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Assigns a delegate to the buttonDropDown event.
Syntax
public final void addOnButtonDropDown( ToolBarButtonClickEventHandler value )
Parameters
value
The ToolBarButtonClickEventHandler to notify when the event occurs.
Remarks
The buttonDropDown event occurs when the user clicks on a toolbar button that has the ToolBarButtonStyle.DROPDOWN style set.
See Also ToolBarButtonStyle, removeOnButtonDropDown