Set browser title with database and table titles.
[online-glom:gwt-glom.git] / src / main / java / org / glom / web / client / activity / TableSelectionActivity.java
1 /*
2  * Copyright (C) 2011 Openismus GmbH
3  *
4  * This file is part of GWT-Glom.
5  *
6  * GWT-Glom is free software: you can redistribute it and/or modify it
7  * under the terms of the GNU Lesser General Public License as published by the
8  * Free Software Foundation, either version 3 of the License, or (at your
9  * option) any later version.
10  *
11  * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
14  * for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public License
17  * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 package org.glom.web.client.activity;
21
22 import org.glom.web.client.ClientFactory;
23 import org.glom.web.client.OnlineGlomServiceAsync;
24 import org.glom.web.client.event.TableChangeEvent;
25 import org.glom.web.client.place.DetailsPlace;
26 import org.glom.web.client.place.HasSelectableTablePlace;
27 import org.glom.web.client.place.ListPlace;
28 import org.glom.web.client.ui.TableSelectionView;
29 import org.glom.web.shared.GlomDocument;
30
31 import com.google.gwt.activity.shared.AbstractActivity;
32 import com.google.gwt.event.dom.client.ChangeEvent;
33 import com.google.gwt.event.dom.client.ChangeHandler;
34 import com.google.gwt.event.dom.client.HasChangeHandlers;
35 import com.google.gwt.event.shared.EventBus;
36 import com.google.gwt.event.shared.HandlerRegistration;
37 import com.google.gwt.place.shared.Place;
38 import com.google.gwt.user.client.Window;
39 import com.google.gwt.user.client.rpc.AsyncCallback;
40 import com.google.gwt.user.client.ui.AcceptsOneWidget;
41 import com.google.gwt.user.client.ui.ListBox;
42
43 /**
44  * @author Ben Konrath <ben@bagu.org>
45  * 
46  */
47 public class TableSelectionActivity extends AbstractActivity implements TableSelectionView.Presenter {
48         private final ClientFactory clientFactory;
49         private String documentID;
50         private String documentTitle;
51         private String tableName;
52         private HandlerRegistration changeHandlerRegistration = null;
53
54         // This activity isn't properly configured until the List or Details Place is set with the appropriate methods
55         public TableSelectionActivity(ClientFactory clientFactory) {
56                 this.clientFactory = clientFactory;
57         }
58
59         /**
60          * Invoked by the ActivityManager to start a new Activity
61          */
62         @Override
63         public void start(AcceptsOneWidget containerWidget, final EventBus eventBus) {
64
65                 final TableSelectionView tableSelectionView = clientFactory.getTableSelectionView();
66                 tableSelectionView.setPresenter(this);
67
68                 HasChangeHandlers tableSelector = tableSelectionView.getTableSelector();
69
70                 changeHandlerRegistration = tableSelector.addChangeHandler(new ChangeHandler() {
71                         @Override
72                         public void onChange(ChangeEvent event) {
73                                 ListBox listBox = (ListBox) event.getSource();
74                                 int selectedIndex = listBox.getSelectedIndex();
75                                 eventBus.fireEvent(new TableChangeEvent(selectedIndex < 0 ? "" : listBox.getValue(selectedIndex)));
76                                 Window.setTitle(documentTitle + (selectedIndex < 0 ? "" : ": " + listBox.getItemText(selectedIndex)));
77                         }
78                 });
79
80                 // get the table names, table titles and default table index for the current document
81                 AsyncCallback<GlomDocument> callback = new AsyncCallback<GlomDocument>() {
82                         public void onFailure(Throwable caught) {
83                                 // FIXME: need to deal with failure
84                                 System.out.println("AsyncCallback Failed: OnlineGlomService.getGlomDocument()");
85                         }
86
87                         public void onSuccess(GlomDocument result) {
88                                 tableSelectionView.setTableSelection(result.getTableNames(), result.getTableTitles());
89
90                                 if (tableName == null || tableName.isEmpty()) {
91                                         tableName = result.getTableNames().get(result.getDefaultTableIndex());
92                                 }
93
94                                 tableSelectionView.setSelectedTableName(tableName);
95                                 documentTitle = result.getTitle();
96                                 Window.setTitle(documentTitle + ": " + result.getTableTitles().get(result.getDefaultTableIndex()));
97                         }
98                 };
99                 OnlineGlomServiceAsync.Util.getInstance().getGlomDocument(documentID, callback);
100
101                 // we're done, set the widget
102                 containerWidget.setWidget(tableSelectionView.asWidget());
103         }
104
105         // This method will be called before the {@link TableSelectionActivity#start(AcceptsOneWidget, EventBus)} method
106         public void setPlace(HasSelectableTablePlace place) {
107                 this.documentID = place.getDocumentID();
108                 this.tableName = place.getTableName();
109
110                 TableSelectionView tableSelectionView = clientFactory.getTableSelectionView();
111
112                 // show the 'back to list' link if we're at a DetailsPlace, hide it otherwise
113                 if (place instanceof DetailsPlace) {
114                         tableSelectionView.setBackLinkVisible(true);
115                         tableSelectionView.setBackLink(documentID, tableName);
116                 } else if (place instanceof ListPlace) {
117                         tableSelectionView.setBackLinkVisible(false);
118                 }
119         }
120
121         private void clearView() {
122                 clientFactory.getTableSelectionView().clear();
123                 if (changeHandlerRegistration != null) {
124                         changeHandlerRegistration.removeHandler();
125                         changeHandlerRegistration = null;
126                 }
127         }
128
129         /*
130          * (non-Javadoc)
131          * 
132          * @see com.google.gwt.activity.shared.AbstractActivity#onCancel()
133          */
134         @Override
135         public void onCancel() {
136                 clearView();
137         }
138
139         /*
140          * (non-Javadoc)
141          * 
142          * @see com.google.gwt.activity.shared.AbstractActivity#onStop()
143          */
144         @Override
145         public void onStop() {
146                 clearView();
147         }
148
149         /*
150          * (non-Javadoc)
151          * 
152          * @see org.glom.web.client.ui.TableSelectionView.Presenter#goTo(com.google.gwt.place.shared.Place)
153          */
154         @Override
155         public void goTo(Place place) {
156                 clientFactory.getPlaceController().goTo(place);
157         }
158
159 }