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13 package org.eclipse.ui.dialogs;
14
15 import java.util.Arrays  ;
16 import java.util.List ;
17
18 import org.eclipse.jface.dialogs.IDialogConstants;
19 import org.eclipse.jface.viewers.ILabelProvider;
20 import org.eclipse.swt.SWT;
21 import org.eclipse.swt.events.DisposeEvent;
22 import org.eclipse.swt.events.DisposeListener;
23 import org.eclipse.swt.layout.GridData;
24 import org.eclipse.swt.widgets.Composite;
25 import org.eclipse.swt.widgets.Control;
26 import org.eclipse.swt.widgets.Event;
27 import org.eclipse.swt.widgets.Label;
28 import org.eclipse.swt.widgets.Listener;
29 import org.eclipse.swt.widgets.Shell;
30 import org.eclipse.swt.widgets.Table;
31 import org.eclipse.swt.widgets.TableItem;
32
33
39 public class TwoPaneElementSelector extends AbstractElementListSelectionDialog {
40 private String fUpperListLabel;
41
42 private String fLowerListLabel;
43
44 private ILabelProvider fQualifierRenderer;
45
46 private Object [] fElements = new Object [0];
47
48 private Table fLowerList;
49
50 private Object [] fQualifierElements;
51
52
62 public TwoPaneElementSelector(Shell parent, ILabelProvider elementRenderer,
63 ILabelProvider qualifierRenderer) {
64 super(parent, elementRenderer);
65 setSize(50, 15);
66 setAllowDuplicates(false);
67 fQualifierRenderer = qualifierRenderer;
68 }
69
70
76 public void setUpperListLabel(String label) {
77 fUpperListLabel = label;
78 }
79
80
87 public void setLowerListLabel(String label) {
88 fLowerListLabel = label;
89 }
90
91
97 public void setElements(Object [] elements) {
98 fElements = elements;
99 }
100
101
104 public Control createDialogArea(Composite parent) {
105 Composite contents = (Composite) super.createDialogArea(parent);
106 createMessageArea(contents);
107 createFilterText(contents);
108 createLabel(contents, fUpperListLabel);
109 createFilteredList(contents);
110 createLabel(contents, fLowerListLabel);
111 createLowerList(contents);
112 setListElements(fElements);
113 List initialSelections = getInitialElementSelections();
114 if (!initialSelections.isEmpty()) {
115 Object element = initialSelections.get(0);
116 setSelection(new Object [] { element });
117 setLowerSelectedElement(element);
118 }
119 return contents;
120 }
121
122
132 protected Label createLabel(Composite parent, String name) {
133 if (name == null) {
134 return null;
135 }
136 Label label = new Label(parent, SWT.NONE);
137 label.setText(name);
138 label.setFont(parent.getFont());
139 return label;
140 }
141
142
149 protected Table createLowerList(Composite parent) {
150 Table list = new Table(parent, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
151 list.addListener(SWT.Selection, new Listener() {
152 public void handleEvent(Event evt) {
153 handleLowerSelectionChanged();
154 }
155 });
156 list.addListener(SWT.MouseDoubleClick, new Listener() {
157 public void handleEvent(Event evt) {
158 handleDefaultSelected();
159 }
160 });
161 list.addDisposeListener(new DisposeListener() {
162 public void widgetDisposed(DisposeEvent e) {
163 fQualifierRenderer.dispose();
164 }
165 });
166 GridData data = new GridData();
167 data.widthHint = convertWidthInCharsToPixels(50);
168 data.heightHint = convertHeightInCharsToPixels(5);
169 data.grabExcessVerticalSpace = true;
170 data.grabExcessHorizontalSpace = true;
171 data.horizontalAlignment = GridData.FILL;
172 data.verticalAlignment = GridData.FILL;
173 list.setLayoutData(data);
174 list.setFont(parent.getFont());
175 fLowerList = list;
176 return list;
177 }
178
179
182 protected void computeResult() {
183 Object [] results = new Object [] { getLowerSelectedElement() };
184 setResult(Arrays.asList(results));
185 }
186
187
190 protected void handleDefaultSelected() {
191 if (validateCurrentSelection() && (getLowerSelectedElement() != null)) {
192 buttonPressed(IDialogConstants.OK_ID);
193 }
194 }
195
196
199 protected void handleSelectionChanged() {
200 handleUpperSelectionChanged();
201 }
202
203 private void handleUpperSelectionChanged() {
204 int index = getSelectionIndex();
205 fLowerList.removeAll();
206 if (index >= 0) {
207 fQualifierElements = getFoldedElements(index);
208 if (fQualifierElements == null) {
209 updateLowerListWidget(new Object [] {});
210 } else {
211 updateLowerListWidget(fQualifierElements);
212 }
213 }
214 validateCurrentSelection();
215 }
216
217 private void handleLowerSelectionChanged() {
218 validateCurrentSelection();
219 }
220
221
225 protected void setLowerSelectedElement(Object element) {
226 if (fQualifierElements == null) {
227 return;
228 }
229 int i;
231 for (i = 0; i != fQualifierElements.length; i++) {
232 if (fQualifierElements[i].equals(element)) {
233 break;
234 }
235 }
236 if (i != fQualifierElements.length) {
238 fLowerList.setSelection(i);
239 }
240 }
241
242
246 protected Object getLowerSelectedElement() {
247 int index = fLowerList.getSelectionIndex();
248 if (index >= 0) {
249 return fQualifierElements[index];
250 }
251 return null;
252 }
253
254 private void updateLowerListWidget(Object [] elements) {
255 int length = elements.length;
256 String [] qualifiers = new String [length];
257 for (int i = 0; i != length; i++){
258 String text = fQualifierRenderer.getText(elements[i]);
259 if(text == null) {
260 text = ""; }
262 qualifiers[i] = text;
263 }
264 TwoArrayQuickSorter sorter = new TwoArrayQuickSorter(isCaseIgnored());
265 sorter.sort(qualifiers, elements);
266 for (int i = 0; i != length; i++) {
267 TableItem item = new TableItem(fLowerList, SWT.NONE);
268 item.setText(qualifiers[i]);
269 item.setImage(fQualifierRenderer.getImage(elements[i]));
270 }
271 if (fLowerList.getItemCount() > 0) {
272 fLowerList.setSelection(0);
273 }
274 }
275
276
279 protected void handleEmptyList() {
280 super.handleEmptyList();
281 fLowerList.setEnabled(false);
282 }
283 }
284 |
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