bundles/org.simantics.g2d/src/org/simantics/g2d/example/chassis/ViewPartExample.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.g2d.example.chassis;
  13
  14 import org.eclipse.swt.widgets.Composite;
  15 import org.eclipse.ui.part.ViewPart;
  16 import org.simantics.g2d.canvas.ICanvasContext;
  17 import org.simantics.g2d.canvas.impl.CanvasContext;
  18 import org.simantics.g2d.chassis.ICanvasChassis;
  19 import org.simantics.g2d.chassis.IChassisListener;
  20 import org.simantics.g2d.chassis.SWTChassis;
  21 import org.simantics.g2d.example.TestCanvas;
  22 import org.simantics.utils.threads.AWTThread;
  23 import org.simantics.utils.threads.IThreadWorkQueue;
  24 import org.simantics.utils.threads.ThreadUtils;
  25
  26 public class ViewPartExample extends ViewPart {
  27     SWTChassis c;
  28
  29     @Override
  30     public void createPartControl(Composite parent) {
  31         c = new SWTChassis(parent, 0);
  32         c.syncPopulate();
  33
  34         IThreadWorkQueue thread = AWTThread.getThreadAccess();
  35         CanvasContext canvasContext = TestCanvas.createTestCanvas(thread);
  36
  37         c.setCanvasContext(canvasContext);
  38
  39         c.addChassisListener(new IChassisListener() {
  40             @Override
  41             public void chassisClosed(ICanvasChassis sender) {
  42                 // Prevent deadlock while disposing which using syncExec would result in.
  43                 ThreadUtils.asyncExec(c.getCanvasContext().getThreadAccess(), new Runnable() {
  44                     @Override
  45                     public void run() {
  46                         ICanvasContext ctx = c.getCanvasContext();
  47                         c.getAWTComponent().setCanvasContext(null);
  48                         ctx.dispose();
  49                     }
  50                 });
  51             }
  52         });
  53     }
  54
  55     @Override
  56     public void setFocus() {
  57         c.setFocus();
  58     }
  59
  60 }