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Runtime

org.eclipse.gmf.runtime.common.ui.services.dnd.drop
Class TransferDropTargetAdapter

java.lang.Object
  extended by 
org.eclipse.gmf.runtime.common.ui.services.dnd.drop.TransferDropTargetAdapter
All Implemented Interfaces:
java.util.EventListener, ITransferDropTargetListener, DropTargetListener, org.eclipse.swt.internal.SWTEventListener
Direct Known Subclasses:
SelectionDropAdapter

public class TransferDropTargetAdapter
extends java.lang.Object
implements ITransferDropTargetListener

Parent of all the transfer drop target adapters. Every transfer type drop target adapter should override the methods in the DropTargetListener interface.


Constructor Summary
TransferDropTargetAdapter ( ITransferAgent aTransferAgent)
          Constructor for TransferDropTargetAdapter.
 
Method Summary
 boolean canSupport ( DropTargetEvent event)
          Returns whether the drop operation for the current drop event is supported by this listener.
protected  boolean canSupportTransferData ( DropTargetEvent event)
          Checks if the transfer agent can support one of the transfer datas passed into the event.
 void dragEnter ( DropTargetEvent event)
           
 void dragLeave ( DropTargetEvent event)
           
 void dragOperationChanged ( DropTargetEvent event)
           
 void dragOver ( DropTargetEvent event)
           
 void drop ( DropTargetEvent event)
           
 void dropAccept ( DropTargetEvent event)
           
protected   IDropTargetContext getContext ()
          Returns the context.
protected   IDropTargetListener getListener ()
          Returns the listener.
  ITransferAgent getTransferAgent ()
          Returns the transfer agent.
 void init ( IDropTargetContext initialContext)
          Initializes this transfer drop target listener with the drop target context that provides the target and location information during the drag/drop operation.
protected  boolean isSupportingListenerAvailable ()
          Check if a supporting listener is available.It also updates the current listener cache.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TransferDropTargetAdapter

public TransferDropTargetAdapter(
ITransferAgent aTransferAgent)
Constructor for TransferDropTargetAdapter.

Parameters:
aTransferAgent - The transfer agent
Method Detail

dragEnter

public void dragEnter(
DropTargetEvent event)
Specified by:
dragEnter in interface DropTargetListener

dragLeave

public void dragLeave(
DropTargetEvent event)
Specified by:
dragLeave in interface DropTargetListener

dragOperationChanged

public void dragOperationChanged(
DropTargetEvent event)
Specified by:
dragOperationChanged in interface DropTargetListener

dragOver

public void dragOver(
DropTargetEvent event)
Specified by:
dragOver in interface DropTargetListener

drop

public final void drop(
DropTargetEvent event)
Specified by:
drop in interface DropTargetListener

dropAccept

public void dropAccept(
DropTargetEvent event)
Specified by:
dropAccept in interface DropTargetListener

getListener

protected final 
IDropTargetListener getListener()
Returns the listener.

Returns:
IDropTargetListener

getContext

protected final 
IDropTargetContext getContext()
Returns the context.

Returns:
IDropTargetContext

init

public final void init(
IDropTargetContext initialContext)
Description copied from interface: ITransferDropTargetListener
Initializes this transfer drop target listener with the drop target context that provides the target and location information during the drag/drop operation.

Specified by:
init in interface ITransferDropTargetListener
Parameters:
initialContext - the drop target context

getTransferAgent

public final 
ITransferAgent getTransferAgent()
Returns the transfer agent.

Specified by:
getTransferAgent in interface ITransferDropTargetListener
Returns:
ITransferAgent

canSupport

public boolean canSupport(
DropTargetEvent event)
Description copied from interface: ITransferDropTargetListener
Returns whether the drop operation for the current drop event is supported by this listener. This listener will have access to the IDropActionContext and the current drop target listener when this method is invoked.

Specified by:
canSupport in interface ITransferDropTargetListener
Parameters:
event - The drop target event
Returns:
true if can support, false otherwise

isSupportingListenerAvailable

protected final boolean isSupportingListenerAvailable()
Check if a supporting listener is available.It also updates the current listener cache.

Returns:
boolean true or false

canSupportTransferData

protected final boolean canSupportTransferData(
DropTargetEvent event)
Checks if the transfer agent can support one of the transfer datas passed into the event. It also updates the internal current event cache and sets the current data type on the current event.

Parameters:
event - the drop target event
Returns:
boolean true or false

Runtime

Guidelines for using Eclipse APIs.

Copyright (c) IBM Corp., Borland Software Corp., and others 2005,2006. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire