Warning
atk_component_add_focus_handler is deprecated and should not be used in newly-written code. This method is deprecated since ATK version 2.9.4. If
you need to track when an object gains or lose the focus, use
state-changed:focused notification instead.
Add the specified handler to the set of functions to be called
when this object receives focus events (in or out). If the handler is
already added it is not added again
Warning atk_component_add_focus_handler is deprecated and should not be used in newly-written code. This method is deprecated since ATK version 2.9.4. If you need to track when an object gains or lose the focus, use state-changed:focused notification instead. Add the specified handler to the set of functions to be called when this object receives focus events (in or out). If the handler is already added it is not added again