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/*
* TouchGraph Software License
*
*
* Copyright (c) 2001 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 (http://www.touchgraph.com/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The name "TouchGraph" 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 TouchGraph.
*
* 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.*;
/** HVRotateDragUI. A combination of HVScrolling + rotating.
* The graph is rotated, but the mouse is always kept on the same point
* on the graph.
*
* @author Alexander Shapiro
* @version 1.06
*/
public class HVRotateDragUI extends TGAbstractDragUI implements TGPaintListener {
HVScroll hvScroll;
RotateScroll rotateScroll;
Node mouseOverN;
Node tempNode;
TGPoint2D lastMousePos;
double lastAngle;
// ............
/** Constructor with TGPanel <tt>tgp</tt>, HVScroll <tt>hvs</tt>
* and a RotateScroll <tt>rs</tt>.
*/
public HVRotateDragUI( TGPanel tgp, HVScroll hvs, RotateScroll rs ) {
super(tgp);
hvScroll = hvs;
rotateScroll = rs;
}
double graphDist(double x, double y) {
double adjx=(x-this.tgPanel.getDrawCenter().x);
double adjy=(y-this.tgPanel.getDrawCenter().y);
return Math.sqrt(adjx*adjx+adjy*adjy);
}
double getMouseAngle(double x, double y) {
double adjx=(x-this.tgPanel.getDrawCenter().x);
double adjy=(y-this.tgPanel.getDrawCenter().y);
double ang = Math.atan(adjy/adjx);
if (adjx==0)
if(adjy>0) ang=Math.PI/2;
else ang=-Math.PI/2;
if(adjx<0) ang=ang+Math.PI;
return ang;
}
public void preActivate() {
tgPanel.addPaintListener(this);
}
public void preDeactivate() {
tgPanel.removePaintListener(this);
tgPanel.repaint();
}
public void mousePressed(MouseEvent e) {
mouseOverN=tgPanel.getMouseOverN();
if (mouseOverN!=null) {
lastMousePos = new TGPoint2D(mouseOverN.drawx, mouseOverN.drawy);
lastAngle = getMouseAngle(mouseOverN.drawx, mouseOverN.drawy);
} else {
tempNode=new Node(); //A hack, until lenses are better implemented
//One should keep track of a real position on the graph
//As opposed to having a temporary node do this task.
tempNode.drawx = e.getX();
tempNode.drawy = e.getY();
tgPanel.updatePosFromDraw(tempNode);
lastMousePos = new TGPoint2D(tempNode.drawx, tempNode.drawy);
lastAngle = getMouseAngle(tempNode.drawx, tempNode.drawy);
}
}
public void mouseReleased( MouseEvent e ) {}
public void mouseDragged( MouseEvent e ) {
double currX = e.getX();
double currY = e.getY();
double currDist = graphDist(currX,currY);
if (mouseOverN!=null)
lastAngle = getMouseAngle(mouseOverN.drawx, mouseOverN.drawy);
else
lastAngle = getMouseAngle(tempNode.drawx, tempNode.drawy);
double currentAngle = getMouseAngle(currX, currY);
if(lastAngle>currentAngle+Math.PI) currentAngle+=Math.PI*2; //Avoids bug at x==0
else if(currentAngle>lastAngle+Math.PI) lastAngle+=Math.PI*2;
if (currDist>60) rotateScroll.incrementRotateAngle((currentAngle-lastAngle));
tgPanel.updateDrawPositions(); //Rotate, but don't redraw
tgPanel.updateGraphSize(); //Just in case. Mostly effects H+V Scrollbars
if(tempNode!=null) tgPanel.updateDrawPos(tempNode); //The temporary node is not part of the graph,
//So it needs to be updated individually
TGPoint2D lastMousePos;
if(mouseOverN!=null)
lastMousePos = new TGPoint2D(mouseOverN.drawx, mouseOverN.drawy);
else
lastMousePos = new TGPoint2D(tempNode.drawx, tempNode.drawy);
TGPoint2D newPos = new TGPoint2D(currX,currY);
if (!hvScroll.scrolling) hvScroll.scrollAtoB(lastMousePos, newPos); //Scroll the node to the mouse
this.tgPanel.repaintAfterMove();
if(tempNode!=null) tgPanel.updateDrawPos(tempNode); //The temporary node is not part of the graph,
//So it needs to be updated individually
}
public void paintFirst( Graphics g ) {
TGPoint2D drawCenter = tgPanel.getDrawCenter();
g.setColor(Color.lightGray);
for(int i=0;i<16;i++) {
double ang = Math.PI*2*i/16;
double rayX = 1000*Math.cos(ang);
double rayY = 1000*Math.sin(ang);
g.drawLine((int) drawCenter.x, (int) drawCenter.y,
(int) (rayX+drawCenter.x),(int) (rayY+drawCenter.y));
g.drawLine((int) drawCenter.x+1, (int) drawCenter.y,
(int) (rayX+drawCenter.x+1),(int) (rayY+drawCenter.y));
g.drawLine((int) drawCenter.x, (int) drawCenter.y+1,
(int) (rayX+drawCenter.x),(int) (rayY+drawCenter.y+1));
g.drawLine((int) drawCenter.x+1, (int) drawCenter.y+1,
(int) (rayX+drawCenter.x+1),(int) (rayY+drawCenter.y+1));
}
g.fillOval((int)drawCenter.x-60, (int) drawCenter.y-60, 120,120);
g.setColor(tgPanel.BACK_COLOR);
g.fillOval((int)drawCenter.x-58, (int) drawCenter.y-58, 116,116);
}
public void paintLast( Graphics g ) {}
public void paintAfterEdges( Graphics g ) {}
} // end com.touchgraph.graphlayout.interaction.HVRotateDragUI
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