child_focus


Description:

public bool child_focus (DirectionType direction)

This function is used by custom widget implementations; if you're writing an app, you’d use grab_focus to move the focus to a particular widget.

child_focus is called by widgets as the user moves around the window using keyboard shortcuts. direction indicates what kind of motion is taking place (up, down, left, right, tab forward, tab backward). child_focus calls the focus vfunc; widgets override this vfunc in order to implement appropriate focus behavior.

The default focus vfunc for a widget should return true if moving in direction left the focus on a focusable location inside that widget, and false if moving in direction moved the focus outside the widget. If returning true, widgets normally call grab_focus to place the focus accordingly; if returning false, they don’t modify the current focus location.

Parameters:

this

a Widget

direction

direction of focus movement

Returns:

true if focus ended up inside this