bundles/org.simantics.g2d/src/org/simantics/g2d/participant/SubCanvas.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 org.simantics.g2d.canvas.Hints;\r
  15 import org.simantics.g2d.canvas.ICanvasContext;\r
  16 import org.simantics.g2d.canvas.IMouseCaptureContext;\r
  17 import org.simantics.g2d.canvas.IMouseCursorContext;\r
  18 import org.simantics.g2d.canvas.IContentContext;\r
  19 import org.simantics.g2d.canvas.IContentContext.IContentListener;\r
  20 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;\r
  21 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;\r
  22 \r
  23 /**\r
  24  * Subcanvas encapsulates a canvas (another) in one participant.\r
  25  * \r
  26  * \r
  27  * @author Toni Kalajainen\r
  28  */\r
  29 public class SubCanvas extends AbstractCanvasParticipant {\r
  30 \r
  31         @Dependency TransformUtil util;\r
  32 \r
  33         private boolean enabled = true;\r
  34         private ICanvasContext superCtx = null;\r
  35         \r
  36         /** Sub-Canvas */\r
  37         private ICanvasContext sub;\r
  38         int eventPriority, paintPriority, hintPriority;\r
  39         //IHintContext subHintStack;\r
  40         IMouseCursorContext origSubCursorCtx;\r
  41         IMouseCaptureContext origSubCaptureCtx;\r
  42         \r
  43         // Subcanvas has become dirty, make super canvas also dirty\r
  44         IContentListener paintableCtxListener = new IContentListener() {\r
  45 \r
  46                 @Override\r
  47                 public void onDirty(IContentContext sender) {\r
  48                         if (superCtx==null) return;\r
  49                         superCtx.getContentContext().setDirty();\r
  50                 }\r
  51         };\r
  52         \r
  53         public SubCanvas(ICanvasContext subCanvas, int eventPriority, int paintPriority, int hintPriority) {\r
  54                 assert(subCanvas!=null);\r
  55                 this.sub = subCanvas;\r
  56                 this.eventPriority = eventPriority;\r
  57                 this.paintPriority = paintPriority;\r
  58                 this.hintPriority = hintPriority;\r
  59                 //subHintStack = sub.getHintStack().createStackRead(sub.getDefaultHintContext());\r
  60                 \r
  61 //              subCanvas.getMouseCaptureContext().addMouseCaptureListener(new IMouseCaptureListener() {\r
  62 //                      @Override\r
  63 //                      public void onMouseCaptured(IMouseCaptureContext sender, int mouseId) {\r
  64 //                              if (superCtx==null) return;\r
  65 //                              superCtx.getMouseCaptureContext().\r
  66 //                      }\r
  67 //                      @Override\r
  68 //                      public void onMouseReleased(IMouseCaptureContext sender, int mouseId) {\r
  69 //                      }});\r
  70         }\r
  71         \r
  72         @Override\r
  73         public void addedToContext(ICanvasContext ctx) {\r
  74                 super.addedToContext(ctx);\r
  75                 superCtx = ctx;\r
  76                 if (enabled) enable();\r
  77         }\r
  78         \r
  79         @Override\r
  80         public void removedFromContext(ICanvasContext ctx) {\r
  81                 assert(superCtx==ctx);\r
  82                 if (enabled) disable();\r
  83                 superCtx = null;\r
  84                 super.removedFromContext(ctx);\r
  85         }\r
  86         \r
  87         public void setEnabled(boolean enabled)\r
  88         {\r
  89                 if (this.enabled == enabled) return;\r
  90                 if (enabled) enable(); else disable();\r
  91         }\r
  92         \r
  93         void enable() {\r
  94                 superCtx.getEventHandlerStack().add(sub.getEventHandlerStack(), eventPriority);\r
  95 //              superCtx.getPainterStack().add(sub.getPainterStack(), paintPriority);\r
  96                 //superCtx.getHintStack().addHintContext(subHintStack, hintPriority);\r
  97                 sub.getContentContext().addPaintableContextListener(paintableCtxListener);\r
  98                 origSubCursorCtx = sub.getMouseCursorContext();\r
  99                 sub.setMouseCursorContext(getContext().getMouseCursorContext());\r
 100                 origSubCaptureCtx = sub.getMouseCaptureContext();\r
 101                 sub.setMouseCaptureContext(getContext().getMouseCaptureContext());\r
 102                 assert(sub.getDefaultHintContext().getHint(Hints.KEY_SUPER_CANVAS)==null);\r
 103                 //sub.getDefaultHintContext().setHint(Hints.KEY_SUPER_CANVAS, ctx);\r
 104                 this.enabled = true;\r
 105         }\r
 106         \r
 107         void disable() {\r
 108                 sub.getDefaultHintContext().removeHint(Hints.KEY_SUPER_CANVAS);\r
 109                 sub.setMouseCaptureContext(origSubCaptureCtx);          \r
 110                 sub.setMouseCursorContext(origSubCursorCtx);\r
 111                 sub.getContentContext().removePaintableContextListener(paintableCtxListener);\r
 112                 //ctx.getHintStack().removeHintContext(subHintStack);\r
 113 //              superCtx.getPainterStack().remove(sub.getPainterStack());\r
 114                 superCtx.getEventHandlerStack().remove(sub.getEventHandlerStack());\r
 115                 this.enabled = false;\r
 116         }\r
 117 \r
 118 }\r