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

30

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

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

33 import com.google.gwt.event.dom.client.ChangeEvent;

34 import com.google.gwt.event.dom.client.ChangeHandler;

35 import com.google.gwt.event.dom.client.HasChangeHandlers;

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

37 import com.google.gwt.event.shared.HandlerRegistration;

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

39 import com.google.gwt.user.client.Window;

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

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

42 import com.google.gwt.user.client.ui.ListBox;

43

44 /**

45 * @author Ben Konrath <ben@bagu.org>

46 *

47 */

48 public class TableSelectionActivity extends AbstractActivity implements TableSelectionView.Presenter {

49 private final ClientFactory clientFactory;

50 private String documentID;

51 private String documentTitle;

52 private String tableName;

53 private HandlerRegistration changeHandlerRegistration = null;

54

55 // This activity isn't properly configured until the List or Details Place is set with the appropriate methods

56 public TableSelectionActivity(ClientFactory clientFactory) {

57 this.clientFactory = clientFactory;

58 }

59

60 /**

61 * Invoked by the ActivityManager to start a new Activity

62 */

63 @Override

64 public void start(AcceptsOneWidget containerWidget, final EventBus eventBus) {

65

66 final TableSelectionView tableSelectionView = clientFactory.getTableSelectionView();

67 tableSelectionView.setPresenter(this);

68

69 HasChangeHandlers tableSelector = tableSelectionView.getTableSelector();

70

71 changeHandlerRegistration = tableSelector.addChangeHandler(new ChangeHandler() {

72 @Override

73 public void onChange(ChangeEvent event) {

74 ListBox listBox = (ListBox) event.getSource();

75 int selectedIndex = listBox.getSelectedIndex();

76 eventBus.fireEvent(new TableChangeEvent(selectedIndex < 0 ? "" : listBox.getValue(selectedIndex)));

77 Window.setTitle(documentTitle + (selectedIndex < 0 ? "" : ": " + listBox.getItemText(selectedIndex)));

78 }

79 });

80

81 // get the table names, table titles and default table index for the current document

82 AsyncCallback<DocumentInfo> callback = new AsyncCallback<DocumentInfo>() {

83 public void onFailure(Throwable caught) {

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

85 GWT.log("AsyncCallback Failed: OnlineGlomService.getDocumentInfo()");

86 }

87

88 public void onSuccess(DocumentInfo result) {

89 tableSelectionView.setTableSelection(result.getTableNames(), result.getTableTitles());

90

91 if (tableName == null || tableName.isEmpty()) {

92 tableName = result.getTableNames().get(result.getDefaultTableIndex());

93 }

94

95 tableSelectionView.setSelectedTableName(tableName);

96 documentTitle = result.getTitle();

97 tableSelectionView.setDocumentTitle(documentTitle);

98 Window.setTitle(documentTitle + ": " + result.getTableTitles().get(result.getDefaultTableIndex()));

99 }

100 };

101 OnlineGlomServiceAsync.Util.getInstance().getDocumentInfo(documentID, callback);

102

103 // we're done, set the widget

104 containerWidget.setWidget(tableSelectionView.asWidget());

105 }

106

107 // This method will be called before the {@link TableSelectionActivity#start(AcceptsOneWidget, EventBus)} method

108 public void setPlace(HasSelectableTablePlace place) {

109 this.documentID = place.getDocumentID();

110 this.tableName = place.getTableName();

111

112 TableSelectionView tableSelectionView = clientFactory.getTableSelectionView();

113

114 // show the 'back to list' link if we're at a DetailsPlace, hide it otherwise

115 if (place instanceof DetailsPlace) {

116 tableSelectionView.setBackLinkVisible(true);

117 tableSelectionView.setBackLink(documentID, tableName);

118 } else if (place instanceof ListPlace) {

119 tableSelectionView.setBackLinkVisible(false);

120 }

121 }

122

123 private void clearView() {

124 clientFactory.getTableSelectionView().clear();

125 if (changeHandlerRegistration != null) {

126 changeHandlerRegistration.removeHandler();

127 changeHandlerRegistration = null;

128 }

129 }

130

131 /*

132 * (non-Javadoc)

133 *

134 * @see com.google.gwt.activity.shared.AbstractActivity#onCancel()

135 */

136 @Override

137 public void onCancel() {

138 clearView();

139 }

140

141 /*

142 * (non-Javadoc)

143 *

144 * @see com.google.gwt.activity.shared.AbstractActivity#onStop()

145 */

146 @Override

147 public void onStop() {

148 clearView();

149 }

150

151 /*

152 * (non-Javadoc)

153 *

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

155 */

156 @Override

157 public void goTo(Place place) {

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

159 }

160

161 }