Initial revision
From-SVN: r102074
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Tom Tromey
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/* DropTarget.java --
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Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt.dnd;
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import java.awt.Component;
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import java.awt.GraphicsEnvironment;
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import java.awt.HeadlessException;
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import java.awt.Point;
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import java.awt.datatransfer.FlavorMap;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.io.Serializable;
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import java.util.EventListener;
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import java.util.TooManyListenersException;
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/**
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* @author Michael Koch
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* @since 1.2
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*/
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public class DropTarget
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implements DropTargetListener, EventListener, Serializable
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{
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/**
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* Compatible with JDK 1.2+
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*/
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private static final long serialVersionUID = -6283860791671019047L;
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/** @specnote According to the online documentation, this is
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* protected, but in reality it is public. */
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public static class DropTargetAutoScroller
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implements ActionListener
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{
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private Component component;
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private Point point;
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protected DropTargetAutoScroller (Component c, Point p)
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{
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component = c;
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point = p;
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}
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protected void updateLocation (Point newLocn)
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{
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point = newLocn;
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}
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protected void stop ()
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{
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}
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public void actionPerformed (ActionEvent e)
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{
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}
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}
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private Component component;
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private FlavorMap flavorMap;
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private int actions;
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private DropTargetContext dropTargetContext;
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private DropTargetListener dropTargetListener;
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private boolean active = true;
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/**
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* Creates a <code>DropTarget</code> object.
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*
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* @exception HeadlessException If GraphicsEnvironment.isHeadless()
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* returns true.
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*/
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public DropTarget ()
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{
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this (null, 0, null, true, null);
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}
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/**
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* Creates a <code>DropTarget</code> object.
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*
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* @exception HeadlessException If GraphicsEnvironment.isHeadless()
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* returns true.
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*/
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public DropTarget (Component c, DropTargetListener dtl)
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{
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this (c, 0, dtl, true, null);
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}
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/**
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* Creates a <code>DropTarget</code> object.
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*
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* @exception HeadlessException If GraphicsEnvironment.isHeadless()
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* returns true.
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*/
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public DropTarget (Component c, int i, DropTargetListener dtl)
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{
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this (c, i, dtl, true, null);
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}
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/**
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* Creates a <code>DropTarget</code> object.
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*
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* @exception HeadlessException If GraphicsEnvironment.isHeadless()
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* returns true.
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*/
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public DropTarget (Component c, int i, DropTargetListener dtl, boolean b)
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{
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this (c, i, dtl, b, null);
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}
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/**
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* Creates a <code>DropTarget</code> object.
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*
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* @exception HeadlessException If GraphicsEnvironment.isHeadless()
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* returns true.
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*/
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public DropTarget (Component c, int i, DropTargetListener dtl, boolean b,
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FlavorMap fm)
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{
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if (GraphicsEnvironment.isHeadless ())
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throw new HeadlessException ();
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component = c;
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actions = i;
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dropTargetListener = dtl;
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flavorMap = fm;
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setActive (b);
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}
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/**
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* Sets the component associated with this drop target object.
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*/
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public void setComponent (Component c)
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{
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component = c;
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}
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/**
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* Returns the component associated with this drop target object.
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*/
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public Component getComponent ()
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{
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return component;
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}
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/**
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* Sets the default actions.
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*/
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public void setDefaultActions (int ops)
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{
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actions = ops;
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}
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/**
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* Returns the default actions.
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*/
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public int getDefaultActions ()
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{
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return actions;
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}
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public void setActive (boolean active)
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{
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this.active = active;
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}
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public boolean isActive()
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{
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return active;
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}
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/**
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* Adds a new <code>DropTargetListener</code>.
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*
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* @exception TooManyListenersException Sun's JDK does not, despite
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* documentation, throw this exception here when you install an additional
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* <code>DropTargetListener</code>. So to be compatible, we do the same
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* thing.
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*/
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public void addDropTargetListener (DropTargetListener dtl)
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throws TooManyListenersException
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{
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dropTargetListener = dtl;
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}
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public void removeDropTargetListener(DropTargetListener dtl)
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{
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// FIXME: Do we need to do something with dtl ?
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dropTargetListener = null;
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}
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public void dragEnter(DropTargetDragEvent dtde)
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{
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}
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public void dragOver(DropTargetDragEvent dtde)
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{
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}
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public void dropActionChanged(DropTargetDragEvent dtde)
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{
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}
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public void dragExit(DropTargetEvent dte)
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{
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}
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public void drop(DropTargetDropEvent dtde)
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{
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}
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public FlavorMap getFlavorMap()
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{
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return flavorMap;
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}
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public void setFlavorMap(FlavorMap fm)
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{
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flavorMap = fm;
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}
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public void addNotify(java.awt.peer.ComponentPeer peer)
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{
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}
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public void removeNotify(java.awt.peer.ComponentPeer peer)
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{
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}
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public DropTargetContext getDropTargetContext()
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{
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if (dropTargetContext == null)
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dropTargetContext = createDropTargetContext ();
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return dropTargetContext;
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}
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protected DropTargetContext createDropTargetContext()
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{
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return new DropTargetContext (this);
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}
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protected DropTarget.DropTargetAutoScroller createDropTargetAutoScroller
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(Component c, Point p)
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{
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return new DropTarget.DropTargetAutoScroller (c, p);
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}
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protected void initializeAutoscrolling(Point p)
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{
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}
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protected void updateAutoscroll(Point dragCursorLocn)
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{
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}
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protected void clearAutoscroll()
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{
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}
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} // class DropTarget
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