org.eclipse.swt.dnd
Class TreeDragSourceEffect
java.lang.Object
org.eclipse.swt.dnd.DragSourceAdapter
org.eclipse.swt.dnd.DragSourceEffect
org.eclipse.swt.dnd.TreeDragSourceEffect
-
All Implemented Interfaces:
-
EventListener,
DragSourceListener, org.eclipse.swt.internal.SWTEventListener
-
public class TreeDragSourceEffect
- extends
DragSourceEffect
This class provides default implementations to display a source image
when a drag is initiated from a Tree
.
Classes that wish to provide their own source image for a Tree
can
extend TreeDragSourceEffect
class and override the TreeDragSourceEffect.dragStart
method and set the field DragSourceEvent.image
with their own image.
Subclasses that override any methods of this class must call the corresponding
super
method to get the default drag under effect implementation.
-
Since:
- 3.3
-
See Also:
-
DragSourceEffect
,
DragSourceEvent
,
Sample code and further information
Constructor Summary
|
TreeDragSourceEffect
(
Tree tree)
Creates a new TreeDragSourceEffect to handle drag effect
from the specified Tree . |
Method Summary
|
void
|
dragFinished
(
DragSourceEvent event)
This implementation of dragFinished disposes the image
that was created in TreeDragSourceEffect.dragStart . |
void
|
dragStart
(
DragSourceEvent event)
This implementation of dragStart will create a default
image that will be used during the drag. |
Methods inherited from class java.lang.
Object
|
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
|
TreeDragSourceEffect
public TreeDragSourceEffect(
Tree tree)
- Creates a new
TreeDragSourceEffect
to handle drag effect
from the specified Tree
.
-
Parameters:
-
tree
- the Tree
that the user clicks on to initiate the drag
dragFinished
public void dragFinished(
DragSourceEvent event)
- This implementation of
dragFinished
disposes the image
that was created in TreeDragSourceEffect.dragStart
.
Subclasses that override this method should call super.dragFinished(event)
to dispose the image in the default implementation.
-
-
Specified by:
-
dragFinished
in interface
DragSourceListener
-
Overrides:
-
dragFinished
in class
DragSourceAdapter
-
-
Parameters:
-
event
- the information associated with the drag finished event -
See Also:
-
DragSourceEvent
dragStart
public void dragStart(
DragSourceEvent event)
- This implementation of
dragStart
will create a default
image that will be used during the drag. The image should be disposed
when the drag is completed in the TreeDragSourceEffect.dragFinished
method.
Subclasses that override this method should call super.dragStart(event)
to use the image from the default implementation.
-
-
Specified by:
-
dragStart
in interface
DragSourceListener
-
Overrides:
-
dragStart
in class
DragSourceAdapter
-
-
Parameters:
-
event
- the information associated with the drag start event -
See Also:
-
DragSourceEvent
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