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1 | /******************************************************************************* |
2 | * Copyright (c) 2011 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 | *******************************************************************************/ | |
12 | ||
13 | package org.eclipse.linuxtools.lttng.ui.views.histogram; | |
14 | ||
15 | import org.eclipse.linuxtools.tmf.ui.views.TmfView; | |
16 | import org.eclipse.swt.SWT; | |
17 | import org.eclipse.swt.events.ControlEvent; | |
18 | import org.eclipse.swt.events.ControlListener; | |
19 | import org.eclipse.swt.events.KeyEvent; | |
20 | import org.eclipse.swt.events.KeyListener; | |
21 | import org.eclipse.swt.events.MouseEvent; | |
22 | import org.eclipse.swt.events.MouseListener; | |
23 | import org.eclipse.swt.events.MouseTrackListener; | |
24 | import org.eclipse.swt.events.PaintEvent; | |
25 | import org.eclipse.swt.events.PaintListener; | |
26 | import org.eclipse.swt.graphics.Color; | |
27 | import org.eclipse.swt.graphics.Font; | |
28 | import org.eclipse.swt.graphics.FontData; | |
29 | import org.eclipse.swt.graphics.GC; | |
30 | import org.eclipse.swt.graphics.Image; | |
31 | import org.eclipse.swt.layout.GridData; | |
32 | import org.eclipse.swt.layout.GridLayout; | |
33 | import org.eclipse.swt.widgets.Canvas; | |
34 | import org.eclipse.swt.widgets.Composite; | |
35 | import org.eclipse.swt.widgets.Display; | |
36 | import org.eclipse.swt.widgets.Text; | |
37 | ||
38 | /** | |
39 | * <b><u>Histogram</u></b> | |
40 | * <p> | |
41 | * Re-usable histogram widget with the following features: | |
42 | * <ul> | |
43 | * <li>Y-axis labels displaying min/max count values | |
44 | * <li>X-axis labels displaying time range | |
45 | * <li>a histogram displaying the distribution of values over time (note that | |
46 | * the histogram might not necessarily fill the whole canvas) | |
47 | * </ul> | |
48 | * The widget also has 2 'markers' to identify: | |
49 | * <ul> | |
50 | * <li>a red dashed line over the bar that contains the currently selected event | |
51 | * <li>a dark red dashed line that delimits the right end of the histogram (if | |
52 | * it doesn't fill the canvas) | |
53 | * </ul> | |
54 | * Clicking on the histogram will select the current event at the mouse | |
55 | * location. | |
56 | * <p> | |
57 | * Once the histogram is selected, there is some limited keyboard support: | |
58 | * <ul> | |
59 | * <li>Home: go to the first histogram bar | |
60 | * <li>End: go to the last histogram bar | |
61 | * <li>Left: go to the previous histogram | |
62 | * <li>Right: go to the next histogram bar | |
63 | * </ul> | |
64 | * Finally, when the mouse hovers over the histogram, a tool tip showing the | |
65 | * following information about the corresponding histogram bar time range: | |
66 | * <ul> | |
67 | * <li>start of the time range | |
68 | * <li>end of the time range | |
69 | * <li>number of events in that time range | |
70 | * </ul> | |
71 | */ | |
72 | public abstract class Histogram implements ControlListener, PaintListener, KeyListener, MouseListener, MouseTrackListener { | |
73 | ||
74 | // ------------------------------------------------------------------------ | |
75 | // Constants | |
76 | // ------------------------------------------------------------------------ | |
77 | ||
78 | // Histogram refresh frequency | |
79 | private final static int REFRESH_FREQUENCY = HistogramDataModel.DEFAULT_NUMBER_OF_BUCKETS; | |
80 | ||
81 | // Histogram colors | |
82 | private final Color fBackgroundColor = Display.getCurrent().getSystemColor(SWT.COLOR_WHITE); | |
83 | private final Color fCurrentEventColor = Display.getCurrent().getSystemColor(SWT.COLOR_RED); | |
84 | private final Color fLastEventColor = Display.getCurrent().getSystemColor(SWT.COLOR_DARK_RED); | |
85 | private final Color fHistoBarColor = new Color(Display.getDefault(), 74, 112, 139); | |
86 | ||
87 | // Timestamp scale (nanosecond) | |
88 | public static final byte TIME_SCALE = -9; | |
89 | ||
90 | // ------------------------------------------------------------------------ | |
91 | // Attributes | |
92 | // ------------------------------------------------------------------------ | |
93 | ||
94 | // Owner view | |
95 | protected TmfView fParentView; | |
96 | ||
97 | // Histogram text fields | |
98 | private Text fMaxNbEventsText; | |
99 | private Text fMinNbEventsText; | |
100 | private Text fTimeRangeStartText; | |
101 | private Text fTimeRangeEndText; | |
102 | ||
103 | // Histogram drawing area | |
104 | protected Canvas fCanvas; | |
105 | ||
106 | // Data model | |
107 | protected final HistogramDataModel fDataModel; | |
108 | protected HistogramScaledData fScaledData; | |
109 | ||
110 | protected long fCurrentEventTime = 0; | |
111 | ||
112 | // ------------------------------------------------------------------------ | |
113 | // Construction | |
114 | // ------------------------------------------------------------------------ | |
115 | ||
116 | public Histogram(TmfView view, Composite parent) { | |
117 | fParentView = view; | |
118 | ||
119 | createWidget(parent); | |
120 | fDataModel = new HistogramDataModel(); | |
121 | clear(); | |
122 | ||
123 | fCanvas.addControlListener(this); | |
124 | fCanvas.addPaintListener(this); | |
125 | fCanvas.addKeyListener(this); | |
126 | fCanvas.addMouseListener(this); | |
127 | fCanvas.addMouseTrackListener(this); | |
128 | } | |
129 | ||
130 | public void dispose() { | |
131 | fHistoBarColor.dispose(); | |
132 | } | |
133 | ||
134 | private void createWidget(Composite parent) { | |
135 | ||
136 | final Color labelColor = parent.getDisplay().getSystemColor(SWT.COLOR_TITLE_INACTIVE_BACKGROUND); | |
137 | final Font fFont = adjustFont(parent); | |
138 | ||
139 | final int initalWidth = 10; | |
140 | ||
141 | // -------------------------------------------------------------------- | |
142 | // Define the histogram | |
143 | // -------------------------------------------------------------------- | |
144 | ||
145 | GridLayout gridLayout = new GridLayout(); | |
146 | gridLayout.numColumns = 3; | |
147 | gridLayout.marginHeight = 0; | |
148 | gridLayout.marginWidth = 0; | |
149 | gridLayout.marginTop = 0; | |
150 | gridLayout.horizontalSpacing = 0; | |
151 | gridLayout.verticalSpacing = 0; | |
152 | gridLayout.marginLeft = 0; | |
153 | gridLayout.marginRight = 0; | |
154 | Composite composite = new Composite(parent, SWT.FILL); | |
155 | composite.setLayout(gridLayout); | |
156 | ||
157 | // Use all the horizontal space | |
158 | GridData gridData = new GridData(); | |
159 | gridData.horizontalAlignment = SWT.FILL; | |
160 | gridData.verticalAlignment = SWT.FILL; | |
161 | gridData.grabExcessHorizontalSpace = true; | |
162 | composite.setLayoutData(gridData); | |
163 | ||
164 | // Y-axis max event | |
165 | gridData = new GridData(); | |
166 | gridData.horizontalAlignment = SWT.RIGHT; | |
167 | gridData.verticalAlignment = SWT.TOP; | |
168 | fMaxNbEventsText = new Text(composite, SWT.READ_ONLY | SWT.RIGHT); | |
169 | fMaxNbEventsText.setFont(fFont); | |
170 | fMaxNbEventsText.setBackground(labelColor); | |
171 | fMaxNbEventsText.setEditable(false); | |
172 | fMaxNbEventsText.setText("0"); //$NON-NLS-1$ | |
173 | fMaxNbEventsText.setLayoutData(gridData); | |
174 | ||
175 | // Histogram itself | |
176 | gridData = new GridData(); | |
177 | gridData.horizontalSpan = 2; | |
178 | gridData.verticalSpan = 2; | |
179 | gridData.horizontalAlignment = SWT.FILL; | |
180 | gridData.verticalAlignment = SWT.FILL; | |
181 | gridData.grabExcessHorizontalSpace = true; | |
182 | fCanvas = new Canvas(composite, SWT.BORDER | SWT.DOUBLE_BUFFERED); | |
183 | fCanvas.setLayoutData(gridData); | |
184 | ||
185 | // Y-axis min event (always 0...) | |
186 | gridData = new GridData(); | |
187 | gridData.horizontalAlignment = SWT.RIGHT; | |
188 | gridData.verticalAlignment = SWT.BOTTOM; | |
189 | fMinNbEventsText = new Text(composite, SWT.READ_ONLY | SWT.RIGHT); | |
190 | fMinNbEventsText.setFont(fFont); | |
191 | fMinNbEventsText.setBackground(labelColor); | |
192 | fMinNbEventsText.setEditable(false); | |
193 | fMinNbEventsText.setText("0"); //$NON-NLS-1$ | |
194 | fMinNbEventsText.setLayoutData(gridData); | |
195 | ||
196 | // Dummy cell | |
197 | gridData = new GridData(initalWidth, SWT.DEFAULT); | |
198 | gridData.horizontalAlignment = SWT.RIGHT; | |
199 | gridData.verticalAlignment = SWT.BOTTOM; | |
200 | Text dummyText = new Text(composite, SWT.READ_ONLY); | |
201 | dummyText.setFont(fFont); | |
202 | dummyText.setBackground(labelColor); | |
203 | dummyText.setEditable(false); | |
204 | dummyText.setText(""); //$NON-NLS-1$ | |
205 | dummyText.setLayoutData(gridData); | |
206 | ||
207 | // Window range start time | |
208 | gridData = new GridData(); | |
209 | gridData.horizontalAlignment = SWT.LEFT; | |
210 | gridData.verticalAlignment = SWT.BOTTOM; | |
211 | fTimeRangeStartText = new Text(composite, SWT.READ_ONLY); | |
212 | fTimeRangeStartText.setFont(fFont); | |
213 | fTimeRangeStartText.setBackground(labelColor); | |
214 | fTimeRangeStartText.setText(HistogramUtils.nanosecondsToString(0)); | |
215 | fTimeRangeStartText.setLayoutData(gridData); | |
216 | ||
217 | // Window range end time | |
218 | gridData = new GridData(); | |
219 | gridData.horizontalAlignment = SWT.RIGHT; | |
220 | gridData.verticalAlignment = SWT.BOTTOM; | |
221 | fTimeRangeEndText = new Text(composite, SWT.READ_ONLY); | |
222 | fTimeRangeEndText.setFont(fFont); | |
223 | fTimeRangeEndText.setBackground(labelColor); | |
224 | fTimeRangeEndText.setText(HistogramUtils.nanosecondsToString(0)); | |
225 | fTimeRangeEndText.setLayoutData(gridData); | |
226 | } | |
227 | ||
228 | private Font adjustFont(Composite composite) { | |
229 | // Reduce font size for a more pleasing rendering | |
230 | int fontSizeAdjustment = -2; | |
231 | Font font = composite.getFont(); | |
232 | FontData fontData = font.getFontData()[0]; | |
233 | return new Font(font.getDevice(), fontData.getName(), fontData.getHeight() + fontSizeAdjustment, fontData.getStyle()); | |
234 | } | |
235 | ||
236 | // ------------------------------------------------------------------------ | |
237 | // Accessors | |
238 | // ------------------------------------------------------------------------ | |
239 | ||
240 | public long getStartTime() { | |
241 | return fDataModel.getStartTime(); | |
242 | } | |
243 | ||
244 | public long getEndTime() { | |
245 | return fDataModel.getEndTime(); | |
246 | } | |
247 | ||
248 | public long getTimeLimit() { | |
249 | return fDataModel.getTimeLimit(); | |
250 | } | |
251 | ||
252 | // ------------------------------------------------------------------------ | |
253 | // Operations | |
254 | // ------------------------------------------------------------------------ | |
255 | ||
256 | public abstract void updateTimeRange(long startTime, long endTime); | |
257 | ||
258 | /** | |
259 | * Clear the histogram and reset the data | |
260 | */ | |
261 | public void clear() { | |
262 | fDataModel.clear(); | |
263 | fScaledData = null; | |
264 | refresh(); | |
265 | } | |
266 | ||
267 | /** | |
268 | * Increase the histogram bucket corresponding to [timestamp] | |
269 | * | |
270 | * @param timestamp | |
271 | */ | |
272 | public void countEvent(long timestamp) { | |
273 | fDataModel.countEvent(timestamp); | |
274 | if (fDataModel.getNbEvents() % REFRESH_FREQUENCY == 0) { | |
275 | refresh(); | |
74237cc3 | 276 | refresh(); // This is intentional. Exercise left to the reader :-) |
c392540b FC |
277 | } |
278 | } | |
279 | ||
280 | /** | |
281 | * Sets the current event time and refresh the display | |
282 | * | |
283 | * @param timestamp | |
284 | */ | |
285 | public void setCurrentEvent(long timestamp) { | |
74237cc3 | 286 | fCurrentEventTime = (timestamp > 0) ? timestamp : 0; |
c392540b FC |
287 | fDataModel.setCurrentEvent(timestamp); |
288 | refresh(); | |
289 | } | |
290 | ||
291 | /** | |
292 | * Computes the timestamp of the bucket at [offset] | |
293 | * | |
294 | * @param offset offset from the left on the histogram | |
295 | * @return the start timestamp of the corresponding bucket | |
296 | */ | |
297 | public synchronized long getTimestamp(int offset) { | |
298 | assert offset > 0 && offset < fScaledData.fWidth; | |
299 | try { | |
300 | return fDataModel.getStartTime() + fScaledData.fBucketDuration * offset; | |
301 | } catch (Exception e) { | |
302 | return 0; // TODO: Fix that racing condition (NPE) | |
303 | } | |
304 | } | |
305 | ||
306 | /** | |
307 | * Computes the offset of the timestamp in the histogram | |
308 | * | |
309 | * @param timestamp the timestamp | |
310 | * @return the offset of the corresponding bucket (-1 if invalid) | |
311 | */ | |
312 | public synchronized int getOffset(long timestamp) { | |
313 | if (timestamp < fDataModel.getStartTime() || timestamp > fDataModel.getEndTime()) | |
314 | return -1; | |
315 | return (int) ((timestamp - fDataModel.getStartTime()) / fScaledData.fBucketDuration); | |
316 | } | |
317 | ||
318 | /** | |
319 | * Move the currently selected bar cursor to a non-empty bucket. | |
320 | * | |
321 | * @param keyCode the SWT key code | |
322 | */ | |
323 | protected void moveCursor(int keyCode) { | |
324 | ||
325 | if (fScaledData.fCurrentBucket == HistogramScaledData.OUT_OF_RANGE_BUCKET) | |
326 | return; | |
327 | ||
328 | int index; | |
329 | switch (keyCode) { | |
330 | ||
331 | case SWT.HOME: | |
332 | index = 0; | |
333 | while (index < fScaledData.fLastBucket && fScaledData.fData[index] == 0) | |
334 | index++; | |
335 | if (index < fScaledData.fLastBucket) | |
336 | fScaledData.fCurrentBucket = index; | |
337 | break; | |
338 | ||
339 | case SWT.ARROW_RIGHT: | |
340 | index = fScaledData.fCurrentBucket + 1; | |
341 | while (index < fScaledData.fWidth && fScaledData.fData[index] == 0) | |
342 | index++; | |
343 | if (index < fScaledData.fLastBucket) | |
344 | fScaledData.fCurrentBucket = index; | |
345 | break; | |
346 | ||
347 | case SWT.END: | |
348 | index = fScaledData.fLastBucket; | |
349 | while (index >= 0 && fScaledData.fData[index] == 0) | |
350 | index--; | |
351 | if (index >= 0) | |
352 | fScaledData.fCurrentBucket = index; | |
353 | break; | |
354 | ||
355 | case SWT.ARROW_LEFT: | |
356 | index = fScaledData.fCurrentBucket - 1; | |
357 | while (index >= 0 && fScaledData.fData[index] == 0) | |
358 | index--; | |
359 | if (index >= 0) | |
360 | fScaledData.fCurrentBucket = index; | |
361 | break; | |
362 | ||
363 | default: | |
364 | return; | |
365 | } | |
366 | ||
367 | updateCurrentEventTime(); | |
368 | } | |
369 | ||
370 | /** | |
371 | * Refresh the histogram display | |
372 | */ | |
373 | protected void refresh() { | |
374 | if (!fCanvas.isDisposed() && fCanvas.getDisplay() != null) { | |
375 | fCanvas.getDisplay().asyncExec(new Runnable() { | |
376 | @Override | |
377 | public void run() { | |
378 | if (!fCanvas.isDisposed()) { | |
379 | // Retrieve and normalize the data | |
380 | int canvasWidth = fCanvas.getBounds().width; | |
381 | int canvasHeight = fCanvas.getBounds().height; | |
382 | fDataModel.setCurrentEvent(fCurrentEventTime); | |
383 | fScaledData = fDataModel.scaleTo(canvasWidth, canvasHeight); | |
c392540b | 384 | fCanvas.redraw(); |
74237cc3 | 385 | // Display histogram and update X-,Y-axis labels |
c392540b FC |
386 | fTimeRangeStartText.setText(HistogramUtils.nanosecondsToString(fDataModel.getStartTime())); |
387 | fTimeRangeEndText.setText(HistogramUtils.nanosecondsToString(fDataModel.getEndTime())); | |
74237cc3 | 388 | fMaxNbEventsText.setText(Long.toString(fScaledData.fMaxValue)); |
c392540b FC |
389 | // The Y-axis area might need to be re-sized |
390 | fMaxNbEventsText.getParent().layout(); | |
391 | } | |
392 | } | |
393 | }); | |
394 | } | |
395 | } | |
396 | ||
397 | // ------------------------------------------------------------------------ | |
398 | // Helper functions | |
399 | // ------------------------------------------------------------------------ | |
400 | ||
401 | private void updateCurrentEventTime() { | |
402 | long bucketStartTime = getTimestamp(fScaledData.fCurrentBucket); | |
403 | ((HistogramView) fParentView).updateCurrentEventTime(bucketStartTime); | |
404 | } | |
405 | ||
406 | // ------------------------------------------------------------------------ | |
407 | // PaintListener | |
408 | // ------------------------------------------------------------------------ | |
409 | ||
410 | protected final String IMAGE_KEY = "double-buffer-image"; //$NON-NLS-1$ | |
411 | ||
412 | @Override | |
413 | public void paintControl(PaintEvent event) { | |
414 | ||
415 | // Get the geometry | |
416 | int canvasWidth = fCanvas.getBounds().width; | |
417 | int canvasHeight = fCanvas.getBounds().height; | |
418 | ||
419 | // Make sure we have something to draw upon | |
420 | if (canvasWidth <= 0 || canvasHeight <= 0) | |
421 | return; | |
422 | ||
423 | // Retrieve image; re-create only if necessary | |
424 | Image image = (Image) fCanvas.getData(IMAGE_KEY); | |
425 | if (image == null || image.getBounds().width != canvasWidth || image.getBounds().height != canvasHeight) { | |
426 | image = new Image(event.display, canvasWidth, canvasHeight); | |
427 | fCanvas.setData(IMAGE_KEY, image); | |
428 | } | |
429 | ||
430 | // Draw the histogram on its canvas | |
431 | GC imageGC = new GC(image); | |
432 | formatImage(imageGC, image); | |
433 | event.gc.drawImage(image, 0, 0); | |
434 | imageGC.dispose(); | |
435 | } | |
436 | ||
437 | private void formatImage(GC imageGC, Image image) { | |
438 | ||
439 | if (fScaledData == null) | |
440 | return; | |
441 | ||
442 | HistogramScaledData scaledData = new HistogramScaledData(fScaledData); | |
443 | ||
444 | try { | |
445 | // Get drawing boundaries | |
446 | int width = image.getBounds().width; | |
447 | int height = image.getBounds().height; | |
448 | ||
449 | // Clear the drawing area | |
450 | imageGC.setBackground(fBackgroundColor); | |
451 | imageGC.fillRectangle(0, 0, image.getBounds().width + 1, image.getBounds().height + 1); | |
452 | ||
453 | // Draw the histogram bars | |
454 | imageGC.setBackground(fHistoBarColor); | |
455 | int limit = width < scaledData.fWidth ? width : scaledData.fWidth; | |
456 | for (int i = 1; i < limit; i++) { | |
457 | int value = (int) (scaledData.fData[i] * scaledData.fScalingFactor); | |
458 | imageGC.fillRectangle(i, height - value, 1, value); | |
459 | } | |
460 | ||
461 | // Draw the current event bar | |
462 | int currentBucket = scaledData.fCurrentBucket; | |
463 | if (currentBucket >= 0 && currentBucket < limit) { | |
464 | drawDelimiter(imageGC, fCurrentEventColor, height, currentBucket); | |
465 | } | |
466 | ||
467 | // Add a dashed line as a delimiter (at the right of the last bar) | |
468 | int lastEventIndex = limit - 1; | |
469 | while (lastEventIndex >= 0 && scaledData.fData[lastEventIndex] == 0) | |
470 | lastEventIndex--; | |
471 | lastEventIndex += (lastEventIndex < limit - 1) ? 1 : 0; | |
472 | drawDelimiter(imageGC, fLastEventColor, height, lastEventIndex); | |
473 | } catch (Exception e) { | |
474 | // Do nothing | |
475 | } | |
476 | } | |
477 | ||
478 | private void drawDelimiter(GC imageGC, Color color, int height, int index) { | |
479 | imageGC.setBackground(color); | |
480 | int dash = height / 4; | |
481 | imageGC.fillRectangle(index, 0 * dash, 1, dash - 1); | |
482 | imageGC.fillRectangle(index, 1 * dash, 1, dash - 1); | |
483 | imageGC.fillRectangle(index, 2 * dash, 1, dash - 1); | |
484 | imageGC.fillRectangle(index, 3 * dash, 1, height - 3 * dash); | |
485 | } | |
486 | ||
487 | // ------------------------------------------------------------------------ | |
488 | // KeyListener | |
489 | // ------------------------------------------------------------------------ | |
490 | ||
491 | @Override | |
492 | public void keyPressed(KeyEvent event) { | |
493 | moveCursor(event.keyCode); | |
494 | } | |
495 | ||
496 | @Override | |
497 | public void keyReleased(KeyEvent event) { | |
498 | } | |
499 | ||
500 | // ------------------------------------------------------------------------ | |
501 | // MouseListener | |
502 | // ------------------------------------------------------------------------ | |
503 | ||
504 | @Override | |
505 | public void mouseDoubleClick(MouseEvent event) { | |
506 | } | |
507 | ||
508 | @Override | |
509 | public void mouseDown(MouseEvent event) { | |
510 | if (fDataModel.getNbEvents() > 0 && fScaledData.fLastBucket >= event.x) { | |
511 | fScaledData.fCurrentBucket = event.x; | |
512 | updateCurrentEventTime(); | |
513 | } | |
514 | } | |
515 | ||
516 | @Override | |
517 | public void mouseUp(MouseEvent event) { | |
518 | } | |
519 | ||
520 | // ------------------------------------------------------------------------ | |
521 | // MouseTrackListener | |
522 | // ------------------------------------------------------------------------ | |
523 | ||
524 | @Override | |
525 | public void mouseEnter(MouseEvent event) { | |
526 | } | |
527 | ||
528 | @Override | |
529 | public void mouseExit(MouseEvent event) { | |
530 | } | |
531 | ||
532 | @Override | |
533 | public void mouseHover(MouseEvent event) { | |
74237cc3 | 534 | if (fDataModel.getNbEvents() > 0 && fScaledData != null && fScaledData.fLastBucket >= event.x) { |
c392540b FC |
535 | String tooltip = formatToolTipLabel(event.x); |
536 | fCanvas.setToolTipText(tooltip); | |
537 | } | |
538 | } | |
539 | ||
540 | private String formatToolTipLabel(int index) { | |
541 | long startTime = fDataModel.getStartTime() + fScaledData.fCurrentBucket * fScaledData.fBucketDuration; | |
542 | long endTime = startTime + fScaledData.fBucketDuration; | |
74237cc3 | 543 | int nbEvents = (index >= 0) ? fScaledData.fData[index] : 0; |
c392540b FC |
544 | |
545 | StringBuffer buffer = new StringBuffer(); | |
546 | buffer.append("Range = ["); //$NON-NLS-1$ | |
547 | buffer.append(HistogramUtils.nanosecondsToString(startTime)); | |
548 | buffer.append(","); //$NON-NLS-1$ | |
549 | buffer.append(HistogramUtils.nanosecondsToString(endTime)); | |
550 | buffer.append(")\n"); //$NON-NLS-1$ | |
551 | buffer.append("Event count = "); //$NON-NLS-1$ | |
552 | buffer.append(nbEvents); | |
553 | return buffer.toString(); | |
554 | } | |
555 | ||
556 | // ------------------------------------------------------------------------ | |
557 | // ControlListener | |
558 | // ------------------------------------------------------------------------ | |
559 | ||
560 | @Override | |
561 | public void controlMoved(ControlEvent event) { | |
562 | refresh(); | |
563 | } | |
564 | ||
565 | @Override | |
566 | public void controlResized(ControlEvent event) { | |
567 | refresh(); | |
568 | } | |
569 | ||
570 | } |