bundles/org.simantics.scenegraph.swing/src/org/simantics/scenegraph/example/SGCanvas.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.scenegraph.example;
  13
  14 import java.awt.Graphics;
  15 import java.awt.Graphics2D;
  16 import java.awt.Rectangle;
  17 import java.awt.event.FocusEvent;
  18 import java.awt.event.FocusListener;
  19 import java.awt.event.KeyEvent;
  20 import java.awt.event.KeyListener;
  21 import java.awt.event.MouseEvent;
  22 import java.awt.event.MouseListener;
  23 import java.awt.event.MouseMotionListener;
  24 import java.awt.event.MouseWheelEvent;
  25 import java.awt.event.MouseWheelListener;
  26 import java.awt.image.VolatileImage;
  27
  28 import javax.swing.JComponent;
  29
  30 import org.simantics.scenegraph.g2d.G2DFocusManager;
  31 import org.simantics.scenegraph.g2d.G2DSceneGraph;
  32
  33 public class SGCanvas extends JComponent implements MouseListener, MouseMotionListener, MouseWheelListener, KeyListener, FocusListener {
  34         /**
  35          *
  36          */
  37         private static final long serialVersionUID = -7835590396125816119L;
  38
  39         private G2DSceneGraph scenegraph = null;
  40     private VolatileImage buffer = null;
  41
  42         public SGCanvas() {
  43                 setFocusable(true);
  44         }
  45
  46         public void initListeners() {
  47         addKeyListener(this);
  48         addMouseWheelListener(this);
  49         addMouseListener(this);
  50         addMouseMotionListener(this);
  51         addFocusListener(this);
  52         }
  53
  54         @Override
  55     public void paintComponent(Graphics g) {
  56         if (scenegraph == null) return;
  57         Graphics2D      g2d             = (Graphics2D) g;
  58         Rectangle       b               = getBounds();
  59
  60         int newWidth = b.width;
  61         int newHeight = b.height;
  62
  63         if (buffer == null) {
  64             buffer = createVolatileImage(newWidth, newHeight);
  65         } else {
  66             int w = buffer.getWidth();
  67             int h = buffer.getHeight();
  68             if (w != newWidth || h != newHeight) {
  69                 buffer = createVolatileImage(newWidth, newHeight);
  70             } else {
  71                 int valid = buffer.validate(g2d.getDeviceConfiguration());
  72                 if (valid == VolatileImage.IMAGE_INCOMPATIBLE) {
  73                     buffer = createVolatileImage(newWidth, newHeight);
  74                 }
  75             }
  76         }
  77
  78         Graphics2D bg = (Graphics2D) buffer.getGraphics();
  79
  80         bg.setClip((int)b.getMinX(), (int)b.getMinY(), (int)b.getWidth(), (int)b.getHeight());
  81         scenegraph.render(bg);
  82         g2d.drawImage(buffer, 0, 0, null);
  83     }
  84
  85         public void setSceneGraph(G2DSceneGraph scenegraph) {
  86                 this.scenegraph = scenegraph;
  87                 scenegraph.setRootPane(this);
  88         }
  89
  90         public G2DSceneGraph getSceneGraph() {
  91                 return scenegraph;
  92         }
  93
  94         @Override
  95         public void mouseWheelMoved(MouseWheelEvent event) {
  96                 if(scenegraph != null) {
  97                         scenegraph.getEventDelegator().mouseWheelMoved(event);
  98                         repaint();
  99                 }
 100         }
 101
 102         @Override
 103         public void keyPressed(KeyEvent event) {
 104                 if(scenegraph != null)
 105                         scenegraph.getEventDelegator().keyPressed(event);
 106         }
 107
 108         @Override
 109         public void keyReleased(KeyEvent event) {
 110                 if(scenegraph != null)
 111                         scenegraph.getEventDelegator().keyReleased(event);
 112         }
 113
 114         @Override
 115         public void keyTyped(KeyEvent event) {
 116                 if(scenegraph != null)
 117                         scenegraph.getEventDelegator().keyTyped(event);
 118         }
 119
 120         @Override
 121         public void focusGained(FocusEvent event) {
 122                 if(scenegraph != null)
 123                         scenegraph.getEventDelegator().focusGained(event);
 124         }
 125
 126         @Override
 127         public void focusLost(FocusEvent event) {
 128                 if(scenegraph != null)
 129                         scenegraph.getEventDelegator().focusLost(event);
 130         }
 131
 132         @Override
 133         public void mouseClicked(MouseEvent event) {
 134                 if(scenegraph != null) {
 135                         scenegraph.getEventDelegator().mouseClicked(event);
 136                         repaint();
 137                 }
 138         }
 139
 140         @Override
 141         public void mouseEntered(MouseEvent event) {
 142                 if(scenegraph != null)
 143                         scenegraph.getEventDelegator().mouseEntered(event);
 144         }
 145
 146         @Override
 147         public void mouseExited(MouseEvent event) {
 148                 if(scenegraph != null)
 149                         scenegraph.getEventDelegator().mouseExited(event);
 150         }
 151
 152         @Override
 153         public void mousePressed(MouseEvent event) {
 154                 if(scenegraph != null) {
 155                         G2DFocusManager.INSTANCE.clearFocus();
 156                         scenegraph.getEventDelegator().mousePressed(event);
 157                         if(G2DFocusManager.INSTANCE.getFocusOwner() == null) {
 158                                 this.requestFocusInWindow();
 159                         }
 160                         repaint();
 161                 }
 162         }
 163
 164         @Override
 165         public void mouseReleased(MouseEvent event) {
 166                 if(scenegraph != null)
 167                         scenegraph.getEventDelegator().mouseReleased(event);
 168         }
 169
 170         @Override
 171         public void mouseDragged(MouseEvent event) {
 172                 if(scenegraph != null) {
 173                         scenegraph.getEventDelegator().mouseDragged(event);
 174                         repaint();
 175                 }
 176         }
 177
 178         @Override
 179         public void mouseMoved(MouseEvent event) {
 180                 if(scenegraph != null)
 181                         scenegraph.getEventDelegator().mouseMoved(event);
 182         }
 183
 184 }