Class DelegatingDragAdapter
- All Implemented Interfaces:
EventListener,DragSourceListener,SWTEventListener
TransferDragSourceListeners. 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.
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidDeprecated.Transfer[]Deprecated.call getTransfers() instead.voidDeprecated.Methods inherited from class org.eclipse.jface.util.DelegatingDragAdapter
addDragSourceListener, dragFinished, dragSetData, dragStart, getTransfers, isEmpty, removeDragSourceListener
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Constructor Details
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DelegatingDragAdapter
public DelegatingDragAdapter()
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Method Details
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addDragSourceListener
Deprecated.Adds the given TransferDragSourceListener. The set of Transfer types is updated to reflect the change.- Parameters:
listener- the new listener
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getTransferTypes
Deprecated.call getTransfers() instead.Combines theTransfers from every TransferDragSourceListener.- Returns:
- the combined
Transfers
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removeDragSourceListener
Deprecated.Adds the given TransferDragSourceListener. The set of Transfer types is updated to reflect the change.- Parameters:
listener- the listener being removed
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