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