DragSourceListener
interface. dragStart
is called when the user has begun the actions required to drag the widget. This event gives the application the chance to decide if a drag should be started. dragSetData
is called when the data is required from the drag source. dragFinished
is called when the drop has successfully completed (mouse up over a valid target) or has been terminated (such as hitting the ESC key). Perform cleanup such as removing data from the source side on a successful move operation.
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