| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2011, 2013 Ericsson |
| 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 | * Francois Chouinard - Initial API and implementation |
| 11 | * Bernd Hufmann - Changed to updated histogram data model |
| 12 | * Francois Chouinard - Reformat histogram labels on format change |
| 13 | *******************************************************************************/ |
| 14 | |
| 15 | package org.eclipse.linuxtools.tmf.ui.views.histogram; |
| 16 | |
| 17 | import org.eclipse.linuxtools.tmf.core.signal.TmfSignalHandler; |
| 18 | import org.eclipse.linuxtools.tmf.core.signal.TmfSignalManager; |
| 19 | import org.eclipse.linuxtools.tmf.core.signal.TmfTimestampFormatUpdateSignal; |
| 20 | import org.eclipse.linuxtools.tmf.core.timestamp.ITmfTimestamp; |
| 21 | import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestamp; |
| 22 | import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestampFormat; |
| 23 | import org.eclipse.linuxtools.tmf.ui.views.TmfView; |
| 24 | import org.eclipse.swt.SWT; |
| 25 | import org.eclipse.swt.events.ControlEvent; |
| 26 | import org.eclipse.swt.events.ControlListener; |
| 27 | import org.eclipse.swt.events.KeyEvent; |
| 28 | import org.eclipse.swt.events.KeyListener; |
| 29 | import org.eclipse.swt.events.MouseEvent; |
| 30 | import org.eclipse.swt.events.MouseListener; |
| 31 | import org.eclipse.swt.events.MouseTrackListener; |
| 32 | import org.eclipse.swt.events.PaintEvent; |
| 33 | import org.eclipse.swt.events.PaintListener; |
| 34 | import org.eclipse.swt.graphics.Color; |
| 35 | import org.eclipse.swt.graphics.Font; |
| 36 | import org.eclipse.swt.graphics.FontData; |
| 37 | import org.eclipse.swt.graphics.GC; |
| 38 | import org.eclipse.swt.graphics.Image; |
| 39 | import org.eclipse.swt.layout.FillLayout; |
| 40 | import org.eclipse.swt.layout.GridData; |
| 41 | import org.eclipse.swt.layout.GridLayout; |
| 42 | import org.eclipse.swt.widgets.Canvas; |
| 43 | import org.eclipse.swt.widgets.Composite; |
| 44 | import org.eclipse.swt.widgets.Display; |
| 45 | import org.eclipse.swt.widgets.Text; |
| 46 | |
| 47 | /** |
| 48 | * Re-usable histogram widget. |
| 49 | * |
| 50 | * It has the following features: |
| 51 | * <ul> |
| 52 | * <li>Y-axis labels displaying min/max count values |
| 53 | * <li>X-axis labels displaying time range |
| 54 | * <li>a histogram displaying the distribution of values over time (note that |
| 55 | * the histogram might not necessarily fill the whole canvas) |
| 56 | * </ul> |
| 57 | * The widget also has 2 'markers' to identify: |
| 58 | * <ul> |
| 59 | * <li>a red dashed line over the bar that contains the currently selected event |
| 60 | * <li>a dark red dashed line that delimits the right end of the histogram (if |
| 61 | * it doesn't fill the canvas) |
| 62 | * </ul> |
| 63 | * Clicking on the histogram will select the current event at the mouse |
| 64 | * location. |
| 65 | * <p> |
| 66 | * Once the histogram is selected, there is some limited keyboard support: |
| 67 | * <ul> |
| 68 | * <li>Home: go to the first histogram bar |
| 69 | * <li>End: go to the last histogram bar |
| 70 | * <li>Left: go to the previous histogram |
| 71 | * <li>Right: go to the next histogram bar |
| 72 | * </ul> |
| 73 | * Finally, when the mouse hovers over the histogram, a tool tip showing the |
| 74 | * following information about the corresponding histogram bar time range: |
| 75 | * <ul> |
| 76 | * <li>start of the time range |
| 77 | * <li>end of the time range |
| 78 | * <li>number of events in that time range |
| 79 | * </ul> |
| 80 | * |
| 81 | * @version 1.1 |
| 82 | * @author Francois Chouinard |
| 83 | */ |
| 84 | public abstract class Histogram implements ControlListener, PaintListener, KeyListener, MouseListener, MouseTrackListener, IHistogramModelListener { |
| 85 | |
| 86 | // ------------------------------------------------------------------------ |
| 87 | // Constants |
| 88 | // ------------------------------------------------------------------------ |
| 89 | |
| 90 | // Histogram colors |
| 91 | private final Color fBackgroundColor = Display.getCurrent().getSystemColor(SWT.COLOR_WHITE); |
| 92 | private final Color fCurrentEventColor = Display.getCurrent().getSystemColor(SWT.COLOR_RED); |
| 93 | private final Color fLastEventColor = Display.getCurrent().getSystemColor(SWT.COLOR_DARK_RED); |
| 94 | private final Color fHistoBarColor = new Color(Display.getDefault(), 74, 112, 139); |
| 95 | |
| 96 | // ------------------------------------------------------------------------ |
| 97 | // Attributes |
| 98 | // ------------------------------------------------------------------------ |
| 99 | |
| 100 | /** |
| 101 | * The parent TMF view. |
| 102 | */ |
| 103 | protected TmfView fParentView; |
| 104 | |
| 105 | private Composite fComposite; |
| 106 | private Font fFont; |
| 107 | |
| 108 | // Histogram text fields |
| 109 | private Text fMaxNbEventsText; |
| 110 | private Text fMinNbEventsText; |
| 111 | private Text fTimeRangeStartText; |
| 112 | private Text fTimeRangeEndText; |
| 113 | |
| 114 | /** |
| 115 | * Histogram drawing area |
| 116 | */ |
| 117 | protected Canvas fCanvas; |
| 118 | |
| 119 | /** |
| 120 | * The histogram data model. |
| 121 | */ |
| 122 | protected final HistogramDataModel fDataModel; |
| 123 | |
| 124 | /** |
| 125 | * The histogram data model scaled to current resolution and screen width. |
| 126 | */ |
| 127 | protected HistogramScaledData fScaledData; |
| 128 | |
| 129 | /** |
| 130 | * The current event value |
| 131 | */ |
| 132 | protected long fCurrentEventTime = 0L; |
| 133 | |
| 134 | // ------------------------------------------------------------------------ |
| 135 | // Construction |
| 136 | // ------------------------------------------------------------------------ |
| 137 | |
| 138 | /** |
| 139 | * Full constructor. |
| 140 | * |
| 141 | * @param view A reference to the parent TMF view. |
| 142 | * @param parent A parent composite |
| 143 | */ |
| 144 | public Histogram(final TmfView view, final Composite parent) { |
| 145 | fParentView = view; |
| 146 | |
| 147 | fComposite = createWidget(parent); |
| 148 | fDataModel = new HistogramDataModel(); |
| 149 | fDataModel.addHistogramListener(this); |
| 150 | clear(); |
| 151 | |
| 152 | fCanvas.addControlListener(this); |
| 153 | fCanvas.addPaintListener(this); |
| 154 | fCanvas.addKeyListener(this); |
| 155 | fCanvas.addMouseListener(this); |
| 156 | fCanvas.addMouseTrackListener(this); |
| 157 | |
| 158 | TmfSignalManager.register(this); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Dispose resources and unregisters listeners. |
| 163 | */ |
| 164 | public void dispose() { |
| 165 | TmfSignalManager.deregister(this); |
| 166 | |
| 167 | fHistoBarColor.dispose(); |
| 168 | fDataModel.removeHistogramListener(this); |
| 169 | } |
| 170 | |
| 171 | private Composite createWidget(final Composite parent) { |
| 172 | |
| 173 | final Color labelColor = parent.getBackground(); |
| 174 | fFont = adjustFont(parent); |
| 175 | |
| 176 | final int initalWidth = 10; |
| 177 | |
| 178 | // -------------------------------------------------------------------- |
| 179 | // Define the histogram |
| 180 | // -------------------------------------------------------------------- |
| 181 | |
| 182 | final GridLayout gridLayout = new GridLayout(); |
| 183 | gridLayout.numColumns = 3; |
| 184 | gridLayout.marginHeight = 0; |
| 185 | gridLayout.marginWidth = 0; |
| 186 | gridLayout.marginTop = 0; |
| 187 | gridLayout.horizontalSpacing = 0; |
| 188 | gridLayout.verticalSpacing = 0; |
| 189 | gridLayout.marginLeft = 0; |
| 190 | gridLayout.marginRight = 0; |
| 191 | final Composite composite = new Composite(parent, SWT.FILL); |
| 192 | composite.setLayout(gridLayout); |
| 193 | |
| 194 | // Use all the horizontal space |
| 195 | GridData gridData = new GridData(); |
| 196 | gridData.horizontalAlignment = SWT.FILL; |
| 197 | gridData.verticalAlignment = SWT.FILL; |
| 198 | gridData.grabExcessHorizontalSpace = true; |
| 199 | composite.setLayoutData(gridData); |
| 200 | |
| 201 | // Y-axis max event |
| 202 | gridData = new GridData(); |
| 203 | gridData.horizontalAlignment = SWT.RIGHT; |
| 204 | gridData.verticalAlignment = SWT.TOP; |
| 205 | fMaxNbEventsText = new Text(composite, SWT.READ_ONLY | SWT.RIGHT); |
| 206 | fMaxNbEventsText.setFont(fFont); |
| 207 | fMaxNbEventsText.setBackground(labelColor); |
| 208 | fMaxNbEventsText.setEditable(false); |
| 209 | fMaxNbEventsText.setText("0"); //$NON-NLS-1$ |
| 210 | fMaxNbEventsText.setLayoutData(gridData); |
| 211 | |
| 212 | // Histogram itself |
| 213 | Composite canvasComposite = new Composite(composite, SWT.BORDER); |
| 214 | gridData = new GridData(); |
| 215 | gridData.horizontalSpan = 2; |
| 216 | gridData.verticalSpan = 2; |
| 217 | gridData.horizontalAlignment = SWT.FILL; |
| 218 | gridData.verticalAlignment = SWT.FILL; |
| 219 | gridData.grabExcessHorizontalSpace = true; |
| 220 | canvasComposite.setLayoutData(gridData); |
| 221 | canvasComposite.setLayout(new FillLayout()); |
| 222 | fCanvas = new Canvas(canvasComposite, SWT.DOUBLE_BUFFERED); |
| 223 | |
| 224 | // Y-axis min event (always 0...) |
| 225 | gridData = new GridData(); |
| 226 | gridData.horizontalAlignment = SWT.RIGHT; |
| 227 | gridData.verticalAlignment = SWT.BOTTOM; |
| 228 | fMinNbEventsText = new Text(composite, SWT.READ_ONLY | SWT.RIGHT); |
| 229 | fMinNbEventsText.setFont(fFont); |
| 230 | fMinNbEventsText.setBackground(labelColor); |
| 231 | fMinNbEventsText.setEditable(false); |
| 232 | fMinNbEventsText.setText("0"); //$NON-NLS-1$ |
| 233 | fMinNbEventsText.setLayoutData(gridData); |
| 234 | |
| 235 | // Dummy cell |
| 236 | gridData = new GridData(initalWidth, SWT.DEFAULT); |
| 237 | gridData.horizontalAlignment = SWT.RIGHT; |
| 238 | gridData.verticalAlignment = SWT.BOTTOM; |
| 239 | final Text dummyText = new Text(composite, SWT.READ_ONLY); |
| 240 | dummyText.setFont(fFont); |
| 241 | dummyText.setBackground(labelColor); |
| 242 | dummyText.setEditable(false); |
| 243 | dummyText.setText(""); //$NON-NLS-1$ |
| 244 | dummyText.setLayoutData(gridData); |
| 245 | |
| 246 | // Window range start time |
| 247 | gridData = new GridData(); |
| 248 | gridData.horizontalAlignment = SWT.LEFT; |
| 249 | gridData.verticalAlignment = SWT.BOTTOM; |
| 250 | fTimeRangeStartText = new Text(composite, SWT.READ_ONLY); |
| 251 | fTimeRangeStartText.setFont(fFont); |
| 252 | fTimeRangeStartText.setBackground(labelColor); |
| 253 | fTimeRangeStartText.setLayoutData(gridData); |
| 254 | |
| 255 | // Window range end time |
| 256 | gridData = new GridData(); |
| 257 | gridData.horizontalAlignment = SWT.RIGHT; |
| 258 | gridData.verticalAlignment = SWT.BOTTOM; |
| 259 | fTimeRangeEndText = new Text(composite, SWT.READ_ONLY); |
| 260 | fTimeRangeEndText.setFont(fFont); |
| 261 | fTimeRangeEndText.setBackground(labelColor); |
| 262 | fTimeRangeEndText.setLayoutData(gridData); |
| 263 | |
| 264 | return composite; |
| 265 | } |
| 266 | |
| 267 | private static Font adjustFont(final Composite composite) { |
| 268 | // Reduce font size for a more pleasing rendering |
| 269 | final int fontSizeAdjustment = -2; |
| 270 | final Font font = composite.getFont(); |
| 271 | final FontData fontData = font.getFontData()[0]; |
| 272 | return new Font(font.getDevice(), fontData.getName(), fontData.getHeight() + fontSizeAdjustment, fontData.getStyle()); |
| 273 | } |
| 274 | |
| 275 | // ------------------------------------------------------------------------ |
| 276 | // Accessors |
| 277 | // ------------------------------------------------------------------------ |
| 278 | |
| 279 | /** |
| 280 | * Returns the start time (equal first bucket time) |
| 281 | * @return the start time. |
| 282 | */ |
| 283 | public long getStartTime() { |
| 284 | return fDataModel.getFirstBucketTime(); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Returns the end time. |
| 289 | * @return the end time. |
| 290 | */ |
| 291 | public long getEndTime() { |
| 292 | return fDataModel.getEndTime(); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Returns the time limit (end of last bucket) |
| 297 | * @return the time limit. |
| 298 | */ |
| 299 | public long getTimeLimit() { |
| 300 | return fDataModel.getTimeLimit(); |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * Returns a data model reference. |
| 305 | * @return data model. |
| 306 | */ |
| 307 | public HistogramDataModel getDataModel() { |
| 308 | return fDataModel; |
| 309 | } |
| 310 | |
| 311 | // ------------------------------------------------------------------------ |
| 312 | // Operations |
| 313 | // ------------------------------------------------------------------------ |
| 314 | /** |
| 315 | * Updates the time range. |
| 316 | * @param startTime A start time |
| 317 | * @param endTime A end time. |
| 318 | */ |
| 319 | public abstract void updateTimeRange(long startTime, long endTime); |
| 320 | |
| 321 | /** |
| 322 | * Clear the histogram and reset the data |
| 323 | */ |
| 324 | public void clear() { |
| 325 | fDataModel.clear(); |
| 326 | synchronized (fDataModel) { |
| 327 | fScaledData = null; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * Increase the histogram bucket corresponding to [timestamp] |
| 333 | * |
| 334 | * @param eventCount |
| 335 | * The new event count |
| 336 | * @param timestamp |
| 337 | * The latest timestamp |
| 338 | */ |
| 339 | public void countEvent(final long eventCount, final long timestamp) { |
| 340 | fDataModel.countEvent(eventCount, timestamp); |
| 341 | } |
| 342 | |
| 343 | /** |
| 344 | * Sets the current event time and refresh the display |
| 345 | * |
| 346 | * @param timestamp |
| 347 | * The time of the current event |
| 348 | */ |
| 349 | public void setCurrentEvent(final long timestamp) { |
| 350 | fCurrentEventTime = (timestamp > 0) ? timestamp : 0; |
| 351 | fDataModel.setCurrentEventNotifyListeners(timestamp); |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * Computes the timestamp of the bucket at [offset] |
| 356 | * |
| 357 | * @param offset offset from the left on the histogram |
| 358 | * @return the start timestamp of the corresponding bucket |
| 359 | */ |
| 360 | public synchronized long getTimestamp(final int offset) { |
| 361 | assert offset > 0 && offset < fScaledData.fWidth; |
| 362 | try { |
| 363 | return fDataModel.getFirstBucketTime() + fScaledData.fBucketDuration * offset; |
| 364 | } catch (final Exception e) { |
| 365 | return 0; // TODO: Fix that racing condition (NPE) |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Computes the offset of the timestamp in the histogram |
| 371 | * |
| 372 | * @param timestamp the timestamp |
| 373 | * @return the offset of the corresponding bucket (-1 if invalid) |
| 374 | */ |
| 375 | public synchronized int getOffset(final long timestamp) { |
| 376 | if (timestamp < fDataModel.getFirstBucketTime() || timestamp > fDataModel.getEndTime()) { |
| 377 | return -1; |
| 378 | } |
| 379 | return (int) ((timestamp - fDataModel.getFirstBucketTime()) / fScaledData.fBucketDuration); |
| 380 | } |
| 381 | |
| 382 | /** |
| 383 | * Move the currently selected bar cursor to a non-empty bucket. |
| 384 | * |
| 385 | * @param keyCode the SWT key code |
| 386 | */ |
| 387 | protected void moveCursor(final int keyCode) { |
| 388 | |
| 389 | if (fScaledData.fCurrentBucket == HistogramScaledData.OUT_OF_RANGE_BUCKET) { |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | int index; |
| 394 | switch (keyCode) { |
| 395 | |
| 396 | case SWT.HOME: |
| 397 | index = 0; |
| 398 | while (index < fScaledData.fLastBucket && fScaledData.fData[index] == 0) { |
| 399 | index++; |
| 400 | } |
| 401 | if (index < fScaledData.fLastBucket) { |
| 402 | fScaledData.fCurrentBucket = index; |
| 403 | } |
| 404 | break; |
| 405 | |
| 406 | case SWT.ARROW_RIGHT: |
| 407 | index = fScaledData.fCurrentBucket + 1; |
| 408 | while (index < fScaledData.fWidth && fScaledData.fData[index] == 0) { |
| 409 | index++; |
| 410 | } |
| 411 | if (index < fScaledData.fLastBucket) { |
| 412 | fScaledData.fCurrentBucket = index; |
| 413 | } |
| 414 | break; |
| 415 | |
| 416 | case SWT.END: |
| 417 | index = fScaledData.fLastBucket; |
| 418 | while (index >= 0 && fScaledData.fData[index] == 0) { |
| 419 | index--; |
| 420 | } |
| 421 | if (index >= 0) { |
| 422 | fScaledData.fCurrentBucket = index; |
| 423 | } |
| 424 | break; |
| 425 | |
| 426 | case SWT.ARROW_LEFT: |
| 427 | index = fScaledData.fCurrentBucket - 1; |
| 428 | while (index >= 0 && fScaledData.fData[index] == 0) { |
| 429 | index--; |
| 430 | } |
| 431 | if (index >= 0) { |
| 432 | fScaledData.fCurrentBucket = index; |
| 433 | } |
| 434 | break; |
| 435 | |
| 436 | default: |
| 437 | return; |
| 438 | } |
| 439 | |
| 440 | updateCurrentEventTime(); |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * Refresh the histogram display |
| 445 | */ |
| 446 | @Override |
| 447 | public void modelUpdated() { |
| 448 | if (!fCanvas.isDisposed() && fCanvas.getDisplay() != null) { |
| 449 | fCanvas.getDisplay().asyncExec(new Runnable() { |
| 450 | @Override |
| 451 | public void run() { |
| 452 | if (!fCanvas.isDisposed()) { |
| 453 | // Retrieve and normalize the data |
| 454 | final int canvasWidth = fCanvas.getBounds().width; |
| 455 | final int canvasHeight = fCanvas.getBounds().height; |
| 456 | if (canvasWidth <= 0 || canvasHeight <= 0) { |
| 457 | return; |
| 458 | } |
| 459 | fDataModel.setCurrentEvent(fCurrentEventTime); |
| 460 | fScaledData = fDataModel.scaleTo(canvasWidth, canvasHeight, 1); |
| 461 | synchronized(fDataModel) { |
| 462 | if (fScaledData != null) { |
| 463 | fCanvas.redraw(); |
| 464 | if (fDataModel.getNbEvents() != 0) { |
| 465 | // Display histogram and update X-,Y-axis labels |
| 466 | fTimeRangeStartText.setText(TmfTimestampFormat.getDefaulTimeFormat().format(fDataModel.getFirstBucketTime())); |
| 467 | fTimeRangeEndText.setText(TmfTimestampFormat.getDefaulTimeFormat().format(fDataModel.getEndTime())); |
| 468 | } else { |
| 469 | fTimeRangeStartText.setText(""); //$NON-NLS-1$ |
| 470 | fTimeRangeEndText.setText(""); //$NON-NLS-1$ |
| 471 | } |
| 472 | fMaxNbEventsText.setText(Long.toString(fScaledData.fMaxValue)); |
| 473 | // The Y-axis area might need to be re-sized |
| 474 | fMaxNbEventsText.getParent().layout(); |
| 475 | } |
| 476 | } |
| 477 | } |
| 478 | } |
| 479 | }); |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | // ------------------------------------------------------------------------ |
| 484 | // Helper functions |
| 485 | // ------------------------------------------------------------------------ |
| 486 | |
| 487 | private void updateCurrentEventTime() { |
| 488 | final long bucketStartTime = getTimestamp(fScaledData.fCurrentBucket); |
| 489 | ((HistogramView) fParentView).updateCurrentEventTime(bucketStartTime); |
| 490 | } |
| 491 | |
| 492 | // ------------------------------------------------------------------------ |
| 493 | // PaintListener |
| 494 | // ------------------------------------------------------------------------ |
| 495 | /** |
| 496 | * Image key string for the canvas. |
| 497 | */ |
| 498 | protected final String IMAGE_KEY = "double-buffer-image"; //$NON-NLS-1$ |
| 499 | |
| 500 | @Override |
| 501 | public void paintControl(final PaintEvent event) { |
| 502 | |
| 503 | // Get the geometry |
| 504 | final int canvasWidth = fCanvas.getBounds().width; |
| 505 | final int canvasHeight = fCanvas.getBounds().height; |
| 506 | |
| 507 | // Make sure we have something to draw upon |
| 508 | if (canvasWidth <= 0 || canvasHeight <= 0) { |
| 509 | return; |
| 510 | } |
| 511 | |
| 512 | // Retrieve image; re-create only if necessary |
| 513 | Image image = (Image) fCanvas.getData(IMAGE_KEY); |
| 514 | if (image == null || image.getBounds().width != canvasWidth || image.getBounds().height != canvasHeight) { |
| 515 | image = new Image(event.display, canvasWidth, canvasHeight); |
| 516 | fCanvas.setData(IMAGE_KEY, image); |
| 517 | } |
| 518 | |
| 519 | // Draw the histogram on its canvas |
| 520 | final GC imageGC = new GC(image); |
| 521 | formatImage(imageGC, image); |
| 522 | event.gc.drawImage(image, 0, 0); |
| 523 | imageGC.dispose(); |
| 524 | } |
| 525 | |
| 526 | private void formatImage(final GC imageGC, final Image image) { |
| 527 | |
| 528 | if (fScaledData == null) { |
| 529 | return; |
| 530 | } |
| 531 | |
| 532 | final HistogramScaledData scaledData = new HistogramScaledData(fScaledData); |
| 533 | |
| 534 | try { |
| 535 | // Get drawing boundaries |
| 536 | final int width = image.getBounds().width; |
| 537 | final int height = image.getBounds().height; |
| 538 | |
| 539 | // Clear the drawing area |
| 540 | imageGC.setBackground(fBackgroundColor); |
| 541 | imageGC.fillRectangle(0, 0, image.getBounds().width + 1, image.getBounds().height + 1); |
| 542 | |
| 543 | // Draw the histogram bars |
| 544 | imageGC.setBackground(fHistoBarColor); |
| 545 | final int limit = width < scaledData.fWidth ? width : scaledData.fWidth; |
| 546 | for (int i = 0; i < limit; i++) { |
| 547 | final int value = (int) Math.ceil(scaledData.fData[i] * scaledData.fScalingFactor); |
| 548 | imageGC.fillRectangle(i, height - value, 1, value); |
| 549 | } |
| 550 | |
| 551 | // Draw the current event bar |
| 552 | final int currentBucket = scaledData.fCurrentBucket; |
| 553 | if (currentBucket >= 0 && currentBucket < limit) { |
| 554 | drawDelimiter(imageGC, fCurrentEventColor, height, currentBucket); |
| 555 | } |
| 556 | |
| 557 | // Add a dashed line as a delimiter (at the right of the last bar) |
| 558 | int lastEventIndex = limit - 1; |
| 559 | while (lastEventIndex >= 0 && scaledData.fData[lastEventIndex] == 0) { |
| 560 | lastEventIndex--; |
| 561 | } |
| 562 | lastEventIndex += (lastEventIndex < limit - 1) ? 1 : 0; |
| 563 | drawDelimiter(imageGC, fLastEventColor, height, lastEventIndex); |
| 564 | } catch (final Exception e) { |
| 565 | // Do nothing |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | private static void drawDelimiter(final GC imageGC, final Color color, |
| 570 | final int height, final int index) { |
| 571 | imageGC.setBackground(color); |
| 572 | final int dash = height / 4; |
| 573 | imageGC.fillRectangle(index, 0 * dash, 1, dash - 1); |
| 574 | imageGC.fillRectangle(index, 1 * dash, 1, dash - 1); |
| 575 | imageGC.fillRectangle(index, 2 * dash, 1, dash - 1); |
| 576 | imageGC.fillRectangle(index, 3 * dash, 1, height - 3 * dash); |
| 577 | } |
| 578 | |
| 579 | // ------------------------------------------------------------------------ |
| 580 | // KeyListener |
| 581 | // ------------------------------------------------------------------------ |
| 582 | |
| 583 | @Override |
| 584 | public void keyPressed(final KeyEvent event) { |
| 585 | moveCursor(event.keyCode); |
| 586 | } |
| 587 | |
| 588 | @Override |
| 589 | public void keyReleased(final KeyEvent event) { |
| 590 | } |
| 591 | |
| 592 | // ------------------------------------------------------------------------ |
| 593 | // MouseListener |
| 594 | // ------------------------------------------------------------------------ |
| 595 | |
| 596 | @Override |
| 597 | public void mouseDoubleClick(final MouseEvent event) { |
| 598 | } |
| 599 | |
| 600 | @Override |
| 601 | public void mouseDown(final MouseEvent event) { |
| 602 | if (fDataModel.getNbEvents() > 0 && fScaledData.fLastBucket >= event.x) { |
| 603 | fScaledData.fCurrentBucket = event.x; |
| 604 | updateCurrentEventTime(); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | @Override |
| 609 | public void mouseUp(final MouseEvent event) { |
| 610 | } |
| 611 | |
| 612 | // ------------------------------------------------------------------------ |
| 613 | // MouseTrackListener |
| 614 | // ------------------------------------------------------------------------ |
| 615 | |
| 616 | @Override |
| 617 | public void mouseEnter(final MouseEvent event) { |
| 618 | } |
| 619 | |
| 620 | @Override |
| 621 | public void mouseExit(final MouseEvent event) { |
| 622 | } |
| 623 | |
| 624 | @Override |
| 625 | public void mouseHover(final MouseEvent event) { |
| 626 | if (fDataModel.getNbEvents() > 0 && fScaledData != null && fScaledData.fLastBucket >= event.x) { |
| 627 | final String tooltip = formatToolTipLabel(event.x); |
| 628 | fCanvas.setToolTipText(tooltip); |
| 629 | } else { |
| 630 | fCanvas.setToolTipText(null); |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | private String formatToolTipLabel(final int index) { |
| 635 | long startTime = fScaledData.getBucketStartTime(index); |
| 636 | // negative values are possible if time values came into the model in decreasing order |
| 637 | if (startTime < 0) { |
| 638 | startTime = 0; |
| 639 | } |
| 640 | final long endTime = fScaledData.getBucketEndTime(index); |
| 641 | final int nbEvents = (index >= 0) ? fScaledData.fData[index] : 0; |
| 642 | |
| 643 | final StringBuffer buffer = new StringBuffer(); |
| 644 | buffer.append("Range = ["); //$NON-NLS-1$ |
| 645 | buffer.append(new TmfTimestamp(startTime, ITmfTimestamp.NANOSECOND_SCALE).toString()); |
| 646 | buffer.append(","); //$NON-NLS-1$ |
| 647 | buffer.append(new TmfTimestamp(endTime, ITmfTimestamp.NANOSECOND_SCALE).toString()); |
| 648 | buffer.append(")\n"); //$NON-NLS-1$ |
| 649 | buffer.append("Event count = "); //$NON-NLS-1$ |
| 650 | buffer.append(nbEvents); |
| 651 | return buffer.toString(); |
| 652 | } |
| 653 | |
| 654 | // ------------------------------------------------------------------------ |
| 655 | // ControlListener |
| 656 | // ------------------------------------------------------------------------ |
| 657 | |
| 658 | @Override |
| 659 | public void controlMoved(final ControlEvent event) { |
| 660 | fDataModel.complete(); |
| 661 | } |
| 662 | |
| 663 | @Override |
| 664 | public void controlResized(final ControlEvent event) { |
| 665 | fDataModel.complete(); |
| 666 | } |
| 667 | |
| 668 | // ------------------------------------------------------------------------ |
| 669 | // Signal Handlers |
| 670 | // ------------------------------------------------------------------------ |
| 671 | |
| 672 | /** |
| 673 | * Format the timestamp and update the display |
| 674 | * |
| 675 | * @param signal the incoming signal |
| 676 | * @since 2.0 |
| 677 | */ |
| 678 | @TmfSignalHandler |
| 679 | public void timestampFormatUpdated(TmfTimestampFormatUpdateSignal signal) { |
| 680 | if (fDataModel.getNbEvents() == 0) { |
| 681 | return; |
| 682 | } |
| 683 | |
| 684 | String newTS = TmfTimestampFormat.getDefaulTimeFormat().format(fDataModel.getFirstBucketTime()); |
| 685 | fTimeRangeStartText.setText(newTS); |
| 686 | |
| 687 | newTS = TmfTimestampFormat.getDefaulTimeFormat().format(fDataModel.getEndTime()); |
| 688 | fTimeRangeEndText.setText(newTS); |
| 689 | |
| 690 | fComposite.layout(); |
| 691 | } |
| 692 | |
| 693 | } |