Package org.eclipse.swt.dnd
Class TreeDragSourceEffect
- java.lang.Object
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- org.eclipse.swt.dnd.DragSourceAdapter
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- org.eclipse.swt.dnd.DragSourceEffect
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- org.eclipse.swt.dnd.TreeDragSourceEffect
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- All Implemented Interfaces:
EventListener,DragSourceListener,SWTEventListener
public class TreeDragSourceEffect extends DragSourceEffect
This class provides default implementations to display a source image when a drag is initiated from aTree.Classes that wish to provide their own source image for a
Subclasses that override any methods of this class must call the correspondingTreecan extendTreeDragSourceEffectclass and override theTreeDragSourceEffect.dragStartmethod and set the fieldDragSourceEvent.imagewith their own image.supermethod to get the default drag under effect implementation.- Since:
- 3.3
- See Also:
DragSourceEffect,DragSourceEvent, Sample code and further information
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Constructor Summary
Constructors Constructor Description TreeDragSourceEffect(Tree tree)Creates a newTreeDragSourceEffectto handle drag effect from the specifiedTree.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voiddragFinished(DragSourceEvent event)This implementation ofdragFinisheddisposes the image that was created inTreeDragSourceEffect.dragStart.voiddragStart(DragSourceEvent event)This implementation ofdragStartwill create a default image that will be used during the drag.-
Methods inherited from class org.eclipse.swt.dnd.DragSourceEffect
getControl
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Methods inherited from class org.eclipse.swt.dnd.DragSourceAdapter
dragSetData
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Constructor Detail
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TreeDragSourceEffect
public TreeDragSourceEffect(Tree tree)
Creates a newTreeDragSourceEffectto handle drag effect from the specifiedTree.- Parameters:
tree- theTreethat the user clicks on to initiate the drag
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Method Detail
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dragFinished
public void dragFinished(DragSourceEvent event)
This implementation ofdragFinisheddisposes the image that was created inTreeDragSourceEffect.dragStart. Subclasses that override this method should callsuper.dragFinished(event)to dispose the image in the default implementation.- Specified by:
dragFinishedin interfaceDragSourceListener- Overrides:
dragFinishedin classDragSourceAdapter- Parameters:
event- the information associated with the drag finished event- See Also:
DragSourceEvent
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dragStart
public void dragStart(DragSourceEvent event)
This implementation ofdragStartwill create a default image that will be used during the drag. The image should be disposed when the drag is completed in theTreeDragSourceEffect.dragFinishedmethod. Subclasses that override this method should callsuper.dragStart(event)to use the image from the default implementation.- Specified by:
dragStartin interfaceDragSourceListener- Overrides:
dragStartin classDragSourceAdapter- Parameters:
event- the information associated with the drag start event- See Also:
DragSourceEvent
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