Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 


Eclipse Platform
Release 3.5

org.eclipse.ui.navigator.resources
Class ResourceDropAdapterAssistant

java.lang.Object
  extended by 

org.eclipse.ui.navigator.CommonDropAdapterAssistant
      extended by 
org.eclipse.ui.navigator.resources.ResourceDropAdapterAssistant

public class ResourceDropAdapterAssistant
extends CommonDropAdapterAssistant

Clients may reference this class in the dropAssistant element of a org.eclipse.ui.navigator.navigatorContent extension point.

Clients may not extend or instantiate this class for any purpose. Clients may have no direct dependencies on the contract of this class.

Since:
3.2

Constructor Summary
ResourceDropAdapterAssistant ()
           
 
Method Summary
  IStatus handleDrop ( CommonDropAdapter aDropAdapter, DropTargetEvent aDropTargetEvent, Object aTarget)
          Carry out the DND operation.
  IStatus handlePluginTransferDrop ( IStructuredSelection aDragSelection, Object aDropTarget)
          Handle the drop operation for the target viewer.
 boolean isSupportedType ( TransferData aTransferType)
          Clients may extend the supported transfer types beyond the default LocalSelectionTransfer.getTransfer() and PluginTransfer.getInstance() transfer types.
  IStatus validateDrop ( Object target, int aDropOperation, TransferData transferType)
          Validates dropping on the given object.
  IStatus validatePluginTransferDrop ( IStructuredSelection aDragSelection, Object aDropTarget)
          Return true if the client can handle the drop onto the target viewer of the drop operation.
 
Methods inherited from class org.eclipse.ui.navigator. CommonDropAdapterAssistant
doInit, getCommonDropAdapter, getContentService, getCurrentEvent, getShell, init, setCommonDropAdapter
 
Methods inherited from class java.lang. Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ResourceDropAdapterAssistant

public ResourceDropAdapterAssistant()
Method Detail

isSupportedType

public boolean isSupportedType(
TransferData aTransferType)
Description copied from class: CommonDropAdapterAssistant
Clients may extend the supported transfer types beyond the default LocalSelectionTransfer.getTransfer() and PluginTransfer.getInstance() transfer types. When a transfer type other than one of these is encountered, the DND Service will query the visible and active descriptors that are enabled for the drop target of the current operation.

Overrides:
isSupportedType in class CommonDropAdapterAssistant
Parameters:
aTransferType - The transfer data from the drop operation
Returns:
True if the given TransferData can be understood by this assistant.

validateDrop

public 
IStatus validateDrop(
Object target,
                            int aDropOperation,
                            
TransferData transferType)
Description copied from class: CommonDropAdapterAssistant
Validates dropping on the given object. This method is called whenever some aspect of the drop operation changes.

Subclasses must implement this method to define which drops make sense. If clients return true, then they will be allowed to handle the drop in CommonDropAdapterAssistant.handleDrop(CommonDropAdapter, DropTargetEvent, Object).

Specified by:
validateDrop in class CommonDropAdapterAssistant
Parameters:
target - the object that the mouse is currently hovering over, or null if the mouse is hovering over empty space
aDropOperation - the current drag operation (copy, move, etc.)
transferType - the current transfer type
Returns:
A status indicating whether the drop is valid.

handleDrop

public 
IStatus handleDrop(
CommonDropAdapter aDropAdapter,
                          
DropTargetEvent aDropTargetEvent,
                          
Object aTarget)
Description copied from class: CommonDropAdapterAssistant
Carry out the DND operation.

Note: Contrary to the SWT DropTargetListener specification, you must make sure that the aDropTargetEvent.detail is not set to DND.DROP_MOVE unless actual work is required in the DragSourceListener.dragFinished(org.eclipse.swt.dnd.DragSourceEvent) to complete the operation (for example removing the moved file). In particular for the LocalSelectionTransfer case, DND.DROP_MOVE cannot be used as it will cause incorrect behavior in some existing drag handlers. In case of move operations where no action is required on the source side (e.g. LocalSelectionTransfer) you must set aDropTargetEvent.detail to DND.DROP_NONE to signal this to the drag source. Even though the SWT specification says this is canceling the drop, it is not really doing so, it is only preventing the DND.DROP_MOVE from being passed through to the dragFinished() method.

Specified by:
handleDrop in class CommonDropAdapterAssistant
Parameters:
aDropAdapter - The Drop Adapter contains information that has already been parsed from the drop event.
aDropTargetEvent - The drop target event.
aTarget - The object being dragged onto
Returns:
A status indicating whether the drop completed OK.

validatePluginTransferDrop

public 
IStatus validatePluginTransferDrop(
IStructuredSelection aDragSelection,
                                          
Object aDropTarget)
Description copied from class: CommonDropAdapterAssistant
Return true if the client can handle the drop onto the target viewer of the drop operation.

The default behavior of this method is to return Status.CANCEL_STATUS.

Overrides:
validatePluginTransferDrop in class CommonDropAdapterAssistant
Parameters:
aDragSelection - The selection dragged from the viewer.
aDropTarget - The target of the drop operation.
Returns:
OK if the plugin transfer can be handled by this assistant.

handlePluginTransferDrop

public 
IStatus handlePluginTransferDrop(
IStructuredSelection aDragSelection,
                                        
Object aDropTarget)
Description copied from class: CommonDropAdapterAssistant
Handle the drop operation for the target viewer.

The default behavior of this method is to return Status.CANCEL_STATUS.

Overrides:
handlePluginTransferDrop in class CommonDropAdapterAssistant
Parameters:
aDragSelection - The selection dragged from the viewer.
aDropTarget - The target of the drop operation.
Returns:
OK if the drop operation succeeded.

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.


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