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c392540b | 1 | /******************************************************************************* |
e0752744 | 2 | * Copyright (c) 2011, 2012 Ericsson |
c392540b FC |
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 | |
fbd124dd | 11 | * Bernd Hufmann - Changed to updated histogram data model |
e0752744 | 12 | * Francois Chouinard - Initial API and implementation |
c392540b FC |
13 | *******************************************************************************/ |
14 | ||
e0752744 | 15 | package org.eclipse.linuxtools.tmf.ui.views.histogram; |
c392540b FC |
16 | |
17 | import org.eclipse.linuxtools.tmf.ui.views.TmfView; | |
18 | import org.eclipse.swt.SWT; | |
19 | import org.eclipse.swt.events.ControlEvent; | |
20 | import org.eclipse.swt.events.ControlListener; | |
21 | import org.eclipse.swt.events.KeyEvent; | |
22 | import org.eclipse.swt.events.KeyListener; | |
23 | import org.eclipse.swt.events.MouseEvent; | |
24 | import org.eclipse.swt.events.MouseListener; | |
25 | import org.eclipse.swt.events.MouseTrackListener; | |
26 | import org.eclipse.swt.events.PaintEvent; | |
27 | import org.eclipse.swt.events.PaintListener; | |
28 | import org.eclipse.swt.graphics.Color; | |
29 | import org.eclipse.swt.graphics.Font; | |
30 | import org.eclipse.swt.graphics.FontData; | |
31 | import org.eclipse.swt.graphics.GC; | |
32 | import org.eclipse.swt.graphics.Image; | |
33 | import org.eclipse.swt.layout.GridData; | |
34 | import org.eclipse.swt.layout.GridLayout; | |
35 | import org.eclipse.swt.widgets.Canvas; | |
36 | import org.eclipse.swt.widgets.Composite; | |
37 | import org.eclipse.swt.widgets.Display; | |
38 | import org.eclipse.swt.widgets.Text; | |
39 | ||
40 | /** | |
41 | * <b><u>Histogram</u></b> | |
42 | * <p> | |
43 | * Re-usable histogram widget with the following features: | |
44 | * <ul> | |
45 | * <li>Y-axis labels displaying min/max count values | |
46 | * <li>X-axis labels displaying time range | |
47 | * <li>a histogram displaying the distribution of values over time (note that | |
48 | * the histogram might not necessarily fill the whole canvas) | |
49 | * </ul> | |
50 | * The widget also has 2 'markers' to identify: | |
51 | * <ul> | |
52 | * <li>a red dashed line over the bar that contains the currently selected event | |
53 | * <li>a dark red dashed line that delimits the right end of the histogram (if | |
54 | * it doesn't fill the canvas) | |
55 | * </ul> | |
56 | * Clicking on the histogram will select the current event at the mouse | |
57 | * location. | |
58 | * <p> | |
59 | * Once the histogram is selected, there is some limited keyboard support: | |
60 | * <ul> | |
61 | * <li>Home: go to the first histogram bar | |
62 | * <li>End: go to the last histogram bar | |
63 | * <li>Left: go to the previous histogram | |
64 | * <li>Right: go to the next histogram bar | |
65 | * </ul> | |
66 | * Finally, when the mouse hovers over the histogram, a tool tip showing the | |
67 | * following information about the corresponding histogram bar time range: | |
68 | * <ul> | |
69 | * <li>start of the time range | |
70 | * <li>end of the time range | |
71 | * <li>number of events in that time range | |
72 | * </ul> | |
73 | */ | |
fbd124dd | 74 | public abstract class Histogram implements ControlListener, PaintListener, KeyListener, MouseListener, MouseTrackListener, IHistogramModelListener { |
c392540b FC |
75 | |
76 | // ------------------------------------------------------------------------ | |
77 | // Constants | |
78 | // ------------------------------------------------------------------------ | |
79 | ||
c392540b FC |
80 | // Histogram colors |
81 | private final Color fBackgroundColor = Display.getCurrent().getSystemColor(SWT.COLOR_WHITE); | |
82 | private final Color fCurrentEventColor = Display.getCurrent().getSystemColor(SWT.COLOR_RED); | |
83 | private final Color fLastEventColor = Display.getCurrent().getSystemColor(SWT.COLOR_DARK_RED); | |
84 | private final Color fHistoBarColor = new Color(Display.getDefault(), 74, 112, 139); | |
85 | ||
86 | // Timestamp scale (nanosecond) | |
87 | public static final byte TIME_SCALE = -9; | |
fbd124dd BH |
88 | |
89 | public static final int HISTOGRAM_BAR_WIDTH = 1; | |
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90 | |
91 | // ------------------------------------------------------------------------ | |
92 | // Attributes | |
93 | // ------------------------------------------------------------------------ | |
94 | ||
95 | // Owner view | |
96 | protected TmfView fParentView; | |
97 | ||
98 | // Histogram text fields | |
99 | private Text fMaxNbEventsText; | |
100 | private Text fMinNbEventsText; | |
101 | private Text fTimeRangeStartText; | |
102 | private Text fTimeRangeEndText; | |
103 | ||
104 | // Histogram drawing area | |
105 | protected Canvas fCanvas; | |
106 | ||
107 | // Data model | |
108 | protected final HistogramDataModel fDataModel; | |
109 | protected HistogramScaledData fScaledData; | |
110 | ||
111 | protected long fCurrentEventTime = 0; | |
112 | ||
113 | // ------------------------------------------------------------------------ | |
114 | // Construction | |
115 | // ------------------------------------------------------------------------ | |
116 | ||
117 | public Histogram(TmfView view, Composite parent) { | |
118 | fParentView = view; | |
119 | ||
120 | createWidget(parent); | |
121 | fDataModel = new HistogramDataModel(); | |
fbd124dd | 122 | fDataModel.addHistogramListener(this); |
c392540b FC |
123 | clear(); |
124 | ||
125 | fCanvas.addControlListener(this); | |
126 | fCanvas.addPaintListener(this); | |
127 | fCanvas.addKeyListener(this); | |
128 | fCanvas.addMouseListener(this); | |
129 | fCanvas.addMouseTrackListener(this); | |
130 | } | |
131 | ||
132 | public void dispose() { | |
133 | fHistoBarColor.dispose(); | |
fbd124dd | 134 | fDataModel.removeHistogramListener(this); |
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135 | } |
136 | ||
137 | private void createWidget(Composite parent) { | |
138 | ||
0301dc43 | 139 | final Color labelColor = parent.getBackground(); |
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140 | final Font fFont = adjustFont(parent); |
141 | ||
142 | final int initalWidth = 10; | |
143 | ||
144 | // -------------------------------------------------------------------- | |
145 | // Define the histogram | |
146 | // -------------------------------------------------------------------- | |
147 | ||
148 | GridLayout gridLayout = new GridLayout(); | |
149 | gridLayout.numColumns = 3; | |
150 | gridLayout.marginHeight = 0; | |
151 | gridLayout.marginWidth = 0; | |
152 | gridLayout.marginTop = 0; | |
153 | gridLayout.horizontalSpacing = 0; | |
154 | gridLayout.verticalSpacing = 0; | |
155 | gridLayout.marginLeft = 0; | |
156 | gridLayout.marginRight = 0; | |
157 | Composite composite = new Composite(parent, SWT.FILL); | |
158 | composite.setLayout(gridLayout); | |
159 | ||
160 | // Use all the horizontal space | |
161 | GridData gridData = new GridData(); | |
162 | gridData.horizontalAlignment = SWT.FILL; | |
163 | gridData.verticalAlignment = SWT.FILL; | |
164 | gridData.grabExcessHorizontalSpace = true; | |
165 | composite.setLayoutData(gridData); | |
166 | ||
167 | // Y-axis max event | |
168 | gridData = new GridData(); | |
169 | gridData.horizontalAlignment = SWT.RIGHT; | |
170 | gridData.verticalAlignment = SWT.TOP; | |
171 | fMaxNbEventsText = new Text(composite, SWT.READ_ONLY | SWT.RIGHT); | |
172 | fMaxNbEventsText.setFont(fFont); | |
173 | fMaxNbEventsText.setBackground(labelColor); | |
174 | fMaxNbEventsText.setEditable(false); | |
175 | fMaxNbEventsText.setText("0"); //$NON-NLS-1$ | |
176 | fMaxNbEventsText.setLayoutData(gridData); | |
177 | ||
178 | // Histogram itself | |
179 | gridData = new GridData(); | |
180 | gridData.horizontalSpan = 2; | |
181 | gridData.verticalSpan = 2; | |
182 | gridData.horizontalAlignment = SWT.FILL; | |
183 | gridData.verticalAlignment = SWT.FILL; | |
184 | gridData.grabExcessHorizontalSpace = true; | |
185 | fCanvas = new Canvas(composite, SWT.BORDER | SWT.DOUBLE_BUFFERED); | |
186 | fCanvas.setLayoutData(gridData); | |
187 | ||
188 | // Y-axis min event (always 0...) | |
189 | gridData = new GridData(); | |
190 | gridData.horizontalAlignment = SWT.RIGHT; | |
191 | gridData.verticalAlignment = SWT.BOTTOM; | |
192 | fMinNbEventsText = new Text(composite, SWT.READ_ONLY | SWT.RIGHT); | |
193 | fMinNbEventsText.setFont(fFont); | |
194 | fMinNbEventsText.setBackground(labelColor); | |
195 | fMinNbEventsText.setEditable(false); | |
196 | fMinNbEventsText.setText("0"); //$NON-NLS-1$ | |
197 | fMinNbEventsText.setLayoutData(gridData); | |
198 | ||
199 | // Dummy cell | |
200 | gridData = new GridData(initalWidth, SWT.DEFAULT); | |
201 | gridData.horizontalAlignment = SWT.RIGHT; | |
202 | gridData.verticalAlignment = SWT.BOTTOM; | |
203 | Text dummyText = new Text(composite, SWT.READ_ONLY); | |
204 | dummyText.setFont(fFont); | |
205 | dummyText.setBackground(labelColor); | |
206 | dummyText.setEditable(false); | |
207 | dummyText.setText(""); //$NON-NLS-1$ | |
208 | dummyText.setLayoutData(gridData); | |
209 | ||
210 | // Window range start time | |
211 | gridData = new GridData(); | |
212 | gridData.horizontalAlignment = SWT.LEFT; | |
213 | gridData.verticalAlignment = SWT.BOTTOM; | |
214 | fTimeRangeStartText = new Text(composite, SWT.READ_ONLY); | |
215 | fTimeRangeStartText.setFont(fFont); | |
216 | fTimeRangeStartText.setBackground(labelColor); | |
217 | fTimeRangeStartText.setText(HistogramUtils.nanosecondsToString(0)); | |
218 | fTimeRangeStartText.setLayoutData(gridData); | |
219 | ||
220 | // Window range end time | |
221 | gridData = new GridData(); | |
222 | gridData.horizontalAlignment = SWT.RIGHT; | |
223 | gridData.verticalAlignment = SWT.BOTTOM; | |
224 | fTimeRangeEndText = new Text(composite, SWT.READ_ONLY); | |
225 | fTimeRangeEndText.setFont(fFont); | |
226 | fTimeRangeEndText.setBackground(labelColor); | |
227 | fTimeRangeEndText.setText(HistogramUtils.nanosecondsToString(0)); | |
228 | fTimeRangeEndText.setLayoutData(gridData); | |
229 | } | |
230 | ||
231 | private Font adjustFont(Composite composite) { | |
232 | // Reduce font size for a more pleasing rendering | |
233 | int fontSizeAdjustment = -2; | |
234 | Font font = composite.getFont(); | |
235 | FontData fontData = font.getFontData()[0]; | |
236 | return new Font(font.getDevice(), fontData.getName(), fontData.getHeight() + fontSizeAdjustment, fontData.getStyle()); | |
237 | } | |
238 | ||
239 | // ------------------------------------------------------------------------ | |
240 | // Accessors | |
241 | // ------------------------------------------------------------------------ | |
242 | ||
243 | public long getStartTime() { | |
fbd124dd | 244 | return fDataModel.getFirstBucketTime(); |
c392540b FC |
245 | } |
246 | ||
247 | public long getEndTime() { | |
248 | return fDataModel.getEndTime(); | |
249 | } | |
250 | ||
251 | public long getTimeLimit() { | |
252 | return fDataModel.getTimeLimit(); | |
253 | } | |
fbd124dd BH |
254 | |
255 | public HistogramDataModel getDataModel() { | |
256 | return fDataModel; | |
257 | } | |
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258 | |
259 | // ------------------------------------------------------------------------ | |
260 | // Operations | |
261 | // ------------------------------------------------------------------------ | |
c392540b FC |
262 | public abstract void updateTimeRange(long startTime, long endTime); |
263 | ||
264 | /** | |
265 | * Clear the histogram and reset the data | |
266 | */ | |
267 | public void clear() { | |
268 | fDataModel.clear(); | |
269 | fScaledData = null; | |
c392540b FC |
270 | } |
271 | ||
272 | /** | |
273 | * Increase the histogram bucket corresponding to [timestamp] | |
274 | * | |
275 | * @param timestamp | |
276 | */ | |
fbd124dd BH |
277 | public void countEvent(long eventCount, long timestamp) { |
278 | fDataModel.countEvent(eventCount, timestamp); | |
c392540b FC |
279 | } |
280 | ||
281 | /** | |
282 | * Sets the current event time and refresh the display | |
283 | * | |
284 | * @param timestamp | |
285 | */ | |
286 | public void setCurrentEvent(long timestamp) { | |
74237cc3 | 287 | fCurrentEventTime = (timestamp > 0) ? timestamp : 0; |
fbd124dd | 288 | fDataModel.setCurrentEventNotifyListeners(timestamp); |
c392540b FC |
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 { | |
fbd124dd | 300 | return fDataModel.getFirstBucketTime() + fScaledData.fBucketDuration * offset; |
c392540b FC |
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) { | |
fbd124dd | 313 | if (timestamp < fDataModel.getFirstBucketTime() || timestamp > fDataModel.getEndTime()) |
c392540b | 314 | return -1; |
fbd124dd | 315 | return (int) ((timestamp - fDataModel.getFirstBucketTime()) / fScaledData.fBucketDuration); |
c392540b FC |
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 | */ | |
fbd124dd BH |
373 | @Override |
374 | public void modelUpdated() { | |
c392540b FC |
375 | if (!fCanvas.isDisposed() && fCanvas.getDisplay() != null) { |
376 | fCanvas.getDisplay().asyncExec(new Runnable() { | |
377 | @Override | |
378 | public void run() { | |
379 | if (!fCanvas.isDisposed()) { | |
380 | // Retrieve and normalize the data | |
381 | int canvasWidth = fCanvas.getBounds().width; | |
382 | int canvasHeight = fCanvas.getBounds().height; | |
40890fec FC |
383 | if (canvasWidth <= 0 || canvasHeight <= 0) |
384 | return; | |
c392540b | 385 | fDataModel.setCurrentEvent(fCurrentEventTime); |
fbd124dd | 386 | fScaledData = fDataModel.scaleTo(canvasWidth, canvasHeight, HISTOGRAM_BAR_WIDTH); |
c392540b | 387 | fCanvas.redraw(); |
74237cc3 | 388 | // Display histogram and update X-,Y-axis labels |
fbd124dd | 389 | fTimeRangeStartText.setText(HistogramUtils.nanosecondsToString(fDataModel.getFirstBucketTime())); |
c392540b | 390 | fTimeRangeEndText.setText(HistogramUtils.nanosecondsToString(fDataModel.getEndTime())); |
74237cc3 | 391 | fMaxNbEventsText.setText(Long.toString(fScaledData.fMaxValue)); |
c392540b FC |
392 | // The Y-axis area might need to be re-sized |
393 | fMaxNbEventsText.getParent().layout(); | |
394 | } | |
395 | } | |
396 | }); | |
397 | } | |
398 | } | |
399 | ||
400 | // ------------------------------------------------------------------------ | |
401 | // Helper functions | |
402 | // ------------------------------------------------------------------------ | |
403 | ||
404 | private void updateCurrentEventTime() { | |
405 | long bucketStartTime = getTimestamp(fScaledData.fCurrentBucket); | |
406 | ((HistogramView) fParentView).updateCurrentEventTime(bucketStartTime); | |
407 | } | |
408 | ||
409 | // ------------------------------------------------------------------------ | |
410 | // PaintListener | |
411 | // ------------------------------------------------------------------------ | |
412 | ||
413 | protected final String IMAGE_KEY = "double-buffer-image"; //$NON-NLS-1$ | |
414 | ||
415 | @Override | |
416 | public void paintControl(PaintEvent event) { | |
417 | ||
418 | // Get the geometry | |
419 | int canvasWidth = fCanvas.getBounds().width; | |
420 | int canvasHeight = fCanvas.getBounds().height; | |
421 | ||
422 | // Make sure we have something to draw upon | |
423 | if (canvasWidth <= 0 || canvasHeight <= 0) | |
424 | return; | |
425 | ||
426 | // Retrieve image; re-create only if necessary | |
427 | Image image = (Image) fCanvas.getData(IMAGE_KEY); | |
428 | if (image == null || image.getBounds().width != canvasWidth || image.getBounds().height != canvasHeight) { | |
429 | image = new Image(event.display, canvasWidth, canvasHeight); | |
430 | fCanvas.setData(IMAGE_KEY, image); | |
431 | } | |
432 | ||
433 | // Draw the histogram on its canvas | |
434 | GC imageGC = new GC(image); | |
435 | formatImage(imageGC, image); | |
436 | event.gc.drawImage(image, 0, 0); | |
437 | imageGC.dispose(); | |
438 | } | |
439 | ||
440 | private void formatImage(GC imageGC, Image image) { | |
441 | ||
442 | if (fScaledData == null) | |
443 | return; | |
444 | ||
445 | HistogramScaledData scaledData = new HistogramScaledData(fScaledData); | |
446 | ||
447 | try { | |
448 | // Get drawing boundaries | |
449 | int width = image.getBounds().width; | |
450 | int height = image.getBounds().height; | |
451 | ||
452 | // Clear the drawing area | |
453 | imageGC.setBackground(fBackgroundColor); | |
454 | imageGC.fillRectangle(0, 0, image.getBounds().width + 1, image.getBounds().height + 1); | |
455 | ||
456 | // Draw the histogram bars | |
457 | imageGC.setBackground(fHistoBarColor); | |
458 | int limit = width < scaledData.fWidth ? width : scaledData.fWidth; | |
459 | for (int i = 1; i < limit; i++) { | |
460 | int value = (int) (scaledData.fData[i] * scaledData.fScalingFactor); | |
461 | imageGC.fillRectangle(i, height - value, 1, value); | |
462 | } | |
463 | ||
464 | // Draw the current event bar | |
465 | int currentBucket = scaledData.fCurrentBucket; | |
466 | if (currentBucket >= 0 && currentBucket < limit) { | |
467 | drawDelimiter(imageGC, fCurrentEventColor, height, currentBucket); | |
468 | } | |
469 | ||
470 | // Add a dashed line as a delimiter (at the right of the last bar) | |
471 | int lastEventIndex = limit - 1; | |
472 | while (lastEventIndex >= 0 && scaledData.fData[lastEventIndex] == 0) | |
473 | lastEventIndex--; | |
474 | lastEventIndex += (lastEventIndex < limit - 1) ? 1 : 0; | |
475 | drawDelimiter(imageGC, fLastEventColor, height, lastEventIndex); | |
476 | } catch (Exception e) { | |
477 | // Do nothing | |
478 | } | |
479 | } | |
480 | ||
481 | private void drawDelimiter(GC imageGC, Color color, int height, int index) { | |
482 | imageGC.setBackground(color); | |
483 | int dash = height / 4; | |
484 | imageGC.fillRectangle(index, 0 * dash, 1, dash - 1); | |
485 | imageGC.fillRectangle(index, 1 * dash, 1, dash - 1); | |
486 | imageGC.fillRectangle(index, 2 * dash, 1, dash - 1); | |
487 | imageGC.fillRectangle(index, 3 * dash, 1, height - 3 * dash); | |
488 | } | |
489 | ||
490 | // ------------------------------------------------------------------------ | |
491 | // KeyListener | |
492 | // ------------------------------------------------------------------------ | |
493 | ||
494 | @Override | |
495 | public void keyPressed(KeyEvent event) { | |
496 | moveCursor(event.keyCode); | |
497 | } | |
498 | ||
499 | @Override | |
500 | public void keyReleased(KeyEvent event) { | |
501 | } | |
502 | ||
503 | // ------------------------------------------------------------------------ | |
504 | // MouseListener | |
505 | // ------------------------------------------------------------------------ | |
506 | ||
507 | @Override | |
508 | public void mouseDoubleClick(MouseEvent event) { | |
509 | } | |
510 | ||
511 | @Override | |
512 | public void mouseDown(MouseEvent event) { | |
513 | if (fDataModel.getNbEvents() > 0 && fScaledData.fLastBucket >= event.x) { | |
514 | fScaledData.fCurrentBucket = event.x; | |
515 | updateCurrentEventTime(); | |
516 | } | |
517 | } | |
518 | ||
519 | @Override | |
520 | public void mouseUp(MouseEvent event) { | |
521 | } | |
522 | ||
523 | // ------------------------------------------------------------------------ | |
524 | // MouseTrackListener | |
525 | // ------------------------------------------------------------------------ | |
526 | ||
527 | @Override | |
528 | public void mouseEnter(MouseEvent event) { | |
529 | } | |
530 | ||
531 | @Override | |
532 | public void mouseExit(MouseEvent event) { | |
533 | } | |
534 | ||
535 | @Override | |
536 | public void mouseHover(MouseEvent event) { | |
74237cc3 | 537 | if (fDataModel.getNbEvents() > 0 && fScaledData != null && fScaledData.fLastBucket >= event.x) { |
c392540b FC |
538 | String tooltip = formatToolTipLabel(event.x); |
539 | fCanvas.setToolTipText(tooltip); | |
540 | } | |
541 | } | |
542 | ||
543 | private String formatToolTipLabel(int index) { | |
fbd124dd BH |
544 | long startTime = fScaledData.getBucketStartTime(fScaledData.fCurrentBucket); |
545 | // negative values are possible if time values came into the model in decreasing order | |
546 | if (startTime < 0) { | |
547 | startTime = 0; | |
548 | } | |
549 | long endTime = fScaledData.getBucketEndTime(fScaledData.fCurrentBucket); | |
74237cc3 | 550 | int nbEvents = (index >= 0) ? fScaledData.fData[index] : 0; |
c392540b FC |
551 | |
552 | StringBuffer buffer = new StringBuffer(); | |
553 | buffer.append("Range = ["); //$NON-NLS-1$ | |
554 | buffer.append(HistogramUtils.nanosecondsToString(startTime)); | |
555 | buffer.append(","); //$NON-NLS-1$ | |
556 | buffer.append(HistogramUtils.nanosecondsToString(endTime)); | |
557 | buffer.append(")\n"); //$NON-NLS-1$ | |
558 | buffer.append("Event count = "); //$NON-NLS-1$ | |
559 | buffer.append(nbEvents); | |
560 | return buffer.toString(); | |
561 | } | |
562 | ||
563 | // ------------------------------------------------------------------------ | |
564 | // ControlListener | |
565 | // ------------------------------------------------------------------------ | |
566 | ||
567 | @Override | |
568 | public void controlMoved(ControlEvent event) { | |
fbd124dd | 569 | fDataModel.complete(); |
c392540b FC |
570 | } |
571 | ||
572 | @Override | |
573 | public void controlResized(ControlEvent event) { | |
fbd124dd | 574 | fDataModel.complete(); |
c392540b | 575 | } |
c392540b | 576 | } |