ComponentT.addFocusHandler

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

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template ComponentT(TStruct)
uint
addFocusHandler

Parameters

handler AtkFocusHandler

The AtkFocusHandler to be attached to component

Return Value

Type: uint

a handler id which can be used in atk_component_remove_focus_handler() or zero if the handler was already added.

Detailed Description

Deprecated: If you need to track when an object gains or lose the focus, use the state-change "focused" notification instead.