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org.eclipse.swt.dnd
Interface DragSourceListener
- All Superinterfaces:
- java.util.EventListener, org.eclipse.swt.internal.SWTEventListener
- All Known Implementing Classes:
- DragSourceAdapter
- public interface DragSourceListener
- extends org.eclipse.swt.internal.SWTEventListener
The DragSourceListener class provides event notification to the application for DragSource events.
When the user drops data on a DropTarget, the application which defines the DragSource
must provide the dropped data by implementing dragSetData. In the dragSetData, the application
must support all the data types that were specified in the DragSource#setTransfer method.
After the drop has completed successfully or has been aborted, the application which defines the
DragSource is required to take the appropriate cleanup action. In the case of a successful
move operation, the application must remove the data that was transferred.
| Method Summary | |
void |
dragFinished(DragSourceEvent event)
The drop has successfully completed(mouse up over a valid target) or has been terminated (such as hitting the ESC key). |
void |
dragSetData(DragSourceEvent event)
The data is required from the drag source. |
void |
dragStart(DragSourceEvent event)
The user has begun the actions required to drag the widget. |
| Method Detail |
dragStart
public void dragStart(DragSourceEvent event)
- 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.
The following fields in the DragSourceEvent apply:
- (in)widget
- (in)time
- (in,out)doit
dragSetData
public void dragSetData(DragSourceEvent event)
- The data is required from the drag source.
The following fields in the DragSourceEvent apply:
- (in)widget
- (in)time
- (in)dataType - the type of data requested.
- (out)data - the application inserts the actual data here (must match the dataType)
dragFinished
public void dragFinished(DragSourceEvent event)
- 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.
The following fields in the DragSourceEvent apply:
- (in)widget
- (in)time
- (in)doit
- (in)detail
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