1 /*******************************************************************************
\r
2 * Copyright (c) 2007, 2012 Association for Decentralized Information Management
\r
3 * in Industry THTH ry.
\r
4 * All rights reserved. This program and the accompanying materials
\r
5 * are made available under the terms of the Eclipse Public License v1.0
\r
6 * which accompanies this distribution, and is available at
\r
7 * http://www.eclipse.org/legal/epl-v10.html
\r
10 * VTT Technical Research Centre of Finland - initial API and implementation
\r
11 *******************************************************************************/
\r
12 package org.simantics.browsing.ui.swt.widgets.impl;
\r
14 import java.util.HashMap;
\r
15 import java.util.List;
\r
16 import java.util.Map;
\r
17 import java.util.concurrent.CopyOnWriteArrayList;
\r
19 import org.simantics.db.ReadGraph;
\r
20 import org.simantics.db.common.request.ParametrizedPrimitiveRead;
\r
21 import org.simantics.db.exception.DatabaseException;
\r
22 import org.simantics.db.management.ISessionContext;
\r
23 import org.simantics.db.procedure.Listener;
\r
25 public class WidgetSupportImpl implements WidgetSupport {
\r
27 final protected CopyOnWriteArrayList<Widget> widgets = new CopyOnWriteArrayList<Widget>();
\r
28 final protected Map<String, Object> parameters = new HashMap<String, Object>();
\r
29 protected Object lastInput = NO_INPUT;
\r
30 protected ISessionContext lastContext = null;
\r
31 private boolean finished = false;
\r
33 final protected List<Listener<?>> listeners = new CopyOnWriteArrayList<Listener<?>>();
\r
36 public synchronized void register(Widget widget) {
\r
37 widgets.add(widget);
\r
41 public void update(Widget widget) {
\r
42 if(lastContext != null && lastInput != NO_INPUT) widget.setInput(lastContext, lastInput);
\r
46 public void update() {
\r
47 for(Widget widget : widgets) update(widget);
\r
51 public void finish() {
\r
53 //for(Widget widget : widgets) update(widget);
\r
56 @SuppressWarnings("unchecked")
\r
58 public <T> T getInput() {
\r
59 return (T) lastInput;
\r
62 public void fireInput(ISessionContext context, Object input) {
\r
65 lastContext = context;
\r
67 for(Widget widget : widgets) {
\r
68 widget.setInput(context, input);
\r
69 for (Listener listener : listeners)
\r
70 listener.execute(input);
\r
75 @SuppressWarnings("unchecked")
\r
77 public <T> T getParameter(String key) {
\r
78 return (T) parameters.get(key);
\r
82 public void setParameter(String key, Object value) {
\r
83 parameters.put(key, value);
\r
87 public <T> T getInput(ReadGraph graph) throws DatabaseException {
\r
88 return graph.sync(new ParametrizedPrimitiveRead<WidgetSupport, T>(this) {
\r
90 Listener<T> procedure;
\r
92 @SuppressWarnings("unchecked")
\r
94 public void register(ReadGraph graph, Listener<T> procedure) {
\r
95 synchronized (listeners) {
\r
96 if(listeners.contains(procedure))
\r
98 this.procedure = procedure;
\r
99 listeners.add(procedure);
\r
100 procedure.execute((T)lastInput);
\r
105 public void unregistered() {
\r
106 synchronized (listeners) {
\r
107 listeners.remove(procedure);
\r