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

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