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