Method

GtkWidgetkeynav_failed

Declaration [src]

gboolean
gtk_widget_keynav_failed (
  GtkWidget* widget,
  GtkDirectionType direction
)

Description [src]

This function should be called whenever keyboard navigation within a single widget hits a boundary. The function emits the GtkWidget::keynav-failed signal on the widget and its return value should be interpreted in a way similar to the return value of gtk_widget_child_focus():

When TRUE is returned, stay in the widget, the failed keyboard navigation is OK and/or there is nowhere we can/should move the focus to.

When FALSE is returned, the caller should continue with keyboard navigation outside the widget, e.g. by calling gtk_widget_child_focus() on the widget’s toplevel.

The default ::keynav-failed handler returns FALSE for GTK_DIR_TAB_FORWARD and GTK_DIR_TAB_BACKWARD. For the other values of GtkDirectionType it returns TRUE.

Whenever the default handler returns TRUE, it also calls gtk_widget_error_bell() to notify the user of the failed keyboard navigation.

A use case for providing an own implementation of ::keynav-failed (either by connecting to it or by overriding it) would be a row of GtkEntry widgets where the user should be able to navigate the entire row with the cursor keys, as e.g. known from user interfaces that require entering license keys.

Available since:2.12

Parameters

direction GtkDirectionType
 

Direction of focus movement.

Return value

Returns: gboolean
 

TRUE if stopping keyboard navigation is fine, FALSE if the emitting widget should try to handle the keyboard navigation attempt in its parent container(s).