| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2014 École Polytechnique de Montréal |
| 3 | * |
| 4 | * All rights reserved. This program and the accompanying materials are |
| 5 | * made available under the terms of the Eclipse Public License v1.0 which |
| 6 | * accompanies this distribution, and is available at |
| 7 | * http://www.eclipse.org/legal/epl-v10.html |
| 8 | * |
| 9 | * Contributors: |
| 10 | * Geneviève Bastien - Initial API and implementation |
| 11 | *******************************************************************************/ |
| 12 | |
| 13 | package org.eclipse.linuxtools.tmf.ui.viewers.tree; |
| 14 | |
| 15 | import java.util.List; |
| 16 | |
| 17 | import org.eclipse.jface.viewers.AbstractTreeViewer; |
| 18 | import org.eclipse.jface.viewers.IBaseLabelProvider; |
| 19 | import org.eclipse.jface.viewers.ILabelProviderListener; |
| 20 | import org.eclipse.jface.viewers.ISelectionChangedListener; |
| 21 | import org.eclipse.jface.viewers.ITableColorProvider; |
| 22 | import org.eclipse.jface.viewers.ITableFontProvider; |
| 23 | import org.eclipse.jface.viewers.ITableLabelProvider; |
| 24 | import org.eclipse.jface.viewers.ITreeContentProvider; |
| 25 | import org.eclipse.jface.viewers.TreeViewer; |
| 26 | import org.eclipse.jface.viewers.Viewer; |
| 27 | import org.eclipse.linuxtools.tmf.core.signal.TmfRangeSynchSignal; |
| 28 | import org.eclipse.linuxtools.tmf.core.signal.TmfSignalHandler; |
| 29 | import org.eclipse.linuxtools.tmf.core.signal.TmfTimeSynchSignal; |
| 30 | import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace; |
| 31 | import org.eclipse.linuxtools.tmf.ui.viewers.TmfTimeViewer; |
| 32 | import org.eclipse.swt.SWT; |
| 33 | import org.eclipse.swt.graphics.Color; |
| 34 | import org.eclipse.swt.graphics.Font; |
| 35 | import org.eclipse.swt.graphics.Image; |
| 36 | import org.eclipse.swt.widgets.Composite; |
| 37 | import org.eclipse.swt.widgets.Control; |
| 38 | import org.eclipse.swt.widgets.Display; |
| 39 | import org.eclipse.swt.widgets.Event; |
| 40 | import org.eclipse.swt.widgets.Listener; |
| 41 | import org.eclipse.swt.widgets.Tree; |
| 42 | import org.eclipse.swt.widgets.TreeColumn; |
| 43 | |
| 44 | /** |
| 45 | * Abstract class for viewers who will display data using a TreeViewer. It |
| 46 | * automatically synchronizes with time information of the UI. It also |
| 47 | * implements some common functionalities for all tree viewer, such as managing |
| 48 | * the column data, content initialization and update. The viewer implementing |
| 49 | * this does not have to worry about whether some code runs in the UI thread or |
| 50 | * not. |
| 51 | * |
| 52 | * @author Geneviève Bastien |
| 53 | * @since 3.0 |
| 54 | */ |
| 55 | public abstract class AbstractTmfTreeViewer extends TmfTimeViewer { |
| 56 | |
| 57 | private final TreeViewer fTreeViewer; |
| 58 | |
| 59 | // ------------------------------------------------------------------------ |
| 60 | // Internal classes |
| 61 | // ------------------------------------------------------------------------ |
| 62 | |
| 63 | /* The elements of the tree viewer are of type ITmfTreeViewerEntry */ |
| 64 | private class TreeContentProvider implements ITreeContentProvider { |
| 65 | |
| 66 | @Override |
| 67 | public void dispose() { |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| 72 | } |
| 73 | |
| 74 | @Override |
| 75 | public Object[] getElements(Object inputElement) { |
| 76 | if (inputElement instanceof ITmfTreeViewerEntry) { |
| 77 | return ((ITmfTreeViewerEntry) inputElement).getChildren().toArray(new ITmfTreeViewerEntry[0]); |
| 78 | } |
| 79 | return new ITmfTreeViewerEntry[0]; |
| 80 | } |
| 81 | |
| 82 | @Override |
| 83 | public Object[] getChildren(Object parentElement) { |
| 84 | ITmfTreeViewerEntry entry = (ITmfTreeViewerEntry) parentElement; |
| 85 | List<? extends ITmfTreeViewerEntry> children = entry.getChildren(); |
| 86 | return children.toArray(new ITmfTreeViewerEntry[children.size()]); |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public Object getParent(Object element) { |
| 91 | ITmfTreeViewerEntry entry = (ITmfTreeViewerEntry) element; |
| 92 | return entry.getParent(); |
| 93 | } |
| 94 | |
| 95 | @Override |
| 96 | public boolean hasChildren(Object element) { |
| 97 | ITmfTreeViewerEntry entry = (ITmfTreeViewerEntry) element; |
| 98 | return entry.hasChildren(); |
| 99 | } |
| 100 | |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Base class to provide the labels for the tree viewer. Views extending |
| 105 | * this class typically need to override the getColumnText method if they |
| 106 | * have more than one column to display. It also allows to change the font |
| 107 | * and colors of the cells. |
| 108 | */ |
| 109 | protected static class TreeLabelProvider implements ITableLabelProvider, ITableFontProvider, ITableColorProvider { |
| 110 | |
| 111 | @Override |
| 112 | public void addListener(ILabelProviderListener listener) { |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public void dispose() { |
| 117 | } |
| 118 | |
| 119 | @Override |
| 120 | public boolean isLabelProperty(Object element, String property) { |
| 121 | return false; |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public void removeListener(ILabelProviderListener listener) { |
| 126 | } |
| 127 | |
| 128 | @Override |
| 129 | public Image getColumnImage(Object element, int columnIndex) { |
| 130 | return null; |
| 131 | } |
| 132 | |
| 133 | @Override |
| 134 | public String getColumnText(Object element, int columnIndex) { |
| 135 | if ((element instanceof ITmfTreeViewerEntry) && (columnIndex == 0)) { |
| 136 | ITmfTreeViewerEntry entry = (ITmfTreeViewerEntry) element; |
| 137 | return entry.getName(); |
| 138 | } |
| 139 | return new String(); |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | public Color getForeground(Object element, int columnIndex) { |
| 144 | return Display.getCurrent().getSystemColor(SWT.COLOR_LIST_FOREGROUND); |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | public Color getBackground(Object element, int columnIndex) { |
| 149 | return Display.getCurrent().getSystemColor(SWT.COLOR_LIST_BACKGROUND); |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public Font getFont(Object element, int columnIndex) { |
| 154 | return null; |
| 155 | } |
| 156 | |
| 157 | } |
| 158 | |
| 159 | // ------------------------------------------------------------------------ |
| 160 | // Constructors and initialization methods |
| 161 | // ------------------------------------------------------------------------ |
| 162 | |
| 163 | /** |
| 164 | * Constructor |
| 165 | * |
| 166 | * @param parent |
| 167 | * The parent composite that holds this viewer |
| 168 | * @param allowMultiSelect |
| 169 | * Whether multiple selections are allowed |
| 170 | */ |
| 171 | public AbstractTmfTreeViewer(Composite parent, boolean allowMultiSelect) { |
| 172 | super(parent); |
| 173 | |
| 174 | int flags = SWT.FULL_SELECTION | SWT.H_SCROLL; |
| 175 | if (allowMultiSelect) { |
| 176 | flags |= SWT.MULTI; |
| 177 | } |
| 178 | |
| 179 | /* Build the tree viewer part of the view */ |
| 180 | fTreeViewer = new TreeViewer(parent, flags); |
| 181 | fTreeViewer.setAutoExpandLevel(AbstractTreeViewer.ALL_LEVELS); |
| 182 | final Tree tree = fTreeViewer.getTree(); |
| 183 | tree.setHeaderVisible(true); |
| 184 | tree.setLinesVisible(true); |
| 185 | fTreeViewer.setContentProvider(new TreeContentProvider()); |
| 186 | fTreeViewer.setLabelProvider(new TreeLabelProvider()); |
| 187 | List<TmfTreeColumnData> columns = getColumnDataProvider().getColumnData(); |
| 188 | this.setTreeColumns(columns); |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Get the column data provider that will contain the list of columns to be |
| 193 | * part of this viewer. It is called once during the constructor. |
| 194 | * |
| 195 | * @return The tree column data provider for this viewer. |
| 196 | */ |
| 197 | protected abstract ITmfTreeColumnDataProvider getColumnDataProvider(); |
| 198 | |
| 199 | /** |
| 200 | * Sets the tree columns for this tree viewer |
| 201 | * |
| 202 | * @param columns |
| 203 | * The tree column data |
| 204 | */ |
| 205 | public void setTreeColumns(final List<TmfTreeColumnData> columns) { |
| 206 | boolean hasPercentProvider = false; |
| 207 | for (final TmfTreeColumnData columnData : columns) { |
| 208 | columnData.createColumn(fTreeViewer); |
| 209 | hasPercentProvider |= (columnData.getPercentageProvider() != null); |
| 210 | } |
| 211 | |
| 212 | if (hasPercentProvider) { |
| 213 | /* |
| 214 | * Handler that will draw bar charts in the cell using a percentage |
| 215 | * value. |
| 216 | */ |
| 217 | fTreeViewer.getTree().addListener(SWT.EraseItem, new Listener() { |
| 218 | @Override |
| 219 | public void handleEvent(Event event) { |
| 220 | if (columns.get(event.index).getPercentageProvider() != null) { |
| 221 | |
| 222 | double percentage = columns.get(event.index).getPercentageProvider().getPercentage(event.item.getData()); |
| 223 | if (percentage == 0) { // No bar to draw |
| 224 | return; |
| 225 | } |
| 226 | |
| 227 | if ((event.detail & SWT.SELECTED) > 0) { |
| 228 | /* |
| 229 | * The item is selected. Draw our own background to |
| 230 | * avoid overwriting the bar. |
| 231 | */ |
| 232 | event.gc.fillRectangle(event.x, event.y, event.width, event.height); |
| 233 | event.detail &= ~SWT.SELECTED; |
| 234 | } |
| 235 | |
| 236 | int barWidth = (int) ((fTreeViewer.getTree().getColumn(event.index).getWidth() - 8) * percentage); |
| 237 | int oldAlpha = event.gc.getAlpha(); |
| 238 | Color oldForeground = event.gc.getForeground(); |
| 239 | Color oldBackground = event.gc.getBackground(); |
| 240 | /* |
| 241 | * Draws a transparent gradient rectangle from the color |
| 242 | * of foreground and background. |
| 243 | */ |
| 244 | event.gc.setAlpha(64); |
| 245 | event.gc.setForeground(event.item.getDisplay().getSystemColor(SWT.COLOR_BLUE)); |
| 246 | event.gc.setBackground(event.item.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND)); |
| 247 | event.gc.fillGradientRectangle(event.x, event.y, barWidth, event.height, true); |
| 248 | event.gc.drawRectangle(event.x, event.y, barWidth, event.height); |
| 249 | /* Restores old values */ |
| 250 | event.gc.setForeground(oldForeground); |
| 251 | event.gc.setBackground(oldBackground); |
| 252 | event.gc.setAlpha(oldAlpha); |
| 253 | event.detail &= ~SWT.BACKGROUND; |
| 254 | } |
| 255 | } |
| 256 | }); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Set the label provider that will fill the columns of the tree viewer |
| 262 | * |
| 263 | * @param labelProvider |
| 264 | * The label provider to fill the columns |
| 265 | */ |
| 266 | protected void setLabelProvider(IBaseLabelProvider labelProvider) { |
| 267 | fTreeViewer.setLabelProvider(labelProvider); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Get the tree viewer object |
| 272 | * |
| 273 | * @return The tree viewer object displayed by this viewer |
| 274 | */ |
| 275 | protected TreeViewer getTreeViewer() { |
| 276 | return fTreeViewer; |
| 277 | } |
| 278 | |
| 279 | // ------------------------------------------------------------------------ |
| 280 | // ITmfViewer |
| 281 | // ------------------------------------------------------------------------ |
| 282 | |
| 283 | @Override |
| 284 | public Control getControl() { |
| 285 | return fTreeViewer.getControl(); |
| 286 | } |
| 287 | |
| 288 | @Override |
| 289 | public void refresh() { |
| 290 | Tree tree = fTreeViewer.getTree(); |
| 291 | tree.setRedraw(false); |
| 292 | fTreeViewer.refresh(); |
| 293 | fTreeViewer.expandAll(); |
| 294 | tree.setRedraw(true); |
| 295 | } |
| 296 | |
| 297 | @Override |
| 298 | public void loadTrace(ITmfTrace trace) { |
| 299 | super.loadTrace(trace); |
| 300 | Thread thread = new Thread() { |
| 301 | @Override |
| 302 | public void run() { |
| 303 | initializeDataSource(); |
| 304 | Display.getDefault().asyncExec(new Runnable() { |
| 305 | @Override |
| 306 | public void run() { |
| 307 | clearContent(); |
| 308 | updateContent(getWindowStartTime(), getWindowEndTime(), false); |
| 309 | } |
| 310 | }); |
| 311 | } |
| 312 | }; |
| 313 | thread.start(); |
| 314 | } |
| 315 | |
| 316 | // ------------------------------------------------------------------------ |
| 317 | // Operations |
| 318 | // ------------------------------------------------------------------------ |
| 319 | |
| 320 | /** |
| 321 | * Add a selection listener to the tree viewer. This will be called when the |
| 322 | * selection changes and contain all the selected items. |
| 323 | * |
| 324 | * The selection change listener can be used like this: |
| 325 | * |
| 326 | * <pre> |
| 327 | * getTreeViewer().addSelectionChangeListener(new ISelectionChangedListener() { |
| 328 | * @Override |
| 329 | * public void selectionChanged(SelectionChangedEvent event) { |
| 330 | * if (event.getSelection() instanceof IStructuredSelection) { |
| 331 | * Object selection = ((IStructuredSelection) event.getSelection()).getFirstElement(); |
| 332 | * if (selection instanceof ITmfTreeViewerEntry) { |
| 333 | * // Do something |
| 334 | * } |
| 335 | * } |
| 336 | * } |
| 337 | * }); |
| 338 | * </pre> |
| 339 | * |
| 340 | * @param listener |
| 341 | * The {@link ISelectionChangedListener} |
| 342 | */ |
| 343 | public void addSelectionChangeListener(ISelectionChangedListener listener) { |
| 344 | fTreeViewer.addSelectionChangedListener(listener); |
| 345 | } |
| 346 | |
| 347 | /** |
| 348 | * Method called when the trace is loaded, to initialize any data once the |
| 349 | * trace has been set, but before the first call to update the content of |
| 350 | * the viewer. |
| 351 | */ |
| 352 | protected void initializeDataSource() { |
| 353 | |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * Clears the current content of the viewer. |
| 358 | */ |
| 359 | protected void clearContent() { |
| 360 | fTreeViewer.setInput(null); |
| 361 | } |
| 362 | |
| 363 | /** |
| 364 | * Requests an update of the viewer's content in a given time range or |
| 365 | * selection time range. An extra parameter defines whether these times |
| 366 | * correspond to the selection or the visible range, as the viewer may |
| 367 | * update differently in those cases. |
| 368 | * |
| 369 | * @param start |
| 370 | * The start time of the requested content |
| 371 | * @param end |
| 372 | * The end time of the requested content |
| 373 | * @param isSelection |
| 374 | * <code>true</code> if this time range is for a selection, |
| 375 | * <code>false</code> for the visible time range |
| 376 | */ |
| 377 | protected void updateContent(final long start, final long end, final boolean isSelection) { |
| 378 | Thread thread = new Thread() { |
| 379 | @Override |
| 380 | public void run() { |
| 381 | final ITmfTreeViewerEntry rootEntry = updateElements(start, end, isSelection); |
| 382 | /* Set the input in main thread only if it didn't change */ |
| 383 | if (rootEntry != null) { |
| 384 | Display.getDefault().asyncExec(new Runnable() { |
| 385 | @Override |
| 386 | public void run() { |
| 387 | if (rootEntry != fTreeViewer.getInput()) { |
| 388 | fTreeViewer.setInput(rootEntry); |
| 389 | } else { |
| 390 | fTreeViewer.refresh(); |
| 391 | } |
| 392 | // FIXME should add a bit of padding |
| 393 | for (TreeColumn column : fTreeViewer.getTree().getColumns()) { |
| 394 | column.pack(); |
| 395 | } |
| 396 | } |
| 397 | }); |
| 398 | } |
| 399 | } |
| 400 | }; |
| 401 | thread.start(); |
| 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Update the entries to the given start/end time. An extra parameter |
| 406 | * defines whether these times correspond to the selection or the visible |
| 407 | * range, as the viewer may update differently in those cases. This methods |
| 408 | * returns a root node that is not meant to be visible. The children of this |
| 409 | * 'fake' root node are the first level of entries that will appear in the |
| 410 | * tree. If no update is necessary, the method should return |
| 411 | * <code>null</code>. To empty the tree, a root node containing an empty |
| 412 | * list of children should be returned. |
| 413 | * |
| 414 | * This method is not called in the UI thread when using the default viewer |
| 415 | * content update. Resource-intensive calculations here should not block the |
| 416 | * UI. |
| 417 | * |
| 418 | * @param start |
| 419 | * The start time of the requested content |
| 420 | * @param end |
| 421 | * The end time of the requested content |
| 422 | * @param isSelection |
| 423 | * <code>true</code> if this time range is for a selection, |
| 424 | * <code>false</code> for the visible time range |
| 425 | * @return The root entry of the list of entries to display or |
| 426 | * <code>null</code> if no update necessary |
| 427 | */ |
| 428 | protected abstract ITmfTreeViewerEntry updateElements(long start, long end, boolean isSelection); |
| 429 | |
| 430 | /** |
| 431 | * Get the current input displayed by the viewer |
| 432 | * |
| 433 | * @return The input of the tree viewer, the root entry |
| 434 | */ |
| 435 | protected ITmfTreeViewerEntry getInput() { |
| 436 | return (ITmfTreeViewerEntry) fTreeViewer.getInput(); |
| 437 | } |
| 438 | |
| 439 | // ------------------------------------------------------------------------ |
| 440 | // Signal Handler |
| 441 | // ------------------------------------------------------------------------ |
| 442 | |
| 443 | /** |
| 444 | * Signal handler for handling of the time synch signal. The times |
| 445 | * correspond to the selection by the user, not the visible time range. |
| 446 | * |
| 447 | * @param signal |
| 448 | * The time synch signal {@link TmfTimeSynchSignal} |
| 449 | */ |
| 450 | @Override |
| 451 | @TmfSignalHandler |
| 452 | public void selectionRangeUpdated(TmfTimeSynchSignal signal) { |
| 453 | super.selectionRangeUpdated(signal); |
| 454 | if ((signal.getSource() != this) && (getTrace() != null)) { |
| 455 | updateContent(this.getSelectionBeginTime(), this.getSelectionEndTime(), true); |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | /** |
| 460 | * Signal handler for handling of the time range synch signal. This time |
| 461 | * range is the visible zone of the view. |
| 462 | * |
| 463 | * @param signal |
| 464 | * The time range synch signal {@link TmfRangeSynchSignal} |
| 465 | */ |
| 466 | @Override |
| 467 | @TmfSignalHandler |
| 468 | public void timeRangeUpdated(TmfRangeSynchSignal signal) { |
| 469 | super.timeRangeUpdated(signal); |
| 470 | updateContent(this.getWindowStartTime(), this.getWindowEndTime(), false); |
| 471 | } |
| 472 | |
| 473 | @Override |
| 474 | public void reset() { |
| 475 | super.reset(); |
| 476 | clearContent(); |
| 477 | } |
| 478 | |
| 479 | } |