bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/ExpandNodeHandler.java

   1 package org.simantics.modeling.ui;\r
   2 \r
   3 import java.util.Arrays;\r
   4 import java.util.Comparator;\r
   5 \r
   6 import org.simantics.browsing.ui.BuiltinKeys;\r
   7 import org.simantics.browsing.ui.GraphExplorer;\r
   8 import org.simantics.browsing.ui.NodeContext;\r
   9 import org.simantics.browsing.ui.PrimitiveQueryProcessor;\r
  10 import org.simantics.browsing.ui.common.processors.IsExpandedProcessor;\r
  11 import org.simantics.db.ReadGraph;\r
  12 import org.simantics.db.exception.DatabaseException;\r
  13 import org.simantics.db.layer0.SelectionHints;\r
  14 import org.simantics.ui.DoubleClickEvent;\r
  15 import org.simantics.ui.IDoubleClickAction;\r
  16 import org.simantics.ui.workbench.action.IWorkbenchActionHints;\r
  17 import org.simantics.ui.workbench.editor.EditorAdapter;\r
  18 import org.simantics.ui.workbench.editor.EditorRegistry;\r
  19 import org.simantics.utils.ui.ISelectionUtils;\r
  20 import org.simantics.utils.ui.action.IPriorityAction;\r
  21 import org.simantics.utils.ui.action.PriorityAction;\r
  22 \r
  23 /**\r
  24  * @author Tuukka Lehtonen\r
  25  */\r
  26 public class ExpandNodeHandler implements IDoubleClickAction {\r
  27 \r
  28     @Override\r
  29     public void doubleClickEvent(DoubleClickEvent e) throws DatabaseException {\r
  30         ReadGraph g = e.getGraph();\r
  31         final NodeContext node = ISelectionUtils.getSinglePossibleKey(e.getResource(), SelectionHints.KEY_MAIN, NodeContext.class);\r
  32         if (node == null)\r
  33             return;\r
  34 \r
  35         Object widget = e.getHintContext().getHint(IWorkbenchActionHints.KEY_WIDGET);\r
  36         if (!(widget instanceof GraphExplorer))\r
  37             return;\r
  38         final GraphExplorer explorer = (GraphExplorer) widget;\r
  39 \r
  40         EditorAdapter[] editorAdapters = EditorRegistry.getInstance().getAdaptersFor(g, node);\r
  41 \r
  42         Arrays.sort(editorAdapters, new Comparator<EditorAdapter>() {\r
  43             @Override\r
  44             public int compare(EditorAdapter o1, EditorAdapter o2) {\r
  45                 // Sort in descending priority order\r
  46                 return -(o1.getPriority() - o2.getPriority());\r
  47             }\r
  48         });\r
  49 \r
  50         // If editor selection is unanimous, use the editor. Otherwise just expand/collapse the clicked node.\r
  51         if (editorAdapters.length == 0) {\r
  52             e.add(expandAction(explorer, node));\r
  53             e.consume();\r
  54         } else if (editorAdapters.length > 1 && editorAdapters[0].getPriority() == editorAdapters[1].getPriority()) {\r
  55             e.add(expandAction(explorer, node));\r
  56             e.consume();\r
  57         }\r
  58     }\r
  59 \r
  60     private IPriorityAction expandAction(final GraphExplorer explorer, final NodeContext node) {\r
  61         return new PriorityAction(100) {\r
  62             @Override\r
  63             public void run() {\r
  64                 PrimitiveQueryProcessor<?> pqp = explorer.getPrimitiveProcessor(BuiltinKeys.IS_EXPANDED);\r
  65                 if (pqp instanceof IsExpandedProcessor) {\r
  66                     IsExpandedProcessor iep = (IsExpandedProcessor) pqp;\r
  67                     boolean expanded = iep.getExpanded(node);\r
  68                     iep.replaceExpanded(node, !expanded);\r
  69                 }\r
  70             }\r
  71         };\r
  72     }\r
  73 \r
  74 }\r