Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.graph.impl / src / org / simantics / browsing / ui / graph / impl / contribution / LabelerContributionImpl.java

diff --git a/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/LabelerContributionImpl.java b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/LabelerContributionImpl.java
new file mode 100644 (file)
index 0000000..1ce487c
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/LabelerContributionImpl.java
@@ -0,0 +1,73 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.graph.impl.contribution;\r
+\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
+import org.simantics.browsing.ui.BuiltinKeys.LabelerKey;\r
+import org.simantics.browsing.ui.common.labelers.LabelerContent;\r
+import org.simantics.db.AsyncReadGraph;\r
+import org.simantics.db.procedure.Listener;\r
+import org.simantics.db.procedure.Procedure;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+/**\r
+ * Implement {@link #children(AsyncReadGraph)} and {@link #hasChildren(AsyncReadGraph)}.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+abstract public class LabelerContributionImpl extends FinalLabelerContributionImpl {\r
+\r
+       public LabelerContributionImpl(PrimitiveQueryUpdater updater,\r
+                       NodeContext context, LabelerKey key) {\r
+               super(updater, context, key);\r
+       }\r
+\r
+       @Override\r
+       protected Procedure<LabelerContent> createProcedure() {\r
+               \r
+       return new Listener<LabelerContent>() {\r
+               \r
+               boolean executed = false;\r
+               boolean disposed = false;\r
+\r
+            @Override\r
+            public void execute(LabelerContent result) {\r
+                replaceResult(result);\r
+                executed = true;\r
+            }\r
+\r
+            @Override\r
+            public boolean isDisposed() {\r
+               \r
+               if(disposed) return true;\r
+               \r
+               if((updater.isDisposed() || !updater.isShown(context)) && executed) {\r
+                       setContent(LabelerContent.NO_CONTENT);\r
+                       disposed = true;\r
+                       return true;\r
+               } else {\r
+                       return false;\r
+               }\r
+               \r
+            }\r
+\r
+            @Override\r
+            public void exception(Throwable t) {\r
+                ErrorLogger.defaultLogError("LazyContributionImpl.childQuery failed, see exception for details.", t);\r
+            }\r
+\r
+        };\r
+               \r
+       }\r
+\r
+}\r