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

     * Creates DND source for the list
     */
    private void createDNDSource() {
      DragSource ds = new DragSource(list, DND.DROP_COPY);
      ds.setTransfer(new Transfer[] { TextTransfer.getInstance() });
      ds.addDragListener(new DragSourceListener() {
        public void dragFinished(DragSourceEvent event) {


        }


        public void dragSetData(DragSourceEvent event) {

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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;

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            // This example will allow the text to be copied or moved to the drop target
            int operations = DND.DROP_COPY;


            DragSource source = new DragSource(table, operations);
            source.setTransfer(types);
            source.addDragListener(new DragSourceListener() {
                public void dragStart(DragSourceEvent event) {
                    logger.debug("drag start: " + event);
                    // // Only start the drag if there is actually text in the
                    // // label - this text will be what is dropped on the target.
                    // if (label.getText().length() == 0) {

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        int operations = DND.DROP_COPY | DND.DROP_MOVE;


        DragSource source = new DragSource(formatComposite, operations);
        DropTarget target = new DropTarget(formatComposite, operations);


        source.addDragListener(
            new LayoutDragSourceListener(transfer[0], actionDetails));
        source.setTransfer(transfer);
        target.addDropListener(new LayoutDropTargetListener(
                actionDetails, context.getODOMSelectionManager(),
            ((LayoutODOMEditorContext) context).getLayoutEditorContext()) {

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            });
        }


        leftDragSource.setTransfer(types);


        leftDragSource.addDragListener(new DragSourceListener() {
            public void dragStart(DragSourceEvent event) {
                // Only start the drag if there is something selected
                event.doit = leftListController.list.getSelectionCount() > 0;
            }

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                    new DragSource(rightListController.list, DND.DROP_MOVE);


            // Provide data in Text format
            rightDragSource.setTransfer(types);


            rightDragSource.addDragListener(new DragSourceListener() {
                public void dragStart(DragSourceEvent event) {
                    // Only start the drag if there is a selection
                    event.doit =
                            rightListController.list.getSelectionCount() > 0;
                }

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    // Drag source
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    DragSource source = new DragSource(viewer.getTable(), DND.DROP_MOVE);
    source.setTransfer(types);    
        
    source.addDragListener(new DragSourceAdapter() {      
      public void dragSetData(DragSourceEvent event) {        
        event.data = PodcastListView.ID;        
      }
      public void dragStart(DragSourceEvent event) {          
        event.data = PodcastListView.ID;

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    // Drag source
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    DragSource source = new DragSource(viewer.getTable(), DND.DROP_MOVE);
    source.setTransfer(types);    
        
    source.addDragListener(new DragSourceAdapter() {      
      public void dragSetData(DragSourceEvent event) {        
        event.data = _id;        
      }
      public void dragStart(DragSourceEvent event) {          
        event.data = _id;

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    // Drag source
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    DragSource source = new DragSource(treeViewer.getTree(), DND.DROP_COPY);
    source.setTransfer(types);    
        
    source.addDragListener(new DragSourceAdapter() {      
      public void dragSetData(DragSourceEvent event) {        
        event.data = ID;        
      }
      @SuppressWarnings("unchecked")
      public void dragStart(DragSourceEvent event) {

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    // Drag source
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    DragSource source = new DragSource(treeViewer.getTree(), DND.DROP_COPY);
    source.setTransfer(types);    
        
    source.addDragListener(new DragSourceAdapter() {      
      public void dragSetData(DragSourceEvent event) {        
        event.data = ID;        
      }
      @SuppressWarnings("unchecked")
      public void dragStart(DragSourceEvent event) {

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