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 correspondingTree
can extendTreeDragSourceEffect
class and override theTreeDragSourceEffect.dragStart
method and set the fieldDragSourceEvent.image
with their own image.super
method 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 newTreeDragSourceEffect
to handle drag effect from the specifiedTree
.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
dragFinished(DragSourceEvent event)
This implementation ofdragFinished
disposes the image that was created inTreeDragSourceEffect.dragStart
.void
dragStart(DragSourceEvent event)
This implementation ofdragStart
will 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 newTreeDragSourceEffect
to handle drag effect from the specifiedTree
.- Parameters:
tree
- theTree
that 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 ofdragFinished
disposes 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:
dragFinished
in interfaceDragSourceListener
- Overrides:
dragFinished
in 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 ofdragStart
will create a default image that will be used during the drag. The image should be disposed when the drag is completed in theTreeDragSourceEffect.dragFinished
method. Subclasses that override this method should callsuper.dragStart(event)
to use the image from the default implementation.- Specified by:
dragStart
in interfaceDragSourceListener
- Overrides:
dragStart
in classDragSourceAdapter
- Parameters:
event
- the information associated with the drag start event- See Also:
DragSourceEvent
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