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java.lang.Objectorg.eclipse.jface.util.DelegatingDragAdapter
org.eclipse.gef.dnd.DelegatingDragAdapter
A DragSourceListener that maintains and delegates to a set of TransferDragSourceListener
s. Each TransferDragSourceListener can then be implemented
as if it were the DragSource's only DragSourceListener.
When a native Drag is started, a subset of all TransferDragSourceListeners
is generated and stored in a list of active listeners. This subset is calculated
by forwarding DragSourceListener.dragStart(DragSourceEvent)
to every listener,
and inspecting changes to the doit
field. The
DragSource
's set of supported Transfer types (DragSource.setTransfer(Transfer[])
) is updated to reflect the Transfer types
corresponding to the active listener subset.
If and when DelegatingDragAdapter.dragSetData(DragSourceEvent)
is called, a single
TransferDragSourceListener
is chosen, and only it is allowed to set the
drag data. The chosen listener is the first listener in the subset of active listeners
whose Transfer supports (Transfer.isSupportedType(TransferData)
) the dataType
on the DragSourceEvent
.
Constructor Summary | |
DelegatingDragAdapter()
Deprecated. |
Method Summary | |
void |
addDragSourceListener(TransferDragSourceListener listener)
Deprecated. |
Transfer[] |
getTransferTypes()
Deprecated. call getTransfers() instead. |
void |
removeDragSourceListener(TransferDragSourceListener listener)
Deprecated. |
Methods inherited from class org.eclipse.jface.util.DelegatingDragAdapter |
addDragSourceListener, dragFinished, dragSetData, dragStart, getTransfers, isEmpty, removeDragSourceListener |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public DelegatingDragAdapter()
Method Detail |
public void addDragSourceListener(TransferDragSourceListener listener)
listener
- the new listenerpublic Transfer[] getTransferTypes()
Transfer
s from every TransferDragSourceListener.
Transfer
spublic void removeDragSourceListener(TransferDragSourceListener listener)
listener
- the listener being removed
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