Examples of DragSourceContext

ae.java.awt.dnd.DragSourceContext
The DragSourceContext class is responsible for managing the initiator side of the Drag and Drop protocol. In particular, it is responsible for managing drag event notifications to the {@linkplain DragSourceListener DragSourceListeners}and {@linkplain DragSourceMotionListener DragSourceMotionListeners}, and providing the {@link Transferable} representing the source data for the drag operation.
Note that the DragSourceContext itself implements the DragSourceListener and DragSourceMotionListener interfaces. This is to allow the platform peer (the {@link DragSourceContextPeer} instance)created by the {@link DragSource} to notifythe DragSourceContext of state changes in the ongoing operation. This allows the DragSourceContext object to interpose itself between the platform and the listeners provided by the initiator of the drag operation.
By default, {@code DragSourceContext} sets the cursor as appropriatefor the current state of the drag and drop operation. For example, if the user has chosen {@linkplain DnDConstants#ACTION_MOVE the move action}, and the pointer is over a target that accepts the move action, the default move cursor is shown. When the pointer is over an area that does not accept the transfer, the default "no drop" cursor is shown.
This default handling mechanism is disabled when a custom cursor is set by the {@link #setCursor} method. When the default handling is disabled,it becomes the responsibility of the developer to keep the cursor up to date, by listening to the {@code DragSource} events and calling the {@code setCursor()} method.Alternatively, you can provide custom cursor behavior by providing custom implementations of the {@code DragSource}and the {@code DragSourceContext} classes. @see DragSourceListener @see DragSourceMotionListener @see DnDConstants @since 1.2

java.awt.dnd.DragSourceContext

Examples of ae.java.awt.dnd.DragSourceContext

            this.dispatchType  = dispatchType;
            this.event         = event;
        }


        public void run() {
            DragSourceContext dragSourceContext =
                SunDragSourceContextPeer.this.getDragSourceContext();
            try {
                switch (dispatchType) {
                case DISPATCH_ENTER:
                    dragSourceContext.dragEnter((DragSourceDragEvent)event);
                    break;
                case DISPATCH_MOTION:
                    dragSourceContext.dragOver((DragSourceDragEvent)event);
                    break;
                case DISPATCH_CHANGED:
                    dragSourceContext.dropActionChanged((DragSourceDragEvent)event);
                    break;
                case DISPATCH_EXIT:
                    dragSourceContext.dragExit(event);
                    break;
                case DISPATCH_MOUSE_MOVED:
                    dragSourceContext.dragMouseMoved((DragSourceDragEvent)event);
                    break;
                case DISPATCH_FINISH:
                    try {
                        dragSourceContext.dragDropEnd((DragSourceDropEvent)event);
                    } finally {
                        SunDragSourceContextPeer.this.cleanup();
                    }
                    break;
                default:

View Full Code Here

Examples of java.awt.dnd.DragSourceContext


            awtDragSource.startDrag(trigger, java.awt.Cursor.getDefaultCursor(),
                null, null, localManifestAdapter, new DragSourceListener() {
                @Override
                public void dragEnter(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragExit(DragSourceEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                }


                @Override
                public void dragOver(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dropActionChanged(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragDropEnd(DragSourceDropEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                    dragSource.endDrag(dragDescendantArgument, getDropAction(event.getDropAction()));
                }
            });
        }

View Full Code Here

Examples of java.awt.dnd.DragSourceContext

  
  void testNPE()
  {
    try
      {
        new DragSourceContext(null, null, null, null, null, null, null);
      }
    catch (NullPointerException npe)
      {
        caught = true;
      }
    harness.check(caught);
    caught = false;


    try
      {
        trigger = new DragGestureEvent(new DGR(), DnDConstants.ACTION_COPY,
                                       new Point(), new ArrayList());
        peer = Toolkit.getDefaultToolkit().createDragSourceContextPeer(trigger);
        new DragSourceContext(peer, trigger, cur, null, null, ss, null);
      }
    catch (NullPointerException npe)
      {
        caught = true;
      }
    catch (IllegalArgumentException iae)
      {
      }
    harness.check(!caught);
    caught = false;


    try
      {
        new DragSourceContext(peer, trigger, cur,
                              new BufferedImage(50, 50,
                                                BufferedImage.TYPE_3BYTE_BGR),
                              null, ss, null);
      }
    catch (NullPointerException npe)

View Full Code Here

Examples of java.awt.dnd.DragSourceContext

        DGR dgr = new DGR();
        dgr.setComponent(null);
        trigger = new DragGestureEvent(dgr, DnDConstants.ACTION_COPY,
                                       new Point(), new ArrayList());
        peer = Toolkit.getDefaultToolkit().createDragSourceContextPeer(trigger);
        new DragSourceContext(peer, trigger, cur,
                              new BufferedImage(50, 50,
                                                BufferedImage.TYPE_3BYTE_BGR),
                              new Point(), ss, null);
      }
    catch (IllegalArgumentException iae)
      {
        caught = true;
      }
    harness.check(caught);
    caught = false;


    try
      {
        DGR dgr = new DGR(null);
        trigger = new DragGestureEvent(dgr, DnDConstants.ACTION_COPY,
                                       new Point(), new ArrayList());
        peer = Toolkit.getDefaultToolkit().createDragSourceContextPeer(trigger);
        new DragSourceContext(peer, trigger, cur,
                              new BufferedImage(50, 50,
                                                BufferedImage.TYPE_3BYTE_BGR),
                              new Point(), ss, null);
      }
    catch (IllegalArgumentException iae)
      {
        caught = true;
      }
    harness.check(caught);
    caught = false;


    try
      {
        DGR dgr = new DGR();
        trigger = new DragGestureEvent(dgr, DnDConstants.ACTION_NONE,
                                       new Point(), new ArrayList());
        peer = Toolkit.getDefaultToolkit().createDragSourceContextPeer(trigger);
        new DragSourceContext(peer, trigger, cur,
                              new BufferedImage(50, 50,
                                                BufferedImage.TYPE_3BYTE_BGR),
                              new Point(), ss, null);
      }
    catch (IllegalArgumentException iae)

View Full Code Here

Examples of java.awt.dnd.DragSourceContext

    }


    public void dragEnter(DragSourceDragEvent e)
    {
      dragEnterTar = true;
      DragSourceContext ctx = e.getDragSourceContext();


      int action = e.getDropAction();
      if ((action & DnDConstants.ACTION_COPY) != 0)
        ctx.setCursor(DragSource.DefaultCopyDrop);
      else
        ctx.setCursor(DragSource.DefaultCopyNoDrop);
    }

View Full Code Here

Examples of java.awt.dnd.DragSourceContext


            awtDragSource.startDrag(trigger, java.awt.Cursor.getDefaultCursor(),
                null, null, localManifestAdapter, new DragSourceListener() {
                @Override
                public void dragEnter(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragExit(DragSourceEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                }


                @Override
                public void dragOver(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dropActionChanged(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragDropEnd(DragSourceDropEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                    dragSource.endDrag(dragDescendant, getDropAction(event.getDropAction()));
                }
            });
        }

View Full Code Here

Examples of java.awt.dnd.DragSourceContext

            final DragSourceListener dsl = new DragSourceListener() {
                public void dragDropEnd(DragSourceDropEvent dsde) {
                }


                public void dragEnter(DragSourceDragEvent dsde) {
                    DragSourceContext context = dsde.getDragSourceContext();


                    // Intersection of the users selected action,
                    // and the source and target actions
                    int myaction = dsde.getDropAction();


                    if ((myaction & DnDConstants.ACTION_COPY_OR_MOVE) != 0) {
                        context.setCursor(DragSource.DefaultCopyDrop);
                    } else {
                        context.setCursor(DragSource.DefaultCopyNoDrop);
                    }
                }


                public void dragExit(DragSourceEvent dse) {
                }

View Full Code Here

Examples of java.awt.dnd.DragSourceContext

        final DragSourceListener dsl = new DragSourceListener() {
            public void dragDropEnd(DragSourceDropEvent dsde) {
            }


            public void dragEnter(DragSourceDragEvent dsde) {
                DragSourceContext context = dsde.getDragSourceContext();


                //intersection of the users selected action, and the
                //source and target actions
                int myaction = dsde.getDropAction();


                if ((myaction & DnDConstants.ACTION_COPY) != 0) {
                    context.setCursor(DragSource.DefaultCopyDrop);
                } else {
                    context.setCursor(DragSource.DefaultCopyNoDrop);
                }
            }


            public void dragExit(DragSourceEvent dse) {
            }

View Full Code Here

Examples of java.awt.dnd.DragSourceContext


            awtDragSource.startDrag(trigger, java.awt.Cursor.getDefaultCursor(),
                null, null, localManifestAdapter, new DragSourceListener() {
                @Override
                public void dragEnter(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragExit(DragSourceEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                }


                @Override
                public void dragOver(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dropActionChanged(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragDropEnd(DragSourceDropEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                    dragSource.endDrag(dragDescendantArgument, getDropAction(event.getDropAction()));
                }
            });
        }

View Full Code Here

Examples of java.awt.dnd.DragSourceContext


            awtDragSource.startDrag(trigger, java.awt.Cursor.getDefaultCursor(),
                null, null, localManifestAdapter, new DragSourceListener() {
                @Override
                public void dragEnter(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragExit(DragSourceEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                }


                @Override
                public void dragOver(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dropActionChanged(DragSourceDragEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(getDropCursor(getDropAction(event.getDropAction())));
                }


                @Override
                public void dragDropEnd(DragSourceDropEvent event) {
                    DragSourceContext context = event.getDragSourceContext();
                    context.setCursor(java.awt.Cursor.getDefaultCursor());
                    dragSource.endDrag(dragDescendant, getDropAction(event.getDropAction()));
                }
            });
        }

View Full Code Here

0 1 2

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.