// 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::Align;
use crate::Buildable;
use crate::Container;
use crate::Orientable;
use crate::Orientation;
use crate::ResizeMode;
use crate::ScrollType;
use crate::Widget;
use glib::object::Cast;
use glib::object::IsA;
use glib::object::ObjectExt;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use glib::StaticType;
use glib::ToValue;
use std::boxed::Box as Box_;
use std::fmt;
use std::mem::transmute;

glib::wrapper! {
    /// [`Paned`][crate::Paned] has two panes, arranged either
    /// horizontally or vertically. The division between
    /// the two panes is adjustable by the user by dragging
    /// a handle.
    ///
    /// Child widgets are
    /// added to the panes of the widget with [`PanedExt::pack1()`][crate::prelude::PanedExt::pack1()] and
    /// [`PanedExt::pack2()`][crate::prelude::PanedExt::pack2()]. The division between the two children is set by default
    /// from the size requests of the children, but it can be adjusted by the
    /// user.
    ///
    /// A paned widget draws a separator between the two child widgets and a
    /// small handle that the user can drag to adjust the division. It does not
    /// draw any relief around the children or around the separator. (The space
    /// in which the separator is called the gutter.) Often, it is useful to put
    /// each child inside a [`Frame`][crate::Frame] with the shadow type set to [`ShadowType::In`][crate::ShadowType::In]
    /// so that the gutter appears as a ridge. No separator is drawn if one of
    /// the children is missing.
    ///
    /// Each child has two options that can be set, `resize` and `shrink`. If
    /// `resize` is true, then when the [`Paned`][crate::Paned] is resized, that child will
    /// expand or shrink along with the paned widget. If `shrink` is true, then
    /// that child can be made smaller than its requisition by the user.
    /// Setting `shrink` to [`false`] allows the application to set a minimum size.
    /// If `resize` is false for both children, then this is treated as if
    /// `resize` is true for both children.
    ///
    /// The application can set the position of the slider as if it were set
    /// by the user, by calling [`PanedExt::set_position()`][crate::prelude::PanedExt::set_position()].
    ///
    /// # CSS nodes
    ///
    ///
    ///
    /// **⚠️ The following code is in plain ⚠️**
    ///
    /// ```plain
    /// paned
    /// ├── <child>
    /// ├── separator[.wide]
    /// ╰── <child>
    /// ```
    ///
    /// GtkPaned has a main CSS node with name paned, and a subnode for
    /// the separator with name separator. The subnode gets a .wide style
    /// class when the paned is supposed to be wide.
    ///
    /// In horizontal orientation, the nodes of the children are always arranged
    /// from left to right. So :first-child will always select the leftmost child,
    /// regardless of text direction.
    ///
    /// ## Creating a paned widget with minimum sizes.
    ///
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// GtkWidget *hpaned = gtk_paned_new (GTK_ORIENTATION_HORIZONTAL);
    /// GtkWidget *frame1 = gtk_frame_new (NULL);
    /// GtkWidget *frame2 = gtk_frame_new (NULL);
    /// gtk_frame_set_shadow_type (GTK_FRAME (frame1), GTK_SHADOW_IN);
    /// gtk_frame_set_shadow_type (GTK_FRAME (frame2), GTK_SHADOW_IN);
    ///
    /// gtk_widget_set_size_request (hpaned, 200, -1);
    ///
    /// gtk_paned_pack1 (GTK_PANED (hpaned), frame1, TRUE, FALSE);
    /// gtk_widget_set_size_request (frame1, 50, -1);
    ///
    /// gtk_paned_pack2 (GTK_PANED (hpaned), frame2, FALSE, FALSE);
    /// gtk_widget_set_size_request (frame2, 50, -1);
    /// ```
    ///
    /// # Implements
    ///
    /// [`PanedExt`][trait@crate::prelude::PanedExt], [`ContainerExt`][trait@crate::prelude::ContainerExt], [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`OrientableExt`][trait@crate::prelude::OrientableExt], [`ContainerExtManual`][trait@crate::prelude::ContainerExtManual], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`BuildableExtManual`][trait@crate::prelude::BuildableExtManual]
    #[doc(alias = "GtkPaned")]
    pub struct Paned(Object<ffi::GtkPaned, ffi::GtkPanedClass>) @extends Container, Widget, @implements Buildable, Orientable;

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

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

    /// Creates a new [`Paned`][crate::Paned] widget.
    /// ## `orientation`
    /// the paned’s orientation.
    ///
    /// # Returns
    ///
    /// a new [`Paned`][crate::Paned].
    #[doc(alias = "gtk_paned_new")]
    pub fn new(orientation: Orientation) -> Paned {
        assert_initialized_main_thread!();
        unsafe { Widget::from_glib_none(ffi::gtk_paned_new(orientation.into_glib())).unsafe_cast() }
    }

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

impl Default for Paned {
    fn default() -> Self {
        glib::object::Object::new::<Self>(&[])
    }
}

#[derive(Clone, Default)]
// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`Paned`] 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 PanedBuilder {
    position: Option<i32>,
    position_set: Option<bool>,
    wide_handle: Option<bool>,
    border_width: Option<u32>,
    child: Option<Widget>,
    resize_mode: Option<ResizeMode>,
    app_paintable: Option<bool>,
    can_default: Option<bool>,
    can_focus: Option<bool>,
    events: Option<gdk::EventMask>,
    expand: Option<bool>,
    focus_on_click: Option<bool>,
    halign: Option<Align>,
    has_default: Option<bool>,
    has_focus: Option<bool>,
    has_tooltip: Option<bool>,
    height_request: Option<i32>,
    hexpand: Option<bool>,
    hexpand_set: Option<bool>,
    is_focus: Option<bool>,
    margin: Option<i32>,
    margin_bottom: Option<i32>,
    margin_end: Option<i32>,
    margin_start: Option<i32>,
    margin_top: Option<i32>,
    name: Option<String>,
    no_show_all: Option<bool>,
    opacity: Option<f64>,
    parent: Option<Container>,
    receives_default: Option<bool>,
    sensitive: Option<bool>,
    tooltip_markup: Option<String>,
    tooltip_text: Option<String>,
    valign: Option<Align>,
    vexpand: Option<bool>,
    vexpand_set: Option<bool>,
    visible: Option<bool>,
    width_request: Option<i32>,
    orientation: Option<Orientation>,
}

impl PanedBuilder {
    // rustdoc-stripper-ignore-next
    /// Create a new [`PanedBuilder`].
    pub fn new() -> Self {
        Self::default()
    }

    // rustdoc-stripper-ignore-next
    /// Build the [`Paned`].
    #[must_use = "Building the object from the builder is usually expensive and is not expected to have side effects"]
    pub fn build(self) -> Paned {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref position) = self.position {
            properties.push(("position", position));
        }
        if let Some(ref position_set) = self.position_set {
            properties.push(("position-set", position_set));
        }
        if let Some(ref wide_handle) = self.wide_handle {
            properties.push(("wide-handle", wide_handle));
        }
        if let Some(ref border_width) = self.border_width {
            properties.push(("border-width", border_width));
        }
        if let Some(ref child) = self.child {
            properties.push(("child", child));
        }
        if let Some(ref resize_mode) = self.resize_mode {
            properties.push(("resize-mode", resize_mode));
        }
        if let Some(ref app_paintable) = self.app_paintable {
            properties.push(("app-paintable", app_paintable));
        }
        if let Some(ref can_default) = self.can_default {
            properties.push(("can-default", can_default));
        }
        if let Some(ref can_focus) = self.can_focus {
            properties.push(("can-focus", can_focus));
        }
        if let Some(ref events) = self.events {
            properties.push(("events", events));
        }
        if let Some(ref expand) = self.expand {
            properties.push(("expand", expand));
        }
        if let Some(ref focus_on_click) = self.focus_on_click {
            properties.push(("focus-on-click", focus_on_click));
        }
        if let Some(ref halign) = self.halign {
            properties.push(("halign", halign));
        }
        if let Some(ref has_default) = self.has_default {
            properties.push(("has-default", has_default));
        }
        if let Some(ref has_focus) = self.has_focus {
            properties.push(("has-focus", has_focus));
        }
        if let Some(ref has_tooltip) = self.has_tooltip {
            properties.push(("has-tooltip", has_tooltip));
        }
        if let Some(ref height_request) = self.height_request {
            properties.push(("height-request", height_request));
        }
        if let Some(ref hexpand) = self.hexpand {
            properties.push(("hexpand", hexpand));
        }
        if let Some(ref hexpand_set) = self.hexpand_set {
            properties.push(("hexpand-set", hexpand_set));
        }
        if let Some(ref is_focus) = self.is_focus {
            properties.push(("is-focus", is_focus));
        }
        if let Some(ref margin) = self.margin {
            properties.push(("margin", margin));
        }
        if let Some(ref margin_bottom) = self.margin_bottom {
            properties.push(("margin-bottom", margin_bottom));
        }
        if let Some(ref margin_end) = self.margin_end {
            properties.push(("margin-end", margin_end));
        }
        if let Some(ref margin_start) = self.margin_start {
            properties.push(("margin-start", margin_start));
        }
        if let Some(ref margin_top) = self.margin_top {
            properties.push(("margin-top", margin_top));
        }
        if let Some(ref name) = self.name {
            properties.push(("name", name));
        }
        if let Some(ref no_show_all) = self.no_show_all {
            properties.push(("no-show-all", no_show_all));
        }
        if let Some(ref opacity) = self.opacity {
            properties.push(("opacity", opacity));
        }
        if let Some(ref parent) = self.parent {
            properties.push(("parent", parent));
        }
        if let Some(ref receives_default) = self.receives_default {
            properties.push(("receives-default", receives_default));
        }
        if let Some(ref sensitive) = self.sensitive {
            properties.push(("sensitive", sensitive));
        }
        if let Some(ref tooltip_markup) = self.tooltip_markup {
            properties.push(("tooltip-markup", tooltip_markup));
        }
        if let Some(ref tooltip_text) = self.tooltip_text {
            properties.push(("tooltip-text", tooltip_text));
        }
        if let Some(ref valign) = self.valign {
            properties.push(("valign", valign));
        }
        if let Some(ref vexpand) = self.vexpand {
            properties.push(("vexpand", vexpand));
        }
        if let Some(ref vexpand_set) = self.vexpand_set {
            properties.push(("vexpand-set", vexpand_set));
        }
        if let Some(ref visible) = self.visible {
            properties.push(("visible", visible));
        }
        if let Some(ref width_request) = self.width_request {
            properties.push(("width-request", width_request));
        }
        if let Some(ref orientation) = self.orientation {
            properties.push(("orientation", orientation));
        }
        glib::Object::new::<Paned>(&properties)
    }

    pub fn position(mut self, position: i32) -> Self {
        self.position = Some(position);
        self
    }

    pub fn position_set(mut self, position_set: bool) -> Self {
        self.position_set = Some(position_set);
        self
    }

    /// Setting this property to [`true`] indicates that the paned needs
    /// to provide stronger visual separation (e.g. because it separates
    /// between two notebooks, whose tab rows would otherwise merge visually).
    pub fn wide_handle(mut self, wide_handle: bool) -> Self {
        self.wide_handle = Some(wide_handle);
        self
    }

    pub fn border_width(mut self, border_width: u32) -> Self {
        self.border_width = Some(border_width);
        self
    }

    pub fn child(mut self, child: &impl IsA<Widget>) -> Self {
        self.child = Some(child.clone().upcast());
        self
    }

    pub fn resize_mode(mut self, resize_mode: ResizeMode) -> Self {
        self.resize_mode = Some(resize_mode);
        self
    }

    pub fn app_paintable(mut self, app_paintable: bool) -> Self {
        self.app_paintable = Some(app_paintable);
        self
    }

    pub fn can_default(mut self, can_default: bool) -> Self {
        self.can_default = Some(can_default);
        self
    }

    pub fn can_focus(mut self, can_focus: bool) -> Self {
        self.can_focus = Some(can_focus);
        self
    }

    pub fn events(mut self, events: gdk::EventMask) -> Self {
        self.events = Some(events);
        self
    }

    /// Whether to expand in both directions. Setting this sets both `property::Widget::hexpand` and `property::Widget::vexpand`
    pub fn expand(mut self, expand: bool) -> Self {
        self.expand = Some(expand);
        self
    }

    /// 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(mut self, focus_on_click: bool) -> Self {
        self.focus_on_click = Some(focus_on_click);
        self
    }

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

    pub fn has_default(mut self, has_default: bool) -> Self {
        self.has_default = Some(has_default);
        self
    }

    pub fn has_focus(mut self, has_focus: bool) -> Self {
        self.has_focus = Some(has_focus);
        self
    }

    /// Enables or disables the emission of `signal::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 `signal::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(mut self, has_tooltip: bool) -> Self {
        self.has_tooltip = Some(has_tooltip);
        self
    }

    pub fn height_request(mut self, height_request: i32) -> Self {
        self.height_request = Some(height_request);
        self
    }

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

    /// Whether to use the `property::Widget::hexpand` property. See [`WidgetExt::is_hexpand_set()`][crate::prelude::WidgetExt::is_hexpand_set()].
    pub fn hexpand_set(mut self, hexpand_set: bool) -> Self {
        self.hexpand_set = Some(hexpand_set);
        self
    }

    pub fn is_focus(mut self, is_focus: bool) -> Self {
        self.is_focus = Some(is_focus);
        self
    }

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

    /// 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(mut self, margin_bottom: i32) -> Self {
        self.margin_bottom = Some(margin_bottom);
        self
    }

    /// 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(mut self, margin_end: i32) -> Self {
        self.margin_end = Some(margin_end);
        self
    }

    /// 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(mut self, margin_start: i32) -> Self {
        self.margin_start = Some(margin_start);
        self
    }

    /// 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(mut self, margin_top: i32) -> Self {
        self.margin_top = Some(margin_top);
        self
    }

    pub fn name(mut self, name: &str) -> Self {
        self.name = Some(name.to_string());
        self
    }

    pub fn no_show_all(mut self, no_show_all: bool) -> Self {
        self.no_show_all = Some(no_show_all);
        self
    }

    /// 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(mut self, opacity: f64) -> Self {
        self.opacity = Some(opacity);
        self
    }

    pub fn parent(mut self, parent: &impl IsA<Container>) -> Self {
        self.parent = Some(parent.clone().upcast());
        self
    }

    pub fn receives_default(mut self, receives_default: bool) -> Self {
        self.receives_default = Some(receives_default);
        self
    }

    pub fn sensitive(mut self, sensitive: bool) -> Self {
        self.sensitive = Some(sensitive);
        self
    }

    /// 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`]: `property::Widget::has-tooltip`
    /// will automatically be set to [`true`] and there will be taken care of
    /// `signal::Widget::query-tooltip` in the default signal handler.
    ///
    /// Note that if both `property::Widget::tooltip-text` and `property::Widget::tooltip-markup`
    /// are set, the last one wins.
    pub fn tooltip_markup(mut self, tooltip_markup: &str) -> Self {
        self.tooltip_markup = Some(tooltip_markup.to_string());
        self
    }

    /// 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`]: `property::Widget::has-tooltip`
    /// will automatically be set to [`true`] and there will be taken care of
    /// `signal::Widget::query-tooltip` in the default signal handler.
    ///
    /// Note that if both `property::Widget::tooltip-text` and `property::Widget::tooltip-markup`
    /// are set, the last one wins.
    pub fn tooltip_text(mut self, tooltip_text: &str) -> Self {
        self.tooltip_text = Some(tooltip_text.to_string());
        self
    }

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

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

    /// Whether to use the `property::Widget::vexpand` property. See [`WidgetExt::is_vexpand_set()`][crate::prelude::WidgetExt::is_vexpand_set()].
    pub fn vexpand_set(mut self, vexpand_set: bool) -> Self {
        self.vexpand_set = Some(vexpand_set);
        self
    }

    pub fn visible(mut self, visible: bool) -> Self {
        self.visible = Some(visible);
        self
    }

    pub fn width_request(mut self, width_request: i32) -> Self {
        self.width_request = Some(width_request);
        self
    }

    /// The orientation of the orientable.
    pub fn orientation(mut self, orientation: Orientation) -> Self {
        self.orientation = Some(orientation);
        self
    }
}

/// Trait containing all [`struct@Paned`] methods.
///
/// # Implementors
///
/// [`Paned`][struct@crate::Paned]
pub trait PanedExt: 'static {
    /// Adds a child to the top or left pane with default parameters. This is
    /// equivalent to
    /// `gtk_paned_pack1 (paned, child, FALSE, TRUE)`.
    /// ## `child`
    /// the child to add
    #[doc(alias = "gtk_paned_add1")]
    fn add1(&self, child: &impl IsA<Widget>);

    /// Adds a child to the bottom or right pane with default parameters. This
    /// is equivalent to
    /// `gtk_paned_pack2 (paned, child, TRUE, TRUE)`.
    /// ## `child`
    /// the child to add
    #[doc(alias = "gtk_paned_add2")]
    fn add2(&self, child: &impl IsA<Widget>);

    /// Obtains the first child of the paned widget.
    ///
    /// # Returns
    ///
    /// first child, or [`None`] if it is not set.
    #[doc(alias = "gtk_paned_get_child1")]
    #[doc(alias = "get_child1")]
    fn child1(&self) -> Option<Widget>;

    /// Obtains the second child of the paned widget.
    ///
    /// # Returns
    ///
    /// second child, or [`None`] if it is not set.
    #[doc(alias = "gtk_paned_get_child2")]
    #[doc(alias = "get_child2")]
    fn child2(&self) -> Option<Widget>;

    /// Returns the [`gdk::Window`][crate::gdk::Window] of the handle. This function is
    /// useful when handling button or motion events because it
    /// enables the callback to distinguish between the window
    /// of the paned, a child and the handle.
    ///
    /// # Returns
    ///
    /// the paned’s handle window.
    #[doc(alias = "gtk_paned_get_handle_window")]
    #[doc(alias = "get_handle_window")]
    fn handle_window(&self) -> Option<gdk::Window>;

    /// Obtains the position of the divider between the two panes.
    ///
    /// # Returns
    ///
    /// position of the divider
    #[doc(alias = "gtk_paned_get_position")]
    #[doc(alias = "get_position")]
    fn position(&self) -> i32;

    /// Gets the `property::Paned::wide-handle` property.
    ///
    /// # Returns
    ///
    /// [`true`] if the paned should have a wide handle
    #[doc(alias = "gtk_paned_get_wide_handle")]
    #[doc(alias = "get_wide_handle")]
    fn is_wide_handle(&self) -> bool;

    /// Adds a child to the top or left pane.
    /// ## `child`
    /// the child to add
    /// ## `resize`
    /// should this child expand when the paned widget is resized.
    /// ## `shrink`
    /// can this child be made smaller than its requisition.
    #[doc(alias = "gtk_paned_pack1")]
    fn pack1(&self, child: &impl IsA<Widget>, resize: bool, shrink: bool);

    /// Adds a child to the bottom or right pane.
    /// ## `child`
    /// the child to add
    /// ## `resize`
    /// should this child expand when the paned widget is resized.
    /// ## `shrink`
    /// can this child be made smaller than its requisition.
    #[doc(alias = "gtk_paned_pack2")]
    fn pack2(&self, child: &impl IsA<Widget>, resize: bool, shrink: bool);

    /// Sets the position of the divider between the two panes.
    /// ## `position`
    /// pixel position of divider, a negative value means that the position
    ///  is unset.
    #[doc(alias = "gtk_paned_set_position")]
    fn set_position(&self, position: i32);

    /// Sets the `property::Paned::wide-handle` property.
    /// ## `wide`
    /// the new value for the `property::Paned::wide-handle` property
    #[doc(alias = "gtk_paned_set_wide_handle")]
    fn set_wide_handle(&self, wide: bool);

    /// The largest possible value for the position property.
    /// This property is derived from the size and shrinkability
    /// of the widget's children.
    #[doc(alias = "max-position")]
    fn max_position(&self) -> i32;

    /// The smallest possible value for the position property.
    /// This property is derived from the size and shrinkability
    /// of the widget's children.
    #[doc(alias = "min-position")]
    fn min_position(&self) -> i32;

    #[doc(alias = "position-set")]
    fn is_position_set(&self) -> bool;

    #[doc(alias = "position-set")]
    fn set_position_set(&self, position_set: bool);

    fn child_resizes<T: IsA<crate::Widget>>(&self, item: &T) -> bool;

    fn set_child_resize<T: IsA<crate::Widget>>(&self, item: &T, resize: bool);

    fn child_shrinks<T: IsA<crate::Widget>>(&self, item: &T) -> bool;

    fn set_child_shrink<T: IsA<crate::Widget>>(&self, item: &T, shrink: bool);

    /// The ::accept-position signal is a
    /// [keybinding signal][GtkBindingSignal]
    /// which gets emitted to accept the current position of the handle when
    /// moving it using key bindings.
    ///
    /// The default binding for this signal is Return or Space.
    #[doc(alias = "accept-position")]
    fn connect_accept_position<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId;

    fn emit_accept_position(&self) -> bool;

    /// The ::cancel-position signal is a
    /// [keybinding signal][GtkBindingSignal]
    /// which gets emitted to cancel moving the position of the handle using key
    /// bindings. The position of the handle will be reset to the value prior to
    /// moving it.
    ///
    /// The default binding for this signal is Escape.
    #[doc(alias = "cancel-position")]
    fn connect_cancel_position<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId;

    fn emit_cancel_position(&self) -> bool;

    /// The ::cycle-child-focus signal is a
    /// [keybinding signal][GtkBindingSignal]
    /// which gets emitted to cycle the focus between the children of the paned.
    ///
    /// The default binding is f6.
    /// ## `reversed`
    /// whether cycling backward or forward
    #[doc(alias = "cycle-child-focus")]
    fn connect_cycle_child_focus<F: Fn(&Self, bool) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    fn emit_cycle_child_focus(&self, reversed: bool) -> bool;

    /// The ::cycle-handle-focus signal is a
    /// [keybinding signal][GtkBindingSignal]
    /// which gets emitted to cycle whether the paned should grab focus to allow
    /// the user to change position of the handle by using key bindings.
    ///
    /// The default binding for this signal is f8.
    /// ## `reversed`
    /// whether cycling backward or forward
    #[doc(alias = "cycle-handle-focus")]
    fn connect_cycle_handle_focus<F: Fn(&Self, bool) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    fn emit_cycle_handle_focus(&self, reversed: bool) -> bool;

    /// The ::move-handle signal is a
    /// [keybinding signal][GtkBindingSignal]
    /// which gets emitted to move the handle when the user is using key bindings
    /// to move it.
    /// ## `scroll_type`
    /// a [`ScrollType`][crate::ScrollType]
    #[doc(alias = "move-handle")]
    fn connect_move_handle<F: Fn(&Self, ScrollType) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    fn emit_move_handle(&self, scroll_type: ScrollType) -> bool;

    /// The ::toggle-handle-focus is a
    /// [keybinding signal][GtkBindingSignal]
    /// which gets emitted to accept the current position of the handle and then
    /// move focus to the next widget in the focus chain.
    ///
    /// The default binding is Tab.
    #[doc(alias = "toggle-handle-focus")]
    fn connect_toggle_handle_focus<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId;

    fn emit_toggle_handle_focus(&self) -> bool;

    #[doc(alias = "max-position")]
    fn connect_max_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[doc(alias = "min-position")]
    fn connect_min_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[doc(alias = "position")]
    fn connect_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[doc(alias = "position-set")]
    fn connect_position_set_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[doc(alias = "wide-handle")]
    fn connect_wide_handle_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
}

impl<O: IsA<Paned>> PanedExt for O {
    fn add1(&self, child: &impl IsA<Widget>) {
        unsafe {
            ffi::gtk_paned_add1(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
            );
        }
    }

    fn add2(&self, child: &impl IsA<Widget>) {
        unsafe {
            ffi::gtk_paned_add2(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
            );
        }
    }

    fn child1(&self) -> Option<Widget> {
        unsafe { from_glib_none(ffi::gtk_paned_get_child1(self.as_ref().to_glib_none().0)) }
    }

    fn child2(&self) -> Option<Widget> {
        unsafe { from_glib_none(ffi::gtk_paned_get_child2(self.as_ref().to_glib_none().0)) }
    }

    fn handle_window(&self) -> Option<gdk::Window> {
        unsafe {
            from_glib_none(ffi::gtk_paned_get_handle_window(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn position(&self) -> i32 {
        unsafe { ffi::gtk_paned_get_position(self.as_ref().to_glib_none().0) }
    }

    fn is_wide_handle(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_paned_get_wide_handle(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn pack1(&self, child: &impl IsA<Widget>, resize: bool, shrink: bool) {
        unsafe {
            ffi::gtk_paned_pack1(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                resize.into_glib(),
                shrink.into_glib(),
            );
        }
    }

    fn pack2(&self, child: &impl IsA<Widget>, resize: bool, shrink: bool) {
        unsafe {
            ffi::gtk_paned_pack2(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                resize.into_glib(),
                shrink.into_glib(),
            );
        }
    }

    fn set_position(&self, position: i32) {
        unsafe {
            ffi::gtk_paned_set_position(self.as_ref().to_glib_none().0, position);
        }
    }

    fn set_wide_handle(&self, wide: bool) {
        unsafe {
            ffi::gtk_paned_set_wide_handle(self.as_ref().to_glib_none().0, wide.into_glib());
        }
    }

    fn max_position(&self) -> i32 {
        glib::ObjectExt::property(self.as_ref(), "max-position")
    }

    fn min_position(&self) -> i32 {
        glib::ObjectExt::property(self.as_ref(), "min-position")
    }

    fn is_position_set(&self) -> bool {
        glib::ObjectExt::property(self.as_ref(), "position-set")
    }

    fn set_position_set(&self, position_set: bool) {
        glib::ObjectExt::set_property(self.as_ref(), "position-set", &position_set)
    }

    fn child_resizes<T: IsA<crate::Widget>>(&self, item: &T) -> bool {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "resize",
        )
    }

    fn set_child_resize<T: IsA<crate::Widget>>(&self, item: &T, resize: bool) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "resize",
            &resize,
        )
    }

    fn child_shrinks<T: IsA<crate::Widget>>(&self, item: &T) -> bool {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "shrink",
        )
    }

    fn set_child_shrink<T: IsA<crate::Widget>>(&self, item: &T, shrink: bool) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "shrink",
            &shrink,
        )
    }

    fn connect_accept_position<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn accept_position_trampoline<
            P: IsA<Paned>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkPaned,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(Paned::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"accept-position\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    accept_position_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_accept_position(&self) -> bool {
        self.emit_by_name("accept-position", &[])
    }

    fn connect_cancel_position<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn cancel_position_trampoline<
            P: IsA<Paned>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkPaned,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(Paned::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"cancel-position\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    cancel_position_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_cancel_position(&self) -> bool {
        self.emit_by_name("cancel-position", &[])
    }

    fn connect_cycle_child_focus<F: Fn(&Self, bool) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn cycle_child_focus_trampoline<
            P: IsA<Paned>,
            F: Fn(&P, bool) -> bool + 'static,
        >(
            this: *mut ffi::GtkPaned,
            reversed: glib::ffi::gboolean,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                Paned::from_glib_borrow(this).unsafe_cast_ref(),
                from_glib(reversed),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"cycle-child-focus\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    cycle_child_focus_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_cycle_child_focus(&self, reversed: bool) -> bool {
        self.emit_by_name("cycle-child-focus", &[&reversed])
    }

    fn connect_cycle_handle_focus<F: Fn(&Self, bool) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn cycle_handle_focus_trampoline<
            P: IsA<Paned>,
            F: Fn(&P, bool) -> bool + 'static,
        >(
            this: *mut ffi::GtkPaned,
            reversed: glib::ffi::gboolean,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                Paned::from_glib_borrow(this).unsafe_cast_ref(),
                from_glib(reversed),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"cycle-handle-focus\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    cycle_handle_focus_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_cycle_handle_focus(&self, reversed: bool) -> bool {
        self.emit_by_name("cycle-handle-focus", &[&reversed])
    }

    fn connect_move_handle<F: Fn(&Self, ScrollType) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn move_handle_trampoline<
            P: IsA<Paned>,
            F: Fn(&P, ScrollType) -> bool + 'static,
        >(
            this: *mut ffi::GtkPaned,
            scroll_type: ffi::GtkScrollType,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                Paned::from_glib_borrow(this).unsafe_cast_ref(),
                from_glib(scroll_type),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"move-handle\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    move_handle_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_move_handle(&self, scroll_type: ScrollType) -> bool {
        self.emit_by_name("move-handle", &[&scroll_type])
    }

    fn connect_toggle_handle_focus<F: Fn(&Self) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn toggle_handle_focus_trampoline<
            P: IsA<Paned>,
            F: Fn(&P) -> bool + 'static,
        >(
            this: *mut ffi::GtkPaned,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(Paned::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-handle-focus\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    toggle_handle_focus_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_toggle_handle_focus(&self) -> bool {
        self.emit_by_name("toggle-handle-focus", &[])
    }

    fn connect_max_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_max_position_trampoline<P: IsA<Paned>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkPaned,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Paned::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::max-position\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_max_position_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_min_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_min_position_trampoline<P: IsA<Paned>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkPaned,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Paned::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::min-position\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_min_position_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_position_trampoline<P: IsA<Paned>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkPaned,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Paned::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::position\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_position_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_position_set_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_position_set_trampoline<P: IsA<Paned>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkPaned,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Paned::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::position-set\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_position_set_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_wide_handle_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_wide_handle_trampoline<P: IsA<Paned>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkPaned,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Paned::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::wide-handle\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_wide_handle_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

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