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11 package org.eclipse.help.ui.internal.views;
12
13 import org.eclipse.help.*;
14 import org.eclipse.help.ui.internal.*;
15 import org.eclipse.jface.action.*;
16 import org.eclipse.jface.viewers.*;
17 import org.eclipse.swt.SWT;
18 import org.eclipse.swt.custom.BusyIndicator;
19 import org.eclipse.swt.events.*;
20 import org.eclipse.swt.graphics.*;
21 import org.eclipse.swt.layout.*;
22 import org.eclipse.swt.widgets.*;
23 import org.eclipse.ui.IMemento;
24 import org.eclipse.ui.actions.ActionFactory;
25 import org.eclipse.ui.forms.AbstractFormPart;
26 import org.eclipse.ui.forms.events.HyperlinkEvent;
27 import org.eclipse.ui.forms.widgets.FormToolkit;
28
29 public abstract class HyperlinkTreePart extends AbstractFormPart implements
30 IHelpPart {
31 protected ReusableHelpPart parent;
32
33 private String  id;
34
35
37 protected TreeViewer treeViewer;
38
39 private TreeItem lastItem;
40
41 private Cursor handCursor;
42
43
48 public HyperlinkTreePart(Composite parent, final FormToolkit toolkit,
49 IToolBarManager tbm) {
50 handCursor = new Cursor(parent.getDisplay(), SWT.CURSOR_HAND);
51
65 treeViewer = new TreeViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL);
66 treeViewer.getTree().setMenu(parent.getMenu());
67 treeViewer.getTree().setForeground(
68 toolkit.getHyperlinkGroup().getForeground());
69 configureTreeViewer();
70 treeViewer.setInput(this);
71 treeViewer.getControl().setLayoutData(new GridData(GridData.FILL_BOTH));
72 treeViewer.addOpenListener(new IOpenListener() {
73 public void open(OpenEvent event) {
74 doOpenSelection((IStructuredSelection) event.getSelection());
75 }
76 });
77 treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
78 public void selectionChanged(SelectionChangedEvent event) {
79 handleSelectionChanged((IStructuredSelection) event
80 .getSelection());
81 }
82 });
83 treeViewer.getTree().addMouseListener(new MouseAdapter() {
84 long lastTime;
85
86 public void mouseUp(MouseEvent e) {
87 long eventTime = e.time & 0xFFFFFFFFL;
88 if (eventTime - lastTime <= e.display.getDoubleClickTime())
89 return;
90 if (e.button != 1)
91 return;
92 lastTime = eventTime;
93 Point p = new Point(e.x, e.y);
94 TreeItem item = treeViewer.getTree().getItem(p);
95 if (item != null) {
96 Object obj = item.getData();
97 if (obj != null) {
98 doOpen(obj);
99 }
100 }
101 }
102 });
103
104 treeViewer.getTree().addPaintListener(new PaintListener() {
105 public void paintControl(PaintEvent e) {
106 validateLastItem();
107 if (lastItem == null)
108 return;
109 Rectangle bounds = lastItem.getBounds();
110 boolean selected = false;
111 TreeItem[] items = lastItem.getParent().getSelection();
112 for (int i = 0; i < items.length; i++) {
113 if (items[i].equals(lastItem)) {
114 selected = true;
115 break;
116 }
117 }
118 if (selected)
119 e.gc.setForeground(e.display.getSystemColor(
120 SWT.COLOR_LIST_SELECTION_TEXT));
121 else
122 e.gc.setForeground(toolkit.getHyperlinkGroup()
123 .getActiveForeground());
124 FontMetrics fm = e.gc.getFontMetrics();
125 int height = fm.getHeight();
126 int lineY = bounds.y + height;
127 e.gc.drawLine(bounds.x, lineY, bounds.x + bounds.width - 1,
128 lineY);
129 }
130 });
131
132 treeViewer.getTree().addMouseTrackListener(new MouseTrackAdapter() {
133 public void mouseExit(MouseEvent e) {
134 validateLastItem();
135 if (lastItem != null) {
136 TreeItem item = lastItem;
137 lastItem = null;
138 item.setForeground(null);
139 }
140 }
141 });
142
143 treeViewer.getTree().addMouseMoveListener(new MouseMoveListener() {
144 public void mouseMove(MouseEvent e) {
145 Point p = new Point(e.x, e.y);
146 TreeItem item = treeViewer.getTree().getItem(p);
147 validateLastItem();
148 if (item != null) {
149 if (lastItem != null) {
150 if (!lastItem.equals(item)) {
151 lastItem.setForeground(null);
152 repaintItem(lastItem);
153 updateStatus(null);
154 lastItem = null;
155 } else
156 return;
157 }
158 Object obj = item.getData();
159 treeViewer.getTree().setCursor(handCursor);
160 IStructuredSelection ssel = (IStructuredSelection) treeViewer
161 .getSelection();
162 if (ssel.getFirstElement() == obj)
163 item.setForeground(e.display
164 .getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT));
165 else
166 item.setForeground(toolkit.getHyperlinkGroup()
167 .getActiveForeground());
168 lastItem = item;
169 repaintItem(lastItem);
170 if (obj instanceof IHelpResource)
171 updateStatus((IHelpResource) obj);
172 else
173 updateStatus(null);
174 return;
175 } else if (lastItem != null) {
176 lastItem.setForeground(null);
177 repaintItem(lastItem);
178 lastItem = null;
179 updateStatus(null);
180 }
181 treeViewer.getTree().setCursor(null);
182 }
183 });
184 contributeToToolBar(tbm);
185 }
186
187 public void dispose() {
188 handCursor.dispose();
189 super.dispose();
190 }
191
192 private void repaintItem(TreeItem item) {
193 Rectangle bounds = item.getBounds();
194 item.getParent().redraw(bounds.x, bounds.y, bounds.width,
195 bounds.height, false);
196 }
197
198 protected void contributeToToolBar(IToolBarManager tbm) {
199 Action collapseAllAction = new Action() {
200 public void run() {
201 BusyIndicator.showWhile(getControl().getDisplay(), new Runnable () {
202 public void run() {
203 doCollapseAll();
204 }
205 });
206 }
207 };
208 collapseAllAction.setImageDescriptor(HelpUIResources
209 .getImageDescriptor(IHelpUIConstants.IMAGE_COLLAPSE_ALL));
210 collapseAllAction
211 .setToolTipText(Messages.AllTopicsPart_collapseAll_tooltip);
212 tbm.insertBefore("back", collapseAllAction); tbm.insertBefore("back", new Separator()); }
215
216 private void doCollapseAll() {
217 Object [] expanded = treeViewer.getExpandedElements();
218 treeViewer.collapseAll();
219 treeViewer.update(expanded, null);
220 }
221
222
227 public Control getControl() {
228 return treeViewer.getControl();
229 }
230
231
236 public void init(ReusableHelpPart parent, String id, IMemento memento) {
237 this.parent = parent;
238 this.id = id;
239 }
240
241 public String getId() {
242 return id;
243 }
244
245
250 public void setVisible(boolean visible) {
251 getControl().setVisible(visible);
252 if (visible)
253 treeViewer.refresh();
254 }
255
256 private void doOpenSelection(IStructuredSelection sel) {
257 Object obj = sel.getFirstElement();
258 if (obj != null) {
259 doOpen(obj);
260 }
261 }
262
263 protected void handleSelectionChanged(IStructuredSelection sel) {
264 Object obj = sel.getFirstElement();
265 if (lastItem != null && !lastItem.isDisposed()) {
266 Object lastObj = lastItem.getData();
267 if (lastObj==obj)
268 lastItem.setForeground(getControl().getDisplay()
269 .getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT));
270 else
271 lastItem.setForeground(parent.getForm().getToolkit().getHyperlinkGroup()
272 .getActiveForeground());
273 repaintItem(lastItem);
274 }
275 if (obj instanceof IHelpResource) {
276 IHelpResource res = (IHelpResource) obj;
277 updateStatus(res, false);
278 } else
279 updateStatus(null, false);
280 }
281
282 private void updateStatus(IHelpResource res) {
283 updateStatus(res, true);
284 }
285
286 private void updateStatus(IHelpResource res, boolean defaultToSelection) {
287 if (defaultToSelection && res == null) {
288 IStructuredSelection ssel = (IStructuredSelection) treeViewer
289 .getSelection();
290 Object obj = ssel.getFirstElement();
291 if (obj instanceof IHelpResource)
292 res = (IHelpResource) obj;
293 }
294 if (res != null) {
295 String label = res.getLabel();
296 String href = getHref(res);
297 HyperlinkTreePart.this.parent.handleLinkEntered(new HyperlinkEvent(
298 treeViewer.getTree(), href, label, SWT.NULL));
299 } else {
300 HyperlinkTreePart.this.parent.handleLinkExited(null);
301 }
302 }
303
304 protected String getHref(IHelpResource res) {
305 return res.getHref();
306 }
307
308 protected abstract void configureTreeViewer();
309
310 protected abstract void doOpen(Object obj);
311
312 protected void postUpdate(final Object obj) {
313 treeViewer.getControl().getDisplay().asyncExec(new Runnable () {
314 public void run() {
315 treeViewer.update(obj, null);
316 }
317 });
318 }
319
320
325 public boolean fillContextMenu(IMenuManager manager) {
326 return parent.fillSelectionProviderMenu(treeViewer, manager,
327 canAddBookmarks());
328 }
329
330 protected abstract boolean canAddBookmarks();
331
332
337 public boolean hasFocusControl(Control focusControl) {
338 return treeViewer.getControl().equals(focusControl);
339 }
340
341 public void setFocus() {
342 if (treeViewer != null)
343 treeViewer.getTree().setFocus();
344 }
345
346 public IAction getGlobalAction(String id) {
347 if (id.equals(ActionFactory.COPY.getId()))
348 return parent.getCopyAction();
349 return null;
350 }
351
352 public void stop() {
353 }
354
355 private void validateLastItem() {
356 if (lastItem != null && lastItem.isDisposed())
357 lastItem = null;
358 }
359 }
360 |
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