bundles/org.simantics.g2d/src/org/simantics/g2d/participant/BackgroundPainter.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.g2d.participant;\r
  13 \r
  14 import java.awt.Color;\r
  15 import java.awt.Paint;\r
  16 \r
  17 import org.simantics.g2d.canvas.Hints;\r
  18 import org.simantics.g2d.canvas.SGDesignation;\r
  19 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;\r
  20 import org.simantics.g2d.canvas.impl.HintReflection.HintListener;\r
  21 import org.simantics.g2d.canvas.impl.SGNodeReflection.SGCleanup;\r
  22 import org.simantics.g2d.canvas.impl.SGNodeReflection.SGInit;\r
  23 import org.simantics.scenegraph.g2d.G2DParentNode;\r
  24 import org.simantics.scenegraph.g2d.nodes.BackgroundNode;\r
  25 import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
  26 import org.simantics.utils.datastructures.hints.IHintObservable;\r
  27 \r
  28 /**\r
  29  * Paints background wither with KEY_BACKGROUND_COLOR or KEY_BACKGROUND_PAINT.\r
  30  * \r
  31  * @see Hints#KEY_BACKGROUND_COLOR\r
  32  * @see Hints#KEY_BACKGROUND_PAINT\r
  33  * @author Toni Kalajainen\r
  34  */\r
  35 public class BackgroundPainter extends AbstractCanvasParticipant {\r
  36 \r
  37     protected BackgroundNode node = null;\r
  38 \r
  39     @HintListener(Class=Hints.class, Field="KEY_BACKGROUND_COLOR")\r
  40     public void colorChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {\r
  41         if (node != null) {\r
  42             Color c = getHint(Hints.KEY_BACKGROUND_COLOR);\r
  43             node.setColor(c);\r
  44             setDirty();\r
  45         }\r
  46     }\r
  47 \r
  48     @HintListener(Class=Hints.class, Field="KEY_BACKGROUND_PAINT")\r
  49     public void paintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {\r
  50         if (node != null) {\r
  51             Paint p = getHint(Hints.KEY_BACKGROUND_PAINT);\r
  52             node.setPaint(p);\r
  53             setDirty();\r
  54         }\r
  55     }\r
  56 \r
  57     @SGInit(designation = SGDesignation.CONTROL)\r
  58     public void initSG(G2DParentNode parent) {\r
  59         node = parent.addNode("background", BackgroundNode.class);\r
  60         node.setZIndex(Integer.MIN_VALUE / 2);\r
  61 \r
  62         Color c = getHint(Hints.KEY_BACKGROUND_COLOR);\r
  63         Paint p = getHint(Hints.KEY_BACKGROUND_PAINT);\r
  64         node.setColor(c);\r
  65         node.setPaint(p);\r
  66     }\r
  67 \r
  68     @SGCleanup\r
  69     public void cleanupSG() {\r
  70         if (node != null) {\r
  71             node.remove();\r
  72             node = null;\r
  73         }\r
  74     }\r
  75 \r
  76 }