bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/RasterElementClassFactory.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.diagram.adapter;\r
  13 \r
  14 import java.awt.image.BufferedImage;\r
  15 import java.io.ByteArrayInputStream;\r
  16 import java.io.IOException;\r
  17 import java.net.MalformedURLException;\r
  18 \r
  19 import javax.imageio.ImageIO;\r
  20 \r
  21 import org.simantics.databoard.Bindings;\r
  22 import org.simantics.db.AsyncReadGraph;\r
  23 import org.simantics.db.Resource;\r
  24 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
  25 import org.simantics.db.common.procedure.guarded.GuardedAsyncProcedureWrapper;\r
  26 import org.simantics.db.common.request.BinaryAsyncRead;\r
  27 import org.simantics.db.procedure.AsyncProcedure;\r
  28 import org.simantics.diagram.stubs.G2DResource;\r
  29 import org.simantics.diagram.synchronization.SynchronizationHints;\r
  30 import org.simantics.diagram.synchronization.graph.TransformSynchronizer;\r
  31 import org.simantics.g2d.canvas.ICanvasContext;\r
  32 import org.simantics.g2d.diagram.IDiagram;\r
  33 import org.simantics.g2d.element.ElementClass;\r
  34 import org.simantics.g2d.element.ElementHints;\r
  35 import org.simantics.g2d.element.IElement;\r
  36 import org.simantics.g2d.element.handler.impl.DefaultTransform;\r
  37 import org.simantics.g2d.element.handler.impl.SimpleElementLayers;\r
  38 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;\r
  39 import org.simantics.g2d.element.handler.impl.StaticSymbolImageInitializer;\r
  40 import org.simantics.g2d.element.handler.impl.StaticSymbolImpl;\r
  41 import org.simantics.g2d.element.handler.impl.TextImpl;\r
  42 import org.simantics.g2d.elementclass.ImageClass.ImageElementHandler;\r
  43 import org.simantics.g2d.image.DefaultImages;\r
  44 import org.simantics.g2d.image.impl.AWTImage;\r
  45 import org.simantics.utils.datastructures.cache.ProvisionException;\r
  46 import org.simantics.utils.ui.ErrorLogger;\r
  47 \r
  48 /**\r
  49  * An {@link ElementFactory} for DIA.SVGElement instances.\r
  50  * \r
  51  * <p>\r
  52  * Loads element layers, transform and SVG document.\r
  53  * \r
  54  * @author Tuukka Lehtonen\r
  55  */\r
  56 public class RasterElementClassFactory extends ElementFactoryAdapter {\r
  57 \r
  58     public static final ElementFactory INSTANCE = new RasterElementClassFactory();\r
  59 \r
  60     private static final StaticSymbolImpl STATIC_SYMBOL = new StaticSymbolImpl(DefaultImages.HOURGLASS.get());\r
  61 \r
  62     static class ClassRequest extends BinaryAsyncRead<Resource, ICanvasContext, ElementClass> {\r
  63 \r
  64         final private IDiagram diagram;\r
  65 \r
  66         public ClassRequest(Resource elementType, ICanvasContext canvas, IDiagram diagram) {\r
  67             super(elementType, canvas);\r
  68             this.diagram = diagram;\r
  69         }\r
  70 \r
  71         @Override\r
  72         public void perform(AsyncReadGraph graph, AsyncProcedure<ElementClass> procedure) {\r
  73             createClass(graph, parameter2, diagram, parameter, procedure);\r
  74         }\r
  75 \r
  76     }\r
  77 \r
  78     @Override\r
  79     public void create(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram,\r
  80             final Resource elementType, final AsyncProcedure<ElementClass> procedure) {\r
  81 \r
  82         graph.asyncRequest(new ClassRequest(elementType, canvas, diagram), new TransientCacheAsyncListener<ElementClass>() {\r
  83 \r
  84             @Override\r
  85             public void exception(AsyncReadGraph graph, Throwable t) {\r
  86                 t.printStackTrace();\r
  87                 procedure.exception(graph, t);\r
  88             }\r
  89 \r
  90             @Override\r
  91             public void execute(AsyncReadGraph graph, ElementClass result) {\r
  92                 procedure.execute(graph, result);\r
  93             }\r
  94 \r
  95         });\r
  96 \r
  97     }\r
  98 \r
  99     static void createClass(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram,\r
 100             final Resource elementType, final AsyncProcedure<ElementClass> procedure) {\r
 101         String id = "RasterElement: " + elementType.getResourceId();\r
 102         procedure.execute(graph, ElementClass.compile(\r
 103                 TextImpl.INSTANCE,\r
 104                 new StaticObjectAdapter(elementType),\r
 105                 DefaultTransform.INSTANCE,\r
 106                 StaticSymbolImageInitializer.INSTANCE,\r
 107                 STATIC_SYMBOL,\r
 108                 ImageElementHandler.INSTANCE,\r
 109                 SimpleElementLayers.INSTANCE)\r
 110                 .setId(id));\r
 111     }\r
 112 \r
 113     @Override\r
 114     public void load(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram, final Resource element, final IElement e, final AsyncProcedure<IElement> procedure) {\r
 115         e.setHint(SynchronizationHints.HINT_SYNCHRONIZER, TransformSynchronizer.INSTANCE);\r
 116 \r
 117         final GuardedAsyncProcedureWrapper<IElement> guard = new GuardedAsyncProcedureWrapper<IElement>(procedure, 3);\r
 118 \r
 119         loadRaster(graph, diagram, element, e, guard);\r
 120         ElementFactoryUtil.loadLayersForElement(graph, diagram, e, element, guard);\r
 121         ElementFactoryUtil.readTransform(graph, element, e, guard);\r
 122     }\r
 123 \r
 124     private void loadRaster(AsyncReadGraph graph, final IDiagram diagram, final Resource element, final IElement e, final AsyncProcedure<IElement> guard) {\r
 125         G2DResource G2D = graph.getService(G2DResource.class);\r
 126 \r
 127         graph.forPossibleRelatedValue(element, G2D.HasRasterImage, Bindings.BYTE_ARRAY, new AsyncProcedure<byte[]>() {\r
 128             @Override\r
 129             public void exception(AsyncReadGraph graph, Throwable throwable) {\r
 130                 guard.exception(graph, throwable);\r
 131             }\r
 132 \r
 133             @Override\r
 134             public void execute(AsyncReadGraph graph, final byte[] data) {\r
 135                 if (data != null) {\r
 136 \r
 137                     try {\r
 138                         BufferedImage bi = ImageIO.read(new ByteArrayInputStream(data));\r
 139                         e.setHint(ElementHints.KEY_IMAGE, new AWTImage(bi));\r
 140                         guard.execute(graph, e);\r
 141                     } catch (ProvisionException ex) {\r
 142                         ErrorLogger.defaultLogError(ex);\r
 143                         e.setHint(ElementHints.KEY_IMAGE, DefaultImages.SVG.get());\r
 144                         guard.execute(graph, e);\r
 145                     } catch (MalformedURLException e1) {\r
 146                         ErrorLogger.defaultLogError(e1);\r
 147                         e.setHint(ElementHints.KEY_IMAGE, DefaultImages.SVG.get());\r
 148                         guard.execute(graph, e);\r
 149                                         } catch (IOException e1) {\r
 150                         ErrorLogger.defaultLogError(e1);\r
 151                         e.setHint(ElementHints.KEY_IMAGE, DefaultImages.SVG.get());\r
 152                         guard.execute(graph, e);\r
 153                                         }\r
 154                 } else {\r
 155                     e.setHint(ElementHints.KEY_IMAGE, DefaultImages.UNKNOWN.get());\r
 156                     guard.execute(graph, e);\r
 157                 }\r
 158             }\r
 159         });\r
 160     }\r
 161 \r
 162 }