gitorious.org Git - online-glom:gwt-glom.git/blob - src/main/java/org/glom/web/client/activity/DetailsActivity.java

1 /*

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 java.util.ArrayList;

23

24 import org.glom.web.client.ClientFactory;

25 import org.glom.web.client.OnlineGlomServiceAsync;

26 import org.glom.web.client.Utils;

27 import org.glom.web.client.event.TableChangeEvent;

28 import org.glom.web.client.event.TableChangeEventHandler;

29 import org.glom.web.client.place.DetailsPlace;

30 import org.glom.web.client.place.DocumentSelectionPlace;

31 import org.glom.web.client.ui.DetailsView;

32 import org.glom.web.client.ui.View;

33 import org.glom.web.client.ui.cell.NavigationButtonCell;

34 import org.glom.web.client.ui.details.DetailsCell;

35 import org.glom.web.client.ui.details.Portal;

36 import org.glom.web.client.ui.details.RelatedListTable;

37 import org.glom.web.shared.DataItem;

38 import org.glom.web.shared.DetailsLayoutAndData;

39 import org.glom.web.shared.NavigationRecord;

40 import org.glom.web.shared.TypedDataItem;

41 import org.glom.web.shared.layout.LayoutGroup;

42 import org.glom.web.shared.layout.LayoutItemField;

43 import org.glom.web.shared.layout.LayoutItemPortal;

44

45 import com.google.gwt.activity.shared.AbstractActivity;

46 import com.google.gwt.cell.client.ValueUpdater;

47 import com.google.gwt.core.client.GWT;

48 import com.google.gwt.dom.client.Element;

49 import com.google.gwt.dom.client.NativeEvent;

50 import com.google.gwt.event.dom.client.ClickEvent;

51 import com.google.gwt.event.dom.client.ClickHandler;

52 import com.google.gwt.event.shared.EventBus;

53 import com.google.gwt.place.shared.Place;

54 import com.google.gwt.user.client.rpc.AsyncCallback;

55 import com.google.gwt.user.client.ui.AcceptsOneWidget;

56

57 /**

58 *

59 */

60 public class DetailsActivity extends AbstractActivity implements View.Presenter {

61 /*

62 * Cell renderer for the related list open buttons. Normally this wouldn't be in an Activity class but since it's

63 * making a call to the server it makes sense for it to be here.

64 */

65 private class RelatedListNavigationButtonCell extends NavigationButtonCell {

66

67 private String relationshipName;

68

69 public RelatedListNavigationButtonCell(String relationshipName) {

70 this.relationshipName = relationshipName;

71 }

72

73 /*

74 * (non-Javadoc)

75 *

76 * @see com.google.gwt.cell.client.ButtonCell#onEnterKeyDown(com.google.gwt.cell.client.Cell.Context,

77 * com.google.gwt.dom.client.Element, java.lang.String, com.google.gwt.dom.client.NativeEvent,

78 * com.google.gwt.cell.client.ValueUpdater)

79 */

80 @Override

81 protected void onEnterKeyDown(Context context, Element parent, String value, NativeEvent event,

82 ValueUpdater<String> valueUpdater) {

83 AsyncCallback<NavigationRecord> callback = new AsyncCallback<NavigationRecord>() {

84 public void onFailure(Throwable caught) {

85 // TODO: create a way to notify users of asynchronous callback failures

86 GWT.log("AsyncCallback Failed: OnlineGlomService.getSuitableRecordToViewDetails()");

87 }

88

89 @Override

90 public void onSuccess(NavigationRecord result) {

91 processNavigation(result.getTableName(), result.getPrimaryKeyValue());

92 }

93

94 };

95 OnlineGlomServiceAsync.Util.getInstance().getSuitableRecordToViewDetails(documentID, tableName,

96 relationshipName, (TypedDataItem) context.getKey(), callback);

97 }

98 }

99

100 private final String documentID;

101 private final String tableName;

102 private TypedDataItem primaryKeyValue;

103 private final ClientFactory clientFactory;

104 private final DetailsView detailsView;

105 ArrayList<DetailsCell> detailsCells;

106 ArrayList<Portal> portals;

107

108 public DetailsActivity(DetailsPlace place, ClientFactory clientFactory) {

109 this.documentID = place.getDocumentID();

110 this.tableName = place.getTableName();

111 this.primaryKeyValue = place.getPrimaryKeyValue();

112 this.clientFactory = clientFactory;

113 detailsView = clientFactory.getDetailsView();

114 }

115

116 /*

117 * (non-Javadoc)

118 *

119 * @see com.google.gwt.activity.shared.Activity#start(com.google.gwt.user.client.ui.AcceptsOneWidget,

120 * com.google.gwt.event.shared.EventBus)

121 */

122 @Override

123 public void start(AcceptsOneWidget panel, EventBus eventBus) {

124 if (documentID.isEmpty())

125 goTo(new DocumentSelectionPlace());

126

127 // register this class as the presenter

128 detailsView.setPresenter(this);

129

130 // TODO here's where we should check for database authentication - see ListActivity.start() for how to do this

131

132 // set the change handler for the table selection widget

133 eventBus.addHandler(TableChangeEvent.TYPE, new TableChangeEventHandler() {

134 @Override

135 public void onTableChange(final TableChangeEvent event) {

136 // note the empty primary key item

137 goTo(new DetailsPlace(documentID, event.getNewTableName(), new TypedDataItem()));

138 }

139 });

140

141 // get the layout and data for the DetailsView

142 AsyncCallback<DetailsLayoutAndData> callback = new AsyncCallback<DetailsLayoutAndData>() {

143 public void onFailure(Throwable caught) {

144 // TODO: create a way to notify users of asynchronous callback failures

145 GWT.log("AsyncCallback Failed: OnlineGlomService.getDetailsLayoutAndData()");

146 }

147

148 @Override

149 public void onSuccess(DetailsLayoutAndData result) {

150 if (result == null) {

151 // The result is null only when the documentID was not found. There's nothing to display without the

152 // documentID.

153 goTo(new DocumentSelectionPlace());

154 } else {

155 // create the layout and set the data

156 createLayout(result.getLayout());

157 setData(result.getData());

158 }

159 }

160

161 };

162 OnlineGlomServiceAsync.Util.getInstance().getDetailsLayoutAndData(documentID, tableName, primaryKeyValue,

163 callback);

164

165 // indicate that the view is ready to be displayed

166 panel.setWidget(detailsView.asWidget());

167 }

168

169 /*

170 * Create the layout.

171 */

172 private void createLayout(ArrayList<LayoutGroup> layout) {

173 // add the groups

174 for (LayoutGroup layoutGroup : layout) {

175 detailsView.addGroup(layoutGroup);

176 }

177

178 // save references to the DetailsCells and the Portals

179 detailsCells = detailsView.getCells();

180 portals = detailsView.getPortals();

181

182 // Setup click handlers for the navigation buttons

183 for (final DetailsCell detailsCell : detailsCells) {

184 final LayoutItemField layoutItemField = detailsCell.getLayoutItemField();

185 if (layoutItemField.getAddNavigation()) {

186 detailsCell.setOpenButtonClickHandler(new ClickHandler() {

187 @Override

188 public void onClick(ClickEvent event) {

189 TypedDataItem primaryKeyItem = Utils.getTypedDataItem(layoutItemField.getType(),

190 detailsCell.getData());

191 processNavigation(layoutItemField.getNavigationTableName(), primaryKeyItem);

192

193 }

194 });

195 }

196 }

197

198 }

199

200 /*

201 * Set the data.

202 */

203 private void setData(DataItem[] data) {

204

205 if (data == null)

206 return;

207

208 // TODO create proper client side logging

209 if (data.length != detailsCells.size())

210 GWT.log("Warning: The number of data items doesn't match the number of data detailsCells.");

211

212 for (int i = 0; i < Math.min(detailsCells.size(), data.length); i++) {

213 DetailsCell detailsCell = detailsCells.get(i);

214 if (data[i] != null) {

215

216 // set the DatailsItem

217 detailsCell.setData(data[i]);

218

219 // see if there are any related lists that need to be setup

220 for (Portal portal : portals) {

221 LayoutItemField layoutItemField = detailsCell.getLayoutItemField();

222 LayoutItemPortal layoutItemPortal = portal.getLayoutItem();

223

224 if (layoutItemField.getName().equals(layoutItemPortal.getFromField())) {

225 if (data[i] == null)

226 continue;

227

228 TypedDataItem foreignKeyValue = Utils.getTypedDataItem(layoutItemField.getType(), data[i]);

229

230 RelatedListTable relatedListTable = new RelatedListTable(documentID, layoutItemPortal,

231 foreignKeyValue, new RelatedListNavigationButtonCell(layoutItemPortal.getName()));

232

233 if (!layoutItemPortal.getAddNavigation()

234 || layoutItemPortal.getNavigationType() == LayoutItemPortal.NavigationType.NAVIGATION_NONE) {

235 relatedListTable.hideNavigationButtons();

236 }

237 portal.setContents(relatedListTable);

238

239 setRowCountForRelatedListTable(relatedListTable, layoutItemPortal.getName(), foreignKeyValue);

240 }

241 }

242 }

243 }

244 }

245

246 private void refreshData() {

247

248 // get the data for the DetailsView

249 AsyncCallback<DataItem[]> callback = new AsyncCallback<DataItem[]>() {

250 public void onFailure(Throwable caught) {

251 // TODO: create a way to notify users of asynchronous callback failures

252 GWT.log("AsyncCallback Failed: OnlineGlomService.getDetailsData()");

253 }

254

255 @Override

256 public void onSuccess(DataItem[] result) {

257 setData(result);

258 }

259 };

260

261 OnlineGlomServiceAsync.Util.getInstance().getDetailsData(documentID, tableName, primaryKeyValue, callback);

262

263 }

264

265 // sets the row count for the related list table

266 private void setRowCountForRelatedListTable(final RelatedListTable relatedListTable, String relationshipName,

267 TypedDataItem foreignKeyValue) {

268 AsyncCallback<Integer> callback = new AsyncCallback<Integer>() {

269 public void onFailure(Throwable caught) {

270 // TODO: create a way to notify users of asynchronous callback failures

271 GWT.log("AsyncCallback Failed: OnlineGlomService.getRelatedListRowCount()");

272 }

273

274 @Override

275 public void onSuccess(Integer result) {

276 if (result.intValue() <= relatedListTable.getMinNumVisibleRows()) {

277 // Set the table row count to the minimum row count if the data row count is less than or equal to

278 // the minimum row count. This ensures that data with fewer rows than the minimum will not create

279 // indexes in the underlying CellTable that will override the rendering of the empty rows.

280 relatedListTable.setRowCount(relatedListTable.getMinNumVisibleRows());

281 } else {

282 // Set the table row count to the data row count if it's larger than the minimum number of rows

283 // visible.

284 relatedListTable.setRowCount(result.intValue());

285 }

286 }

287 };

288

289 OnlineGlomServiceAsync.Util.getInstance().getRelatedListRowCount(documentID, tableName, relationshipName,

290 foreignKeyValue, callback);

291 }

292

293 /*

294 * Process a navigation by either doing: nothing if the navigation isn't valid, refreshing the data for the current

295 * table with a new primary key, or going to a new table with a new primary key.

296 */

297 private void processNavigation(String navigationTableName, TypedDataItem navigationPrimaryKeyValue) {

298

299 // Ensure the new table name is valid.

300 String newTableName;

301 if (navigationTableName != null && !navigationTableName.isEmpty()) {

302 newTableName = navigationTableName;

303 } else {

304 newTableName = tableName;

305 }

306

307 // Only process the navigation if there's a valid primary key value.

308 if (navigationPrimaryKeyValue != null && !navigationPrimaryKeyValue.isEmpty()) {

309 if (!newTableName.equals(tableName)) {

310 // Go to a new DetailsPlace because the table name has changed.

311 goTo(new DetailsPlace(documentID, newTableName, navigationPrimaryKeyValue));

312 } else {

313 // Refresh the details view with the new primary because the table name has not changed.

314 primaryKeyValue = navigationPrimaryKeyValue;

315 refreshData();

316 }

317 } else {

318 // TODO notify the user that navigation isn't possible.

319 // This is what Glom displays:

320 // Frame_Glom::show_ok_dialog(_("No Corresponding Record Exists"),

321 // _("No record with this value exists. Therefore navigation to the related record is not possible."),

322 // *window, Gtk::MESSAGE_WARNING);

323 // TODO: Make it more clear to the user exactly what record, what field, and what value, we are talking

324 // about.

325 }

326 }

327

328 /*

329 * (non-Javadoc)

330 *

331 * @see com.google.gwt.activity.shared.Activity#onCancel()

332 */

333 @Override

334 public void onCancel() {

335 detailsView.clear();

336 }

337

338 /*

339 * (non-Javadoc)

340 *

341 * @see com.google.gwt.activity.shared.Activity#onStop()

342 */

343 @Override

344 public void onStop() {

345 detailsView.clear();

346 }

347

348 /*

349 * (non-Javadoc)

350 *

351 * @see org.glom.web.client.ui.View.Presenter#goTo(com.google.gwt.place.shared.Place)

352 */

353 @Override

354 public void goTo(Place place) {

355 clientFactory.getPlaceController().goTo(place);

356 }

357

358 }