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AppletCanvas.java

/*
 *  $RCSfile$
 *  $Author: egonw $
 *  $Date: 2007-05-01 21:15:34 +0200 (Tue, 01 May 2007) $
 *  $Revision: 8292 $
 *
 *  Copyright (C) 2002-2007  The Jmol Development Team
 *
 *  Contact: jmol-developers@lists.sf.net
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1
 *  of the License, or (at your option) any later version.
 *  All we ask is that proper credit is given for our work, which includes
 *  - but is not limited to - adding the above copyright notice to the beginning
 *  of your source code files, and to any copyright notice that you may distribute
 *  with programs based on this work.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 */
package org.openscience.cdk.applications.jchempaint.applet;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Iterator;

import javax.vecmath.Point2d;

import org.openscience.cdk.Atom;
import org.openscience.cdk.interfaces.IAtomContainer;
import org.openscience.cdk.applications.jchempaint.JChemPaintModel;
import org.openscience.cdk.geometry.GeometryTools;
import org.openscience.cdk.renderer.Renderer2D;
import org.openscience.cdk.tools.manipulator.ChemModelManipulator;

/**
 * The canvas for a JChempaint applet
 *
 * @cdk.module jchempaint.applet
 * @author     steinbeck
 */
00052 public class AppletCanvas extends Canvas
{

    private static final long serialVersionUID = 5776370310193515006L;
    
    private Renderer2D renderer;
      private JChemPaintModel model;


      /**
       *  Sets the renderer attribute of the AppletCanvas object
       *
       *@param  renderer  The new renderer value
       */
00066       public void setRenderer(Renderer2D renderer)
      {
            this.renderer = renderer;
      }

      public void update(Graphics g)
      {
            paint(g);
      }


      /**
       *  Sets the jChemPaintModel attribute of the AppletCanvas object
       *
       *@param  model  The new jChemPaintModel value
       */
00082       public void setJChemPaintModel(JChemPaintModel model)
      {
            this.model = model;
      }

      public void paint(Graphics g)
      {
            renderer.getRenderer2DModel().setBackgroundDimension(getSize());
            IAtomContainer container = null;
            if (model != null) {
                  container = model.getChemModel().getBuilder().newAtomContainer();
            Iterator containers = ChemModelManipulator.getAllAtomContainers(model.getChemModel()).iterator();
            while (containers.hasNext()) {
                  container.add((IAtomContainer)containers.next());
            }
            } else
            {
                  Atom carbon = new Atom("C");
                  carbon.setHydrogenCount(4);
                  carbon.setPoint2d(new Point2d(1.0, 1.0));
                  container.addAtom(carbon);
            }
            /*
             *  this code ensures that the molecule ends up somewhere in the model
             *  of the view screen
             */
            GeometryTools.translateAllPositive(container,renderer.getRenderer2DModel().getRenderingCoordinates());
            double scaleFactor = GeometryTools.getScaleFactor(container, 40.0,renderer.getRenderer2DModel().getRenderingCoordinates());
            GeometryTools.scaleMolecule(container, scaleFactor,renderer.getRenderer2DModel().getRenderingCoordinates());
            GeometryTools.center(container, getSize(),renderer.getRenderer2DModel().getRenderingCoordinates());

            setBackground(Color.white);
            if (model != null)
            {
                  renderer.paintChemModel(model.getChemModel(), (Graphics2D) g);
            } else
            {
                  renderer.paintMolecule(container, (Graphics2D) g,false,true);
            }
      }

}


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