bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/processors/UserSelectedViewpointFactoryQueryProcessor.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.common.processors;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.HashMap;\r
  16 \r
  17 import org.simantics.browsing.ui.BuiltinKeys;\r
  18 import org.simantics.browsing.ui.NodeContext;\r
  19 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  20 import org.simantics.browsing.ui.BuiltinKeys.SelectedViewpointFactoryKey;\r
  21 import org.simantics.browsing.ui.NodeContext.PrimitiveQueryKey;\r
  22 import org.simantics.browsing.ui.content.ViewpointFactory;\r
  23 import org.simantics.utils.datastructures.Pair;\r
  24 \r
  25 public class UserSelectedViewpointFactoryQueryProcessor extends AbstractPrimitiveQueryProcessor<ViewpointFactory> {\r
  26 \r
  27     HashMap<NodeContext, ViewpointFactory> selections = new HashMap<NodeContext, ViewpointFactory>();\r
  28     HashMap<NodeContext, Pair<PrimitiveQueryKey<?>, PrimitiveQueryUpdater>> updaters = new HashMap<NodeContext, Pair<PrimitiveQueryKey<?>, PrimitiveQueryUpdater>>();\r
  29 \r
  30     @Override\r
  31     public String toString() {\r
  32         return "UserSelectedViewpointFactoryProcessor";\r
  33     }\r
  34 \r
  35     @Override\r
  36     public Object getIdentifier() {\r
  37         return BuiltinKeys.SelectedViewpointFactoryKey.class;\r
  38     }\r
  39 \r
  40     @Override\r
  41     public ViewpointFactory query(PrimitiveQueryUpdater updater, NodeContext context,\r
  42             PrimitiveQueryKey<ViewpointFactory> key) {\r
  43 \r
  44         updaters.put(context, new Pair<PrimitiveQueryKey<?>, PrimitiveQueryUpdater>(key, updater));\r
  45         ViewpointFactory result = selections.get(context);\r
  46         if (result != null)\r
  47             return result;\r
  48 \r
  49         SelectedViewpointFactoryKey k = (SelectedViewpointFactoryKey) key;\r
  50         Collection<ViewpointFactory> factories = k.getParameter(0);\r
  51 \r
  52         if (factories.isEmpty())\r
  53             return null;\r
  54 \r
  55         return factories.iterator().next();\r
  56     }\r
  57 \r
  58     public ViewpointFactory getSelection(NodeContext context) {\r
  59         return selections.get(context);\r
  60     }\r
  61 \r
  62     /**\r
  63      * Invoked by the user interfaces for selecting viewpoints.\r
  64      * \r
  65      * @param context\r
  66      * @param factory\r
  67      */\r
  68     @SuppressWarnings("unchecked")\r
  69     public void select(NodeContext context, ViewpointFactory factory) {\r
  70         selections.put(context, factory);\r
  71         Pair<PrimitiveQueryKey<?>, PrimitiveQueryUpdater> p = updaters.get(context);\r
  72         if (p.second == null)\r
  73             throw new IllegalArgumentException("context not found in cache");\r
  74         p.second.scheduleReplace(context, (PrimitiveQueryKey<ViewpointFactory>) p.first, factory);\r
  75     }\r
  76 \r
  77 }\r