bundles/org.simantics.structural.ui/src/org/simantics/structural/ui/menuContributions/ShowAllChildrenContribution.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * 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 implementatio\r
  11  *******************************************************************************/\r
  12 package org.simantics.structural.ui.menuContributions;\r
  13 \r
  14 import java.util.List;\r
  15 \r
  16 import org.eclipse.jface.action.Action;\r
  17 import org.eclipse.jface.action.ActionContributionItem;\r
  18 import org.eclipse.jface.action.IContributionItem;\r
  19 import org.eclipse.jface.viewers.ISelection;\r
  20 import org.eclipse.jface.viewers.ISelectionProvider;\r
  21 import org.eclipse.ui.IWorkbenchPart;\r
  22 import org.eclipse.ui.actions.CompoundContributionItem;\r
  23 import org.simantics.browsing.ui.BuiltinKeys;\r
  24 import org.simantics.browsing.ui.GraphExplorer;\r
  25 import org.simantics.browsing.ui.NodeContext;\r
  26 import org.simantics.browsing.ui.common.processors.ShowMaxChildrenProcessor;\r
  27 import org.simantics.browsing.ui.content.PrunedChildrenResult;\r
  28 import org.simantics.db.layer0.SelectionHints;\r
  29 import org.simantics.structural.ui.Activator;\r
  30 import org.simantics.utils.ui.ISelectionUtils;\r
  31 import org.simantics.utils.ui.workbench.WorkbenchUtils;\r
  32 \r
  33 /**\r
  34  * @author Tuukka Lehtonen\r
  35  */\r
  36 public class ShowAllChildrenContribution extends CompoundContributionItem {\r
  37 \r
  38     static IContributionItem[] NONE = {};\r
  39 \r
  40     @Override\r
  41     protected IContributionItem[] getContributionItems() {\r
  42         IWorkbenchPart part = WorkbenchUtils.getActiveWorkbenchPart();\r
  43         if (part == null)\r
  44             return NONE;\r
  45 \r
  46         GraphExplorer explorer = (GraphExplorer) part.getAdapter(GraphExplorer.class);\r
  47         if (explorer == null)\r
  48             return NONE;\r
  49 \r
  50         ISelectionProvider sp = (ISelectionProvider) explorer.getAdapter(ISelectionProvider.class);\r
  51         if (sp == null)\r
  52             return NONE;\r
  53 \r
  54         ISelection s = sp.getSelection();\r
  55         List<NodeContext> nodes = ISelectionUtils.getPossibleKeys(s, SelectionHints.KEY_MAIN, NodeContext.class);\r
  56         if (nodes.isEmpty())\r
  57             return NONE;\r
  58 \r
  59         boolean allTruncated = true;\r
  60         for (NodeContext node : nodes) {\r
  61             PrunedChildrenResult prunedChildren = explorer.query(node, BuiltinKeys.PRUNED_CHILDREN);\r
  62             NodeContext[] finalChildren = explorer.query(node, BuiltinKeys.FINAL_CHILDREN);\r
  63             if (prunedChildren == null || finalChildren == null\r
  64                     || prunedChildren.getPrunedChildren().length == finalChildren.length) {\r
  65                 allTruncated = false;\r
  66                 break;\r
  67             }\r
  68         }\r
  69         if (!allTruncated)\r
  70             return NONE;\r
  71 \r
  72         ShowMaxChildrenProcessor processor = (ShowMaxChildrenProcessor) explorer.getPrimitiveProcessor(BuiltinKeys.SHOW_MAX_CHILDREN);\r
  73         if (processor == null)\r
  74             return NONE;\r
  75 \r
  76         // Show all children\r
  77         return new IContributionItem[] {\r
  78                 new ActionContributionItem(new ShowAllChildrenAction(processor, nodes))\r
  79         };\r
  80     }\r
  81 \r
  82     static class ShowAllChildrenAction extends Action {\r
  83         private ShowMaxChildrenProcessor processor;\r
  84         private List<NodeContext>        nodes;\r
  85 \r
  86         public ShowAllChildrenAction(ShowMaxChildrenProcessor processor, List<NodeContext> nodes) {\r
  87             super("Show All Children");\r
  88             setImageDescriptor(Activator.SHOW_ALL_CHILDREN_ICON);\r
  89             this.processor = processor;\r
  90             this.nodes = nodes;\r
  91         }\r
  92 \r
  93         @Override\r
  94         public void run() {\r
  95             for (NodeContext node : nodes)\r
  96                 processor.replaceShowMaxChildren(node, Integer.MAX_VALUE);\r
  97         }\r
  98     }\r
  99 \r
 100 }\r