--- /dev/null
+/*******************************************************************************\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