ch.unifr.pai.twice.dragndrop.client.intf
Class DropTargetHandlerAdapter

java.lang.Object
  ch.unifr.pai.twice.dragndrop.client.intf.DropTargetHandlerAdapter

All Implemented Interfaces:

DropTargetHandler

Direct Known Subclasses:

HighlightDropTargetHandler

public class DropTargetHandlerAdapter
extends java.lang.Object
implements DropTargetHandler

An adapter of the DropTargetHandler providing typical standard implementations and values

Author:

Oliver Schmid

Field Summary

private DropTargetHandlerFactory.Priority

p

Constructor Summary

DropTargetHandlerAdapter()

DropTargetHandlerAdapter(DropTargetHandlerFactory.Priority p)

Method Summary

DropTargetHandlerFactory.Priority	getPriority()
boolean	onDrop(java.lang.String deviceId, com.google.gwt.user.client.ui.Widget widget, com.google.gwt.dom.client.Element dragProxy, com.google.gwt.user.client.Event event, java.lang.Double intersectionPercentage, java.lang.Double intersectionPercentageWithTarget) Invoked when a widget is dropped above the drop target
void	onHover(java.lang.String deviceId, com.google.gwt.user.client.ui.Widget widget, com.google.gwt.dom.client.Element dragProxy, com.google.gwt.user.client.Event event, java.lang.Double intersectionPercentage, java.lang.Double intersectionPercentageWithTarget) Invoked when a widget hovers the drop target
void	onHoverEnd(java.lang.String deviceId, com.google.gwt.user.client.ui.Widget widget, com.google.gwt.dom.client.Element dragProxy, com.google.gwt.user.client.Event event) Invoked when a widget leaves the region of the drop target

Methods inherited from class java.lang.Object

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

Field Detail

p

private DropTargetHandlerFactory.Priority p

Constructor Detail

DropTargetHandlerAdapter

public DropTargetHandlerAdapter()

DropTargetHandlerAdapter

public DropTargetHandlerAdapter(DropTargetHandlerFactory.Priority p)

Method Detail

getPriority

public DropTargetHandlerFactory.Priority getPriority()

Specified by:

getPriority in interface DropTargetHandler

Returns:

the DropTargetHandlerFactory.Priority of the drop target

onDrop

public boolean onDrop(java.lang.String deviceId,
                      com.google.gwt.user.client.ui.Widget widget,
                      com.google.gwt.dom.client.Element dragProxy,
                      com.google.gwt.user.client.Event event,
                      java.lang.Double intersectionPercentage,
                      java.lang.Double intersectionPercentageWithTarget)

Description copied from interface: DropTargetHandler

Invoked when a widget is dropped above the drop target

Specified by:

onDrop in interface DropTargetHandler

Parameters:

deviceId - - the identifier of the device that triggered the drop

widget - - the widget which is dragged (this is the original widget and not the dragging proxy!)

dragProxy - - the HTML element of the proxy

event - - the event that has caused the invocation of the onEndOfDrop (e.g. a mouse up event)

intersectionPercentage - - the percentage of intersection with the drop target

Returns:

true if the drop shall be accepted, false if the drop shall be rejected

onHover

public void onHover(java.lang.String deviceId,
                    com.google.gwt.user.client.ui.Widget widget,
                    com.google.gwt.dom.client.Element dragProxy,
                    com.google.gwt.user.client.Event event,
                    java.lang.Double intersectionPercentage,
                    java.lang.Double intersectionPercentageWithTarget)

Description copied from interface: DropTargetHandler

Invoked when a widget hovers the drop target

Specified by:

onHover in interface DropTargetHandler

Parameters:

deviceId - - the identifier of the device that triggered the drop

widget - - the widget which is dragged (this is the original widget and not the dragging proxy!)

dragProxy - - the HTML element of the proxy

event - - the event that has caused the invocation of the onEndOfDrop (e.g. a mouse up event)

intersectionPercentage - - the percentage of intersection with the drop target

onHoverEnd

public void onHoverEnd(java.lang.String deviceId,
                       com.google.gwt.user.client.ui.Widget widget,
                       com.google.gwt.dom.client.Element dragProxy,
                       com.google.gwt.user.client.Event event)

Description copied from interface: DropTargetHandler

Invoked when a widget leaves the region of the drop target

Specified by:

onHoverEnd in interface DropTargetHandler

Parameters:

deviceId - - the identifier of the device that triggered the drop

widget - - the widget which is dragged (this is the original widget and not the dragging proxy!)

dragProxy - - the HTML element of the proxy

event - - the event that has caused the invocation of the onEndOfDrop (e.g. a mouse up event)