com.allen_sauer.gwt.dnd.client.drop
Class BoundaryDropController

java.lang.Object
  com.allen_sauer.gwt.dnd.client.drop.AbstractDropController
      com.allen_sauer.gwt.dnd.client.drop.AbstractPositioningDropController
          com.allen_sauer.gwt.dnd.client.drop.AbsolutePositionDropController
              com.allen_sauer.gwt.dnd.client.drop.BoundaryDropController

All Implemented Interfaces:

DropController

public class BoundaryDropController
extends AbsolutePositionDropController

A DropController for the Panel which contains a given draggable widget.

Field Summary

Fields inherited from class com.allen_sauer.gwt.dnd.client.drop.AbsolutePositionDropController

dropTargetClientHeight, dropTargetClientWidth, dropTargetOffsetX, dropTargetOffsetY

Constructor Summary

BoundaryDropController(com.google.gwt.user.client.ui.AbsolutePanel dropTarget, boolean allowDroppingOnBoundaryPanel)

Method Summary

boolean	getBehaviorBoundaryPanelDrop() Whether or not dropping on the boundary panel is permitted.
void	onPreviewDrop(DragContext context) Called just prior to DropController.onDrop(DragContext) to allow the drop operation to be cancelled by throwing a VetoDragException.
void	setBehaviorBoundaryPanelDrop(boolean allowDroppingOnBoundaryPanel) Set whether or not widgets may be dropped anywhere on the boundary panel.

Methods inherited from class com.allen_sauer.gwt.dnd.client.drop.AbsolutePositionDropController

drop, getDraggableList, onDrop, onEnter, onLeave, onMove

Methods inherited from class com.allen_sauer.gwt.dnd.client.drop.AbstractDropController

getDropTarget

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BoundaryDropController

public BoundaryDropController(com.google.gwt.user.client.ui.AbsolutePanel dropTarget,
                              boolean allowDroppingOnBoundaryPanel)

Method Detail

getBehaviorBoundaryPanelDrop

public boolean getBehaviorBoundaryPanelDrop()

Whether or not dropping on the boundary panel is permitted.

Returns:

true if dropping on the boundary panel is allowed

onPreviewDrop

public void onPreviewDrop(DragContext context)
                   throws VetoDragException

Description copied from interface: DropController

Called just prior to DropController.onDrop(DragContext) to allow the drop operation to be cancelled by throwing a VetoDragException.

Specified by:

onPreviewDrop in interface DropController

Overrides:

onPreviewDrop in class AbstractDropController

Parameters:

context - the current drag context

Throws:

VetoDragException - if the proposed operation is unacceptable

setBehaviorBoundaryPanelDrop

public void setBehaviorBoundaryPanelDrop(boolean allowDroppingOnBoundaryPanel)

Set whether or not widgets may be dropped anywhere on the boundary panel. Set to false when you only want explicitly registered drop controllers to accept drops. Defaults to true.

Parameters:

allowDroppingOnBoundaryPanel - true to allow dropping