// 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;
use crate::Buildable;
use crate::ResizeMode;
use crate::Widget;
use crate::WidgetPath;
use glib::object::Cast;
use glib::object::IsA;
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! {
    /// A GTK+ user interface is constructed by nesting widgets inside widgets.
    /// Container widgets are the inner nodes in the resulting tree of widgets:
    /// they contain other widgets. So, for example, you might have a [`Window`][crate::Window]
    /// containing a [`Frame`][crate::Frame] containing a [`Label`][crate::Label]. If you wanted an image instead
    /// of a textual label inside the frame, you might replace the [`Label`][crate::Label] widget
    /// with a [`Image`][crate::Image] widget.
    ///
    /// There are two major kinds of container widgets in GTK+. Both are subclasses
    /// of the abstract GtkContainer base class.
    ///
    /// The first type of container widget has a single child widget and derives
    /// from [`Bin`][crate::Bin]. These containers are decorators, which
    /// add some kind of functionality to the child. For example, a [`Button`][crate::Button] makes
    /// its child into a clickable button; a [`Frame`][crate::Frame] draws a frame around its child
    /// and a [`Window`][crate::Window] places its child widget inside a top-level window.
    ///
    /// The second type of container can have more than one child; its purpose is to
    /// manage layout. This means that these containers assign
    /// sizes and positions to their children. For example, a `GtkHBox` arranges its
    /// children in a horizontal row, and a [`Grid`][crate::Grid] arranges the widgets it contains
    /// in a two-dimensional grid.
    ///
    /// For implementations of [`Container`][crate::Container] the virtual method `GtkContainerClass.forall()`
    /// is always required, since it's used for drawing and other internal operations
    /// on the children.
    /// If the [`Container`][crate::Container] implementation expect to have non internal children
    /// it's needed to implement both `GtkContainerClass.add()` and `GtkContainerClass.remove()`.
    /// If the GtkContainer implementation has internal children, they should be added
    /// with [`WidgetExt::set_parent()`][crate::prelude::WidgetExt::set_parent()] on `init()` and removed with [`WidgetExt::unparent()`][crate::prelude::WidgetExt::unparent()]
    /// in the `GtkWidgetClass.destroy()` implementation.
    /// See more about implementing custom widgets at https://wiki.gnome.org/HowDoI/CustomWidgets
    ///
    /// # Height for width geometry management
    ///
    /// GTK+ uses a height-for-width (and width-for-height) geometry management system.
    /// Height-for-width means that a widget can change how much vertical space it needs,
    /// depending on the amount of horizontal space that it is given (and similar for
    /// width-for-height).
    ///
    /// There are some things to keep in mind when implementing container widgets
    /// that make use of GTK+’s height for width geometry management system. First,
    /// it’s important to note that a container must prioritize one of its
    /// dimensions, that is to say that a widget or container can only have a
    /// [`SizeRequestMode`][crate::SizeRequestMode] that is [`SizeRequestMode::HeightForWidth`][crate::SizeRequestMode::HeightForWidth] or
    /// [`SizeRequestMode::WidthForHeight`][crate::SizeRequestMode::WidthForHeight]. However, every widget and container
    /// must be able to respond to the APIs for both dimensions, i.e. even if a
    /// widget has a request mode that is height-for-width, it is possible that
    /// its parent will request its sizes using the width-for-height APIs.
    ///
    /// To ensure that everything works properly, here are some guidelines to follow
    /// when implementing height-for-width (or width-for-height) containers.
    ///
    /// Each request mode involves 2 virtual methods. Height-for-width apis run
    /// through [`WidgetExt::preferred_width()`][crate::prelude::WidgetExt::preferred_width()] and then through [`WidgetExt::preferred_height_for_width()`][crate::prelude::WidgetExt::preferred_height_for_width()].
    /// When handling requests in the opposite [`SizeRequestMode`][crate::SizeRequestMode] it is important that
    /// every widget request at least enough space to display all of its content at all times.
    ///
    /// When [`WidgetExt::preferred_height()`][crate::prelude::WidgetExt::preferred_height()] is called on a container that is height-for-width,
    /// the container must return the height for its minimum width. This is easily achieved by
    /// simply calling the reverse apis implemented for itself as follows:
    ///
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// static void
    /// foo_container_get_preferred_height (GtkWidget *widget,
    ///                                     gint *min_height,
    ///                                     gint *nat_height)
    /// {
    ///    if (i_am_in_height_for_width_mode)
    ///      {
    ///        gint min_width;
    ///
    ///        GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget,
    ///                                                            &min_width,
    ///                                                            NULL);
    ///        GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width
    ///                                                           (widget,
    ///                                                            min_width,
    ///                                                            min_height,
    ///                                                            nat_height);
    ///      }
    ///    else
    ///      {
    ///        ... many containers support both request modes, execute the
    ///        real width-for-height request here by returning the
    ///        collective heights of all widgets that are stacked
    ///        vertically (or whatever is appropriate for this container)
    ///        ...
    ///      }
    /// }
    /// ```
    ///
    /// Similarly, when [`WidgetExt::preferred_width_for_height()`][crate::prelude::WidgetExt::preferred_width_for_height()] is called for a container or widget
    /// that is height-for-width, it then only needs to return the base minimum width like so:
    ///
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// static void
    /// foo_container_get_preferred_width_for_height (GtkWidget *widget,
    ///                                               gint for_height,
    ///                                               gint *min_width,
    ///                                               gint *nat_width)
    /// {
    ///    if (i_am_in_height_for_width_mode)
    ///      {
    ///        GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget,
    ///                                                            min_width,
    ///                                                            nat_width);
    ///      }
    ///    else
    ///      {
    ///        ... execute the real width-for-height request here based on
    ///        the required width of the children collectively if the
    ///        container were to be allocated the said height ...
    ///      }
    /// }
    /// ```
    ///
    /// Height for width requests are generally implemented in terms of a virtual allocation
    /// of widgets in the input orientation. Assuming an height-for-width request mode, a container
    /// would implement the `get_preferred_height_for_width()` virtual function by first calling
    /// [`WidgetExt::preferred_width()`][crate::prelude::WidgetExt::preferred_width()] for each of its children.
    ///
    /// For each potential group of children that are lined up horizontally, the values returned by
    /// [`WidgetExt::preferred_width()`][crate::prelude::WidgetExt::preferred_width()] should be collected in an array of `GtkRequestedSize` structures.
    /// Any child spacing should be removed from the input `for_width` and then the collective size should be
    /// allocated using the `gtk_distribute_natural_allocation()` convenience function.
    ///
    /// The container will then move on to request the preferred height for each child by using
    /// [`WidgetExt::preferred_height_for_width()`][crate::prelude::WidgetExt::preferred_height_for_width()] and using the sizes stored in the `GtkRequestedSize` array.
    ///
    /// To allocate a height-for-width container, it’s again important
    /// to consider that a container must prioritize one dimension over the other. So if
    /// a container is a height-for-width container it must first allocate all widgets horizontally
    /// using a `GtkRequestedSize` array and `gtk_distribute_natural_allocation()` and then add any
    /// extra space (if and where appropriate) for the widget to expand.
    ///
    /// After adding all the expand space, the container assumes it was allocated sufficient
    /// height to fit all of its content. At this time, the container must use the total horizontal sizes
    /// of each widget to request the height-for-width of each of its children and store the requests in a
    /// `GtkRequestedSize` array for any widgets that stack vertically (for tabular containers this can
    /// be generalized into the heights and widths of rows and columns).
    /// The vertical space must then again be distributed using `gtk_distribute_natural_allocation()`
    /// while this time considering the allocated height of the widget minus any vertical spacing
    /// that the container adds. Then vertical expand space should be added where appropriate and available
    /// and the container should go on to actually allocating the child widgets.
    ///
    /// See [GtkWidget’s geometry management section][geometry-management]
    /// to learn more about implementing height-for-width geometry management for widgets.
    ///
    /// # Child properties
    ///
    /// GtkContainer introduces child properties.
    /// These are object properties that are not specific
    /// to either the container or the contained widget, but rather to their relation.
    /// Typical examples of child properties are the position or pack-type of a widget
    /// which is contained in a [`Box`][crate::Box].
    ///
    /// Use `gtk_container_class_install_child_property()` to install child properties
    /// for a container class and `gtk_container_class_find_child_property()` or
    /// `gtk_container_class_list_child_properties()` to get information about existing
    /// child properties.
    ///
    /// To set the value of a child property, use `gtk_container_child_set_property()`,
    /// `gtk_container_child_set()` or `gtk_container_child_set_valist()`.
    /// To obtain the value of a child property, use
    /// `gtk_container_child_get_property()`, `gtk_container_child_get()` or
    /// `gtk_container_child_get_valist()`. To emit notification about child property
    /// changes, use [`WidgetExt::child_notify()`][crate::prelude::WidgetExt::child_notify()].
    ///
    /// # GtkContainer as GtkBuildable
    ///
    /// The GtkContainer implementation of the GtkBuildable interface supports
    /// a `<packing>` element for children, which can contain multiple `<property>`
    /// elements that specify child properties for the child.
    ///
    /// Since 2.16, child properties can also be marked as translatable using
    /// the same “translatable”, “comments” and “context” attributes that are used
    /// for regular properties.
    ///
    /// Since 3.16, containers can have a `<focus-chain>` element containing multiple
    /// `<widget>` elements, one for each child that should be added to the focus
    /// chain. The ”name” attribute gives the id of the widget.
    ///
    /// An example of these properties in UI definitions:
    ///
    /// ```text
    /// <object class="GtkBox">
    ///   <child>
    ///     <object class="GtkEntry" id="entry1"/>
    ///     <packing>
    ///       <property name="pack-type">start</property>
    ///     </packing>
    ///   </child>
    ///   <child>
    ///     <object class="GtkEntry" id="entry2"/>
    ///   </child>
    ///   <focus-chain>
    ///     <widget name="entry1"/>
    ///     <widget name="entry2"/>
    ///   </focus-chain>
    /// </object>
    /// ```
    ///
    /// This is an Abstract Base Class, you cannot instantiate it.
    ///
    /// # Implements
    ///
    /// [`ContainerExt`][trait@crate::prelude::ContainerExt], [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`BuildableExtManual`][trait@crate::prelude::BuildableExtManual]
    #[doc(alias = "GtkContainer")]
    pub struct Container(Object<ffi::GtkContainer, ffi::GtkContainerClass>) @extends Widget, @implements Buildable;

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

pub const NONE_CONTAINER: Option<&Container> = None;

/// Trait containing all [`struct@Container`] methods.
///
/// # Implementors
///
/// [`Bin`][struct@crate::Bin], [`Box`][struct@crate::Box], [`Container`][struct@crate::Container], [`Fixed`][struct@crate::Fixed], [`FlowBox`][struct@crate::FlowBox], [`Grid`][struct@crate::Grid], [`HeaderBar`][struct@crate::HeaderBar], [`IconView`][struct@crate::IconView], [`Layout`][struct@crate::Layout], [`ListBox`][struct@crate::ListBox], [`MenuShell`][struct@crate::MenuShell], [`Notebook`][struct@crate::Notebook], [`Paned`][struct@crate::Paned], [`Socket`][struct@crate::Socket], [`Stack`][struct@crate::Stack], [`TextView`][struct@crate::TextView], [`ToolItemGroup`][struct@crate::ToolItemGroup], [`ToolPalette`][struct@crate::ToolPalette], [`Toolbar`][struct@crate::Toolbar], [`TreeView`][struct@crate::TreeView]
pub trait ContainerExt: 'static {
    /// Adds `widget` to `self`. Typically used for simple containers
    /// such as [`Window`][crate::Window], [`Frame`][crate::Frame], or [`Button`][crate::Button]; for more complicated
    /// layout containers such as [`Box`][crate::Box] or [`Grid`][crate::Grid], this function will
    /// pick default packing parameters that may not be correct. So
    /// consider functions such as [`BoxExt::pack_start()`][crate::prelude::BoxExt::pack_start()] and
    /// [`GridExt::attach()`][crate::prelude::GridExt::attach()] as an alternative to [`add()`][Self::add()] in
    /// those cases. A widget may be added to only one container at a time;
    /// you can’t place the same widget inside two different containers.
    ///
    /// Note that some containers, such as [`ScrolledWindow`][crate::ScrolledWindow] or [`ListBox`][crate::ListBox],
    /// may add intermediate children between the added widget and the
    /// container.
    /// ## `widget`
    /// a widget to be placed inside `self`
    #[doc(alias = "gtk_container_add")]
    fn add<P: IsA<Widget>>(&self, widget: &P);

    //#[doc(alias = "gtk_container_add_with_properties")]
    //fn add_with_properties<P: IsA<Widget>>(&self, widget: &P, first_prop_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);

    #[doc(alias = "gtk_container_check_resize")]
    fn check_resize(&self);

    //#[doc(alias = "gtk_container_child_get")]
    //fn child_get<P: IsA<Widget>>(&self, child: &P, first_prop_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);

    //#[doc(alias = "gtk_container_child_get_valist")]
    //fn child_get_valist<P: IsA<Widget>>(&self, child: &P, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);

    /// Emits a `signal::Widget::child-notify` signal for the
    /// [child property][child-properties]
    /// `child_property` on the child.
    ///
    /// This is an analogue of [`ObjectExtManual::notify()`][crate::glib::prelude::ObjectExtManual::notify()] for child properties.
    ///
    /// Also see [`WidgetExt::child_notify()`][crate::prelude::WidgetExt::child_notify()].
    /// ## `child`
    /// the child widget
    /// ## `child_property`
    /// the name of a child property installed on
    ///  the class of `self`
    #[doc(alias = "gtk_container_child_notify")]
    fn child_notify<P: IsA<Widget>>(&self, child: &P, child_property: &str);

    /// Emits a `signal::Widget::child-notify` signal for the
    /// [child property][child-properties] specified by
    /// `pspec` on the child.
    ///
    /// This is an analogue of [`ObjectExtManual::notify_by_pspec()`][crate::glib::prelude::ObjectExtManual::notify_by_pspec()] for child properties.
    /// ## `child`
    /// the child widget
    /// ## `pspec`
    /// the [`glib::ParamSpec`][crate::glib::ParamSpec] of a child property instealled on
    ///  the class of `self`
    #[doc(alias = "gtk_container_child_notify_by_pspec")]
    fn child_notify_by_pspec<P: IsA<Widget>>(&self, child: &P, pspec: &glib::ParamSpec);

    //#[doc(alias = "gtk_container_child_set")]
    //fn child_set<P: IsA<Widget>>(&self, child: &P, first_prop_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);

    //#[doc(alias = "gtk_container_child_set_valist")]
    //fn child_set_valist<P: IsA<Widget>>(&self, child: &P, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);

    /// Returns the type of the children supported by the container.
    ///
    /// Note that this may return `G_TYPE_NONE` to indicate that no more
    /// children can be added, e.g. for a [`Paned`][crate::Paned] which already has two
    /// children.
    ///
    /// # Returns
    ///
    /// a `GType`.
    #[doc(alias = "gtk_container_child_type")]
    fn child_type(&self) -> glib::types::Type;

    /// Invokes `callback` on each direct child of `self`, including
    /// children that are considered “internal” (implementation details
    /// of the container). “Internal” children generally weren’t added
    /// by the user of the container, but were added by the container
    /// implementation itself.
    ///
    /// Most applications should use [`foreach()`][Self::foreach()], rather
    /// than [`forall()`][Self::forall()].
    /// ## `callback`
    /// a callback
    /// ## `callback_data`
    /// callback user data
    #[doc(alias = "gtk_container_forall")]
    fn forall<P: FnMut(&Widget)>(&self, callback: P);

    /// Invokes `callback` on each non-internal child of `self`.
    /// See [`forall()`][Self::forall()] for details on what constitutes
    /// an “internal” child. For all practical purposes, this function
    /// should iterate over precisely those child widgets that were
    /// added to the container by the application with explicit `add()`
    /// calls.
    ///
    /// It is permissible to remove the child from the `callback` handler.
    ///
    /// Most applications should use [`foreach()`][Self::foreach()],
    /// rather than [`forall()`][Self::forall()].
    /// ## `callback`
    /// a callback
    /// ## `callback_data`
    /// callback user data
    #[doc(alias = "gtk_container_foreach")]
    fn foreach<P: FnMut(&Widget)>(&self, callback: P);

    /// Retrieves the border width of the container. See
    /// [`set_border_width()`][Self::set_border_width()].
    ///
    /// # Returns
    ///
    /// the current border width
    #[doc(alias = "gtk_container_get_border_width")]
    #[doc(alias = "get_border_width")]
    fn border_width(&self) -> u32;

    /// Returns the container’s non-internal children. See
    /// [`forall()`][Self::forall()] for details on what constitutes an "internal" child.
    ///
    /// # Returns
    ///
    /// a newly-allocated list of the container’s non-internal children.
    #[doc(alias = "gtk_container_get_children")]
    #[doc(alias = "get_children")]
    fn children(&self) -> Vec<Widget>;

    //#[cfg_attr(feature = "v3_24", deprecated = "Since 3.24")]
    //#[doc(alias = "gtk_container_get_focus_chain")]
    //#[doc(alias = "get_focus_chain")]
    //fn focus_chain(&self, focusable_widgets: /*Unimplemented*/Vec<Widget>) -> bool;

    /// Returns the current focus child widget inside `self`. This is not the
    /// currently focused widget. That can be obtained by calling
    /// [`GtkWindowExt::focus()`][crate::prelude::GtkWindowExt::focus()].
    ///
    /// # Returns
    ///
    /// The child widget which will receive the
    ///  focus inside `self` when the `self` is focused,
    ///  or [`None`] if none is set.
    #[doc(alias = "gtk_container_get_focus_child")]
    #[doc(alias = "get_focus_child")]
    fn focus_child(&self) -> Option<Widget>;

    /// Retrieves the horizontal focus adjustment for the container. See
    /// gtk_container_set_focus_hadjustment ().
    ///
    /// # Returns
    ///
    /// the horizontal focus adjustment, or [`None`] if
    ///  none has been set.
    #[doc(alias = "gtk_container_get_focus_hadjustment")]
    #[doc(alias = "get_focus_hadjustment")]
    fn focus_hadjustment(&self) -> Option<Adjustment>;

    /// Retrieves the vertical focus adjustment for the container. See
    /// [`set_focus_vadjustment()`][Self::set_focus_vadjustment()].
    ///
    /// # Returns
    ///
    /// the vertical focus adjustment, or
    ///  [`None`] if none has been set.
    #[doc(alias = "gtk_container_get_focus_vadjustment")]
    #[doc(alias = "get_focus_vadjustment")]
    fn focus_vadjustment(&self) -> Option<Adjustment>;

    /// Returns a newly created widget path representing all the widget hierarchy
    /// from the toplevel down to and including `child`.
    /// ## `child`
    /// a child of `self`
    ///
    /// # Returns
    ///
    /// A newly created [`WidgetPath`][crate::WidgetPath]
    #[doc(alias = "gtk_container_get_path_for_child")]
    #[doc(alias = "get_path_for_child")]
    fn path_for_child<P: IsA<Widget>>(&self, child: &P) -> Option<WidgetPath>;

    /// When a container receives a call to the draw function, it must send
    /// synthetic `signal::Widget::draw` calls to all children that don’t have their
    /// own `GdkWindows`. This function provides a convenient way of doing this.
    /// A container, when it receives a call to its `signal::Widget::draw` function,
    /// calls [`propagate_draw()`][Self::propagate_draw()] once for each child, passing in
    /// the `cr` the container received.
    ///
    /// [`propagate_draw()`][Self::propagate_draw()] takes care of translating the origin of `cr`,
    /// and deciding whether the draw needs to be sent to the child. It is a
    /// convenient and optimized way of getting the same effect as calling
    /// [`WidgetExt::draw()`][crate::prelude::WidgetExt::draw()] on the child directly.
    ///
    /// In most cases, a container can simply either inherit the
    /// `signal::Widget::draw` implementation from [`Container`][crate::Container], or do some drawing
    /// and then chain to the ::draw implementation from [`Container`][crate::Container].
    /// ## `child`
    /// a child of `self`
    /// ## `cr`
    /// Cairo context as passed to the container. If you want to use `cr`
    ///  in container’s draw function, consider using `cairo_save()` and
    ///  `cairo_restore()` before calling this function.
    #[doc(alias = "gtk_container_propagate_draw")]
    fn propagate_draw<P: IsA<Widget>>(&self, child: &P, cr: &cairo::Context);

    /// Removes `widget` from `self`. `widget` must be inside `self`.
    /// Note that `self` will own a reference to `widget`, and that this
    /// may be the last reference held; so removing a widget from its
    /// container can destroy that widget. If you want to use `widget`
    /// again, you need to add a reference to it before removing it from
    /// a container, using `g_object_ref()`. If you don’t want to use `widget`
    /// again it’s usually more efficient to simply destroy it directly
    /// using `gtk_widget_destroy()` since this will remove it from the
    /// container and help break any circular reference count cycles.
    /// ## `widget`
    /// a current child of `self`
    #[doc(alias = "gtk_container_remove")]
    fn remove<P: IsA<Widget>>(&self, widget: &P);

    /// Sets the border width of the container.
    ///
    /// The border width of a container is the amount of space to leave
    /// around the outside of the container. The only exception to this is
    /// [`Window`][crate::Window]; because toplevel windows can’t leave space outside,
    /// they leave the space inside. The border is added on all sides of
    /// the container. To add space to only one side, use a specific
    /// `property::Widget::margin` property on the child widget, for example
    /// `property::Widget::margin-top`.
    /// ## `border_width`
    /// amount of blank space to leave outside
    ///  the container. Valid values are in the range 0-65535 pixels.
    #[doc(alias = "gtk_container_set_border_width")]
    fn set_border_width(&self, border_width: u32);

    /// Sets a focus chain, overriding the one computed automatically by GTK+.
    ///
    /// In principle each widget in the chain should be a descendant of the
    /// container, but this is not enforced by this method, since it’s allowed
    /// to set the focus chain before you pack the widgets, or have a widget
    /// in the chain that isn’t always packed. The necessary checks are done
    /// when the focus chain is actually traversed.
    ///
    /// # Deprecated since 3.24
    ///
    /// For overriding focus behavior, use the
    ///  GtkWidgetClass::focus signal.
    /// ## `focusable_widgets`
    ///
    ///  the new focus chain
    #[cfg_attr(feature = "v3_24", deprecated = "Since 3.24")]
    #[doc(alias = "gtk_container_set_focus_chain")]
    fn set_focus_chain(&self, focusable_widgets: &[Widget]);

    /// Sets, or unsets if `child` is [`None`], the focused child of `self`.
    ///
    /// This function emits the GtkContainer::set_focus_child signal of
    /// `self`. Implementations of [`Container`][crate::Container] can override the
    /// default behaviour by overriding the class closure of this signal.
    ///
    /// This is function is mostly meant to be used by widgets. Applications can use
    /// [`WidgetExt::grab_focus()`][crate::prelude::WidgetExt::grab_focus()] to manually set the focus to a specific widget.
    /// ## `child`
    /// a [`Widget`][crate::Widget], or [`None`]
    #[doc(alias = "gtk_container_set_focus_child")]
    fn set_focus_child<P: IsA<Widget>>(&self, child: Option<&P>);

    /// Hooks up an adjustment to focus handling in a container, so when a child
    /// of the container is focused, the adjustment is scrolled to show that
    /// widget. This function sets the horizontal alignment.
    /// See [`ScrolledWindowExt::hadjustment()`][crate::prelude::ScrolledWindowExt::hadjustment()] for a typical way of obtaining
    /// the adjustment and [`set_focus_vadjustment()`][Self::set_focus_vadjustment()] for setting
    /// the vertical adjustment.
    ///
    /// The adjustments have to be in pixel units and in the same coordinate
    /// system as the allocation for immediate children of the container.
    /// ## `adjustment`
    /// an adjustment which should be adjusted when the focus is
    ///  moved among the descendents of `self`
    #[doc(alias = "gtk_container_set_focus_hadjustment")]
    fn set_focus_hadjustment<P: IsA<Adjustment>>(&self, adjustment: &P);

    /// Hooks up an adjustment to focus handling in a container, so when a
    /// child of the container is focused, the adjustment is scrolled to
    /// show that widget. This function sets the vertical alignment. See
    /// [`ScrolledWindowExt::vadjustment()`][crate::prelude::ScrolledWindowExt::vadjustment()] for a typical way of obtaining
    /// the adjustment and [`set_focus_hadjustment()`][Self::set_focus_hadjustment()] for setting
    /// the horizontal adjustment.
    ///
    /// The adjustments have to be in pixel units and in the same coordinate
    /// system as the allocation for immediate children of the container.
    /// ## `adjustment`
    /// an adjustment which should be adjusted when the focus
    ///  is moved among the descendents of `self`
    #[doc(alias = "gtk_container_set_focus_vadjustment")]
    fn set_focus_vadjustment<P: IsA<Adjustment>>(&self, adjustment: &P);

    /// Removes a focus chain explicitly set with [`set_focus_chain()`][Self::set_focus_chain()].
    ///
    /// # Deprecated since 3.24
    ///
    /// For overriding focus behavior, use the
    ///  GtkWidgetClass::focus signal.
    #[cfg_attr(feature = "v3_24", deprecated = "Since 3.24")]
    #[doc(alias = "gtk_container_unset_focus_chain")]
    fn unset_focus_chain(&self);

    fn set_child<P: IsA<Widget>>(&self, child: Option<&P>);

    #[doc(alias = "resize-mode")]
    fn resize_mode(&self) -> ResizeMode;

    #[doc(alias = "resize-mode")]
    fn set_resize_mode(&self, resize_mode: ResizeMode);

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

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

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

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

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

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

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

impl<O: IsA<Container>> ContainerExt for O {
    fn add<P: IsA<Widget>>(&self, widget: &P) {
        unsafe {
            ffi::gtk_container_add(
                self.as_ref().to_glib_none().0,
                widget.as_ref().to_glib_none().0,
            );
        }
    }

    //fn add_with_properties<P: IsA<Widget>>(&self, widget: &P, first_prop_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
    //    unsafe { TODO: call ffi:gtk_container_add_with_properties() }
    //}

    fn check_resize(&self) {
        unsafe {
            ffi::gtk_container_check_resize(self.as_ref().to_glib_none().0);
        }
    }

    //fn child_get<P: IsA<Widget>>(&self, child: &P, first_prop_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
    //    unsafe { TODO: call ffi:gtk_container_child_get() }
    //}

    //fn child_get_valist<P: IsA<Widget>>(&self, child: &P, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
    //    unsafe { TODO: call ffi:gtk_container_child_get_valist() }
    //}

    fn child_notify<P: IsA<Widget>>(&self, child: &P, child_property: &str) {
        unsafe {
            ffi::gtk_container_child_notify(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                child_property.to_glib_none().0,
            );
        }
    }

    fn child_notify_by_pspec<P: IsA<Widget>>(&self, child: &P, pspec: &glib::ParamSpec) {
        unsafe {
            ffi::gtk_container_child_notify_by_pspec(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                pspec.to_glib_none().0,
            );
        }
    }

    //fn child_set<P: IsA<Widget>>(&self, child: &P, first_prop_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
    //    unsafe { TODO: call ffi:gtk_container_child_set() }
    //}

    //fn child_set_valist<P: IsA<Widget>>(&self, child: &P, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
    //    unsafe { TODO: call ffi:gtk_container_child_set_valist() }
    //}

    fn child_type(&self) -> glib::types::Type {
        unsafe {
            from_glib(ffi::gtk_container_child_type(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn forall<P: FnMut(&Widget)>(&self, callback: P) {
        let callback_data: P = callback;
        unsafe extern "C" fn callback_func<P: FnMut(&Widget)>(
            widget: *mut ffi::GtkWidget,
            data: glib::ffi::gpointer,
        ) {
            let widget = from_glib_borrow(widget);
            let callback: *mut P = data as *const _ as usize as *mut P;
            (*callback)(&widget);
        }
        let callback = Some(callback_func::<P> as _);
        let super_callback0: &P = &callback_data;
        unsafe {
            ffi::gtk_container_forall(
                self.as_ref().to_glib_none().0,
                callback,
                super_callback0 as *const _ as usize as *mut _,
            );
        }
    }

    fn foreach<P: FnMut(&Widget)>(&self, callback: P) {
        let callback_data: P = callback;
        unsafe extern "C" fn callback_func<P: FnMut(&Widget)>(
            widget: *mut ffi::GtkWidget,
            data: glib::ffi::gpointer,
        ) {
            let widget = from_glib_borrow(widget);
            let callback: *mut P = data as *const _ as usize as *mut P;
            (*callback)(&widget);
        }
        let callback = Some(callback_func::<P> as _);
        let super_callback0: &P = &callback_data;
        unsafe {
            ffi::gtk_container_foreach(
                self.as_ref().to_glib_none().0,
                callback,
                super_callback0 as *const _ as usize as *mut _,
            );
        }
    }

    fn border_width(&self) -> u32 {
        unsafe { ffi::gtk_container_get_border_width(self.as_ref().to_glib_none().0) }
    }

    fn children(&self) -> Vec<Widget> {
        unsafe {
            FromGlibPtrContainer::from_glib_container(ffi::gtk_container_get_children(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    //fn focus_chain(&self, focusable_widgets: /*Unimplemented*/Vec<Widget>) -> bool {
    //    unsafe { TODO: call ffi:gtk_container_get_focus_chain() }
    //}

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

    fn focus_hadjustment(&self) -> Option<Adjustment> {
        unsafe {
            from_glib_none(ffi::gtk_container_get_focus_hadjustment(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn focus_vadjustment(&self) -> Option<Adjustment> {
        unsafe {
            from_glib_none(ffi::gtk_container_get_focus_vadjustment(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn path_for_child<P: IsA<Widget>>(&self, child: &P) -> Option<WidgetPath> {
        unsafe {
            from_glib_full(ffi::gtk_container_get_path_for_child(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
            ))
        }
    }

    fn propagate_draw<P: IsA<Widget>>(&self, child: &P, cr: &cairo::Context) {
        unsafe {
            ffi::gtk_container_propagate_draw(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                mut_override(cr.to_glib_none().0),
            );
        }
    }

    fn remove<P: IsA<Widget>>(&self, widget: &P) {
        unsafe {
            ffi::gtk_container_remove(
                self.as_ref().to_glib_none().0,
                widget.as_ref().to_glib_none().0,
            );
        }
    }

    fn set_border_width(&self, border_width: u32) {
        unsafe {
            ffi::gtk_container_set_border_width(self.as_ref().to_glib_none().0, border_width);
        }
    }

    fn set_focus_chain(&self, focusable_widgets: &[Widget]) {
        unsafe {
            ffi::gtk_container_set_focus_chain(
                self.as_ref().to_glib_none().0,
                focusable_widgets.to_glib_none().0,
            );
        }
    }

    fn set_focus_child<P: IsA<Widget>>(&self, child: Option<&P>) {
        unsafe {
            ffi::gtk_container_set_focus_child(
                self.as_ref().to_glib_none().0,
                child.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    fn set_focus_hadjustment<P: IsA<Adjustment>>(&self, adjustment: &P) {
        unsafe {
            ffi::gtk_container_set_focus_hadjustment(
                self.as_ref().to_glib_none().0,
                adjustment.as_ref().to_glib_none().0,
            );
        }
    }

    fn set_focus_vadjustment<P: IsA<Adjustment>>(&self, adjustment: &P) {
        unsafe {
            ffi::gtk_container_set_focus_vadjustment(
                self.as_ref().to_glib_none().0,
                adjustment.as_ref().to_glib_none().0,
            );
        }
    }

    fn unset_focus_chain(&self) {
        unsafe {
            ffi::gtk_container_unset_focus_chain(self.as_ref().to_glib_none().0);
        }
    }

    fn set_child<P: IsA<Widget>>(&self, child: Option<&P>) {
        unsafe {
            glib::gobject_ffi::g_object_set_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"child\0".as_ptr() as *const _,
                child.to_value().to_glib_none().0,
            );
        }
    }

    fn resize_mode(&self) -> ResizeMode {
        unsafe {
            let mut value = glib::Value::from_type(<ResizeMode as StaticType>::static_type());
            glib::gobject_ffi::g_object_get_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"resize-mode\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value
                .get()
                .expect("Return Value for property `resize-mode` getter")
        }
    }

    fn set_resize_mode(&self, resize_mode: ResizeMode) {
        unsafe {
            glib::gobject_ffi::g_object_set_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"resize-mode\0".as_ptr() as *const _,
                resize_mode.to_value().to_glib_none().0,
            );
        }
    }

    fn connect_add<F: Fn(&Self, &Widget) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn add_trampoline<P: IsA<Container>, F: Fn(&P, &Widget) + 'static>(
            this: *mut ffi::GtkContainer,
            object: *mut ffi::GtkWidget,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                Container::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(object),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"add\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    add_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_check_resize<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn check_resize_trampoline<P: IsA<Container>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkContainer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Container::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"check-resize\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    check_resize_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_remove<F: Fn(&Self, &Widget) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn remove_trampoline<P: IsA<Container>, F: Fn(&P, &Widget) + 'static>(
            this: *mut ffi::GtkContainer,
            object: *mut ffi::GtkWidget,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                Container::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(object),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"remove\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    remove_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_set_focus_child<F: Fn(&Self, &Widget) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn set_focus_child_trampoline<
            P: IsA<Container>,
            F: Fn(&P, &Widget) + 'static,
        >(
            this: *mut ffi::GtkContainer,
            object: *mut ffi::GtkWidget,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                Container::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(object),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"set-focus-child\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    set_focus_child_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

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

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

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

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