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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.io.*;
import java.util.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
/** DragAddUI contains code for adding nodes + edges by dragging.
*
* @author Alexander Shapiro
* @version 1.22-jre1.1 $Id: DragAddUI.java,v 1.1 2002/09/19 15:58:21 ldornbusch Exp $
*/
public class DragAddUI extends TGAbstractDragUI implements TGPaintListener {
Point mousePos = null;
Node dragAddNode = null;
// ............
/** Constructor with provided TGPanel <tt>tgp</tt>.
*/
public DragAddUI( TGPanel tgp ) {
super(tgp);
}
public void preActivate() {
mousePos=null;
tgPanel.addPaintListener(this);
}
public void preDeactivate() {
tgPanel.removePaintListener(this);
};
public void mousePressed( MouseEvent e ) {
dragAddNode = tgPanel.getMouseOverN();
}
public void mouseReleased( MouseEvent e ) {
Node mouseOverN = tgPanel.getMouseOverN();
if (mouseOverN!=null && dragAddNode!=null && mouseOverN!=dragAddNode) {
Edge ed=tgPanel.findEdge(dragAddNode,mouseOverN);
if (ed==null) tgPanel.addEdge(dragAddNode,mouseOverN, Edge.DEFAULT_LENGTH);
else tgPanel.deleteEdge(ed);
} else if ( mouseOverN == null && dragAddNode != null ) {
try {
Node n =tgPanel.addNode();
tgPanel.addEdge(dragAddNode,n, Edge.DEFAULT_LENGTH);
n.drawx = tgPanel.getMousePos().x;
n.drawy = tgPanel.getMousePos().y;
tgPanel.updatePosFromDraw(n);
} catch ( TGException tge ) {
System.err.println(tge.getMessage());
tge.printStackTrace(System.err);
}
}
if (mouseWasDragged) { //Don't reset the damper on a mouseClicked
tgPanel.resetDamper();
tgPanel.startDamper();
}
dragAddNode=null;
}
public void mouseDragged(MouseEvent e) {
mousePos=e.getPoint();
tgPanel.repaint();
}
public void paintFirst(Graphics g) {};
public void paintLast(Graphics g) {};
public void paintAfterEdges(Graphics g) {
if(mousePos==null) return;
Node mouseOverN = tgPanel.getMouseOverN();
if (mouseOverN==null) {
// g.setColor(Node.BACK_DEFAULT_COLOR);
g.drawRect(mousePos.x-7, mousePos.y-7, 14, 14);
}
Color c;
if (mouseOverN==dragAddNode)
c = Color.darkGray;
else
c = Color.blue;
Edge.paintArrow(g, (int) dragAddNode.drawx, (int) dragAddNode.drawy,
mousePos.x, mousePos.y, c);
}
} // end com.touchgraph.graphlayout.interaction.DragAddUI
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