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/*
* TouchGraph LLC. Apache-Style Software License
*
*
* Copyright (c) 2001-2002 Alexander Shapiro. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by
* TouchGraph LLC (http://www.touchgraph.com/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "TouchGraph" or "TouchGraph LLC" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* alex@touchgraph.com
*
* 5. Products derived from this software may not be called "TouchGraph",
* nor may "TouchGraph" appear in their name, without prior written
* permission of alex@touchgraph.com.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL TOUCHGRAPH OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
*/
package com.touchgraph.graphlayout.interaction;
import com.touchgraph.graphlayout.*;
import java.awt.*;
import java.awt.event.*;
/** TGAbstractMousePausedUI allows one to handle MousePaused events.
*
* @author Alexander Shapiro
* @version 1.22-jre1.1 $Id: TGAbstractMousePausedUI.java,v 1.1 2002/09/19 15:58:21 ldornbusch Exp $
*/
public abstract class TGAbstractMousePausedUI extends TGUserInterface {
private AMPUIMouseMotionListener mml;
private AMPUIMouseListener ml;
protected TGPanel tgPanel;
Point mousePos=null;
PauseThread pauseThread=null;
// ............
/** Constructor with TGPanel <tt>tgp</tt>.
*/
public TGAbstractMousePausedUI( TGPanel tgp ) { // Instantiate this way to keep listening
// for clicks until deactivate is called
tgPanel=tgp;
ml = new AMPUIMouseListener();
mml = new AMPUIMouseMotionListener();
}
public final void activate() {
preActivate();
tgPanel.addMouseMotionListener(mml);
tgPanel.addMouseListener(ml);
}
public final void deactivate() {
tgPanel.removeMouseMotionListener(mml);
tgPanel.removeMouseListener(ml);
postDeactivate();
super.deactivate(); //To activate parentUI from TGUserInterface
}
public void preActivate() {}
public void postDeactivate() {}
public abstract void mousePaused(MouseEvent e);
public abstract void mouseMoved(MouseEvent e);
public abstract void mouseDragged(MouseEvent e);
class PauseThread extends Thread{
boolean resetSleep;
boolean cancelled;
PauseThread() { cancelled = false; start(); }
void reset() { resetSleep = true; cancelled = false; }
void cancel() { cancelled = true; }
public void run() {
try {
do { resetSleep=false; sleep(250); } while (resetSleep);
if (!cancelled) {
MouseEvent pausedEvent =
new MouseEvent(tgPanel,MouseEvent.MOUSE_ENTERED, 0,0, mousePos.x,mousePos.y,0,false);
mousePaused(pausedEvent);
}
}
catch (Exception e) {e.printStackTrace();}
}
}
public void resetPause() {
if (pauseThread!=null && pauseThread.isAlive()) pauseThread.reset();
else pauseThread = new PauseThread();
}
public void cancelPause() {
if (pauseThread!=null && pauseThread.isAlive()) pauseThread.cancel();
}
private class AMPUIMouseMotionListener implements MouseMotionListener {
public void mouseMoved(MouseEvent e) {
mousePos=e.getPoint();
resetPause();
TGAbstractMousePausedUI.this.mouseMoved(e);
}
public void mouseDragged(MouseEvent e) {
mousePos=e.getPoint();
resetPause();
TGAbstractMousePausedUI.this.mouseDragged(e);
}
}
private class AMPUIMouseListener extends MouseAdapter {
public void mousePressed(MouseEvent e) {
cancelPause();
}
public void mouseReleased(MouseEvent e) {
cancelPause();
}
public void mouseExited(MouseEvent e) {
//cancelPause();
}
}
} // end com.touchgraph.graphlayout.interaction.TGAbstractMousePauseUI
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