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Eclipse GEF
3.3

org.eclipse.gef.dnd
Class TemplateTransferDropTargetListener

java.lang.Object
  extended by

org.eclipse.gef.dnd.AbstractTransferDropTargetListener
      extended by
org.eclipse.gef.dnd.TemplateTransferDropTargetListener
All Implemented Interfaces:
TransferDropTargetListener

public class TemplateTransferDropTargetListener
extends AbstractTransferDropTargetListener

Performs a native Drop using the TemplateTransfer. The Drop is performed by using a CreateRequest to obtain a Command from the targeted EditPart.

This class is abstract. Subclasses are responsible for providing the appropriate Factory object based on the template that is being dragged.

Since:
2.1

Constructor Summary
TemplateTransferDropTargetListener ( EditPartViewer viewer)
          Constructs a listener on the specified viewer.
 
Method Summary
protected   Request createTargetRequest ()
          Creates and returns the Request that will be sent to the targeted EditPart.
protected   CreateRequest getCreateRequest ()
          A helper method that casts the target Request to a CreateRequest.
protected   CreationFactory getFactory (java.lang.Object template)
          Returns the appropriate Factory object to be used for the specified template.
protected  void handleDragOperationChanged ()
          The purpose of a template is to be copied.
protected  void handleDragOver ()
          The purpose of a template is to be copied.
protected  void handleDrop ()
          Overridden to select the created object.
protected  void updateTargetRequest ()
          Assumes that the target request is a CreateRequest.
 
Methods inherited from class org.eclipse.gef.dnd. AbstractTransferDropTargetListener
dragEnter, dragLeave, dragOperationChanged, dragOver, drop, dropAccept, eraseTargetFeedback, getCommand, getCurrentEvent, getDropLocation, getExclusionSet, getTargetEditPart, getTargetRequest, getTransfer, getViewer, handleEnteredEditPart, handleExitingEditPart, handleHover, handleHoverStop, isEnabled, isEnablementDeterminedByCommand, setAutoexposeHelper, setCurrentEvent, setEnablementDeterminedByCommand, setTargetEditPart, setTransfer, setViewer, showTargetFeedback, unload, updateAutoexposeHelper, updateTargetEditPart
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TemplateTransferDropTargetListener

public TemplateTransferDropTargetListener(
EditPartViewer viewer)
Constructs a listener on the specified viewer.

Parameters:
viewer - the EditPartViewer
Method Detail

createTargetRequest

protected 
Request createTargetRequest()
Description copied from class: AbstractTransferDropTargetListener
Creates and returns the Request that will be sent to the targeted EditPart. Subclasses can override to create specialized requests.

Overrides:
createTargetRequest in class AbstractTransferDropTargetListener
Returns:
the Request to be used with the target EditPart
See Also:
AbstractTransferDropTargetListener.createTargetRequest()

getCreateRequest

protected final 
CreateRequest getCreateRequest()
A helper method that casts the target Request to a CreateRequest.

Returns:
CreateRequest

getFactory

protected 
CreationFactory getFactory(java.lang.Object template)
Returns the appropriate Factory object to be used for the specified template. This Factory is used on the CreateRequest that is sent to the target EditPart.

Parameters:
template - the template Object
Returns:
a Factory

handleDragOperationChanged

protected void handleDragOperationChanged()
The purpose of a template is to be copied. Therefore, the drop operation can't be anything but DND.DROP_COPY.

Overrides:
handleDragOperationChanged in class AbstractTransferDropTargetListener
See Also:
AbstractTransferDropTargetListener.handleDragOperationChanged()

handleDragOver

protected void handleDragOver()
The purpose of a template is to be copied. Therefore, the Drop operation is set to DND.DROP_COPY by default.

Overrides:
handleDragOver in class AbstractTransferDropTargetListener
See Also:
AbstractTransferDropTargetListener.handleDragOver()

handleDrop

protected void handleDrop()
Overridden to select the created object.

Overrides:
handleDrop in class AbstractTransferDropTargetListener
See Also:
AbstractTransferDropTargetListener.handleDrop()

updateTargetRequest

protected void updateTargetRequest()
Assumes that the target request is a CreateRequest.

Specified by:
updateTargetRequest in class AbstractTransferDropTargetListener

Eclipse GEF
3.3

Copyright (c) IBM Corp. and others 2000, 2007. All Rights Reserved.

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