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

use crate::Accessible;
use crate::Buildable;
use crate::ConstraintTarget;
use crate::Native;
use crate::Widget;
use glib::object::IsA;
use glib::translate::*;
use std::fmt;

glib::wrapper! {
    /// [`Root`][crate::Root] is the interface implemented by all widgets that can act as a toplevel
    /// widget.
    ///
    /// The root widget takes care of providing the connection to the windowing system
    /// and manages layout, drawing and event delivery for its widget hierarchy.
    ///
    /// The obvious example of a [`Root`][crate::Root] is [`Window`][crate::Window].
    ///
    /// To get the display to which a [`Root`][crate::Root] belongs, use
    /// `Gtk::`Root::get_display()``.
    ///
    /// [`Root`][crate::Root] also maintains the location of keyboard focus inside its widget
    /// hierarchy, with [``RootExt::set_focus()``][crate::prelude::`RootExt::set_focus()`] and [``RootExt::focus()``][crate::prelude::`RootExt::focus()`].
    ///
    /// # Implements
    ///
    /// [`RootExt`][trait@crate::prelude::RootExt], [`NativeExt`][trait@crate::prelude::NativeExt], [`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 = "GtkRoot")]
    pub struct Root(Interface<ffi::GtkRoot, ffi::GtkRootInterface>) @requires Native, Widget, Accessible, Buildable, ConstraintTarget;

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

pub const NONE_ROOT: Option<&Root> = None;

/// Trait containing all [`struct@Root`] methods.
///
/// # Implementors
///
/// [`AboutDialog`][struct@crate::AboutDialog], [`AppChooserDialog`][struct@crate::AppChooserDialog], [`ApplicationWindow`][struct@crate::ApplicationWindow], [`Assistant`][struct@crate::Assistant], [`ColorChooserDialog`][struct@crate::ColorChooserDialog], [`Dialog`][struct@crate::Dialog], [`DragIcon`][struct@crate::DragIcon], [`FileChooserDialog`][struct@crate::FileChooserDialog], [`FontChooserDialog`][struct@crate::FontChooserDialog], [`MessageDialog`][struct@crate::MessageDialog], [`PageSetupUnixDialog`][struct@crate::PageSetupUnixDialog], [`PrintUnixDialog`][struct@crate::PrintUnixDialog], [`Root`][struct@crate::Root], [`ShortcutsWindow`][struct@crate::ShortcutsWindow], [`Window`][struct@crate::Window]
pub trait RootExt: 'static {
    /// Retrieves the current focused widget within the root.
    ///
    /// Note that this is the widget that would have the focus
    /// if the root is active; if the root is not focused then
    /// `gtk_widget_has_focus (widget)` will be [`false`] for the
    /// widget.
    ///
    /// # Returns
    ///
    /// the currently focused widget
    #[doc(alias = "gtk_root_get_focus")]
    #[doc(alias = "get_focus")]
    fn focus(&self) -> Option<Widget>;

    /// If `focus` is not the current focus widget, and is focusable, sets
    /// it as the focus widget for the root.
    ///
    /// If `focus` is [`None`], unsets the focus widget for the root.
    ///
    /// To set the focus to a particular widget in the root, it is usually
    /// more convenient to use [``WidgetExt::grab_focus()``][crate::prelude::`WidgetExt::grab_focus()`] instead of
    /// this function.
    /// ## `focus`
    /// widget to be the new focus widget, or [`None`]
    ///  to unset the focus widget
    #[doc(alias = "gtk_root_set_focus")]
    fn set_focus(&self, focus: Option<&impl IsA<Widget>>);
}

impl<O: IsA<Root>> RootExt for O {
    fn focus(&self) -> Option<Widget> {
        unsafe { from_glib_none(ffi::gtk_root_get_focus(self.as_ref().to_glib_none().0)) }
    }

    fn set_focus(&self, focus: Option<&impl IsA<Widget>>) {
        unsafe {
            ffi::gtk_root_set_focus(
                self.as_ref().to_glib_none().0,
                focus.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }
}

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