Examples of org.eclipse.swt.dnd.DropTargetListener

org.eclipse.swt.dnd.DropTargetListener
The DropTargetListener class provides event notification to the application for DropTarget events.
As the user moves the cursor into, over and out of a Control that has been designated as a DropTarget, events indicate what operation can be performed and what data can be transferred if a drop where to occur at that point. The application can respond to these events and change the type of data that will be dropped by modifying event.currentDataType, or change the operation that will be performed by modifying the event.detail field or stop any drop from happening on the current target by setting the event.detail field to DND_DROP_NONE.

When the user causes a drop to happen by releasing the mouse over a valid drop target, the application has one last chance to change the data type of the drop through the DropAccept event. If the drop is still allowed, the DropAccept event is immediately followed by the Drop event. In the Drop event, the application can still change the operation that is performed but the data type is fixed.
@see DropTargetEvent

      }
    };
  }


  private DropTargetListener createDropTargetListener() {
    return new DropTargetListener() {
      public void dragEnter(DropTargetEvent event) {
      }


      public void dragLeave(DropTargetEvent event) {
      }

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    viewer.setInput(null);
    document.addChangeListener(contentProvider);


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


    viewer.addDropSupport(DND.DROP_COPY, typesDropSupport, new DropTargetListener() {


      public void dragEnter(DropTargetEvent event) {
        // only the FeatureStructureTransfer is supported
        // set currentTransferType to FeatureStructureTransfer, if possible
        for (TransferData transferData : event.dataTypes) {

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    int editorSiteOps = DND.DROP_DEFAULT | DND.DROP_COPY | DND.DROP_LINK;


    WorkbenchWindow ww = (WorkbenchWindow) PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        WorkbenchWindowConfigurer winConfigurer = ww.getWindowConfigurer();
        Transfer[] editorSiteTransfers = winConfigurer.getTransfers();
        DropTargetListener editorSiteListener = winConfigurer.getDropTargetListener();
        
        // Create a new 'merged' drop Listener using combination of the desired
        // transfers and the ones used by the EditorArea
    MergedDropTarget newTarget = new MergedDropTarget(control, ops, transfers, listener,
        editorSiteOps, editorSiteTransfers, editorSiteListener);

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      }
      realDropTarget.setTransfer(allTransfers);
      
      // Create a listener that will delegate to the appropriate listener
      // NOTE: the -editor- wins (i.e. it can over-ride WB behaviour if it wants
      realDropTarget.addDropListener(new DropTargetListener() {
        public void dragEnter(DropTargetEvent event) {
          getAppropriateListener(event).dragEnter(event);
        }
        public void dragLeave(DropTargetEvent event) {
          getAppropriateListener(event).dragLeave(event);

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        }
      }
    });


    // Install drag target
    DropTargetListener dropTargetListener= new DropTargetAdapter() {


      private Point fSelection;


      public void dragEnter(DropTargetEvent event) {
        fTextDragAndDropToken= null;

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  private void createDropTarget() {
    if (dropTarget != null)
      dropTarget.dispose();
    dropTarget = new DropTarget(dropControl, dropOperation);
    dropTarget.setTransfer(dropTypes);
    dropTarget.addDropListener(new DropTargetListener() {
      public void dragEnter(DropTargetEvent event) {
        dropConsole.append(">>dragEnter\n");
        printEvent(event);
        if (event.detail == DND.DROP_DEFAULT)
          event.detail = dropDefaultOperation;

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        int operations = DND.DROP_COPY | DND.DROP_DEFAULT;
        DropTarget target = new DropTarget(field, operations);
        final TextTransfer textTransfer = TextTransfer.getInstance();
        Transfer[] types = new Transfer[] { textTransfer };
        target.setTransfer(types);
        target.addDropListener(new DropTargetListener() {
            public void dragEnter(DropTargetEvent event) {
                if (event.detail == DND.DROP_DEFAULT) {
                    if ((event.operations & DND.DROP_COPY) != 0) {
                        event.detail = DND.DROP_COPY;
                    } else {

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        // Receive data in Text or File format
        final FileTransfer fileTransfer = FileTransfer.getInstance();
        Transfer[] types = new Transfer[] { fileTransfer };
        target.setTransfer(types);


        target.addDropListener(new DropTargetListener() {
            public void dragEnter(DropTargetEvent event) {
                if (event.detail == DND.DROP_DEFAULT) {
                    if ((event.operations & DND.DROP_COPY) != 0) {
                        event.detail = DND.DROP_COPY;
                    } else {

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    viewer.setInput(null);
    document.addChangeListener(contentProvider);


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


    viewer.addDropSupport(DND.DROP_COPY, typesDropSupport, new DropTargetListener() {


      public void dragEnter(DropTargetEvent event) {
        // only the FeatureStructureTransfer is supported
        // set currentTransferType to FeatureStructureTransfer, if possible
        for (TransferData transferData : event.dataTypes) {

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        public void addDropSupport(int operations, Transfer[] transferTypes, final DropTargetListener listener)
        {
            DropTarget dropTarget = new DropTarget(item, operations);
            dropTarget.setTransfer(transferTypes);
            dropTarget.addDropListener(new DropTargetListener()
            {
                @Override
                public void dropAccept(DropTargetEvent event)
                {
                    listener.dropAccept(event);

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