1 /*
2 * TouchGraph LLC. Apache-Style Software License
3 *
4 *
5 * Copyright (c) 2001-2002 Alexander Shapiro. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by
22 * TouchGraph LLC (http://www.touchgraph.com/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "TouchGraph" or "TouchGraph LLC" must not be used to endorse
27 * or promote products derived from this software without prior written
28 * permission. For written permission, please contact
29 * alex@touchgraph.com
30 *
31 * 5. Products derived from this software may not be called "TouchGraph",
32 * nor may "TouchGraph" appear in their name, without prior written
33 * permission of alex@touchgraph.com.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL TOUCHGRAPH OR ITS CONTRIBUTORS BE
39 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
40 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
41 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
42 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
43 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
44 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
45 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 * ====================================================================
47 *
48 */
49
50 package com.touchgraph.graphlayout.interaction;
51
52 import java.awt.Point;
53 import java.awt.event.*;
54
55 import com.touchgraph.graphlayout.TGPanel;
56
57 /*** TGAbstractMousePausedUI allows one to handle MousePaused events.
58 *
59 * @author Alexander Shapiro
60 * @version 1.21 $Id: TGAbstractMousePausedUI.java,v 1.1.1.1 2004/02/06 08:44:07 keesj Exp $
61 */
62 public abstract class TGAbstractMousePausedUI extends TGUserInterface {
63
64 private AMPUIMouseMotionListener mml;
65 private AMPUIMouseListener ml;
66 protected TGPanel tgPanel;
67 Point mousePos=null;
68 PauseThread pauseThread=null;
69
70 // ............
71
72 /*** Constructor with TGPanel <tt>tgp</tt>.
73 */
74 public TGAbstractMousePausedUI( TGPanel tgp ) { // Instantiate this way to keep listening
75 // for clicks until deactivate is called
76 tgPanel=tgp;
77 ml = new AMPUIMouseListener();
78 mml = new AMPUIMouseMotionListener();
79 }
80
81 public final void activate() {
82 preActivate();
83 tgPanel.addMouseMotionListener(mml);
84 tgPanel.addMouseListener(ml);
85 }
86
87 public final void deactivate() {
88 tgPanel.removeMouseMotionListener(mml);
89 tgPanel.removeMouseListener(ml);
90 postDeactivate();
91 super.deactivate(); //To activate parentUI from TGUserInterface
92 }
93
94 public void preActivate() {}
95 public void postDeactivate() {}
96 public abstract void mousePaused(MouseEvent e);
97 public abstract void mouseMoved(MouseEvent e);
98 public abstract void mouseDragged(MouseEvent e);
99
100 class PauseThread extends Thread{
101 boolean resetSleep;
102 boolean cancelled;
103 PauseThread() { cancelled = false; start(); }
104
105 void reset() { resetSleep = true; cancelled = false; }
106 void cancel() { cancelled = true; }
107
108 public void run() {
109 try {
110 do { resetSleep=false; sleep(250); } while (resetSleep);
111 if (!cancelled) {
112 MouseEvent pausedEvent =
113 new MouseEvent(tgPanel,MouseEvent.MOUSE_ENTERED, 0,0, mousePos.x,mousePos.y,0,false);
114 mousePaused(pausedEvent);
115 }
116 }
117 catch (Exception e) {e.printStackTrace();}
118 }
119 }
120
121 public void resetPause() {
122 if (pauseThread!=null && pauseThread.isAlive()) pauseThread.reset();
123 else pauseThread = new PauseThread();
124 }
125
126 public void cancelPause() {
127 if (pauseThread!=null && pauseThread.isAlive()) pauseThread.cancel();
128 }
129
130 private class AMPUIMouseMotionListener implements MouseMotionListener {
131 public void mouseMoved(MouseEvent e) {
132 mousePos=e.getPoint();
133 resetPause();
134 TGAbstractMousePausedUI.this.mouseMoved(e);
135 }
136
137 public void mouseDragged(MouseEvent e) {
138 mousePos=e.getPoint();
139 resetPause();
140 TGAbstractMousePausedUI.this.mouseDragged(e);
141 }
142 }
143
144 private class AMPUIMouseListener extends MouseAdapter {
145 public void mousePressed(MouseEvent e) {
146 cancelPause();
147 }
148 public void mouseReleased(MouseEvent e) {
149 cancelPause();
150 }
151 public void mouseExited(MouseEvent e) {
152 //cancelPause();
153 }
154 }
155
156 } // end com.touchgraph.graphlayout.interaction.TGAbstractMousePauseUI