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

    // 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 = PlaylistOverview.ID;        
      }
      public void dragStart(DragSourceEvent event) {          
        event.data = PlaylistOverview.ID;

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    DragSource source = new DragSource(viewer.getTree(), DND.DROP_COPY);


    source.setTransfer(new Transfer[] { FeatureStructureTransfer.getInstance() });


    source.addDragListener(new DragSourceListener() {
      TreeItem dragSourceItem = null;


      public void dragStart(DragSourceEvent event) {


        event.doit = false;

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    DragSource source = new DragSource(mTableViewer.getTree(), DND.DROP_COPY);


    source.setTransfer(new Transfer[] { FeatureStructureTransfer.getInstance() });


    source.addDragListener(new DragSourceListener() {
      TreeItem dragSourceItem = null;


      public void dragStart(DragSourceEvent event) {
        TreeItem[] selection = mTableViewer.getTree().getSelection();

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


    dragSource.setTransfer(types);


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


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


    getSite().setSelectionProvider(mFeatureStructureSelectionProvider);

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    setCellModifier(new XMLCMCellModifier());
    createContextMenu();


    DragSource dragSource = new DragSource(getControl(), DND.DROP_COPY | DND.DROP_MOVE);
    dragSource.addDragListener(createDragSourceListener());
    dragSource.setTransfer(new Transfer[] {LocalSelectionTransfer.getTransfer()});
    DropTarget dropTarget = new DropTarget(getControl(), DND.DROP_COPY | DND.DROP_MOVE);
    dropTarget.addDropListener(createDropTargetListener());
    dropTarget.setTransfer(new Transfer[] {LocalSelectionTransfer.getTransfer()});

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    DragSource source = new DragSource(viewer.getTree(), DND.DROP_COPY);


    source.setTransfer(new Transfer[] { FeatureStructureTransfer.getInstance() });


    source.addDragListener(new DragSourceListener() {
      TreeItem dragSourceItem = null;


      public void dragStart(DragSourceEvent event) {


        event.doit = false;

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


    dragSource.setTransfer(types);


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


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


    getSite().setSelectionProvider(mFeatureStructureSelectionProvider);

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   * Initialize the drag and drop functionality.
   */
  private void init() {
        DragSource source = new DragSource(tableViewer.getControl(), DND.DROP_COPY | DND.DROP_MOVE);
        source.setTransfer(new Transfer[]{ new CsvRowTransfer()});
        source.addDragListener(new DragSourceListener() {
      
      @Override
      public void dragStart(DragSourceEvent event) {
        event.doit = ((IStructuredSelection)tableViewer.getSelection()).toArray().length == 1;
      }

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  private void createDragSource() {
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    DragSource dragSource = new DragSource(tree, DND.DROP_COPY
        | DND.DROP_MOVE);
    dragSource.setTransfer(types);
    dragSource.addDragListener(new DragSourceAdapter() {


      @Override
      public void dragSetData(DragSourceEvent event) {
        List<MetaArtefactOperation> operations = new ArrayList<MetaArtefactOperation>();
        for (TreeItem item : tree.getSelection()) {

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