EventControllerFocus

class EventControllerFocus(**properties: Any)

Superclasses: EventController, Object

GtkEventControllerFocus is an event controller to keep track of keyboard focus.

The event controller offers enter and leave signals, as well as is_focus and contains_focus properties which are updated to reflect focus changes inside the widget hierarchy that is rooted at the controllers widget.

Constructors

class EventControllerFocus

classmethod new() → EventController: Creates a new event controller that will handle focus events.

Methods

class EventControllerFocus

contains_focus() → bool: Returns True if focus is within self or one of its children.

is_focus() → bool: Returns True if focus is within self, but not one of its children.

Properties

class EventControllerFocus

props.contains_focus: bool

True if focus is contained in the controllers widget.

See is_focus for whether the focus is in the widget itself or inside a descendent.

When handling focus events, this property is updated before enter or leave are emitted.

props.is_focus: bool

True if focus is in the controllers widget itself, as opposed to in a descendent widget.

Signals

class EventControllerFocus.signals

enter() → None

Emitted whenever the focus enters into the widget or one of its descendents.

Note that this means you may not get an ::enter signal even though the widget becomes the focus location, in certain cases (such as when the focus moves from a descendent of the widget to the widget itself). If you are interested in these cases, you can monitor the is_focus property for changes.

leave() → None

Emitted whenever the focus leaves the widget hierarchy that is rooted at the widget that the controller is attached to.

Note that this means you may not get a ::leave signal even though the focus moves away from the widget, in certain cases (such as when the focus moves from the widget to a descendent). If you are interested in these cases, you can monitor the is_focus property for changes.