Top Description Fields Constructors Methods
org.eclipse.swt.dnd

public Class TreeDropTargetEffect

extends DropTargetEffect
Class Inheritance
Imports
org.eclipse.swt.graphics.*, org.eclipse.swt.internal.*, org.eclipse.swt.internal.gtk.*, org.eclipse.swt.widgets.*
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

Field Summary

Modifier and TypeField and Description
pack-priv static final int
EXPAND_HYSTERESIS

pack-priv long
expandBeginTime

pack-priv int
expandIndex

pack-priv static final int
SCROLL_HYSTERESIS

pack-priv long
scrollBeginTime

pack-priv int
scrollIndex

Inherited from org.eclipse.swt.dnd.DropTargetEffect:
control

Constructor Summary

AccessConstructor and Description
public
TreeDropTargetEffect(Tree
the Tree over which the user positions the cursor to drop the data
tree)

Creates a new TreeDropTargetEffect to handle the drag under effect on the specified Tree.

Method Summary

Modifier and TypeMethod and Description
pack-priv int
checkEffect(int effect)

public void
dragEnter(DropTargetEvent
the information associated with the drag enter event
event)

Overrides org.eclipse.swt.dnd.DropTargetAdapter.dragEnter.

Implements org.eclipse.swt.dnd.DropTargetListener.dragEnter.

This implementation of dragEnter provides a default drag under effect for the feedback specified in event.feedback.
public void
dragLeave(DropTargetEvent
the information associated with the drag leave event
event)

Overrides org.eclipse.swt.dnd.DropTargetAdapter.dragLeave.

Implements org.eclipse.swt.dnd.DropTargetListener.dragLeave.

This implementation of dragLeave provides a default drag under effect for the feedback specified in event.feedback.
public void
dragOver(DropTargetEvent
the information associated with the drag over event
event)

Overrides org.eclipse.swt.dnd.DropTargetAdapter.dragOver.

Implements org.eclipse.swt.dnd.DropTargetListener.dragOver.

This implementation of dragOver provides a default drag under effect for the feedback specified in event.feedback.
Inherited from org.eclipse.swt.dnd.DropTargetEffect:
getControlgetItemgetItemgetItemnextItempreviousItem

Field Detail

EXPAND_HYSTERESISback to summary
pack-priv static final int EXPAND_HYSTERESIS
expandBeginTimeback to summary
pack-priv long expandBeginTime
expandIndexback to summary
pack-priv int expandIndex
SCROLL_HYSTERESISback to summary
pack-priv static final int SCROLL_HYSTERESIS
scrollBeginTimeback to summary
pack-priv long scrollBeginTime
scrollIndexback to summary
pack-priv int scrollIndex

Constructor Detail

TreeDropTargetEffectback to summary
public TreeDropTargetEffect(Tree tree)

Creates a new TreeDropTargetEffect to handle the drag under effect on the specified Tree.

Parameters
tree:Tree

the Tree over which the user positions the cursor to drop the data

Method Detail

checkEffectback to summary
pack-priv int checkEffect(int effect)
dragEnterback to summary
public void dragEnter(DropTargetEvent event)

Overrides org.eclipse.swt.dnd.DropTargetAdapter.dragEnter.

Implements org.eclipse.swt.dnd.DropTargetListener.dragEnter.

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.

Parameters
event:DropTargetEvent

the information associated with the drag enter event

Annotations
@Override
See Also
DropTargetAdapter, DropTargetEvent
dragLeaveback to summary
public void dragLeave(DropTargetEvent event)

Overrides org.eclipse.swt.dnd.DropTargetAdapter.dragLeave.

Implements org.eclipse.swt.dnd.DropTargetListener.dragLeave.

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.

Parameters
event:DropTargetEvent

the information associated with the drag leave event

Annotations
@Override
See Also
DropTargetAdapter, DropTargetEvent
dragOverback to summary
public void dragOver(DropTargetEvent event)

Overrides org.eclipse.swt.dnd.DropTargetAdapter.dragOver.

Implements org.eclipse.swt.dnd.DropTargetListener.dragOver.

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.

Parameters
event:DropTargetEvent

the information associated with the drag over event

Annotations
@Override
See Also
DropTargetAdapter, DropTargetEvent, DND#FEEDBACK_SELECT, DND#FEEDBACK_INSERT_BEFORE, DND#FEEDBACK_INSERT_AFTER, DND#FEEDBACK_SCROLL