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TDrawDockImageEvent procedure type

In unit Controls

Event handler used to draw the docking image in a drag and dock operation.

Declaration

pascal
TDrawDockImageEvent = procedure(Sender: TObject; AOldRect: TRect; 
 ANewRect: TRect; 
 AOperation: TDockImageOperation)

Arguments

Sender

Object (TDragDockObject) for the event notification.

AOldRect

Rectangle with area cleared in the handler routine.

ANewRect

Rectangle with area drawn in the handler routine.

AOperation

Operation performed for the notification. Valid values are: disShow, disMove, disHide.

Description

TDrawDockImageEvent is an object procedure type which specifies an event handler used to draw the docking image for TDragDockObject instances. TDrawDockImageEvent is the type used to implement the OnDrawDockImage variable in the Controls unit.

See also

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.