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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.*;
/** RotateScroll. Allows one to rotate the graph by clicking+dragging
* The rotate lens won't work properly unless it's the top lens, because it
* does not account for distortion from above lenses. Methods for getting
* lenses above the current one need to be added to TGLensSet to solve this problem.
*
* @author Alexander Shapiro
* @version 1.22-jre1.1 $Id: RotateScroll.java,v 1.2 2002/09/23 18:45:48 ldornbusch Exp $
*/
public class RotateScroll implements GraphListener {
RotateLens rotateLens;
double rotateAngle;
RotateDragUI rotateDragUI;
private DScrollBar rotateSB;
boolean adjustmentIsInternal;
private TGPanel tgPanel;
// ............
/** Constructor with TGPanel <tt>tgp</tt>.
*/
public RotateScroll(TGPanel tgp) {
tgPanel=tgp;
rotateAngle=0;
rotateLens=new RotateLens();
rotateDragUI = new RotateDragUI();
rotateSB = new DScrollBar(Scrollbar.HORIZONTAL, 0, 80, -314, 318);
rotateSB.addAdjustmentListener(new rotateAdjustmentListener());
adjustmentIsInternal=false;
tgPanel.addGraphListener(this);
}
public RotateLens getLens() { return rotateLens; }
public Scrollbar getRotateSB() { return rotateSB; }
public RotateDragUI getRotateDragUI() { return rotateDragUI; }
public int getRotationAngle() {
double orientedValue = rotateSB.getValue()-rotateSB.getMinimum();
double range = rotateSB.getMaximum()-rotateSB.getMinimum()-rotateSB.getVisibleAmount();
return (int) ((orientedValue/range)*359);
}
public void setRotationAngle(int angle) {
double range = rotateSB.getMaximum()-rotateSB.getMinimum()-rotateSB.getVisibleAmount();
rotateSB.setValue((int) (angle/359.0 * range+0.5)+rotateSB.getMinimum());
}
public void graphMoved() {} //From GraphListener interface
public void graphReset() { rotateAngle=0; rotateSB.setValue(0); } //From GraphListener interface
private class rotateAdjustmentListener implements AdjustmentListener {
public void adjustmentValueChanged(AdjustmentEvent e) {
if(!adjustmentIsInternal) {
rotateAngle = rotateSB.getDValue()/100.0;
tgPanel.repaintAfterMove();
}
}
}
class DScrollBar extends Scrollbar {
private double doubleValue;
DScrollBar(int orient, int val, int vis, int min, int max){
super(orient, val, vis, min, max);
doubleValue=val;
}
public void setValue(int v) { doubleValue = v; super.setValue(v); }
public void setIValue(int v) { super.setValue(v); }
public void setDValue(double v) {
doubleValue = Math.max(getMinimum(),Math.min(getMaximum(),v));
setIValue((int) v);
}
public double getDValue() { return doubleValue;}
}
double computeAngle( double x, double y ) {
double angle=Math.atan(y/x);
if (x==0) //There is probably a better way of hangling boundary conditions, but whatever
if(y>0) angle=Math.PI/2;
else angle=-Math.PI/2;
if (x<0) angle+=Math.PI;
return angle;
}
class RotateLens extends TGAbstractLens {
protected void applyLens(TGPoint2D p) {
double currentAngle=computeAngle(p.x,p.y);
double dist=Math.sqrt((p.x*p.x)+(p.y*p.y));
p.x=dist*Math.cos(currentAngle+rotateAngle);
p.y=dist*Math.sin(currentAngle+rotateAngle);
}
protected void undoLens(TGPoint2D p) {
double currentAngle=computeAngle(p.x,p.y);
double dist=Math.sqrt((p.x*p.x)+(p.y*p.y));
p.x=dist*Math.cos(currentAngle-rotateAngle);
p.y=dist*Math.sin(currentAngle-rotateAngle);
}
}
public void incrementRotateAngle(double inc) {
rotateAngle+=inc;
if (rotateAngle>Math.PI) rotateAngle-=Math.PI*2;
if (rotateAngle<-Math.PI) rotateAngle+=Math.PI*2;
adjustmentIsInternal=true;
rotateSB.setDValue(rotateAngle*100);
adjustmentIsInternal=false;
}
class RotateDragUI extends TGAbstractDragUI { // Will work best if rotate lens is top lens
RotateDragUI() {
super(RotateScroll.this.tgPanel);
}
double lastAngle;
double getMouseAngle(double x, double y) {
return computeAngle(x-this.tgPanel.getDrawCenter().x,
y-this.tgPanel.getDrawCenter().y);
}
public void preActivate() {}
public void preDeactivate() {}
public void mousePressed( MouseEvent e ) {
lastAngle = getMouseAngle(e.getX(), e.getY());
}
public void mouseReleased( MouseEvent e ) {}
public void mouseDragged( MouseEvent e ) {
double currentAngle = getMouseAngle(e.getX(), e.getY());
incrementRotateAngle(currentAngle-lastAngle);
lastAngle=currentAngle;
this.tgPanel.repaintAfterMove();
}
}
} // end com.touchgraph.graphlayout.interaction.RotateScroll
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