EventControllerFocusSignalName

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 [propertyGtk.EventControllerFocus:is-focus] property for changes.

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 [propertyGtk.EventControllerFocus:is-focus] property for changes.

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Note that getting this signal doesn’t itself guarantee that the value of the property has actually changed. When it is emitted is determined by the derived GObject class. If the implementor did not create the property with G_PARAM_EXPLICIT_NOTIFY, then any call to g_object_set_property() results in notify being emitted, even if the new value is the same as the old. If they did pass G_PARAM_EXPLICIT_NOTIFY, then this signal is emitted only when they explicitly call g_object_notify() or g_object_notify_by_pspec(), and common practice is to do that only when the value has actually changed.

This signal is typically used to obtain change notification for a single property, by specifying the property name as a detail in the g_signal_connect() call, like this:

(C Language Example):

g_signal_connect (text_view->buffer, "notify::paste-target-list",
                  G_CALLBACK (gtk_text_view_target_list_notify),
                  text_view)

It is important to note that you must use canonical parameter names as detail strings for the notify signal.

true if focus is contained in the controllers widget.

See [propertyGtk.EventControllerFocus:is-focus] for whether the focus is in the widget itself or inside a descendent.

When handling focus events, this property is updated before [signalGtk.EventControllerFocus::enter] or [signalGtk.EventControllerFocus::leave] are emitted.

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

See also [propertyGtk.EventControllerFocus:contains-focus].

When handling focus events, this property is updated before [signalGtk.EventControllerFocus::enter] or [signalGtk.EventControllerFocus::leave] are emitted.

The name for this controller, typically used for debugging purposes.

The limit for which events this controller will handle.

The propagation phase at which this controller will handle events.

The widget receiving the GdkEvents that the controller will handle.