| /* DropTarget.java -- |
| Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package java.awt.dnd; |
| |
| import java.awt.Component; |
| import java.awt.GraphicsEnvironment; |
| import java.awt.HeadlessException; |
| import java.awt.Point; |
| import java.awt.datatransfer.FlavorMap; |
| import java.awt.event.ActionEvent; |
| import java.awt.event.ActionListener; |
| import java.io.Serializable; |
| import java.util.EventListener; |
| import java.util.TooManyListenersException; |
| |
| /** |
| * @author Michael Koch |
| * @since 1.2 |
| */ |
| public class DropTarget |
| implements DropTargetListener, EventListener, Serializable |
| { |
| /** |
| * Compatible with JDK 1.2+ |
| */ |
| private static final long serialVersionUID = -6283860791671019047L; |
| |
| /** @specnote According to the online documentation, this is |
| * protected, but in reality it is public. */ |
| public static class DropTargetAutoScroller |
| implements ActionListener |
| { |
| private Component component; |
| private Point point; |
| |
| protected DropTargetAutoScroller (Component c, Point p) |
| { |
| component = c; |
| point = p; |
| } |
| |
| protected void updateLocation (Point newLocn) |
| { |
| point = newLocn; |
| } |
| |
| protected void stop () |
| { |
| } |
| |
| public void actionPerformed (ActionEvent e) |
| { |
| } |
| } |
| |
| private Component component; |
| private FlavorMap flavorMap; |
| private int actions; |
| private DropTargetContext dropTargetContext; |
| private DropTargetListener dropTargetListener; |
| private boolean active = true; |
| |
| /** |
| * Creates a <code>DropTarget</code> object. |
| * |
| * @exception HeadlessException If GraphicsEnvironment.isHeadless() |
| * returns true. |
| */ |
| public DropTarget () |
| { |
| this (null, 0, null, true, null); |
| } |
| |
| /** |
| * Creates a <code>DropTarget</code> object. |
| * |
| * @exception HeadlessException If GraphicsEnvironment.isHeadless() |
| * returns true. |
| */ |
| public DropTarget (Component c, DropTargetListener dtl) |
| { |
| this (c, 0, dtl, true, null); |
| } |
| |
| /** |
| * Creates a <code>DropTarget</code> object. |
| * |
| * @exception HeadlessException If GraphicsEnvironment.isHeadless() |
| * returns true. |
| */ |
| public DropTarget (Component c, int i, DropTargetListener dtl) |
| { |
| this (c, i, dtl, true, null); |
| } |
| |
| /** |
| * Creates a <code>DropTarget</code> object. |
| * |
| * @exception HeadlessException If GraphicsEnvironment.isHeadless() |
| * returns true. |
| */ |
| public DropTarget (Component c, int i, DropTargetListener dtl, boolean b) |
| { |
| this (c, i, dtl, b, null); |
| } |
| |
| /** |
| * Creates a <code>DropTarget</code> object. |
| * |
| * @exception HeadlessException If GraphicsEnvironment.isHeadless() |
| * returns true. |
| */ |
| public DropTarget (Component c, int i, DropTargetListener dtl, boolean b, |
| FlavorMap fm) |
| { |
| if (GraphicsEnvironment.isHeadless ()) |
| throw new HeadlessException (); |
| |
| component = c; |
| actions = i; |
| dropTargetListener = dtl; |
| flavorMap = fm; |
| |
| setActive (b); |
| } |
| |
| /** |
| * Sets the component associated with this drop target object. |
| */ |
| public void setComponent (Component c) |
| { |
| component = c; |
| } |
| |
| /** |
| * Returns the component associated with this drop target object. |
| */ |
| public Component getComponent () |
| { |
| return component; |
| } |
| |
| /** |
| * Sets the default actions. |
| */ |
| public void setDefaultActions (int ops) |
| { |
| actions = ops; |
| } |
| |
| /** |
| * Returns the default actions. |
| */ |
| public int getDefaultActions () |
| { |
| return actions; |
| } |
| |
| public void setActive (boolean active) |
| { |
| this.active = active; |
| } |
| |
| public boolean isActive() |
| { |
| return active; |
| } |
| |
| /** |
| * Adds a new <code>DropTargetListener</code>. |
| * |
| * @exception TooManyListenersException Sun's JDK does not, despite |
| * documentation, throw this exception here when you install an additional |
| * <code>DropTargetListener</code>. So to be compatible, we do the same |
| * thing. |
| */ |
| public void addDropTargetListener (DropTargetListener dtl) |
| throws TooManyListenersException |
| { |
| dropTargetListener = dtl; |
| } |
| |
| public void removeDropTargetListener(DropTargetListener dtl) |
| { |
| // FIXME: Do we need to do something with dtl ? |
| dropTargetListener = null; |
| } |
| |
| public void dragEnter(DropTargetDragEvent dtde) |
| { |
| } |
| |
| public void dragOver(DropTargetDragEvent dtde) |
| { |
| } |
| |
| public void dropActionChanged(DropTargetDragEvent dtde) |
| { |
| } |
| |
| public void dragExit(DropTargetEvent dte) |
| { |
| } |
| |
| public void drop(DropTargetDropEvent dtde) |
| { |
| } |
| |
| public FlavorMap getFlavorMap() |
| { |
| return flavorMap; |
| } |
| |
| public void setFlavorMap(FlavorMap fm) |
| { |
| flavorMap = fm; |
| } |
| |
| public void addNotify(java.awt.peer.ComponentPeer peer) |
| { |
| } |
| |
| public void removeNotify(java.awt.peer.ComponentPeer peer) |
| { |
| } |
| |
| public DropTargetContext getDropTargetContext() |
| { |
| if (dropTargetContext == null) |
| dropTargetContext = createDropTargetContext (); |
| |
| return dropTargetContext; |
| } |
| |
| protected DropTargetContext createDropTargetContext() |
| { |
| return new DropTargetContext (this); |
| } |
| |
| protected DropTarget.DropTargetAutoScroller createDropTargetAutoScroller |
| (Component c, Point p) |
| { |
| return new DropTarget.DropTargetAutoScroller (c, p); |
| } |
| |
| protected void initializeAutoscrolling(Point p) |
| { |
| } |
| |
| protected void updateAutoscroll(Point dragCursorLocn) |
| { |
| } |
| |
| protected void clearAutoscroll() |
| { |
| } |
| } // class DropTarget |