Examples of org.eclipse.swt.dnd.DragSource.addDragListener()

org.eclipse.swt.dnd.DragSource.addDragListener()
Adds the listener to the collection of listeners who will be notified when a drag and drop operation is in progress, by sending it one of the messages defined in the DragSourceListener interface.
- dragStart is called when the user has begun the actions required to drag the widget. This event gives the application the chance to decide if a drag should be started.
- dragSetData is called when the data is required from the drag source.
- dragFinished is called when the drop has successfully completed (mouse up over a valid target) or has been terminated (such as hitting the ESC key). Perform cleanup such as removing data from the source side on a successful move operation.
@param listener the listener which should be notified @exception IllegalArgumentException
- ERROR_NULL_ARGUMENT - if the listener is null
@exception SWTException
- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
@see DragSourceListener @see #getDragListeners @see #removeDragListener @see DragSourceEvent


  private DragSource addDragSupport(Control control, int operations,
      Transfer[] transferTypes, DragSourceListener listener) {
    DragSource source = new DragSource(control, operations);
    source.setTransfer(transferTypes);
    source.addDragListener(listener);
    source.setDragSourceEffect(new DragSourceEffect(control) {
      public void dragStart(DragSourceEvent event) {
        event.image = createDragEffectImage();
      }
    });

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    // Install drag source
    final ISelectionProvider selectionProvider= viewer.getSelectionProvider();
    final DragSource source= new DragSource(st, DND.DROP_COPY | DND.DROP_MOVE);
    source.setTransfer(new Transfer[] {TextTransfer.getInstance()});
    source.addDragListener(new DragSourceAdapter() {
      String fSelectedText;
      Point fSelection;
      public void dragStart(DragSourceEvent event) {
        fTextDragAndDropToken= null;
        try {

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                // ensure to stop any current active internal drag mode
                NatTable.this.modeSupport.switchMode(Mode.NORMAL_MODE);
            }
        };


        dragSource.addDragListener(wrapper);
    }


    /**
     * Adds support for dropping items into this control via a user
     * drag-and-drop operation.

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                final DragSource dragSource = new DragSource( this.table, DND.DROP_COPY | DND.DROP_MOVE );
                dragSource.setTransfer( transfers );


                final List<Element> dragElements = new ArrayList<Element>();
                
                dragSource.addDragListener
                (
                    new DragSourceListener()
                    {
                        public void dragStart( final DragSourceEvent event )
                        {

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   * @return the DragSource for the table
   */
  private DragSource createTableDragSource(final Table table) {
    DragSource dragSource = new DragSource(table, DND.DROP_MOVE | DND.DROP_COPY);
    dragSource.setTransfer(new Transfer[] { FileTransfer.getInstance() });
    dragSource.addDragListener(new DragSourceListener() {
      TableItem[]  dndSelection  = null;
      String[]  sourceNames    = null;


      public void dragFinished(DragSourceEvent event) {
        dragSourceHandleDragFinished(event, sourceNames);

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   * @return the DragSource for the tree
   */
  private DragSource createTreeDragSource(final Tree tree) {
    DragSource dragSource = new DragSource(tree, DND.DROP_MOVE | DND.DROP_COPY);
    dragSource.setTransfer(new Transfer[] { FileTransfer.getInstance() });
    dragSource.addDragListener(new DragSourceListener() {
      TreeItem[]  dndSelection  = null;
      String[]  sourceNames    = null;


      public void dragFinished(DragSourceEvent event) {
        dragSourceHandleDragFinished(event, sourceNames);

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            handleLineStartAction = new HandleLineStartAction();
        }


        private void initDragDrop() {
            DragSource dragSource = new DragSource(this, DND.DROP_COPY | DND.DROP_MOVE);
            dragSource.addDragListener(new DragSourceAdapter());
            dragSource.setTransfer(new Transfer[] { org.eclipse.swt.dnd.TextTransfer.getInstance() });


            DropTarget dropTarget = new DropTarget(this, DND.DROP_COPY | DND.DROP_MOVE);
            dropTarget.setTransfer(new Transfer[] { LocalSelectionTransfer.getTransfer(),
                    org.eclipse.swt.dnd.TextTransfer.getInstance() });

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  private DragSource addDragSupport(Control control, int operations,
      Transfer[] transferTypes, DragSourceListener listener) {
    DragSource source = new DragSource(control, operations);
    source.setTransfer(transferTypes);
    source.addDragListener(listener);
    source.setDragSourceEffect(new DragSourceEffect(control) {
      public void dragStart(DragSourceEvent event) {
        event.image = createDragEffectImage();
      }
    });

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        final DragSource dragSource = new DragSource( tree, DND.DROP_COPY | DND.DROP_MOVE );
        dragSource.setTransfer( transfers );


        final List<Element> dragElements = new ArrayList<Element>();
        
        dragSource.addDragListener
        (
            new DragSourceListener()
            {
                public void dragStart( final DragSourceEvent event )
                {

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    Transfer[] types = new Transfer[] { FeatureStructureTransfer.getInstance() };


    dragSource.setTransfer(types);


    dragSource.addDragListener(new FeatureStructureDragListener(getSourceViewer().getTextWidget()));


    getSite().getPage().addSelectionListener(this);


    getSourceViewer().getTextWidget().setEditable(false);
    getSourceViewer().setEditable(false);

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