org.eclipse.swt.dnd
Class TreeDropTargetEffect
java.lang.Object
org.eclipse.swt.dnd.DropTargetAdapter
org.eclipse.swt.dnd.DropTargetEffect
org.eclipse.swt.dnd.TreeDropTargetEffect
-
All Implemented Interfaces:
-
EventListener,
DropTargetListener, org.eclipse.swt.internal.SWTEventListener
-
public class TreeDropTargetEffect
- extends
DropTargetEffect
This class provides a default drag under effect (eg. select, insert, scroll and expand)
when a drag occurs over a Tree
.
Classes that wish to provide their own drag under effect for a Tree
can extend the TreeDropTargetEffect
class and override any applicable methods
in TreeDropTargetEffect
to display their own drag under effect.
Subclasses that override any methods of this class must call the corresponding
super
method to get the default drag under effect implementation.
The feedback value is either one of the FEEDBACK constants defined in
class DND
which is applicable to instances of this class,
or it must be built by bitwise OR'ing together
(that is, using the int
"|" operator) two or more
of those DND
effect constants.
-
Feedback:
- FEEDBACK_SELECT, FEEDBACK_INSERT_BEFORE, FEEDBACK_INSERT_AFTER, FEEDBACK_EXPAND, FEEDBACK_SCROLL
Note: Only one of the styles FEEDBACK_SELECT, FEEDBACK_INSERT_BEFORE or
FEEDBACK_INSERT_AFTER may be specified.
-
Since:
- 3.3
-
See Also:
-
DropTargetAdapter
,
DropTargetEvent
,
Sample code and further information
Constructor Summary
|
TreeDropTargetEffect
(
Tree tree)
Creates a new TreeDropTargetEffect to handle the drag under effect on the specified
Tree . |
Method Summary
|
void
|
dragEnter
(
DropTargetEvent event)
This implementation of dragEnter provides a default drag under effect
for the feedback specified in event.feedback . |
void
|
dragLeave
(
DropTargetEvent event)
This implementation of dragLeave provides a default drag under effect
for the feedback specified in event.feedback . |
void
|
dragOver
(
DropTargetEvent event)
This implementation of dragOver provides a default drag under effect
for the feedback specified in event.feedback . |
Methods inherited from class java.lang.
Object
|
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
|
TreeDropTargetEffect
public TreeDropTargetEffect(
Tree tree)
- Creates a new
TreeDropTargetEffect
to handle the drag under effect on the specified
Tree
.
-
Parameters:
-
tree
- the Tree
over which the user positions the cursor to drop the data
dragEnter
public void dragEnter(
DropTargetEvent event)
- This implementation of
dragEnter
provides a default drag under effect
for the feedback specified in event.feedback
.
For additional information see DropTargetAdapter.dragEnter
.
Subclasses that override this method should call super.dragEnter(event)
to get the default drag under effect implementation.
-
-
Specified by:
-
dragEnter
in interface
DropTargetListener
-
Overrides:
-
dragEnter
in class
DropTargetAdapter
-
-
Parameters:
-
event
- the information associated with the drag enter event -
See Also:
-
DropTargetAdapter
,
DropTargetEvent
dragLeave
public void dragLeave(
DropTargetEvent event)
- This implementation of
dragLeave
provides a default drag under effect
for the feedback specified in event.feedback
.
For additional information see DropTargetAdapter.dragLeave
.
Subclasses that override this method should call super.dragLeave(event)
to get the default drag under effect implementation.
-
-
Specified by:
-
dragLeave
in interface
DropTargetListener
-
Overrides:
-
dragLeave
in class
DropTargetAdapter
-
-
Parameters:
-
event
- the information associated with the drag leave event -
See Also:
-
DropTargetAdapter
,
DropTargetEvent
dragOver
public void dragOver(
DropTargetEvent event)
- This implementation of
dragOver
provides a default drag under effect
for the feedback specified in event.feedback
.
For additional information see DropTargetAdapter.dragOver
.
Subclasses that override this method should call super.dragOver(event)
to get the default drag under effect implementation.
-
-
Specified by:
-
dragOver
in interface
DropTargetListener
-
Overrides:
-
dragOver
in class
DropTargetAdapter
-
-
Parameters:
-
event
- the information associated with the drag over event -
See Also:
-
DropTargetAdapter
,
DropTargetEvent
,
DND.FEEDBACK_SELECT
,
DND.FEEDBACK_INSERT_BEFORE
,
DND.FEEDBACK_INSERT_AFTER
,
DND.FEEDBACK_SCROLL
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