org.eclipse.gef.dnd
Class TemplateTransferDropTargetListener

java.lang.Object
  org.eclipse.gef.dnd.AbstractTransferDropTargetListener
      org.eclipse.gef.dnd.TemplateTransferDropTargetListener

All Implemented Interfaces:

EventListener, TransferDropTargetListener, DropTargetListener, org.eclipse.swt.internal.SWTEventListener

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(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(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