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

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