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org.eclipse.ui.navigator.resources
Class ResourceDropAdapterAssistant
java.lang.Object
org.eclipse.ui.navigator.CommonDropAdapterAssistant
org.eclipse.ui.navigator.resources.ResourceDropAdapterAssistant
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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.
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Since:
- 3.2
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Methods inherited from class java.lang.
Object
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clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
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ResourceDropAdapterAssistant
public ResourceDropAdapterAssistant()
isSupportedType
public boolean isSupportedType(
TransferData aTransferType)
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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.
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Overrides:
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isSupportedType
in class
CommonDropAdapterAssistant
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Parameters:
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aTransferType - The transfer data from the drop operation
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Returns:
- True if the given TransferData can be understood by this
assistant.
validateDrop
public
IStatus validateDrop(
Object target,
int aDropOperation,
TransferData transferType)
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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).
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Specified by:
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validateDrop
in class
CommonDropAdapterAssistant
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Parameters:
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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
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Returns:
- A status indicating whether the drop is valid.
handleDrop
public
IStatus handleDrop(
CommonDropAdapter aDropAdapter,
DropTargetEvent aDropTargetEvent,
Object aTarget)
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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.
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Specified by:
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handleDrop
in class
CommonDropAdapterAssistant
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Parameters:
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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
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Returns:
- A status indicating whether the drop completed OK.
validatePluginTransferDrop
public
IStatus validatePluginTransferDrop(
IStructuredSelection aDragSelection,
Object aDropTarget)
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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.
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Overrides:
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validatePluginTransferDrop
in class
CommonDropAdapterAssistant
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Parameters:
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aDragSelection - The selection dragged from the viewer. -
aDropTarget - The target of the drop operation.
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Returns:
- OK if the plugin transfer can be handled by this assistant.
handlePluginTransferDrop
public
IStatus handlePluginTransferDrop(
IStructuredSelection aDragSelection,
Object aDropTarget)
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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.
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Overrides:
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handlePluginTransferDrop
in class
CommonDropAdapterAssistant
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Parameters:
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aDragSelection - The selection dragged from the viewer. -
aDropTarget - The target of the drop operation.
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Returns:
- OK if the drop operation succeeded.
Guidelines for using Eclipse APIs.
Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.
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