--- /dev/null
+package org.simantics.modeling.ui;\r
+\r
+import java.util.Arrays;\r
+import java.util.Comparator;\r
+\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.GraphExplorer;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.PrimitiveQueryProcessor;\r
+import org.simantics.browsing.ui.common.processors.IsExpandedProcessor;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.SelectionHints;\r
+import org.simantics.ui.DoubleClickEvent;\r
+import org.simantics.ui.IDoubleClickAction;\r
+import org.simantics.ui.workbench.action.IWorkbenchActionHints;\r
+import org.simantics.ui.workbench.editor.EditorAdapter;\r
+import org.simantics.ui.workbench.editor.EditorRegistry;\r
+import org.simantics.utils.ui.ISelectionUtils;\r
+import org.simantics.utils.ui.action.IPriorityAction;\r
+import org.simantics.utils.ui.action.PriorityAction;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class ExpandNodeHandler implements IDoubleClickAction {\r
+\r
+ @Override\r
+ public void doubleClickEvent(DoubleClickEvent e) throws DatabaseException {\r
+ ReadGraph g = e.getGraph();\r
+ final NodeContext node = ISelectionUtils.getSinglePossibleKey(e.getResource(), SelectionHints.KEY_MAIN, NodeContext.class);\r
+ if (node == null)\r
+ return;\r
+\r
+ Object widget = e.getHintContext().getHint(IWorkbenchActionHints.KEY_WIDGET);\r
+ if (!(widget instanceof GraphExplorer))\r
+ return;\r
+ final GraphExplorer explorer = (GraphExplorer) widget;\r
+\r
+ EditorAdapter[] editorAdapters = EditorRegistry.getInstance().getAdaptersFor(g, node);\r
+\r
+ Arrays.sort(editorAdapters, new Comparator<EditorAdapter>() {\r
+ @Override\r
+ public int compare(EditorAdapter o1, EditorAdapter o2) {\r
+ // Sort in descending priority order\r
+ return -(o1.getPriority() - o2.getPriority());\r
+ }\r
+ });\r
+\r
+ // If editor selection is unanimous, use the editor. Otherwise just expand/collapse the clicked node.\r
+ if (editorAdapters.length == 0) {\r
+ e.add(expandAction(explorer, node));\r
+ e.consume();\r
+ } else if (editorAdapters.length > 1 && editorAdapters[0].getPriority() == editorAdapters[1].getPriority()) {\r
+ e.add(expandAction(explorer, node));\r
+ e.consume();\r
+ }\r
+ }\r
+\r
+ private IPriorityAction expandAction(final GraphExplorer explorer, final NodeContext node) {\r
+ return new PriorityAction(100) {\r
+ @Override\r
+ public void run() {\r
+ PrimitiveQueryProcessor<?> pqp = explorer.getPrimitiveProcessor(BuiltinKeys.IS_EXPANDED);\r
+ if (pqp instanceof IsExpandedProcessor) {\r
+ IsExpandedProcessor iep = (IsExpandedProcessor) pqp;\r
+ boolean expanded = iep.getExpanded(node);\r
+ iep.replaceExpanded(node, !expanded);\r
+ }\r
+ }\r
+ };\r
+ }\r
+\r
+}\r