org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/HistogramView.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2010, 2011, 2012 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  *   William Bourque - Initial API and implementation
  11  *   Yuriy Vashchuk - GUI reorganisation, simplification and some related code improvements.
  12  *   Yuriy Vashchuk - Histograms optimisation.
  13  *   Yuriy Vashchuk - Histogram Canvas Heritage correction
  14  *   Francois Chouinard - Cleanup and refactoring
  15  *   Francois Chouinard - Moved from LTTng to TMF
  16  *******************************************************************************/
  17
  18 package org.eclipse.linuxtools.tmf.ui.views.histogram;
  19
  20 import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
  21 import org.eclipse.linuxtools.tmf.core.request.ITmfDataRequest.ExecutionType;
  22 import org.eclipse.linuxtools.tmf.core.request.TmfDataRequest;
  23 import org.eclipse.linuxtools.tmf.core.signal.TmfRangeSynchSignal;
  24 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalHandler;
  25 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalManager;
  26 import org.eclipse.linuxtools.tmf.core.signal.TmfTimeSynchSignal;
  27 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceClosedSignal;
  28 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceOpenedSignal;
  29 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceRangeUpdatedSignal;
  30 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceSelectedSignal;
  31 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceUpdatedSignal;
  32 import org.eclipse.linuxtools.tmf.core.timestamp.ITmfTimestamp;
  33 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimeRange;
  34 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestamp;
  35 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  36 import org.eclipse.linuxtools.tmf.ui.editors.ITmfTraceEditor;
  37 import org.eclipse.linuxtools.tmf.ui.views.TmfView;
  38 import org.eclipse.swt.SWT;
  39 import org.eclipse.swt.layout.GridData;
  40 import org.eclipse.swt.layout.GridLayout;
  41 import org.eclipse.swt.widgets.Composite;
  42 import org.eclipse.ui.IEditorPart;
  43
  44 /**
  45  * The purpose of this view is to provide graphical time distribution statistics about the trace events.
  46  * <p>
  47  * The view is composed of two histograms and two controls:
  48  * <ul>
  49  * <li>an event distribution histogram for the whole trace;
  50  * <li>an event distribution histogram for current time window (window span);
  51  * <li>the timestamp of the currently selected event;
  52  * <li>the window span (size of the time window of the smaller histogram).
  53  * </ul>
  54  * The histograms x-axis show their respective time range.
  55  *
  56  * @version 2.0
  57  * @author Francois Chouinard
  58  */
  59 public class HistogramView extends TmfView {
  60
  61     // ------------------------------------------------------------------------
  62     // Constants
  63     // ------------------------------------------------------------------------
  64
  65     /**
  66      *  The view ID as defined in plugin.xml
  67      */
  68     public static final String ID = "org.eclipse.linuxtools.tmf.ui.views.histogram"; //$NON-NLS-1$
  69
  70     // ------------------------------------------------------------------------
  71     // Attributes
  72     // ------------------------------------------------------------------------
  73
  74     // Parent widget
  75     private Composite fParent;
  76
  77     // The current trace
  78     private ITmfTrace fTrace;
  79
  80     // Current timestamp/time window - everything in the TIME_SCALE
  81     private long fTraceStartTime;
  82     private long fTraceEndTime;
  83     private long fWindowStartTime;
  84     private long fWindowEndTime;
  85     private long fWindowSpan;
  86     private long fCurrentTimestamp;
  87
  88     // Time controls
  89     private HistogramTextControl fCurrentEventTimeControl;
  90     private HistogramTextControl fTimeSpanControl;
  91
  92     // Histogram/request for the full trace range
  93     private static FullTraceHistogram fFullTraceHistogram;
  94     private HistogramRequest fFullTraceRequest;
  95
  96     // Histogram/request for the selected time range
  97     private static TimeRangeHistogram fTimeRangeHistogram;
  98     private HistogramRequest fTimeRangeRequest;
  99
 100     // ------------------------------------------------------------------------
 101     // Constructor
 102     // ------------------------------------------------------------------------
 103
 104     /**
 105      * Default constructor
 106      */
 107     public HistogramView() {
 108         super(ID);
 109     }
 110
 111     @Override
 112     public void dispose() {
 113         if ((fTimeRangeRequest != null) && !fTimeRangeRequest.isCompleted()) {
 114             fTimeRangeRequest.cancel();
 115         }
 116         if ((fFullTraceRequest != null) && !fFullTraceRequest.isCompleted()) {
 117             fFullTraceRequest.cancel();
 118         }
 119         fFullTraceHistogram.dispose();
 120         fTimeRangeHistogram.dispose();
 121         fCurrentEventTimeControl.dispose();
 122         fTimeSpanControl.dispose();
 123         super.dispose();
 124     }
 125
 126     // ------------------------------------------------------------------------
 127     // TmfView
 128     // ------------------------------------------------------------------------
 129
 130     @Override
 131     public void createPartControl(Composite parent) {
 132
 133         fParent = parent;
 134
 135         // Control labels
 136         final String currentEventLabel = Messages.HistogramView_currentEventLabel;
 137         final String windowSpanLabel = Messages.HistogramView_windowSpanLabel;
 138
 139         // --------------------------------------------------------------------
 140         // Set the HistogramView layout
 141         // --------------------------------------------------------------------
 142
 143         Composite viewComposite = new Composite(fParent, SWT.FILL);
 144         GridLayout gridLayout = new GridLayout();
 145         gridLayout.numColumns = 2;
 146         gridLayout.horizontalSpacing = 5;
 147         gridLayout.verticalSpacing = 0;
 148         gridLayout.marginHeight = 0;
 149         gridLayout.marginWidth = 0;
 150         viewComposite.setLayout(gridLayout);
 151
 152         // Use all available space
 153         GridData gridData = new GridData();
 154         gridData.horizontalAlignment = SWT.FILL;
 155         gridData.verticalAlignment = SWT.FILL;
 156         gridData.grabExcessHorizontalSpace = true;
 157         viewComposite.setLayoutData(gridData);
 158
 159         // --------------------------------------------------------------------
 160         // Time controls
 161         // --------------------------------------------------------------------
 162
 163         Composite controlsComposite = new Composite(viewComposite, SWT.FILL);
 164         gridLayout = new GridLayout();
 165         gridLayout.numColumns = 2;
 166         gridLayout.marginHeight = 0;
 167         gridLayout.marginWidth = 0;
 168         gridLayout.horizontalSpacing = 5;
 169         gridLayout.verticalSpacing = 0;
 170         gridLayout.makeColumnsEqualWidth = false;
 171         gridLayout.marginLeft = 5;
 172         gridLayout.marginRight = 5;
 173         controlsComposite.setLayout(gridLayout);
 174
 175         // Current event time control
 176         gridData = new GridData();
 177         gridData.horizontalAlignment = SWT.CENTER;
 178         gridData.verticalAlignment = SWT.CENTER;
 179         fCurrentEventTimeControl = new HistogramCurrentTimeControl(this, controlsComposite, currentEventLabel, 0L);
 180         fCurrentEventTimeControl.setLayoutData(gridData);
 181         fCurrentEventTimeControl.setValue(Long.MIN_VALUE);
 182
 183         // Window span time control
 184         gridData = new GridData();
 185         gridData.horizontalAlignment = SWT.CENTER;
 186         gridData.verticalAlignment = SWT.CENTER;
 187         fTimeSpanControl = new HistogramTimeRangeControl(this, controlsComposite, windowSpanLabel, 0L);
 188         fTimeSpanControl.setLayoutData(gridData);
 189         fTimeSpanControl.setValue(Long.MIN_VALUE);
 190
 191         // --------------------------------------------------------------------
 192         // Time range histogram
 193         // --------------------------------------------------------------------
 194
 195         Composite timeRangeComposite = new Composite(viewComposite, SWT.FILL);
 196         gridLayout = new GridLayout();
 197         gridLayout.numColumns = 1;
 198         gridLayout.marginHeight = 0;
 199         gridLayout.marginWidth = 0;
 200         gridLayout.marginTop = 5;
 201         gridLayout.horizontalSpacing = 0;
 202         gridLayout.verticalSpacing = 0;
 203         gridLayout.marginLeft = 5;
 204         gridLayout.marginRight = 5;
 205         timeRangeComposite.setLayout(gridLayout);
 206
 207         // Use remaining horizontal space
 208         gridData = new GridData();
 209         gridData.horizontalAlignment = SWT.FILL;
 210         gridData.verticalAlignment = SWT.FILL;
 211         gridData.grabExcessHorizontalSpace = true;
 212         timeRangeComposite.setLayoutData(gridData);
 213
 214         // Histogram
 215         fTimeRangeHistogram = new TimeRangeHistogram(this, timeRangeComposite);
 216
 217         // --------------------------------------------------------------------
 218         // Full range histogram
 219         // --------------------------------------------------------------------
 220
 221         Composite fullRangeComposite = new Composite(viewComposite, SWT.FILL);
 222         gridLayout = new GridLayout();
 223         gridLayout.numColumns = 1;
 224         gridLayout.marginHeight = 0;
 225         gridLayout.marginWidth = 0;
 226         gridLayout.marginTop = 5;
 227         gridLayout.horizontalSpacing = 0;
 228         gridLayout.verticalSpacing = 0;
 229         gridLayout.marginLeft = 5;
 230         gridLayout.marginRight = 5;
 231         fullRangeComposite.setLayout(gridLayout);
 232
 233         // Use remaining horizontal space
 234         gridData = new GridData();
 235         gridData.horizontalAlignment = SWT.FILL;
 236         gridData.verticalAlignment = SWT.FILL;
 237         gridData.horizontalSpan = 2;
 238         gridData.grabExcessHorizontalSpace = true;
 239         fullRangeComposite.setLayoutData(gridData);
 240
 241         // Histogram
 242         fFullTraceHistogram = new FullTraceHistogram(this, fullRangeComposite);
 243
 244         IEditorPart editor = getSite().getPage().getActiveEditor();
 245         if (editor instanceof ITmfTraceEditor) {
 246             ITmfTrace trace = ((ITmfTraceEditor) editor).getTrace();
 247             if (trace != null) {
 248                 traceSelected(new TmfTraceSelectedSignal(this, trace));
 249             }
 250         }
 251     }
 252
 253     @Override
 254     public void setFocus() {
 255         fFullTraceHistogram.fCanvas.setFocus();
 256     }
 257
 258     void refresh() {
 259         fParent.layout(true);
 260     }
 261
 262     // ------------------------------------------------------------------------
 263     // Accessors
 264     // ------------------------------------------------------------------------
 265
 266     /**
 267      * Returns the current trace handled by the view
 268      *
 269      * @return the current trace
 270      * @since 2.0
 271      */
 272     public ITmfTrace getTrace() {
 273         return fTrace;
 274     }
 275
 276     /**
 277      * Returns the time range of the current selected window (base on default time scale).
 278      *
 279      * @return the time range of current selected window.
 280      * @since 2.0
 281      */
 282     public TmfTimeRange getTimeRange() {
 283         return new TmfTimeRange(
 284                 new TmfTimestamp(fWindowStartTime, ITmfTimestamp.NANOSECOND_SCALE),
 285                 new TmfTimestamp(fWindowEndTime, ITmfTimestamp.NANOSECOND_SCALE));
 286     }
 287
 288     // ------------------------------------------------------------------------
 289     // Operations
 290     // ------------------------------------------------------------------------
 291
 292     /**
 293      * Broadcast TmfSignal about new current time value.
 294      * @param newTime the new current time.
 295      */
 296     void updateCurrentEventTime(long newTime) {
 297         if (fTrace != null) {
 298             TmfTimeRange timeRange = new TmfTimeRange(new TmfTimestamp(newTime, ITmfTimestamp.NANOSECOND_SCALE), TmfTimestamp.BIG_CRUNCH);
 299             HistogramRequest request = new HistogramRequest(fTimeRangeHistogram.getDataModel(), timeRange, 0, 1, 0, ExecutionType.FOREGROUND) {
 300                 @Override
 301                 public void handleData(ITmfEvent event) {
 302                     if (event != null) {
 303                         TmfTimeSynchSignal signal = new TmfTimeSynchSignal(this, event.getTimestamp());
 304                         TmfSignalManager.dispatchSignal(signal);
 305                     }
 306                 }
 307             };
 308             fTrace.sendRequest(request);
 309         }
 310     }
 311
 312     /**
 313      * Broadcast TmfSignal about new selected time range.
 314      * @param startTime the new start time
 315      * @param endTime the new end time
 316      */
 317     void updateTimeRange(long startTime, long endTime) {
 318         if (fTrace != null) {
 319             // Build the new time range; keep the current time
 320             TmfTimeRange timeRange = new TmfTimeRange(
 321                     new TmfTimestamp(startTime, ITmfTimestamp.NANOSECOND_SCALE),
 322                     new TmfTimestamp(endTime, ITmfTimestamp.NANOSECOND_SCALE));
 323             ITmfTimestamp currentTime = new TmfTimestamp(fCurrentTimestamp, ITmfTimestamp.NANOSECOND_SCALE);
 324             fTimeSpanControl.setValue(endTime - startTime);
 325
 326             // Send the FW signal
 327             TmfRangeSynchSignal signal = new TmfRangeSynchSignal(this, timeRange, currentTime);
 328             TmfSignalManager.dispatchSignal(signal);
 329         }
 330     }
 331
 332     /**
 333      * Broadcast TmfSignal about new selected time range.
 334      * @param newDuration new duration (relative to current start time)
 335      */
 336     public synchronized void updateTimeRange(long newDuration) {
 337         if (fTrace != null) {
 338             long delta = newDuration - fWindowSpan;
 339             long newStartTime = fWindowStartTime - (delta / 2);
 340             setNewRange(newStartTime, newDuration);
 341         }
 342     }
 343
 344     private void setNewRange(long startTime, long duration) {
 345         long realStart = startTime;
 346
 347         if (realStart < fTraceStartTime) {
 348             realStart = fTraceStartTime;
 349         }
 350
 351         long endTime = realStart + duration;
 352         if (endTime > fTraceEndTime) {
 353             endTime = fTraceEndTime;
 354             if ((endTime - duration) > fTraceStartTime) {
 355                 realStart = endTime - duration;
 356             } else {
 357                 realStart = fTraceStartTime;
 358             }
 359         }
 360         updateTimeRange(realStart, endTime);
 361     }
 362
 363     // ------------------------------------------------------------------------
 364     // Signal handlers
 365     // ------------------------------------------------------------------------
 366
 367     /**
 368      * Handles trace opened signal. Loads histogram if new trace time range is not
 369      * equal <code>TmfTimeRange.NULL_RANGE</code>
 370      * @param signal the trace selected signal
 371      * @since 2.0
 372      */
 373     @TmfSignalHandler
 374     public void traceOpened(TmfTraceOpenedSignal signal) {
 375         assert (signal != null);
 376         fTrace = signal.getTrace();
 377         loadTrace();
 378     }
 379
 380     /**
 381      * Handles trace selected signal. Loads histogram if new trace time range is not
 382      * equal <code>TmfTimeRange.NULL_RANGE</code>
 383      * @param signal the trace selected signal
 384      * @since 2.0
 385      */
 386     @TmfSignalHandler
 387     public void traceSelected(TmfTraceSelectedSignal signal) {
 388         assert (signal != null);
 389         if (fTrace != signal.getTrace()) {
 390             fTrace = signal.getTrace();
 391             loadTrace();
 392         }
 393     }
 394
 395     private void loadTrace() {
 396         initializeHistograms();
 397         fParent.redraw();
 398     }
 399
 400     /**
 401      * Handles trace closed signal. Clears the view and data model and cancels requests.
 402      * @param signal the trace closed signal
 403      * @since 2.0
 404      */
 405     @TmfSignalHandler
 406     public void traceClosed(TmfTraceClosedSignal signal) {
 407
 408         if (signal.getTrace() != fTrace) {
 409             return;
 410         }
 411
 412         // Kill any running request
 413         if ((fTimeRangeRequest != null) && !fTimeRangeRequest.isCompleted()) {
 414             fTimeRangeRequest.cancel();
 415         }
 416         if ((fFullTraceRequest != null) && !fFullTraceRequest.isCompleted()) {
 417             fFullTraceRequest.cancel();
 418         }
 419
 420         // Initialize the internal data
 421         fTrace = null;
 422         fTraceStartTime = 0L;
 423         fTraceEndTime = 0L;
 424         fWindowStartTime = 0L;
 425         fWindowEndTime = 0L;
 426         fWindowSpan = 0L;
 427         fCurrentTimestamp = 0L;
 428
 429         // Clear the UI widgets
 430         fFullTraceHistogram.clear();
 431         fTimeRangeHistogram.clear();
 432         fCurrentEventTimeControl.setValue(Long.MIN_VALUE);
 433
 434         fTimeSpanControl.setValue(Long.MIN_VALUE);
 435     }
 436
 437     /**
 438      * Handles trace range updated signal. Extends histogram according to the new time range. If a
 439      * HistogramRequest is already ongoing, it will be cancelled and a new request with the new range
 440      * will be issued.
 441      *
 442      * @param signal the trace range updated signal
 443      * @since 2.0
 444      */
 445     @TmfSignalHandler
 446     public void traceRangeUpdated(TmfTraceRangeUpdatedSignal signal) {
 447
 448         if (signal.getTrace() != fTrace) {
 449             return;
 450         }
 451
 452         TmfTimeRange fullRange = signal.getRange();
 453
 454         fTraceStartTime = fullRange.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 455         fTraceEndTime = fullRange.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 456
 457         fFullTraceHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 458         fTimeRangeHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 459
 460         sendFullRangeRequest(fullRange);
 461     }
 462
 463     /**
 464      * Handles the trace updated signal. Used to update time limits (start and end time)
 465      * @param signal the trace updated signal
 466      * @since 2.0
 467      */
 468     @TmfSignalHandler
 469     public void traceUpdated(TmfTraceUpdatedSignal signal) {
 470         if (signal.getTrace() != fTrace) {
 471             return;
 472         }
 473         TmfTimeRange fullRange = signal.getTrace().getTimeRange();
 474         fTraceStartTime = fullRange.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 475         fTraceEndTime = fullRange.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 476
 477         fFullTraceHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 478         fTimeRangeHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 479
 480         fFullTraceHistogram.setTimeRange(fTimeRangeHistogram.getStartTime(), fWindowSpan);
 481         fTimeRangeHistogram.setTimeRange(fTimeRangeHistogram.getStartTime(), fWindowSpan);
 482
 483         if ((fFullTraceRequest != null) && fFullTraceRequest.getRange().getEndTime().compareTo(signal.getRange().getEndTime()) < 0) {
 484             sendFullRangeRequest(fullRange);
 485         }
 486 }
 487
 488     /**
 489      * Handles the current time updated signal. Sets the current time in the time range
 490      * histogram as well as the full histogram.
 491      *
 492      * @param signal the signal to process
 493      */
 494     @TmfSignalHandler
 495     public void currentTimeUpdated(TmfTimeSynchSignal signal) {
 496         // Because this can't happen :-)
 497         assert (signal != null);
 498
 499         // Update the selected event time
 500         ITmfTimestamp currentTime = signal.getCurrentTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE);
 501         fCurrentTimestamp = currentTime.getValue();
 502
 503         // Notify the relevant widgets
 504         fFullTraceHistogram.setCurrentEvent(fCurrentTimestamp);
 505         fTimeRangeHistogram.setCurrentEvent(fCurrentTimestamp);
 506         fCurrentEventTimeControl.setValue(fCurrentTimestamp);
 507     }
 508
 509     /**
 510      * Updates the current time range in the time range histogram and full range histogram.
 511      * @param signal the signal to process
 512      */
 513     @TmfSignalHandler
 514     public void timeRangeUpdated(TmfRangeSynchSignal signal) {
 515         // Because this can't happen :-)
 516         assert (signal != null);
 517
 518         if (fTrace != null) {
 519             // Validate the time range
 520             TmfTimeRange range = signal.getCurrentRange().getIntersection(fTrace.getTimeRange());
 521             if (range == null) {
 522                 return;
 523             }
 524
 525             // Update the time range
 526             fWindowStartTime = range.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 527             fWindowEndTime = range.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 528             fWindowSpan = fWindowEndTime - fWindowStartTime;
 529
 530             // Notify the relevant widgets
 531             sendTimeRangeRequest(fWindowStartTime, fWindowEndTime);
 532             fFullTraceHistogram.setTimeRange(fWindowStartTime, fWindowSpan);
 533
 534             fTimeSpanControl.setValue(fWindowSpan);
 535         }
 536     }
 537
 538     // ------------------------------------------------------------------------
 539     // Helper functions
 540     // ------------------------------------------------------------------------
 541
 542     private void initializeHistograms() {
 543         TmfTimeRange fullRange = updateTraceTimeRange();
 544         long timestamp = fTrace.getCurrentTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 545         long startTime = fTrace.getCurrentRange().getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 546         long duration = fTrace.getCurrentRange().getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue() - startTime;
 547
 548         if ((fTimeRangeRequest != null) && !fTimeRangeRequest.isCompleted()) {
 549             fTimeRangeRequest.cancel();
 550         }
 551         fTimeRangeHistogram.clear();
 552         fTimeRangeHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 553         fTimeRangeHistogram.setTimeRange(startTime, duration);
 554         fTimeRangeHistogram.setCurrentEvent(timestamp);
 555
 556         if ((fFullTraceRequest != null) && !fFullTraceRequest.isCompleted()) {
 557             fFullTraceRequest.cancel();
 558         }
 559         fFullTraceHistogram.clear();
 560         fFullTraceHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 561         fFullTraceHistogram.setTimeRange(startTime, duration);
 562         fFullTraceHistogram.setCurrentEvent(timestamp);
 563
 564         fWindowStartTime = startTime;
 565         fWindowSpan = duration;
 566         fWindowEndTime = startTime + duration;
 567
 568         fCurrentTimestamp = timestamp;
 569         fCurrentEventTimeControl.setValue(fCurrentTimestamp);
 570
 571         fTimeSpanControl.setValue(duration);
 572
 573         if (!fullRange.equals(TmfTimeRange.NULL_RANGE)) {
 574             sendTimeRangeRequest(startTime, startTime + duration);
 575             sendFullRangeRequest(fullRange);
 576         }
 577     }
 578
 579     private TmfTimeRange updateTraceTimeRange() {
 580         fTraceStartTime = 0L;
 581         fTraceEndTime = 0L;
 582
 583         TmfTimeRange timeRange = fTrace.getTimeRange();
 584         if (!timeRange.equals(TmfTimeRange.NULL_RANGE)) {
 585             fTraceStartTime = timeRange.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 586             fTraceEndTime = timeRange.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 587         }
 588         return timeRange;
 589     }
 590
 591     private void sendTimeRangeRequest(long startTime, long endTime) {
 592         if ((fTimeRangeRequest != null) && !fTimeRangeRequest.isCompleted()) {
 593             fTimeRangeRequest.cancel();
 594         }
 595         TmfTimestamp startTS = new TmfTimestamp(startTime, ITmfTimestamp.NANOSECOND_SCALE);
 596         TmfTimestamp endTS = new TmfTimestamp(endTime, ITmfTimestamp.NANOSECOND_SCALE);
 597         TmfTimeRange timeRange = new TmfTimeRange(startTS, endTS);
 598
 599         fTimeRangeHistogram.clear();
 600         fTimeRangeHistogram.setFullRange(fTraceStartTime, fTraceEndTime);
 601         fTimeRangeHistogram.setTimeRange(startTime, endTime - startTime);
 602
 603         int cacheSize = fTrace.getCacheSize();
 604         fTimeRangeRequest = new HistogramRequest(fTimeRangeHistogram.getDataModel(), timeRange, 0, TmfDataRequest.ALL_DATA, cacheSize, ExecutionType.FOREGROUND);
 605         fTrace.sendRequest(fTimeRangeRequest);
 606     }
 607
 608     private void sendFullRangeRequest(TmfTimeRange fullRange) {
 609         if ((fFullTraceRequest != null) && !fFullTraceRequest.isCompleted()) {
 610             fFullTraceRequest.cancel();
 611         }
 612         int cacheSize = fTrace.getCacheSize();
 613         fFullTraceRequest = new HistogramRequest(fFullTraceHistogram.getDataModel(), fullRange, (int) fFullTraceHistogram.fDataModel.getNbEvents(),
 614                 TmfDataRequest.ALL_DATA, cacheSize, ExecutionType.BACKGROUND);
 615         fTrace.sendRequest(fFullTraceRequest);
 616     }
 617
 618 }