DropTargetListener

The <code>DropTargetListener</code> class provides event notification to the application for DropTarget events.

<p>As the user moves the cursor into, over and out of a Control that has been designated as a DropTarget, events indicate what operation can be performed and what data can be transferred if a drop where to occur at that point. The application can respond to these events and change the type of data that will be dropped by modifying event.currentDataType, or change the operation that will be performed by modifying the event.detail field or stop any drop from happening on the current target by setting the event.detail field to DND_DROP_NONE.</p>

<p>When the user causes a drop to happen by releasing the mouse over a valid drop target, the application has one last chance to change the data type of the drop through the DropAccept event. If the drop is still allowed, the DropAccept event is immediately followed by the Drop event. In the Drop event, the application can still change the operation that is performed but the data type is fixed.</p>

@see DropTargetEvent

interface DropTargetListener : SWTEventListener {

void dragEnter(DropTargetEvent event);

void dragLeave(DropTargetEvent event);

void dragOperationChanged(DropTargetEvent event);

void dragOver(DropTargetEvent event);

void drop(DropTargetEvent event);

void dropAccept(DropTargetEvent event);

}

Members

Functions

dragEnter void dragEnter(DropTargetEvent event): The cursor has entered the drop target boundaries.
dragLeave void dragLeave(DropTargetEvent event): The cursor has left the drop target boundaries OR the drop has been cancelled OR the data is about to be dropped.
dragOperationChanged void dragOperationChanged(DropTargetEvent event): The operation being performed has changed (usually due to the user changing the selected modifier key(s) while dragging).
dragOver void dragOver(DropTargetEvent event): The cursor is moving over the drop target.
drop void drop(DropTargetEvent event): The data is being dropped. The data field contains java format of the data being dropped. To determine the type of the data object, refer to the documentation for the Transfer subclass specified in event.currentDataType.
dropAccept void dropAccept(DropTargetEvent event): The drop is about to be performed. The drop target is given a last chance to change the nature of the drop.

DropTargetListener

Members

Functions

Meta

Source