bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/ImagerContributionImpl.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.browsing.ui.graph.impl.contribution;
  13
  14 import java.util.Map;
  15
  16 import org.eclipse.jface.resource.ImageDescriptor;
  17 import org.simantics.browsing.ui.BuiltinKeys.ImagerKey;
  18 import org.simantics.browsing.ui.NodeContext;
  19 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  20 import org.simantics.db.AsyncReadGraph;
  21 import org.simantics.db.procedure.Listener;
  22 import org.simantics.db.procedure.Procedure;
  23 import org.simantics.utils.ui.ErrorLogger;
  24
  25 /**
  26  * Implement {@link #children(AsyncReadGraph)} and {@link #hasChildren(AsyncReadGraph)}.
  27  *
  28  * @author Tuukka Lehtonen
  29  */
  30 @SuppressWarnings("unchecked")
  31 public abstract class ImagerContributionImpl extends FinalImagerContributionImpl {
  32
  33     public ImagerContributionImpl(PrimitiveQueryUpdater updater,
  34             NodeContext context, ImagerKey key) {
  35         super(updater, context, key);
  36     }
  37
  38     @Override
  39     protected Procedure<Map<String, ImageDescriptor>> createProcedure() {
  40
  41         return new Listener<Map<String, ImageDescriptor>>() {
  42
  43                 boolean executed = false;
  44                 boolean disposed = false;
  45
  46             @Override
  47             public void execute(Map<String, ImageDescriptor> result) {
  48                 replaceResult(result);
  49                 executed = true;
  50             }
  51
  52             @Override
  53             public boolean isDisposed() {
  54
  55                 if(disposed) return true;
  56
  57                 if((updater.isDisposed() || !updater.isShown(context)) && executed) {
  58                         content = null;
  59                         disposed = true;
  60                         return true;
  61                 } else {
  62                         return false;
  63                 }
  64
  65             }
  66
  67             @Override
  68             public void exception(Throwable t) {
  69                 ErrorLogger.defaultLogError("ImagerContributionImpl.imagerQuery failed, see exception for details.", t);
  70             }
  71
  72         };
  73
  74     }
  75
  76 }