Package org.eclipse.swt.dnd
Class TreeDropTargetEffect
- java.lang.Object
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- org.eclipse.swt.dnd.DropTargetAdapter
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- org.eclipse.swt.dnd.DropTargetEffect
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- org.eclipse.swt.dnd.TreeDropTargetEffect
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- All Implemented Interfaces:
EventListener
,DropTargetListener
,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 aTree
.Classes that wish to provide their own drag under effect for a
Subclasses that override any methods of this class must call the correspondingTree
can extend theTreeDropTargetEffect
class and override any applicable methods inTreeDropTargetEffect
to display their own drag under effect.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 theint
"|" operator) two or more of thoseDND
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
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Constructor Summary
Constructors Constructor Description TreeDropTargetEffect(Tree tree)
Creates a newTreeDropTargetEffect
to handle the drag under effect on the specifiedTree
.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
dragEnter(DropTargetEvent event)
This implementation ofdragEnter
provides a default drag under effect for the feedback specified inevent.feedback
.void
dragLeave(DropTargetEvent event)
This implementation ofdragLeave
provides a default drag under effect for the feedback specified inevent.feedback
.void
dragOver(DropTargetEvent event)
This implementation ofdragOver
provides a default drag under effect for the feedback specified inevent.feedback
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Methods inherited from class org.eclipse.swt.dnd.DropTargetEffect
getControl, getItem
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Methods inherited from class org.eclipse.swt.dnd.DropTargetAdapter
dragOperationChanged, drop, dropAccept
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Constructor Detail
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TreeDropTargetEffect
public TreeDropTargetEffect(Tree tree)
Creates a newTreeDropTargetEffect
to handle the drag under effect on the specifiedTree
.- Parameters:
tree
- theTree
over which the user positions the cursor to drop the data
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Method Detail
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dragEnter
public void dragEnter(DropTargetEvent event)
This implementation ofdragEnter
provides a default drag under effect for the feedback specified inevent.feedback
. For additional information seeDropTargetAdapter.dragEnter
. Subclasses that override this method should callsuper.dragEnter(event)
to get the default drag under effect implementation.- Specified by:
dragEnter
in interfaceDropTargetListener
- Overrides:
dragEnter
in classDropTargetAdapter
- Parameters:
event
- the information associated with the drag enter event- See Also:
DropTargetAdapter
,DropTargetEvent
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dragLeave
public void dragLeave(DropTargetEvent event)
This implementation ofdragLeave
provides a default drag under effect for the feedback specified inevent.feedback
. For additional information seeDropTargetAdapter.dragLeave
. Subclasses that override this method should callsuper.dragLeave(event)
to get the default drag under effect implementation.- Specified by:
dragLeave
in interfaceDropTargetListener
- Overrides:
dragLeave
in classDropTargetAdapter
- Parameters:
event
- the information associated with the drag leave event- See Also:
DropTargetAdapter
,DropTargetEvent
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dragOver
public void dragOver(DropTargetEvent event)
This implementation ofdragOver
provides a default drag under effect for the feedback specified inevent.feedback
. For additional information seeDropTargetAdapter.dragOver
. Subclasses that override this method should callsuper.dragOver(event)
to get the default drag under effect implementation.- Specified by:
dragOver
in interfaceDropTargetListener
- Overrides:
dragOver
in classDropTargetAdapter
- 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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