "gtk_tree_view_set_hover_selection")]
    fn set_hover_selection(&self, hover: bool) {
        unsafe {
            ffi::gtk_tree_view_set_hover_selection(
                self.as_ref().to_glib_none().0,
                hover.into_glib(),
            );
        }
    }

    /// Sets the amount of extra indentation for child levels to use in `self`
    /// in addition to the default indentation. The value should be specified in
    /// pixels, a value of 0 disables this feature and in this case only the default
    /// indentation will be used.
    /// This does not have any visible effects for lists.
    /// ## `indentation`
    /// the amount, in pixels, of extra indentation in `self`.
    #[doc(alias = "gtk_tree_view_set_level_indentation")]
    fn set_level_indentation(&self, indentation: i32) {
        unsafe {
            ffi::gtk_tree_view_set_level_indentation(self.as_ref().to_glib_none().0, indentation);
        }
    }

    /// Sets the model for a [`TreeView`][crate::TreeView]. If the `self` already has a model
    /// set, it will remove it before setting the new model. If `model` is [`None`],
    /// then it will unset the old model.
    /// ## `model`
    /// The model.
    #[doc(alias = "gtk_tree_view_set_model")]
    fn set_model(&self, model: Option<&impl IsA<TreeModel>>) {
        unsafe {
            ffi::gtk_tree_view_set_model(
                self.as_ref().to_glib_none().0,
                model.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// This function is a convenience function to allow you to reorder
    /// models that support the `GtkTreeDragSourceIface` and the
    /// `GtkTreeDragDestIface`. Both [`TreeStore`][crate::TreeStore] and [`ListStore`][crate::ListStore] support
    /// these. If `reorderable` is [`true`], then the user can reorder the
    /// model by dragging and dropping rows. The developer can listen to
    /// these changes by connecting to the model’s [`row-inserted`][struct@crate::TreeModel#row-inserted]
    /// and [`row-deleted`][struct@crate::TreeModel#row-deleted] signals. The reordering is implemented
    /// by setting up the tree view as a drag source and destination.
    /// Therefore, drag and drop can not be used in a reorderable view for any
    /// other purpose.
    ///
    /// This function does not give you any degree of control over the order -- any
    /// reordering is allowed. If more control is needed, you should probably
    /// handle drag and drop manually.
    /// ## `reorderable`
    /// [`true`], if the tree can be reordered.
    #[doc(alias = "gtk_tree_view_set_reorderable")]
    fn set_reorderable(&self, reorderable: bool) {
        unsafe {
            ffi::gtk_tree_view_set_reorderable(
                self.as_ref().to_glib_none().0,
                reorderable.into_glib(),
            );
        }
    }

    /// Sets the row separator function, which is used to determine
    /// whether a row should be drawn as a separator. If the row separator
    /// function is [`None`], no separators are drawn. This is the default value.
    /// ## `func`
    /// a `GtkTreeViewRowSeparatorFunc`
    #[doc(alias = "gtk_tree_view_set_row_separator_func")]
    fn set_row_separator_func(
        &self,
        func: Option<Box_<dyn Fn(&TreeModel, &TreeIter) -> bool + 'static>>,
    ) {
        let func_data: Box_<Option<Box_<dyn Fn(&TreeModel, &TreeIter) -> bool + 'static>>> =
            Box_::new(func);
        unsafe extern "C" fn func_func(
            model: *mut ffi::GtkTreeModel,
            iter: *mut ffi::GtkTreeIter,
            data: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let model = from_glib_borrow(model);
            let iter = from_glib_borrow(iter);
            let callback: &Option<Box_<dyn Fn(&TreeModel, &TreeIter) -> bool + 'static>> =
                &*(data as *mut _);
            if let Some(ref callback) = *callback {
                callback(&model, &iter)
            } else {
                panic!("cannot get closure...")
            }
            .into_glib()
        }
        let func = if func_data.is_some() {
            Some(func_func as _)
        } else {
            None
        };
        unsafe extern "C" fn destroy_func(data: glib::ffi::gpointer) {
            let _callback: Box_<Option<Box_<dyn Fn(&TreeModel, &TreeIter) -> bool + 'static>>> =
                Box_::from_raw(data as *mut _);
        }
        let destroy_call3 = Some(destroy_func as _);
        let super_callback0: Box_<Option<Box_<dyn Fn(&TreeModel, &TreeIter) -> bool + 'static>>> =
            func_data;
        unsafe {
            ffi::gtk_tree_view_set_row_separator_func(
                self.as_ref().to_glib_none().0,
                func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call3,
            );
        }
    }

    /// Enables or disables rubber banding in `self`. If the selection mode
    /// is [`SelectionMode::Multiple`][crate::SelectionMode::Multiple], rubber banding will allow the user to select
    /// multiple rows by dragging the mouse.
    /// ## `enable`
    /// [`true`] to enable rubber banding
    #[doc(alias = "gtk_tree_view_set_rubber_banding")]
    fn set_rubber_banding(&self, enable: bool) {
        unsafe {
            ffi::gtk_tree_view_set_rubber_banding(
                self.as_ref().to_glib_none().0,
                enable.into_glib(),
            );
        }
    }

    /// Sets `column` as the column where the interactive search code should
    /// search in for the current model.
    ///
    /// If the search column is set, users can use the “start-interactive-search”
    /// key binding to bring up search popup. The enable-search property controls
    /// whether simply typing text will also start an interactive search.
    ///
    /// Note that `column` refers to a column of the current model. The search
    /// column is reset to -1 when the model is changed.
    /// ## `column`
    /// the column of the model to search in, or -1 to disable searching
    #[doc(alias = "gtk_tree_view_set_search_column")]
    fn set_search_column(&self, column: i32) {
        unsafe {
            ffi::gtk_tree_view_set_search_column(self.as_ref().to_glib_none().0, column);
        }
    }

    /// Sets the entry which the interactive search code will use for this
    /// `self`. This is useful when you want to provide a search entry
    /// in our interface at all time at a fixed position. Passing [`None`] for
    /// `entry` will make the interactive search code use the built-in popup
    /// entry again.
    /// ## `entry`
    /// the entry the interactive search code of `self` should use or [`None`]
    #[doc(alias = "gtk_tree_view_set_search_entry")]
    fn set_search_entry(&self, entry: Option<&impl IsA<Entry>>) {
        unsafe {
            ffi::gtk_tree_view_set_search_entry(
                self.as_ref().to_glib_none().0,
                entry.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets the compare function for the interactive search capabilities; note
    /// that somewhat like `strcmp()` returning 0 for equality
    /// `GtkTreeViewSearchEqualFunc` returns [`false`] on matches.
    /// ## `search_equal_func`
    /// the compare function to use during the search
    /// ## `search_user_data`
    /// user data to pass to `search_equal_func`, or [`None`]
    /// ## `search_destroy`
    /// Destroy notifier for `search_user_data`, or [`None`]
    #[doc(alias = "gtk_tree_view_set_search_equal_func")]
    fn set_search_equal_func<P: Fn(&TreeModel, i32, &str, &TreeIter) -> bool + 'static>(
        &self,
        search_equal_func: P,
    ) {
        let search_equal_func_data: Box_<P> = Box_::new(search_equal_func);
        unsafe extern "C" fn search_equal_func_func<
            P: Fn(&TreeModel, i32, &str, &TreeIter) -> bool + 'static,
        >(
            model: *mut ffi::GtkTreeModel,
            column: libc::c_int,
            key: *const libc::c_char,
            iter: *mut ffi::GtkTreeIter,
            search_data: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let model = from_glib_borrow(model);
            let key: Borrowed<glib::GString> = from_glib_borrow(key);
            let iter = from_glib_borrow(iter);
            let callback: &P = &*(search_data as *mut _);
            (*callback)(&model, column, key.as_str(), &iter).into_glib()
        }
        let search_equal_func = Some(search_equal_func_func::<P> as _);
        unsafe extern "C" fn search_destroy_func<
            P: Fn(&TreeModel, i32, &str, &TreeIter) -> bool + 'static,
        >(
            data: glib::ffi::gpointer,
        ) {
            let _callback: Box_<P> = Box_::from_raw(data as *mut _);
        }
        let destroy_call3 = Some(search_destroy_func::<P> as _);
        let super_callback0: Box_<P> = search_equal_func_data;
        unsafe {
            ffi::gtk_tree_view_set_search_equal_func(
                self.as_ref().to_glib_none().0,
                search_equal_func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call3,
            );
        }
    }

    /// Sets the function to use when positioning the search dialog.
    /// ## `func`
    /// the function to use to position the search dialog, or [`None`]
    ///  to use the default search position function
    #[doc(alias = "gtk_tree_view_set_search_position_func")]
    fn set_search_position_func(&self, func: Option<Box_<dyn Fn(&TreeView, &Widget) + 'static>>) {
        let func_data: Box_<Option<Box_<dyn Fn(&TreeView, &Widget) + 'static>>> = Box_::new(func);
        unsafe extern "C" fn func_func(
            tree_view: *mut ffi::GtkTreeView,
            search_dialog: *mut ffi::GtkWidget,
            user_data: glib::ffi::gpointer,
        ) {
            let tree_view = from_glib_borrow(tree_view);
            let search_dialog = from_glib_borrow(search_dialog);
            let callback: &Option<Box_<dyn Fn(&TreeView, &Widget) + 'static>> =
                &*(user_data as *mut _);
            if let Some(ref callback) = *callback {
                callback(&tree_view, &search_dialog)
            } else {
                panic!("cannot get closure...")
            }
        }
        let func = if func_data.is_some() {
            Some(func_func as _)
        } else {
            None
        };
        unsafe extern "C" fn destroy_func(data: glib::ffi::gpointer) {
            let _callback: Box_<Option<Box_<dyn Fn(&TreeView, &Widget) + 'static>>> =
                Box_::from_raw(data as *mut _);
        }
        let destroy_call3 = Some(destroy_func as _);
        let super_callback0: Box_<Option<Box_<dyn Fn(&TreeView, &Widget) + 'static>>> = func_data;
        unsafe {
            ffi::gtk_tree_view_set_search_position_func(
                self.as_ref().to_glib_none().0,
                func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call3,
            );
        }
    }

    /// Sets whether to draw and enable expanders and indent child rows in
    /// `self`. When disabled there will be no expanders visible in trees
    /// and there will be no way to expand and collapse rows by default. Also
    /// note that hiding the expanders will disable the default indentation. You
    /// can set a custom indentation in this case using
    /// [`set_level_indentation()`][Self::set_level_indentation()].
    /// This does not have any visible effects for lists.
    /// ## `enabled`
    /// [`true`] to enable expander drawing, [`false`] otherwise.
    #[doc(alias = "gtk_tree_view_set_show_expanders")]
    fn set_show_expanders(&self, enabled: bool) {
        unsafe {
            ffi::gtk_tree_view_set_show_expanders(
                self.as_ref().to_glib_none().0,
                enabled.into_glib(),
            );
        }
    }

    /// Sets the tip area of `tooltip` to the area `path`, `column` and `cell` have
    /// in common. For example if `path` is [`None`] and `column` is set, the tip
    /// area will be set to the full area covered by `column`. See also
    /// [`Tooltip::set_tip_area()`][crate::Tooltip::set_tip_area()].
    ///
    /// Note that if `path` is not specified and `cell` is set and part of a column
    /// containing the expander, the tooltip might not show and hide at the correct
    /// position. In such cases `path` must be set to the current node under the
    /// mouse cursor for this function to operate correctly.
    ///
    /// See also [`set_tooltip_column()`][Self::set_tooltip_column()] for a simpler alternative.
    /// ## `tooltip`
    /// a [`Tooltip`][crate::Tooltip]
    /// ## `path`
    /// a [`TreePath`][crate::TreePath] or [`None`]
    /// ## `column`
    /// a [`TreeViewColumn`][crate::TreeViewColumn] or [`None`]
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer] or [`None`]
    #[doc(alias = "gtk_tree_view_set_tooltip_cell")]
    fn set_tooltip_cell(
        &self,
        tooltip: &Tooltip,
        path: Option<&TreePath>,
        column: Option<&impl IsA<TreeViewColumn>>,
        cell: Option<&impl IsA<CellRenderer>>,
    ) {
        unsafe {
            ffi::gtk_tree_view_set_tooltip_cell(
                self.as_ref().to_glib_none().0,
                tooltip.to_glib_none().0,
                mut_override(path.to_glib_none().0),
                column.map(|p| p.as_ref()).to_glib_none().0,
                cell.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// If you only plan to have simple (text-only) tooltips on full rows, you
    /// can use this function to have [`TreeView`][crate::TreeView] handle these automatically
    /// for you. `column` should be set to the column in `self`’s model
    /// containing the tooltip texts, or -1 to disable this feature.
    ///
    /// When enabled, [`has-tooltip`][struct@crate::Widget#has-tooltip] will be set to [`true`] and
    /// `self` will connect a [`query-tooltip`][struct@crate::Widget#query-tooltip] signal handler.
    ///
    /// Note that the signal handler sets the text with [`Tooltip::set_markup()`][crate::Tooltip::set_markup()],
    /// so &, <, etc have to be escaped in the text.
    /// ## `column`
    /// an integer, which is a valid column number for `self`’s model
    #[doc(alias = "gtk_tree_view_set_tooltip_column")]
    fn set_tooltip_column(&self, column: i32) {
        unsafe {
            ffi::gtk_tree_view_set_tooltip_column(self.as_ref().to_glib_none().0, column);
        }
    }

    /// Sets the tip area of `tooltip` to be the area covered by the row at `path`.
    /// See also [`set_tooltip_column()`][Self::set_tooltip_column()] for a simpler alternative.
    /// See also [`Tooltip::set_tip_area()`][crate::Tooltip::set_tip_area()].
    /// ## `tooltip`
    /// a [`Tooltip`][crate::Tooltip]
    /// ## `path`
    /// a [`TreePath`][crate::TreePath]
    #[doc(alias = "gtk_tree_view_set_tooltip_row")]
    fn set_tooltip_row(&self, tooltip: &Tooltip, path: &TreePath) {
        unsafe {
            ffi::gtk_tree_view_set_tooltip_row(
                self.as_ref().to_glib_none().0,
                tooltip.to_glib_none().0,
                mut_override(path.to_glib_none().0),
            );
        }
    }

    /// Undoes the effect of
    /// `gtk_tree_view_enable_model_drag_dest()`. Calling this method sets
    /// [`reorderable`][struct@crate::TreeView#reorderable] to [`false`].
    #[doc(alias = "gtk_tree_view_unset_rows_drag_dest")]
    fn unset_rows_drag_dest(&self) {
        unsafe {
            ffi::gtk_tree_view_unset_rows_drag_dest(self.as_ref().to_glib_none().0);
        }
    }

    /// Undoes the effect of
    /// `gtk_tree_view_enable_model_drag_source()`. Calling this method sets
    /// [`reorderable`][struct@crate::TreeView#reorderable] to [`false`].
    #[doc(alias = "gtk_tree_view_unset_rows_drag_source")]
    fn unset_rows_drag_source(&self) {
        unsafe {
            ffi::gtk_tree_view_unset_rows_drag_source(self.as_ref().to_glib_none().0);
        }
    }

    #[doc(alias = "enable-grid-lines")]
    fn enable_grid_lines(&self) -> TreeViewGridLines {
        ObjectExt::property(self.as_ref(), "enable-grid-lines")
    }

    #[doc(alias = "enable-grid-lines")]
    fn set_enable_grid_lines(&self, enable_grid_lines: TreeViewGridLines) {
        ObjectExt::set_property(self.as_ref(), "enable-grid-lines", enable_grid_lines)
    }

    /// The number of columns of the treeview has changed.
    #[doc(alias = "columns-changed")]
    fn connect_columns_changed<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn columns_changed_trampoline<P: IsA<TreeView>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"columns-changed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    columns_changed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// The position of the cursor (focused cell) has changed.
    #[doc(alias = "cursor-changed")]
    fn connect_cursor_changed<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn cursor_changed_trampoline<P: IsA<TreeView>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"cursor-changed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    cursor_changed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "expand-collapse-cursor-row")]
    fn connect_expand_collapse_cursor_row<F: Fn(&Self, bool, bool, bool) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn expand_collapse_cursor_row_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, bool, bool, bool) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            object: glib::ffi::gboolean,
            p0: glib::ffi::gboolean,
            p1: glib::ffi::gboolean,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                from_glib(object),
                from_glib(p0),
                from_glib(p1),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"expand-collapse-cursor-row\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    expand_collapse_cursor_row_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_expand_collapse_cursor_row(&self, object: bool, p0: bool, p1: bool) -> bool {
        self.emit_by_name("expand-collapse-cursor-row", &[&object, &p0, &p1])
    }

    /// The [`move-cursor`][struct@crate::TreeView#move-cursor] signal is a [keybinding
    /// signal][GtkBindingSignal] which gets emitted when the user
    /// presses one of the cursor keys.
    ///
    /// Applications should not connect to it, but may emit it with
    /// `g_signal_emit_by_name()` if they need to control the cursor
    /// programmatically. In contrast to [`set_cursor()`][Self::set_cursor()] and
    /// [`set_cursor_on_cell()`][Self::set_cursor_on_cell()] when moving horizontally
    /// [`move-cursor`][struct@crate::TreeView#move-cursor] does not reset the current selection.
    /// ## `step`
    /// the granularity of the move, as a
    /// [`MovementStep`][crate::MovementStep]. [`MovementStep::LogicalPositions`][crate::MovementStep::LogicalPositions],
    /// [`MovementStep::VisualPositions`][crate::MovementStep::VisualPositions], [`MovementStep::DisplayLines`][crate::MovementStep::DisplayLines],
    /// [`MovementStep::Pages`][crate::MovementStep::Pages] and [`MovementStep::BufferEnds`][crate::MovementStep::BufferEnds] are
    /// supported. [`MovementStep::LogicalPositions`][crate::MovementStep::LogicalPositions] and
    /// [`MovementStep::VisualPositions`][crate::MovementStep::VisualPositions] are treated identically.
    /// ## `direction`
    /// the direction to move: +1 to move forwards;
    /// -1 to move backwards. The resulting movement is
    /// undefined for all other values.
    ///
    /// # Returns
    ///
    /// [`true`] if `step` is supported, [`false`] otherwise.
    #[doc(alias = "move-cursor")]
    fn connect_move_cursor<F: Fn(&Self, MovementStep, i32) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn move_cursor_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, MovementStep, i32) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            step: ffi::GtkMovementStep,
            direction: libc::c_int,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                from_glib(step),
                direction,
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"move-cursor\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    move_cursor_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_move_cursor(&self, step: MovementStep, direction: i32) -> bool {
        self.emit_by_name("move-cursor", &[&step, &direction])
    }

    /// The "row-activated" signal is emitted when the method
    /// [`row_activated()`][Self::row_activated()] is called, when the user double
    /// clicks a treeview row with the "activate-on-single-click"
    /// property set to [`false`], or when the user single clicks a row when
    /// the "activate-on-single-click" property set to [`true`]. It is also
    /// emitted when a non-editable row is selected and one of the keys:
    /// Space, Shift+Space, Return or Enter is pressed.
    ///
    /// For selection handling refer to the
    /// [tree widget conceptual overview](TreeWidget.html)
    /// as well as [`TreeSelection`][crate::TreeSelection].
    /// ## `path`
    /// the [`TreePath`][crate::TreePath] for the activated row
    /// ## `column`
    /// the [`TreeViewColumn`][crate::TreeViewColumn] in which the activation occurred
    #[doc(alias = "row-activated")]
    fn connect_row_activated<F: Fn(&Self, &TreePath, &TreeViewColumn) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn row_activated_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, &TreePath, &TreeViewColumn) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            path: *mut ffi::GtkTreePath,
            column: *mut ffi::GtkTreeViewColumn,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(path),
                &from_glib_borrow(column),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"row-activated\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    row_activated_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_row_activated(&self, path: &TreePath, column: &TreeViewColumn) {
        self.emit_by_name::<()>("row-activated", &[&path, &column]);
    }

    /// The given row has been collapsed (child nodes are hidden).
    /// ## `iter`
    /// the tree iter of the collapsed row
    /// ## `path`
    /// a tree path that points to the row
    #[doc(alias = "row-collapsed")]
    fn connect_row_collapsed<F: Fn(&Self, &TreeIter, &TreePath) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn row_collapsed_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, &TreeIter, &TreePath) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            iter: *mut ffi::GtkTreeIter,
            path: *mut ffi::GtkTreePath,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(iter),
                &from_glib_borrow(path),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"row-collapsed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    row_collapsed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// The given row has been expanded (child nodes are shown).
    /// ## `iter`
    /// the tree iter of the expanded row
    /// ## `path`
    /// a tree path that points to the row
    #[doc(alias = "row-expanded")]
    fn connect_row_expanded<F: Fn(&Self, &TreeIter, &TreePath) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn row_expanded_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, &TreeIter, &TreePath) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            iter: *mut ffi::GtkTreeIter,
            path: *mut ffi::GtkTreePath,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(iter),
                &from_glib_borrow(path),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"row-expanded\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    row_expanded_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "select-all")]
    fn connect_select_all<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn select_all_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref()).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"select-all\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    select_all_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_select_all(&self) -> bool {
        self.emit_by_name("select-all", &[])
    }

    #[doc(alias = "select-cursor-parent")]
    fn connect_select_cursor_parent<F: Fn(&Self) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn select_cursor_parent_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref()).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"select-cursor-parent\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    select_cursor_parent_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_select_cursor_parent(&self) -> bool {
        self.emit_by_name("select-cursor-parent", &[])
    }

    #[doc(alias = "select-cursor-row")]
    fn connect_select_cursor_row<F: Fn(&Self, bool) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn select_cursor_row_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, bool) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            object: glib::ffi::gboolean,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                from_glib(object),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"select-cursor-row\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    select_cursor_row_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_select_cursor_row(&self, object: bool) -> bool {
        self.emit_by_name("select-cursor-row", &[&object])
    }

    #[doc(alias = "start-interactive-search")]
    fn connect_start_interactive_search<F: Fn(&Self) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn start_interactive_search_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref()).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"start-interactive-search\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    start_interactive_search_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_start_interactive_search(&self) -> bool {
        self.emit_by_name("start-interactive-search", &[])
    }

    /// The given row is about to be collapsed (hide its children nodes). Use this
    /// signal if you need to control the collapsibility of individual rows.
    /// ## `iter`
    /// the tree iter of the row to collapse
    /// ## `path`
    /// a tree path that points to the row
    ///
    /// # Returns
    ///
    /// [`false`] to allow collapsing, [`true`] to reject
    #[doc(alias = "test-collapse-row")]
    fn connect_test_collapse_row<
        F: Fn(&Self, &TreeIter, &TreePath) -> glib::Propagation + 'static,
    >(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn test_collapse_row_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, &TreeIter, &TreePath) -> glib::Propagation + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            iter: *mut ffi::GtkTreeIter,
            path: *mut ffi::GtkTreePath,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(iter),
                &from_glib_borrow(path),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"test-collapse-row\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    test_collapse_row_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// The given row is about to be expanded (show its children nodes). Use this
    /// signal if you need to control the expandability of individual rows.
    /// ## `iter`
    /// the tree iter of the row to expand
    /// ## `path`
    /// a tree path that points to the row
    ///
    /// # Returns
    ///
    /// [`false`] to allow expansion, [`true`] to reject
    #[doc(alias = "test-expand-row")]
    fn connect_test_expand_row<
        F: Fn(&Self, &TreeIter, &TreePath) -> glib::Propagation + 'static,
    >(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn test_expand_row_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P, &TreeIter, &TreePath) -> glib::Propagation + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            iter: *mut ffi::GtkTreeIter,
            path: *mut ffi::GtkTreePath,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                TreeView::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(iter),
                &from_glib_borrow(path),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"test-expand-row\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    test_expand_row_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "toggle-cursor-row")]
    fn connect_toggle_cursor_row<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn toggle_cursor_row_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref()).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"toggle-cursor-row\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    toggle_cursor_row_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_toggle_cursor_row(&self) -> bool {
        self.emit_by_name("toggle-cursor-row", &[])
    }

    #[doc(alias = "unselect-all")]
    fn connect_unselect_all<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn unselect_all_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref()).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"unselect-all\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    unselect_all_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_unselect_all(&self) -> bool {
        self.emit_by_name("unselect-all", &[])
    }

    #[doc(alias = "activate-on-single-click")]
    fn connect_activate_on_single_click_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_activate_on_single_click_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::activate-on-single-click\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_activate_on_single_click_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "enable-grid-lines")]
    fn connect_enable_grid_lines_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_enable_grid_lines_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::enable-grid-lines\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_enable_grid_lines_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "enable-search")]
    fn connect_enable_search_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_enable_search_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::enable-search\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_enable_search_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "enable-tree-lines")]
    fn connect_enable_tree_lines_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_enable_tree_lines_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::enable-tree-lines\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_enable_tree_lines_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "expander-column")]
    fn connect_expander_column_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_expander_column_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::expander-column\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_expander_column_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "fixed-height-mode")]
    fn connect_fixed_height_mode_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_fixed_height_mode_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::fixed-height-mode\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_fixed_height_mode_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "headers-clickable")]
    fn connect_headers_clickable_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_headers_clickable_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::headers-clickable\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_headers_clickable_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "headers-visible")]
    fn connect_headers_visible_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_headers_visible_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::headers-visible\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_headers_visible_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "hover-expand")]
    fn connect_hover_expand_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_hover_expand_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::hover-expand\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_hover_expand_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "hover-selection")]
    fn connect_hover_selection_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_hover_selection_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::hover-selection\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_hover_selection_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "level-indentation")]
    fn connect_level_indentation_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_level_indentation_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::level-indentation\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_level_indentation_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "model")]
    fn connect_model_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_model_trampoline<P: IsA<TreeView>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::model\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_model_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "reorderable")]
    fn connect_reorderable_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_reorderable_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::reorderable\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_reorderable_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "rubber-banding")]
    fn connect_rubber_banding_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_rubber_banding_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::rubber-banding\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_rubber_banding_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "search-column")]
    fn connect_search_column_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_search_column_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::search-column\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_search_column_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "show-expanders")]
    fn connect_show_expanders_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_show_expanders_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::show-expanders\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_show_expanders_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "tooltip-column")]
    fn connect_tooltip_column_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_tooltip_column_trampoline<
            P: IsA<TreeView>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkTreeView,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(TreeView::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::tooltip-column\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_tooltip_column_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl<O: IsA<TreeView>> TreeViewExt for O {}

impl fmt::Display for TreeView {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("TreeView")
    }
}