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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.event.*;
import java.awt.*;
//import javax.swing.*;
/** ZoomScroll: Contains code for enlarging the graph by zooming in.
*
* @author Alexander Shapiro
* @version 1.21 $Id: ZoomScroll.java,v 1.2 2002/09/23 18:45:48 ldornbusch Exp $
*/
public class ZoomScroll implements GraphListener {
protected ZoomLens zoomLens;
private Scrollbar zoomSB;
private TGPanel tgPanel;
// ............
/** Constructor with TGPanel <tt>tgp</tt>.
*/
public ZoomScroll( TGPanel tgp ) {
tgPanel=tgp;
zoomSB = new Scrollbar(Scrollbar.HORIZONTAL, -4, 7, -31, 19);
zoomSB.addAdjustmentListener(new zoomAdjustmentListener());
zoomLens=new ZoomLens();
tgPanel.addGraphListener(this);
}
public Scrollbar getZoomSB() { return zoomSB; }
public ZoomLens getLens() { return zoomLens; }
public void graphMoved() {} //From GraphListener interface
public void graphReset() { zoomSB.setValue(-10); } //From GraphListener interface
public int getZoomValue() {
double orientedValue = zoomSB.getValue()-zoomSB.getMinimum();
double range = zoomSB.getMaximum()-zoomSB.getMinimum()-zoomSB.getVisibleAmount();
return (int) ((orientedValue/range)*200-100);
}
public void setZoomValue(int value) {
double range = zoomSB.getMaximum()-zoomSB.getMinimum()-zoomSB.getVisibleAmount();
zoomSB.setValue((int) ((value+100)/200.0 * range+0.5)+zoomSB.getMinimum());
}
private class zoomAdjustmentListener implements AdjustmentListener {
public void adjustmentValueChanged(AdjustmentEvent e) {
tgPanel.repaintAfterMove();
}
}
class ZoomLens extends TGAbstractLens {
protected void applyLens(TGPoint2D p) {
p.x=p.x*Math.pow(2,zoomSB.getValue()/10.0);
p.y=p.y*Math.pow(2,zoomSB.getValue()/10.0);
}
protected void undoLens(TGPoint2D p) {
p.x=p.x/Math.pow(2,zoomSB.getValue()/10.0);
p.y=p.y/Math.pow(2,zoomSB.getValue()/10.0);
}
}
} // end com.touchgraph.graphlayout.interaction.ZoomScroll
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