gtk4/auto/

tree_expander.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

#[cfg(feature = "v4_10")]
#[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
use crate::Accessible;
use crate::{
    AccessibleRole, Align, Buildable, ConstraintTarget, LayoutManager, Overflow, TreeListRow,
    Widget, ffi,
};
use glib::{
    prelude::*,
    signal::{SignalHandlerId, connect_raw},
    translate::*,
};
use std::boxed::Box as Box_;

#[cfg(feature = "v4_10")]
#[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
glib::wrapper! {
    /// Provides an expander for a tree-like list.
    ///
    /// It is typically placed as a bottommost child into a [`ListView`][crate::ListView]
    /// to allow users to expand and collapse children in a list with a
    /// [`TreeListModel`][crate::TreeListModel]. [`TreeExpander`][crate::TreeExpander] provides the common UI
    /// elements, gestures and keybindings for this purpose.
    ///
    /// On top of this, the "listitem.expand", "listitem.collapse" and
    /// "listitem.toggle-expand" actions are provided to allow adding custom
    /// UI for managing expanded state.
    ///
    /// It is important to mention that you want to set the
    /// [`focusable`][struct@crate::ListItem#focusable] property to FALSE when using this
    /// widget, as you want the keyboard focus to be in the treexpander, and not
    /// inside the list to make use of the keybindings.
    ///
    /// The [`TreeListModel`][crate::TreeListModel] must be set to not be passthrough. Then it
    /// will provide [`TreeListRow`][crate::TreeListRow] items which can be set via
    /// [`set_list_row()`][Self::set_list_row()] on the expander.
    /// The expander will then watch that row item automatically.
    /// [`set_child()`][Self::set_child()] sets the widget that displays
    /// the actual row contents.
    ///
    /// [`TreeExpander`][crate::TreeExpander] can be modified with properties such as
    /// [`indent-for-icon`][struct@crate::TreeExpander#indent-for-icon],
    /// [`indent-for-depth`][struct@crate::TreeExpander#indent-for-depth], and
    /// [`hide-expander`][struct@crate::TreeExpander#hide-expander] to achieve a different appearance.
    /// This can even be done to influence individual rows, for example by binding
    /// the [`hide-expander`][struct@crate::TreeExpander#hide-expander] property to the item count of
    /// the model of the treelistrow, to hide the expander for rows without children,
    /// even if the row is expandable.
    ///
    /// ## Shortcuts and Gestures
    ///
    /// [`TreeExpander`][crate::TreeExpander] supports the following keyboard shortcuts:
    ///
    /// - <kbd>+</kbd> or <kbd>*</kbd> expands the expander.
    /// - <kbd>-</kbd> or <kbd>/</kbd> collapses the expander.
    /// - Left and right arrow keys, when combined with <kbd>Shift</kbd> or
    ///   <kbd>Ctrl</kbd>+<kbd>Shift</kbd>, will expand or collapse, depending on
    ///   the locale's text direction.
    /// - <kbd>Ctrl</kbd>+<kbd>␣</kbd> toggles the expander state.
    ///
    /// The row can also expand on drag gestures.
    ///
    /// ## Actions
    ///
    /// [`TreeExpander`][crate::TreeExpander] defines a set of built-in actions:
    ///
    /// - `listitem.expand` expands the expander if it can be expanded.
    /// - `listitem.collapse` collapses the expander.
    /// - `listitem.toggle-expand` tries to expand the expander if it was collapsed
    ///   or collapses it if it was expanded.
    ///
    /// ## CSS nodes
    ///
    /// ```text
    /// treeexpander
    /// ├── [indent]*
    /// ├── [expander]
    /// ╰── <child>
    /// ```
    ///
    /// [`TreeExpander`][crate::TreeExpander] has zero or one CSS nodes with the name "expander" that
    /// should display the expander icon. The node will be `:checked` when it
    /// is expanded. If the node is not expandable, an "indent" node will be
    /// displayed instead.
    ///
    /// For every level of depth, another "indent" node is prepended.
    ///
    /// ## Accessibility
    ///
    /// Until GTK 4.10, [`TreeExpander`][crate::TreeExpander] used the [enum@Gtk.AccessibleRole.group] role.
    ///
    /// Since GTK 4.12, [`TreeExpander`][crate::TreeExpander] uses the [enum@Gtk.AccessibleRole.button] role.
    /// Toggling it will change the `GTK_ACCESSIBLE_STATE_EXPANDED` state.
    ///
    /// ## Properties
    ///
    ///
    /// #### `child`
    ///  The child widget with the actual contents.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `hide-expander`
    ///  Whether the expander icon should be hidden in a GtkTreeListRow.
    /// Note that this property simply hides the icon.  The actions and keybinding
    /// (i.e. collapse and expand) are not affected by this property.
    ///
    /// A common use for this property would be to bind to the number of children in a
    /// GtkTreeListRow's model in order to hide the expander when a row has no children.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `indent-for-depth`
    ///  TreeExpander indents the child according to its depth.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `indent-for-icon`
    ///  TreeExpander indents the child by the width of an expander-icon if it is not expandable.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `item`
    ///  The item held by this expander's row.
    ///
    /// Readable
    ///
    ///
    /// #### `list-row`
    ///  The list row to track for expander state.
    ///
    /// Readable | Writable
    /// <details><summary><h4>Widget</h4></summary>
    ///
    ///
    /// #### `can-focus`
    ///  Whether the widget or any of its descendents can accept
    /// the input focus.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `can-target`
    ///  Whether the widget can receive pointer events.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `css-classes`
    ///  A list of css classes applied to this widget.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `css-name`
    ///  The name of this widget in the CSS tree.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writable | Construct Only
    ///
    ///
    /// #### `cursor`
    ///  The cursor used by @widget.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `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.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `focusable`
    ///  Whether this widget itself will accept the input focus.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `halign`
    ///  How to distribute horizontal space if widget gets extra space.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `has-default`
    ///  Whether the widget is the default widget.
    ///
    /// Readable
    ///
    ///
    /// #### `has-focus`
    ///  Whether the widget has the input focus.
    ///
    /// Readable
    ///
    ///
    /// #### `has-tooltip`
    ///  Enables or disables the emission of the [`query-tooltip`][struct@crate::Widget#query-tooltip]
    /// signal on @widget.
    ///
    /// A true value 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.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `height-request`
    ///  Overrides for height request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `hexpand`
    ///  Whether to expand horizontally.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `hexpand-set`
    ///  Whether to use the `hexpand` property.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `layout-manager`
    ///  The [`LayoutManager`][crate::LayoutManager] instance to use to compute
    /// the preferred size of the widget, and allocate its children.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `limit-events`
    ///  Makes this widget act like a modal dialog, with respect to
    /// event delivery.
    ///
    /// Global event controllers will not handle events with targets
    /// inside the widget, unless they are set up to ignore propagation
    /// limits. See [`EventControllerExt::set_propagation_limit()`][crate::prelude::EventControllerExt::set_propagation_limit()].
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `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 | Writable
    ///
    ///
    /// #### `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 | Writable
    ///
    ///
    /// #### `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 | Writable
    ///
    ///
    /// #### `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 | Writable
    ///
    ///
    /// #### `name`
    ///  The name of the widget.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `opacity`
    ///  The requested opacity of the widget.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `overflow`
    ///  How content outside the widget's content area is treated.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `parent`
    ///  The parent widget of this widget.
    ///
    /// Readable
    ///
    ///
    /// #### `receives-default`
    ///  Whether the widget will receive the default action when it is focused.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `root`
    ///  The [`Root`][crate::Root] widget of the widget tree containing this widget.
    ///
    /// This will be `NULL` if the widget is not contained in a root widget.
    ///
    /// Readable
    ///
    ///
    /// #### `scale-factor`
    ///  The scale factor of the widget.
    ///
    /// Readable
    ///
    ///
    /// #### `sensitive`
    ///  Whether the widget responds to input.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `tooltip-markup`
    ///  Sets the text of tooltip to be the given string, which is marked up
    /// with Pango markup.
    ///
    /// 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 `NULL`:
    /// [`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 | Writable
    ///
    ///
    /// #### `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 `NULL`:
    /// [`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 | Writable
    ///
    ///
    /// #### `valign`
    ///  How to distribute vertical space if widget gets extra space.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `vexpand`
    ///  Whether to expand vertically.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `vexpand-set`
    ///  Whether to use the `vexpand` property.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `visible`
    ///  Whether the widget is visible.
    ///
    /// Readable | Writable
    ///
    ///
    /// #### `width-request`
    ///  Overrides for width request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    ///
    /// Readable | Writable
    /// </details>
    /// <details><summary><h4>Accessible</h4></summary>
    ///
    ///
    /// #### `accessible-role`
    ///  The accessible role of the given [`Accessible`][crate::Accessible] implementation.
    ///
    /// The accessible role cannot be changed once set.
    ///
    /// Readable | Writable
    /// </details>
    ///
    /// # Implements
    ///
    /// [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`AccessibleExt`][trait@crate::prelude::AccessibleExt], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`ConstraintTargetExt`][trait@crate::prelude::ConstraintTargetExt], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`AccessibleExtManual`][trait@crate::prelude::AccessibleExtManual]
    #[doc(alias = "GtkTreeExpander")]
    pub struct TreeExpander(Object<ffi::GtkTreeExpander, ffi::GtkTreeExpanderClass>) @extends Widget, @implements Accessible, Buildable, ConstraintTarget;

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

#[cfg(not(feature = "v4_10"))]
glib::wrapper! {
    #[doc(alias = "GtkTreeExpander")]
    pub struct TreeExpander(Object<ffi::GtkTreeExpander, ffi::GtkTreeExpanderClass>) @extends Widget, @implements Buildable, ConstraintTarget;

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

impl TreeExpander {
    /// Creates a new [`TreeExpander`][crate::TreeExpander]
    ///
    /// # Returns
    ///
    /// a new [`TreeExpander`][crate::TreeExpander]
    #[doc(alias = "gtk_tree_expander_new")]
    pub fn new() -> TreeExpander {
        assert_initialized_main_thread!();
        unsafe { Widget::from_glib_none(ffi::gtk_tree_expander_new()).unsafe_cast() }
    }

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

    /// Gets the child widget displayed by @self.
    ///
    /// # Returns
    ///
    /// The child displayed by @self
    #[doc(alias = "gtk_tree_expander_get_child")]
    #[doc(alias = "get_child")]
    pub fn child(&self) -> Option<Widget> {
        unsafe { from_glib_none(ffi::gtk_tree_expander_get_child(self.to_glib_none().0)) }
    }

    /// Gets whether the TreeExpander should be hidden in a GtkTreeListRow.
    ///
    /// # Returns
    ///
    /// TRUE if the expander icon should be hidden. Otherwise FALSE.
    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    #[doc(alias = "gtk_tree_expander_get_hide_expander")]
    #[doc(alias = "get_hide_expander")]
    #[doc(alias = "hide-expander")]
    pub fn hides_expander(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_expander_get_hide_expander(
                self.to_glib_none().0,
            ))
        }
    }

    /// TreeExpander indents each level of depth with an additional indent.
    ///
    /// # Returns
    ///
    /// TRUE if the child should be indented . Otherwise FALSE.
    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    #[doc(alias = "gtk_tree_expander_get_indent_for_depth")]
    #[doc(alias = "get_indent_for_depth")]
    #[doc(alias = "indent-for-depth")]
    pub fn is_indent_for_depth(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_expander_get_indent_for_depth(
                self.to_glib_none().0,
            ))
        }
    }

    /// TreeExpander indents the child by the width of an expander-icon if it is not expandable.
    ///
    /// # Returns
    ///
    /// TRUE if the child should be indented when not expandable. Otherwise FALSE.
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "gtk_tree_expander_get_indent_for_icon")]
    #[doc(alias = "get_indent_for_icon")]
    #[doc(alias = "indent-for-icon")]
    pub fn is_indent_for_icon(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_tree_expander_get_indent_for_icon(
                self.to_glib_none().0,
            ))
        }
    }

    /// Forwards the item set on the [`TreeListRow`][crate::TreeListRow] that @self is managing.
    ///
    /// This call is essentially equivalent to calling:
    ///
    /// **⚠️ The following code is in c ⚠️**
    ///
    /// ```c
    /// gtk_tree_list_row_get_item (gtk_tree_expander_get_list_row (@self));
    /// ```
    ///
    /// # Returns
    ///
    /// The item of the row
    #[doc(alias = "gtk_tree_expander_get_item")]
    #[doc(alias = "get_item")]
    pub fn item(&self) -> Option<glib::Object> {
        unsafe { from_glib_full(ffi::gtk_tree_expander_get_item(self.to_glib_none().0)) }
    }

    /// Gets the list row managed by @self.
    ///
    /// # Returns
    ///
    /// The list row displayed by @self
    #[doc(alias = "gtk_tree_expander_get_list_row")]
    #[doc(alias = "get_list_row")]
    #[doc(alias = "list-row")]
    pub fn list_row(&self) -> Option<TreeListRow> {
        unsafe { from_glib_none(ffi::gtk_tree_expander_get_list_row(self.to_glib_none().0)) }
    }

    /// Sets the content widget to display.
    /// ## `child`
    /// a [`Widget`][crate::Widget]
    #[doc(alias = "gtk_tree_expander_set_child")]
    #[doc(alias = "child")]
    pub fn set_child(&self, child: Option<&impl IsA<Widget>>) {
        unsafe {
            ffi::gtk_tree_expander_set_child(
                self.to_glib_none().0,
                child.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets whether the expander icon should be visible in a GtkTreeListRow.
    /// ## `hide_expander`
    /// TRUE if the expander should be hidden. Otherwise FALSE.
    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    #[doc(alias = "gtk_tree_expander_set_hide_expander")]
    #[doc(alias = "hide-expander")]
    pub fn set_hide_expander(&self, hide_expander: bool) {
        unsafe {
            ffi::gtk_tree_expander_set_hide_expander(
                self.to_glib_none().0,
                hide_expander.into_glib(),
            );
        }
    }

    /// Sets if the TreeExpander should indent the child according to its depth.
    /// ## `indent_for_depth`
    /// TRUE if the child should be indented. Otherwise FALSE.
    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    #[doc(alias = "gtk_tree_expander_set_indent_for_depth")]
    #[doc(alias = "indent-for-depth")]
    pub fn set_indent_for_depth(&self, indent_for_depth: bool) {
        unsafe {
            ffi::gtk_tree_expander_set_indent_for_depth(
                self.to_glib_none().0,
                indent_for_depth.into_glib(),
            );
        }
    }

    /// Sets if the TreeExpander should indent the child by the width of an expander-icon when it is not expandable.
    /// ## `indent_for_icon`
    /// TRUE if the child should be indented without expander. Otherwise FALSE.
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "gtk_tree_expander_set_indent_for_icon")]
    #[doc(alias = "indent-for-icon")]
    pub fn set_indent_for_icon(&self, indent_for_icon: bool) {
        unsafe {
            ffi::gtk_tree_expander_set_indent_for_icon(
                self.to_glib_none().0,
                indent_for_icon.into_glib(),
            );
        }
    }

    /// Sets the tree list row that this expander should manage.
    /// ## `list_row`
    /// a [`TreeListRow`][crate::TreeListRow]
    #[doc(alias = "gtk_tree_expander_set_list_row")]
    #[doc(alias = "list-row")]
    pub fn set_list_row(&self, list_row: Option<&TreeListRow>) {
        unsafe {
            ffi::gtk_tree_expander_set_list_row(self.to_glib_none().0, list_row.to_glib_none().0);
        }
    }

    #[doc(alias = "child")]
    pub fn connect_child_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_child_trampoline<F: Fn(&TreeExpander) + 'static>(
            this: *mut ffi::GtkTreeExpander,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(&from_glib_borrow(this))
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::child".as_ptr(),
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_child_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    #[doc(alias = "hide-expander")]
    pub fn connect_hide_expander_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_hide_expander_trampoline<F: Fn(&TreeExpander) + 'static>(
            this: *mut ffi::GtkTreeExpander,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(&from_glib_borrow(this))
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::hide-expander".as_ptr(),
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_hide_expander_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    #[doc(alias = "indent-for-depth")]
    pub fn connect_indent_for_depth_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_indent_for_depth_trampoline<F: Fn(&TreeExpander) + 'static>(
            this: *mut ffi::GtkTreeExpander,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(&from_glib_borrow(this))
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::indent-for-depth".as_ptr(),
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_indent_for_depth_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "indent-for-icon")]
    pub fn connect_indent_for_icon_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_indent_for_icon_trampoline<F: Fn(&TreeExpander) + 'static>(
            this: *mut ffi::GtkTreeExpander,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(&from_glib_borrow(this))
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::indent-for-icon".as_ptr(),
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_indent_for_icon_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "item")]
    pub fn connect_item_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_item_trampoline<F: Fn(&TreeExpander) + 'static>(
            this: *mut ffi::GtkTreeExpander,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(&from_glib_borrow(this))
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::item".as_ptr(),
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_item_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "list-row")]
    pub fn connect_list_row_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_list_row_trampoline<F: Fn(&TreeExpander) + 'static>(
            this: *mut ffi::GtkTreeExpander,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(&from_glib_borrow(this))
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::list-row".as_ptr(),
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_list_row_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

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

// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`TreeExpander`] 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 TreeExpanderBuilder {
    builder: glib::object::ObjectBuilder<'static, TreeExpander>,
}

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

    /// The child widget with the actual contents.
    pub fn child(self, child: &impl IsA<Widget>) -> Self {
        Self {
            builder: self.builder.property("child", child.clone().upcast()),
        }
    }

    /// Whether the expander icon should be hidden in a GtkTreeListRow.
    /// Note that this property simply hides the icon.  The actions and keybinding
    /// (i.e. collapse and expand) are not affected by this property.
    ///
    /// A common use for this property would be to bind to the number of children in a
    /// GtkTreeListRow's model in order to hide the expander when a row has no children.
    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    pub fn hide_expander(self, hide_expander: bool) -> Self {
        Self {
            builder: self.builder.property("hide-expander", hide_expander),
        }
    }

    /// TreeExpander indents the child according to its depth.
    #[cfg(feature = "v4_10")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_10")))]
    pub fn indent_for_depth(self, indent_for_depth: bool) -> Self {
        Self {
            builder: self.builder.property("indent-for-depth", indent_for_depth),
        }
    }

    /// TreeExpander indents the child by the width of an expander-icon if it is not expandable.
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    pub fn indent_for_icon(self, indent_for_icon: bool) -> Self {
        Self {
            builder: self.builder.property("indent-for-icon", indent_for_icon),
        }
    }

    /// The list row to track for expander state.
    pub fn list_row(self, list_row: &TreeListRow) -> Self {
        Self {
            builder: self.builder.property("list-row", list_row.clone()),
        }
    }

    /// Whether the widget or any of its descendents can accept
    /// the input focus.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    pub fn can_focus(self, can_focus: bool) -> Self {
        Self {
            builder: self.builder.property("can-focus", can_focus),
        }
    }

    /// Whether the widget can receive pointer events.
    pub fn can_target(self, can_target: bool) -> Self {
        Self {
            builder: self.builder.property("can-target", can_target),
        }
    }

    /// A list of css classes applied to this widget.
    pub fn css_classes(self, css_classes: impl Into<glib::StrV>) -> Self {
        Self {
            builder: self.builder.property("css-classes", css_classes.into()),
        }
    }

    /// The name of this widget in the CSS tree.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    pub fn css_name(self, css_name: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("css-name", css_name.into()),
        }
    }

    /// The cursor used by @widget.
    pub fn cursor(self, cursor: &gdk::Cursor) -> Self {
        Self {
            builder: self.builder.property("cursor", cursor.clone()),
        }
    }

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

    /// Whether this widget itself will accept the input focus.
    pub fn focusable(self, focusable: bool) -> Self {
        Self {
            builder: self.builder.property("focusable", focusable),
        }
    }

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

    /// Enables or disables the emission of the [`query-tooltip`][struct@crate::Widget#query-tooltip]
    /// signal on @widget.
    ///
    /// A true value 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.
    pub fn has_tooltip(self, has_tooltip: bool) -> Self {
        Self {
            builder: self.builder.property("has-tooltip", has_tooltip),
        }
    }

    /// Overrides for height request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    pub fn height_request(self, height_request: i32) -> Self {
        Self {
            builder: self.builder.property("height-request", height_request),
        }
    }

    /// Whether to expand horizontally.
    pub fn hexpand(self, hexpand: bool) -> Self {
        Self {
            builder: self.builder.property("hexpand", hexpand),
        }
    }

    /// Whether to use the `hexpand` property.
    pub fn hexpand_set(self, hexpand_set: bool) -> Self {
        Self {
            builder: self.builder.property("hexpand-set", hexpand_set),
        }
    }

    /// The [`LayoutManager`][crate::LayoutManager] instance to use to compute
    /// the preferred size of the widget, and allocate its children.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    pub fn layout_manager(self, layout_manager: &impl IsA<LayoutManager>) -> Self {
        Self {
            builder: self
                .builder
                .property("layout-manager", layout_manager.clone().upcast()),
        }
    }

    /// Makes this widget act like a modal dialog, with respect to
    /// event delivery.
    ///
    /// Global event controllers will not handle events with targets
    /// inside the widget, unless they are set up to ignore propagation
    /// limits. See [`EventControllerExt::set_propagation_limit()`][crate::prelude::EventControllerExt::set_propagation_limit()].
    #[cfg(feature = "v4_18")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_18")))]
    pub fn limit_events(self, limit_events: bool) -> Self {
        Self {
            builder: self.builder.property("limit-events", limit_events),
        }
    }

    /// 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),
        }
    }

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

    /// The requested opacity of the widget.
    pub fn opacity(self, opacity: f64) -> Self {
        Self {
            builder: self.builder.property("opacity", opacity),
        }
    }

    /// How content outside the widget's content area is treated.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    pub fn overflow(self, overflow: Overflow) -> Self {
        Self {
            builder: self.builder.property("overflow", overflow),
        }
    }

    /// Whether the widget will receive the default action when it is focused.
    pub fn receives_default(self, receives_default: bool) -> Self {
        Self {
            builder: self.builder.property("receives-default", receives_default),
        }
    }

    /// Whether the widget responds to input.
    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 Pango markup.
    ///
    /// 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 `NULL`:
    /// [`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 `NULL`:
    /// [`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.
    pub fn valign(self, valign: Align) -> Self {
        Self {
            builder: self.builder.property("valign", valign),
        }
    }

    /// Whether to expand vertically.
    pub fn vexpand(self, vexpand: bool) -> Self {
        Self {
            builder: self.builder.property("vexpand", vexpand),
        }
    }

    /// Whether to use the `vexpand` property.
    pub fn vexpand_set(self, vexpand_set: bool) -> Self {
        Self {
            builder: self.builder.property("vexpand-set", vexpand_set),
        }
    }

    /// Whether the widget is visible.
    pub fn visible(self, visible: bool) -> Self {
        Self {
            builder: self.builder.property("visible", visible),
        }
    }

    /// Overrides for width request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    pub fn width_request(self, width_request: i32) -> Self {
        Self {
            builder: self.builder.property("width-request", width_request),
        }
    }

    /// The accessible role of the given [`Accessible`][crate::Accessible] implementation.
    ///
    /// The accessible role cannot be changed once set.
    pub fn accessible_role(self, accessible_role: AccessibleRole) -> Self {
        Self {
            builder: self.builder.property("accessible-role", accessible_role),
        }
    }

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