Examples of DropTargetDragEvent

ae.java.awt.dnd.DropTargetDragEvent
The DropTargetDragEvent is delivered to a DropTargetListener via its dragEnter() and dragOver() methods.
The DropTargetDragEvent reports the source drop actions and the user drop action that reflect the current state of the drag operation.
Source drop actions is a bitwise mask of DnDConstants that represents the set of drop actions supported by the drag source for this drag operation.
User drop action depends on the drop actions supported by the drag source and the drop action selected by the user. The user can select a drop action by pressing modifier keys during the drag operation:
```
 Ctrl + Shift -> ACTION_LINK Ctrl         -> ACTION_COPY Shift        -> ACTION_MOVE 
```
If the user selects a drop action, the user drop action is one of DnDConstants that represents the selected drop action if this drop action is supported by the drag source or DnDConstants.ACTION_NONE if this drop action is not supported by the drag source.
If the user doesn't select a drop action, the set of DnDConstants that represents the set of drop actions supported by the drag source is searched for DnDConstants.ACTION_MOVE, then for DnDConstants.ACTION_COPY, then for DnDConstants.ACTION_LINK and the user drop action is the first constant found. If no constant is found the user drop action is DnDConstants.ACTION_NONE. @since 1.2
java.awt.dnd.DropTargetDragEvent
The DropTargetDragEvent is delivered to a DropTargetListener via its dragEnter() and dragOver() methods.
The DropTargetDragEvent reports the source drop actions and the user drop action that reflect the current state of the drag operation.
Source drop actions is a bitwise mask of DnDConstants that represents the set of drop actions supported by the drag source for this drag operation.
User drop action depends on the drop actions supported by the drag source and the drop action selected by the user. The user can select a drop action by pressing modifier keys during the drag operation:
```
 Ctrl + Shift -> ACTION_LINK Ctrl         -> ACTION_COPY Shift        -> ACTION_MOVE 
```
If the user selects a drop action, the user drop action is one of DnDConstants that represents the selected drop action if this drop action is supported by the drag source or DnDConstants.ACTION_NONE if this drop action is not supported by the drag source.
If the user doesn't select a drop action, the set of DnDConstants that represents the set of drop actions supported by the drag source is searched for DnDConstants.ACTION_MOVE, then for DnDConstants.ACTION_COPY, then for DnDConstants.ACTION_LINK and the user drop action is the first constant found. If no constant is found the user drop action is DnDConstants.ACTION_NONE. @since 1.2

Examples of ae.java.awt.dnd.DropTargetDragEvent

            currentDTC.addNotify(this);


            currentA   = dt.getDefaultActions();


            try {
                ((DropTargetListener)dt).dragEnter(new DropTargetDragEvent(currentDTC,
                                                                           hots,
                                                                           currentDA,
                                                                           currentSA));
            } catch (Exception e) {
                e.printStackTrace();

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Examples of ae.java.awt.dnd.DropTargetDragEvent

            }


            currentA = currentDT.getDefaultActions();


            try {
                DropTargetDragEvent dtde = new DropTargetDragEvent(dtc,
                                                                   hots,
                                                                   currentDA,
                                                                   currentSA);
                DropTargetListener dtl = (DropTargetListener)dt;
                if (operationChanged) {

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Examples of java.awt.dnd.DropTargetDragEvent

    /**
     * Called from native method WinDropTarget::DragOver()
     * @return bit mask of DROPEFFECT_* constants according to dropAction
     */
    public int dragOver(int x, int y, int userAction, int sourceActions) {
        DropTargetDragEvent e = new DropTargetDragEvent(
                context, new Point(x, y), 
                WinDragSource.getDndActions(userAction), 
                WinDragSource.getDndActions(sourceActions));
        
        return dispatchEvent(e, DRAG_OVER);

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Examples of java.awt.dnd.DropTargetDragEvent

    public void run() {
        synchronized (dropMonitor) {
            switch (dragState) {
            case DRAG_ENTER:
            {
                DropTargetDragEvent e = (DropTargetDragEvent)currentEvent;
                context.getDropTarget().dragEnter(e);
                dropAction = e.getDropAction();
                break;
            }
            case DRAG_OVER:
            {
                DropTargetDragEvent e = (DropTargetDragEvent)currentEvent;
                context.getDropTarget().dragOver(e);
                dropAction = e.getDropAction();
                break;
            }
            case DRAG_DROP:
            {
                DropTargetDropEvent e = (DropTargetDropEvent)currentEvent;
                context.getDropTarget().drop(e);
                dropAction = e.getDropAction();
                break;
            }
            case DRAG_LEAVE:
            {
                context.getDropTarget().dragExit(currentEvent);

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Examples of java.awt.dnd.DropTargetDragEvent

  void testNullLoc(TestHarness h)
  {
    caught = false;
    try
      {
        new DropTargetDragEvent(dtc, null, DnDConstants.ACTION_COPY,
                                DnDConstants.ACTION_COPY);
      }
    catch (NullPointerException npe)
      {
        caught = true;

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Examples of java.awt.dnd.DropTargetDragEvent

  void testDropAction(TestHarness h)
  {
    caught = false;
    try
      {
        new DropTargetDragEvent(dtc, loc, 4, DnDConstants.ACTION_COPY);
      }
    catch (IllegalArgumentException iae)
      {
        caught = true;
      }

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Examples of java.awt.dnd.DropTargetDragEvent

  void testSrcAction(TestHarness h)
  {
    caught = false;
    try
      {
        new DropTargetDragEvent(dtc, loc, DnDConstants.ACTION_COPY, 4);
      }
    catch (IllegalArgumentException iae)
      {
        caught = true;
      }

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Examples of java.awt.dnd.DropTargetDragEvent

  }
  
  void testNormal(TestHarness h)
  {
    caught = false;
    DropTargetDragEvent dtde = null;
    try
      {
        dtde = new DropTargetDragEvent(dtc, loc, DnDConstants.ACTION_COPY,
                                DnDConstants.ACTION_COPY);
      }
    catch (Exception e)
      {
        caught = true;
      }
    
    h.check(!caught);    
    h.check(dtde != null && dtde.getDropAction() == DnDConstants.ACTION_COPY);
    h.check(dtde != null && dtde.getSourceActions() == DnDConstants.ACTION_COPY);
    h.check(dtde != null && dtde.getLocation().equals(loc));
  }

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Examples of java.awt.dnd.DropTargetDragEvent

        int currentAction = DragHandler.NONE;
        int sourceActions = DragHandler.NONE;
        Point location = null;
        DataFlavor[] flavors = new DataFlavor[0];
        if (e instanceof DropTargetDragEvent) {
            DropTargetDragEvent ev = (DropTargetDragEvent)e;
            currentAction = ev.getDropAction();
            sourceActions = ev.getSourceActions();
            flavors = ev.getCurrentDataFlavors();
            location = ev.getLocation();
        }
        else if (e instanceof DropTargetDropEvent) {
            DropTargetDropEvent ev = (DropTargetDropEvent)e;
            currentAction = ev.getDropAction();
            sourceActions = ev.getSourceActions();
            flavors = ev.getCurrentDataFlavors();
            location = ev.getLocation();
        }
        if (isSupported(flavors)) {
            int availableActions = getDropActionsForFlavors(flavors);
            currentAction = getDropAction(e, currentAction, sourceActions, availableActions);
            if (currentAction != DragHandler.NONE) {

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Examples of java.awt.dnd.DropTargetDragEvent

        if (false) {
            String msg = "drop: " + type;
            if (e instanceof DropTargetDragEvent) {
                DropTargetContext dtc = e.getDropTargetContext();
                DropTarget dt = dtc.getDropTarget();
                DropTargetDragEvent ev = (DropTargetDragEvent)e;
                msg += ": src=" + DragHandler.actionString(ev.getSourceActions())
                    + " tgt=" + DragHandler.actionString(dt.getDefaultActions())
                    + " act=" + DragHandler.actionString(ev.getDropAction());
            }
            else if (e instanceof DropTargetDropEvent) {
                DropTargetContext dtc = e.getDropTargetContext();
                DropTarget dt = dtc.getDropTarget();
                DropTargetDropEvent ev = (DropTargetDropEvent)e;
                msg += ": src=" + DragHandler.actionString(ev.getSourceActions())
                + " tgt=" + DragHandler.actionString(dt.getDefaultActions())
                + " act=" + DragHandler.actionString(ev.getDropAction());
            }
            if (!msg.equals(lastAction)) {
                System.out.println(lastAction = msg);
            }
        }

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