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1
13 package org.eclipse.ui.dialogs;
14
15 import java.util.ArrayList  ;
16 import java.util.List ;
17
18 import org.eclipse.core.runtime.IStatus;
19 import org.eclipse.core.runtime.Status;
20 import org.eclipse.jface.dialogs.IDialogConstants;
21 import org.eclipse.jface.viewers.DoubleClickEvent;
22 import org.eclipse.jface.viewers.IDoubleClickListener;
23 import org.eclipse.jface.viewers.ILabelProvider;
24 import org.eclipse.jface.viewers.ISelection;
25 import org.eclipse.jface.viewers.ISelectionChangedListener;
26 import org.eclipse.jface.viewers.IStructuredSelection;
27 import org.eclipse.jface.viewers.ITreeContentProvider;
28 import org.eclipse.jface.viewers.SelectionChangedEvent;
29 import org.eclipse.jface.viewers.StructuredSelection;
30 import org.eclipse.jface.viewers.TreeViewer;
31 import org.eclipse.jface.viewers.ViewerComparator;
32 import org.eclipse.jface.viewers.ViewerFilter;
33 import org.eclipse.jface.viewers.ViewerSorter;
34 import org.eclipse.swt.SWT;
35 import org.eclipse.swt.custom.BusyIndicator;
36 import org.eclipse.swt.events.SelectionAdapter;
37 import org.eclipse.swt.events.SelectionEvent;
38 import org.eclipse.swt.layout.GridData;
39 import org.eclipse.swt.widgets.Composite;
40 import org.eclipse.swt.widgets.Control;
41 import org.eclipse.swt.widgets.Label;
42 import org.eclipse.swt.widgets.Shell;
43 import org.eclipse.swt.widgets.Tree;
44 import org.eclipse.ui.PlatformUI;
45 import org.eclipse.ui.internal.WorkbenchMessages;
46
47
52 public class ElementTreeSelectionDialog extends SelectionStatusDialog {
53
54 private TreeViewer fViewer;
55
56 private ILabelProvider fLabelProvider;
57
58 private ITreeContentProvider fContentProvider;
59
60 private ISelectionStatusValidator fValidator = null;
61
62 private ViewerComparator fComparator;
63
64 private boolean fAllowMultiple = true;
65
66 private boolean fDoubleClickSelects = true;
67
68 private String fEmptyListMessage = WorkbenchMessages.ElementTreeSelectionDialog_nothing_available;
69
70 private IStatus fCurrStatus = new Status(IStatus.OK, PlatformUI.PLUGIN_ID,
71 IStatus.OK, "", null);
73 private List fFilters;
74
75 private Object fInput;
76
77 private boolean fIsEmpty;
78
79 private int fWidth = 60;
80
81 private int fHeight = 18;
82
83
89 public ElementTreeSelectionDialog(Shell parent,
90 ILabelProvider labelProvider, ITreeContentProvider contentProvider) {
91 super(parent);
92
93 fLabelProvider = labelProvider;
94 fContentProvider = contentProvider;
95
96 setResult(new ArrayList (0));
97 setStatusLineAboveButtons(true);
98
99 int shellStyle = getShellStyle();
100 setShellStyle(shellStyle | SWT.MAX | SWT.RESIZE);
101 }
102
103
108 public void setInitialSelection(Object selection) {
109 setInitialSelections(new Object [] { selection });
110 }
111
112
116 public void setEmptyListMessage(String message) {
117 fEmptyListMessage = message;
118 }
119
120
124 public void setAllowMultiple(boolean allowMultiple) {
125 fAllowMultiple = allowMultiple;
126 }
127
128
132 public void setDoubleClickSelects(boolean doubleClickSelects) {
133 fDoubleClickSelects = doubleClickSelects;
134 }
135
136
141 public void setSorter(ViewerSorter sorter) {
142 fComparator = sorter;
143 }
144
145
150 public void setComparator(ViewerComparator comparator){
151 fComparator = comparator;
152 }
153
154
158 public void addFilter(ViewerFilter filter) {
159 if (fFilters == null) {
160 fFilters = new ArrayList (4);
161 }
162
163 fFilters.add(filter);
164 }
165
166
171 public void setValidator(ISelectionStatusValidator validator) {
172 fValidator = validator;
173 }
174
175
179 public void setInput(Object input) {
180 fInput = input;
181 }
182
183
188 public void setSize(int width, int height) {
189 fWidth = width;
190 fHeight = height;
191 }
192
193
197 protected void updateOKStatus() {
198 if (!fIsEmpty) {
199 if (fValidator != null) {
200 fCurrStatus = fValidator.validate(getResult());
201 updateStatus(fCurrStatus);
202 } else {
203 fCurrStatus = new Status(IStatus.OK, PlatformUI.PLUGIN_ID,
204 IStatus.OK, "", null);
206 }
207 } else {
208 fCurrStatus = new Status(IStatus.ERROR, PlatformUI.PLUGIN_ID,
209 IStatus.ERROR, fEmptyListMessage, null);
210 }
211 updateStatus(fCurrStatus);
212 }
213
214
218 public int open() {
219 fIsEmpty = evaluateIfTreeEmpty(fInput);
220 super.open();
221 return getReturnCode();
222 }
223
224 private void access$superCreate() {
225 super.create();
226 }
227
228
231 protected void cancelPressed() {
232 setResult(null);
233 super.cancelPressed();
234 }
235
236
239 protected void computeResult() {
240 setResult(((IStructuredSelection) fViewer.getSelection()).toList());
241 }
242
243
247 public void create() {
248 BusyIndicator.showWhile(null, new Runnable () {
249 public void run() {
250 access$superCreate();
251 fViewer.setSelection(new StructuredSelection(
252 getInitialElementSelections()), true);
253 updateOKStatus();
254 }
255 });
256 }
257
258
261 protected Control createDialogArea(Composite parent) {
262 Composite composite = (Composite) super.createDialogArea(parent);
263
264 Label messageLabel = createMessageArea(composite);
265 TreeViewer treeViewer = createTreeViewer(composite);
266
267 GridData data = new GridData(GridData.FILL_BOTH);
268 data.widthHint = convertWidthInCharsToPixels(fWidth);
269 data.heightHint = convertHeightInCharsToPixels(fHeight);
270
271 Tree treeWidget = treeViewer.getTree();
272 treeWidget.setLayoutData(data);
273 treeWidget.setFont(parent.getFont());
274
275 if (fIsEmpty) {
276 messageLabel.setEnabled(false);
277 treeWidget.setEnabled(false);
278 }
279
280 return composite;
281 }
282
283
289 protected TreeViewer createTreeViewer(Composite parent) {
290 int style = SWT.BORDER | (fAllowMultiple ? SWT.MULTI : SWT.SINGLE);
291
292 fViewer = new TreeViewer(new Tree(parent, style));
293 fViewer.setContentProvider(fContentProvider);
294 fViewer.setLabelProvider(fLabelProvider);
295 fViewer.addSelectionChangedListener(new ISelectionChangedListener() {
296 public void selectionChanged(SelectionChangedEvent event) {
297 access$setResult(((IStructuredSelection) event.getSelection())
298 .toList());
299 updateOKStatus();
300 }
301 });
302
303 fViewer.setComparator(fComparator);
304 if (fFilters != null) {
305 for (int i = 0; i != fFilters.size(); i++) {
306 fViewer.addFilter((ViewerFilter) fFilters.get(i));
307 }
308 }
309
310 if (fDoubleClickSelects) {
311 Tree tree = fViewer.getTree();
312 tree.addSelectionListener(new SelectionAdapter() {
313 public void widgetDefaultSelected(SelectionEvent e) {
314 updateOKStatus();
315 if (fCurrStatus.isOK()) {
316 access$superButtonPressed(IDialogConstants.OK_ID);
317 }
318 }
319 });
320 }
321 fViewer.addDoubleClickListener(new IDoubleClickListener() {
322 public void doubleClick(DoubleClickEvent event) {
323 updateOKStatus();
324
325 if (!(fDoubleClickSelects && fCurrStatus.isOK())) {
328 ISelection selection = event.getSelection();
329 if (selection instanceof IStructuredSelection) {
330 Object item = ((IStructuredSelection) selection)
331 .getFirstElement();
332 if (fViewer.getExpandedState(item)) {
333 fViewer.collapseToLevel(item, 1);
334 } else {
335 fViewer.expandToLevel(item, 1);
336 }
337 }
338 }
339 }
340 });
341
342 fViewer.setInput(fInput);
343
344 return fViewer;
345 }
346
347
352 protected TreeViewer getTreeViewer() {
353 return fViewer;
354 }
355
356 private boolean evaluateIfTreeEmpty(Object input) {
357 Object [] elements = fContentProvider.getElements(input);
358 if (elements.length > 0) {
359 if (fFilters != null) {
360 for (int i = 0; i < fFilters.size(); i++) {
361 ViewerFilter curr = (ViewerFilter) fFilters.get(i);
362 elements = curr.filter(fViewer, input, elements);
363 }
364 }
365 }
366 return elements.length == 0;
367 }
368
369
375 protected void access$superButtonPressed(int id) {
376 super.buttonPressed(id);
377 }
378
379
385 protected void access$setResult(List result) {
386 super.setResult(result);
387 }
388
389
392 protected void handleShellCloseEvent() {
393 super.handleShellCloseEvent();
394
395 if (getReturnCode() == CANCEL) {
397 setResult(null);
398 }
399 }
400
401 }
402 |
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