gtk.root_mixin
Module for [Root] interface mixin
Templates 2
[gtk.root.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 [gtk.root.Root] is [gtk.window.Window].
To get the display to which a [gtk.root.Root] belongs, use [gtk.root.Root.getDisplay].
[gtk.root.Root] also maintains the location of keyboard focus inside its widget hierarchy, with [gtk.root.Root.setFocus] and [gtk.root.Root.getFocus].
Returns the display that this [gtk.root.Root] is on.
Returns
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
If focus is not the current focus widget, and is focusable, sets it as the focus widget for the root.
If focus is null, 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 [gtk.widget.Widget.grabFocus] instead of this function.
Parameters
focus | widget to be the new focus widget, or null to unset the focus widget |