Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.swt / src / org / simantics / browsing / ui / swt / widgets / impl / WidgetSupportImpl.java

diff --git a/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/WidgetSupportImpl.java b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/WidgetSupportImpl.java
new file mode 100644 (file)
index 0000000..e6f14e1
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/WidgetSupportImpl.java
@@ -0,0 +1,115 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2012 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.swt.widgets.impl;\r
+\r
+import java.util.HashMap;\r
+import java.util.List;\r
+import java.util.Map;\r
+import java.util.concurrent.CopyOnWriteArrayList;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.common.request.ParametrizedPrimitiveRead;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.management.ISessionContext;\r
+import org.simantics.db.procedure.Listener;\r
+\r
+public class WidgetSupportImpl implements WidgetSupport {\r
+\r
+       final protected CopyOnWriteArrayList<Widget> widgets = new CopyOnWriteArrayList<Widget>();\r
+       final protected Map<String, Object> parameters = new HashMap<String, Object>();\r
+       protected Object lastInput = NO_INPUT;\r
+       protected ISessionContext lastContext = null;\r
+       private boolean finished = false;\r
+\r
+       final protected List<Listener<?>> listeners = new CopyOnWriteArrayList<Listener<?>>();\r
+       \r
+       @Override\r
+       public synchronized void register(Widget widget) {\r
+               widgets.add(widget);\r
+       }\r
+       \r
+       @Override\r
+       public void update(Widget widget) {\r
+               if(lastContext != null && lastInput != NO_INPUT) widget.setInput(lastContext, lastInput);\r
+       }\r
+\r
+       @Override\r
+       public void update() {\r
+               for(Widget widget : widgets) update(widget);\r
+       }\r
+       \r
+       @Override\r
+       public void finish() {\r
+               finished = true;\r
+               //for(Widget widget : widgets) update(widget);\r
+       }\r
+       \r
+       @SuppressWarnings("unchecked")\r
+       @Override\r
+       public <T> T getInput() {\r
+               return (T) lastInput;\r
+       }\r
+       \r
+       public void fireInput(ISessionContext context, Object input) {\r
+               \r
+               lastInput = input;\r
+               lastContext = context;\r
+               \r
+               for(Widget widget : widgets) {\r
+                       widget.setInput(context, input);\r
+                       for (Listener listener : listeners)\r
+                               listener.execute(input);\r
+               }\r
+               \r
+       }\r
+       \r
+       @SuppressWarnings("unchecked")\r
+       @Override\r
+       public <T> T getParameter(String key) {\r
+               return (T) parameters.get(key);\r
+       }\r
+       \r
+       @Override\r
+       public void setParameter(String key, Object value) {\r
+               parameters.put(key, value);\r
+       }\r
+\r
+       @Override\r
+       public <T> T getInput(ReadGraph graph) throws DatabaseException {\r
+               return graph.sync(new ParametrizedPrimitiveRead<WidgetSupport, T>(this) {\r
+\r
+                       Listener<T> procedure;\r
+\r
+                       @SuppressWarnings("unchecked")\r
+                       @Override\r
+                       public void register(ReadGraph graph, Listener<T> procedure) {\r
+                               synchronized (listeners) {\r
+                                       if(listeners.contains(procedure))\r
+                                               return;\r
+                                       this.procedure = procedure;\r
+                                       listeners.add(procedure);\r
+                                       procedure.execute((T)lastInput);\r
+                               }\r
+                       }\r
+\r
+                       @Override\r
+                       public void unregistered() {\r
+                               synchronized (listeners) {\r
+                                       listeners.remove(procedure);\r
+                                       procedure = null;\r
+                               }\r
+                       }\r
+\r
+               });\r
+       }\r
+       \r
+}\r