org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/viewers/TmfTimeViewer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2014 École Polytechnique de Montréal
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann - Initial API and implementation in TmfXYChartViewer
  11  *   Geneviève Bastien - Moved methods from TmfXYChartViewer to this interface
  12  *******************************************************************************/
  13
  14 package org.eclipse.linuxtools.tmf.ui.viewers;
  15
  16 import org.eclipse.linuxtools.tmf.core.signal.TmfRangeSynchSignal;
  17 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalHandler;
  18 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalThrottler;
  19 import org.eclipse.linuxtools.tmf.core.signal.TmfTimeSynchSignal;
  20 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceClosedSignal;
  21 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceOpenedSignal;
  22 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceRangeUpdatedSignal;
  23 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceSelectedSignal;
  24 import org.eclipse.linuxtools.tmf.core.signal.TmfTraceUpdatedSignal;
  25 import org.eclipse.linuxtools.tmf.core.timestamp.ITmfTimestamp;
  26 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimeRange;
  27 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestamp;
  28 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  29 import org.eclipse.linuxtools.tmf.core.trace.TmfTraceManager;
  30 import org.eclipse.swt.widgets.Composite;
  31
  32 /**
  33  * Abstract class that extends {@link TmfViewer} that adds methods to
  34  * synchronize with a trace's time information.
  35  *
  36  * This class will be extended by viewers who require time information to update
  37  * their content.
  38  *
  39  * <pre>
  40  * It provides three times of data:
  41  *   - start and end time of the trace (available)
  42  *   - start, end and duration of the current time window, ie the visible time range
  43  *   - start and end of the time range selected
  44  * </pre>
  45  *
  46  * @author Bernd Hufmann
  47  * @author Geneviève Bastien
  48  * @since 3.0
  49  */
  50 public abstract class TmfTimeViewer extends TmfViewer implements ITmfTimeProvider {
  51
  52     /** Start time of trace */
  53     private long fStartTime;
  54     /** End time of trace */
  55     private long fEndTime;
  56     /** Start time of current time range */
  57     private long fWindowStartTime;
  58     /** End time of current time range */
  59     private long fWindowEndTime;
  60     /** Duration of current time range */
  61     private long fWindowDuration;
  62     /** Current begin time of selection range */
  63     private long fSelectionBeginTime;
  64     /** Current end of selection range */
  65     private long fSelectionEndTime;
  66     /** The trace that is displayed by this viewer */
  67     private ITmfTrace fTrace;
  68     /** A signal throttler for range updates */
  69     private final TmfSignalThrottler fTimeRangeSyncThrottle = new TmfSignalThrottler(this, 200);
  70
  71     /**
  72      * Default constructor.
  73      */
  74     public TmfTimeViewer() {
  75         super();
  76     }
  77
  78     /**
  79      * Constructor that initializes the parent of the viewer
  80      *
  81      * @param parent
  82      *            The parent composite that holds this viewer
  83      */
  84     public TmfTimeViewer(Composite parent) {
  85         this(parent, ""); //$NON-NLS-1$
  86     }
  87
  88     /**
  89      * Constructor that initializes the parent of the viewer and that sets the
  90      * name of the viewer
  91      *
  92      * @param parent
  93      *            The parent composite that holds this viewer
  94      * @param name
  95      *            The name of the viewer
  96      */
  97     public TmfTimeViewer(Composite parent, String name) {
  98         init(parent, name);
  99     }
 100
 101     // ------------------------------------------------------------------------
 102     // Getter/Setters
 103     // ------------------------------------------------------------------------
 104
 105     /**
 106      * Sets the start time of the trace
 107      *
 108      * @param startTime
 109      *            The start time to set
 110      */
 111     protected void setStartTime(long startTime) {
 112         fStartTime = startTime;
 113     }
 114
 115     /**
 116      * Sets the end time of the trace
 117      *
 118      * @param endTime
 119      *            The start time to set
 120      */
 121     protected void setEndTime(long endTime) {
 122         fEndTime = endTime;
 123     }
 124
 125     /**
 126      * Sets the start time of the current time range window (visible range)
 127      *
 128      * @param windowStartTime
 129      *            The start time to set
 130      */
 131     protected void setWindowStartTime(long windowStartTime) {
 132         fWindowStartTime = windowStartTime;
 133     }
 134
 135     /**
 136      * Sets the end time of the current time range window (visible range)
 137      *
 138      * @param windowEndTime
 139      *            The start time to set
 140      */
 141     protected void setWindowEndTime(long windowEndTime) {
 142         fWindowEndTime = windowEndTime;
 143     }
 144
 145     /**
 146      * Sets the duration of the current time range window (visible range)
 147      *
 148      * @param windowDuration
 149      *            The window duration
 150      */
 151     protected void setWindowDuration(long windowDuration) {
 152         fWindowDuration = windowDuration;
 153     }
 154
 155     /**
 156      * Sets the begin time of the selected range.
 157      *
 158      * @param selectionBeginTime
 159      *            The begin time to set
 160      */
 161     protected void setSelectionBeginTime(long selectionBeginTime) {
 162         fSelectionBeginTime = selectionBeginTime;
 163     }
 164
 165     /**
 166      * Sets the end time of the selected range.
 167      *
 168      * @param selectionEndTime
 169      *            The end time to set
 170      */
 171     protected void setSelectionEndTime(long selectionEndTime) {
 172         fSelectionEndTime = selectionEndTime;
 173     }
 174
 175     /**
 176      * Sets the trace that is displayed by this viewer.
 177      *
 178      * @param trace
 179      *            The trace to set
 180      */
 181     protected void setTrace(ITmfTrace trace) {
 182         fTrace = trace;
 183     }
 184
 185     /**
 186      * Gets the trace that is displayed by this viewer.
 187      *
 188      * @return the trace
 189      */
 190     protected ITmfTrace getTrace() {
 191         return fTrace;
 192     }
 193
 194     // ------------------------------------------------------------------------
 195     // ITmfTimeProvider
 196     // ------------------------------------------------------------------------
 197
 198     @Override
 199     public long getStartTime() {
 200         return fStartTime;
 201     }
 202
 203     @Override
 204     public long getEndTime() {
 205         return fEndTime;
 206     }
 207
 208     @Override
 209     public long getWindowStartTime() {
 210         return fWindowStartTime;
 211     }
 212
 213     @Override
 214     public long getWindowEndTime() {
 215         return fWindowEndTime;
 216     }
 217
 218     @Override
 219     public long getWindowDuration() {
 220         return fWindowDuration;
 221     }
 222
 223     @Override
 224     public long getSelectionBeginTime() {
 225         return fSelectionBeginTime;
 226     }
 227
 228     @Override
 229     public long getSelectionEndTime() {
 230         return fSelectionEndTime;
 231     }
 232
 233     @Override
 234     public void updateSelectionRange(final long currentBeginTime, final long currentEndTime) {
 235         if (fTrace != null) {
 236             setSelectionBeginTime(currentBeginTime);
 237             setSelectionEndTime(currentEndTime);
 238
 239             final ITmfTimestamp startTimestamp = new TmfTimestamp(getSelectionBeginTime(), ITmfTimestamp.NANOSECOND_SCALE);
 240             final ITmfTimestamp endTimestamp = new TmfTimestamp(getSelectionEndTime(), ITmfTimestamp.NANOSECOND_SCALE);
 241
 242             TmfTimeSynchSignal signal = new TmfTimeSynchSignal(this, startTimestamp, endTimestamp);
 243             broadcast(signal);
 244         }
 245     }
 246
 247     @Override
 248     public void updateWindow(long windowStartTime, long windowEndTime) {
 249
 250         setWindowStartTime(windowStartTime);
 251         setWindowEndTime(windowEndTime);
 252         setWindowDuration(windowEndTime - windowStartTime);
 253
 254         // Build the new time range; keep the current time
 255         TmfTimeRange timeRange = new TmfTimeRange(
 256                 new TmfTimestamp(getWindowStartTime(), ITmfTimestamp.NANOSECOND_SCALE),
 257                 new TmfTimestamp(getWindowEndTime(), ITmfTimestamp.NANOSECOND_SCALE));
 258
 259         // Send the signal
 260         TmfRangeSynchSignal signal = new TmfRangeSynchSignal(this, timeRange);
 261         fTimeRangeSyncThrottle.queue(signal);
 262     }
 263
 264     // ------------------------------------------------------------------------
 265     // Operations
 266     // ------------------------------------------------------------------------
 267     /**
 268      * A Method to load a trace into the viewer.
 269      *
 270      * @param trace
 271      *            A trace to apply in the viewer
 272      */
 273     public void loadTrace(ITmfTrace trace) {
 274         fTrace = trace;
 275
 276         long timestamp = TmfTraceManager.getInstance().getSelectionBeginTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 277         long windowStartTime = TmfTraceManager.getInstance().getCurrentRange().getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 278         long startTime = fTrace.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 279         long endTime = fTrace.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 280
 281         setSelectionBeginTime(timestamp);
 282         setSelectionEndTime(timestamp);
 283         setStartTime(startTime);
 284         setWindowStartTime(windowStartTime);
 285         setWindowDuration(fTrace.getInitialRangeOffset().getValue());
 286         setEndTime(endTime);
 287         setWindowEndTime(windowStartTime + getWindowDuration());
 288     }
 289
 290     /**
 291      * Resets the content of the viewer
 292      */
 293     public void reset() {
 294         // Reset the internal data
 295         setSelectionBeginTime(0);
 296         setSelectionEndTime(0);
 297         setStartTime(0);
 298         setWindowStartTime(0);
 299         setWindowDuration(0);
 300         setEndTime(0);
 301         setWindowEndTime(0);
 302         setTrace(null);
 303     }
 304
 305     // ------------------------------------------------------------------------
 306     // Signal Handler
 307     // ------------------------------------------------------------------------
 308
 309     /**
 310      * Signal handler for handling of the trace opened signal.
 311      *
 312      * @param signal
 313      *            The trace opened signal {@link TmfTraceOpenedSignal}
 314      */
 315     @TmfSignalHandler
 316     public void traceOpened(TmfTraceOpenedSignal signal) {
 317         fTrace = signal.getTrace();
 318         loadTrace(getTrace());
 319     }
 320
 321     /**
 322      * Signal handler for handling of the trace selected signal.
 323      *
 324      * @param signal
 325      *            The trace selected signal {@link TmfTraceSelectedSignal}
 326      */
 327     @TmfSignalHandler
 328     public void traceSelected(TmfTraceSelectedSignal signal) {
 329         if (fTrace != signal.getTrace()) {
 330             fTrace = signal.getTrace();
 331             loadTrace(getTrace());
 332         }
 333     }
 334
 335     /**
 336      * Signal handler for handling of the trace closed signal.
 337      *
 338      * @param signal
 339      *            The trace closed signal {@link TmfTraceClosedSignal}
 340      */
 341     @TmfSignalHandler
 342     public void traceClosed(TmfTraceClosedSignal signal) {
 343
 344         if (signal.getTrace() != fTrace) {
 345             return;
 346         }
 347
 348         // Reset the internal data
 349         fTrace = null;
 350         reset();
 351     }
 352
 353     /**
 354      * Signal handler for handling of the time synch signal, ie the selected range.
 355      *
 356      * @param signal
 357      *            The time synch signal {@link TmfTimeSynchSignal}
 358      */
 359     @TmfSignalHandler
 360     public void selectionRangeUpdated(TmfTimeSynchSignal signal) {
 361         if ((signal.getSource() != this) && (fTrace != null)) {
 362             ITmfTimestamp selectedTime = signal.getBeginTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE);
 363             ITmfTimestamp selectedEndTime = signal.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE);
 364             setSelectionBeginTime(selectedTime.getValue());
 365             setSelectionEndTime(selectedEndTime.getValue());
 366         }
 367     }
 368
 369     /**
 370      * Signal handler for handling of the time range synch signal, ie the visible range.
 371      *
 372      * @param signal
 373      *            The time range synch signal {@link TmfRangeSynchSignal}
 374      */
 375     @TmfSignalHandler
 376     public void timeRangeUpdated(TmfRangeSynchSignal signal) {
 377
 378         if (fTrace != null) {
 379             // Validate the time range
 380             TmfTimeRange range = signal.getCurrentRange().getIntersection(fTrace.getTimeRange());
 381             if (range == null) {
 382                 return;
 383             }
 384
 385             if (signal.getSource() != this) {
 386                 // Update the time range
 387                 long windowStartTime = range.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 388                 long windowEndTime = range.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 389                 long windowDuration = windowEndTime - windowStartTime;
 390
 391                 setWindowStartTime(windowStartTime);
 392                 setWindowEndTime(windowEndTime);
 393                 setWindowDuration(windowDuration);
 394             }
 395         }
 396     }
 397
 398     /**
 399      * Signal handler for handling of the trace range updated signal.
 400      *
 401      * @param signal
 402      *            The trace range signal {@link TmfTraceRangeUpdatedSignal}
 403      */
 404     @TmfSignalHandler
 405     public void traceRangeUpdated(TmfTraceRangeUpdatedSignal signal) {
 406
 407         if (signal.getTrace() != fTrace) {
 408             return;
 409         }
 410
 411         TmfTimeRange fullRange = signal.getRange();
 412
 413         long traceStartTime = fullRange.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 414         long traceEndTime = fullRange.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 415
 416         setStartTime(traceStartTime);
 417         setEndTime(traceEndTime);
 418     }
 419
 420     /**
 421      * Signal handler for handling of the trace updated signal.
 422      *
 423      * @param signal
 424      *            The trace updated signal {@link TmfTraceUpdatedSignal}
 425      */
 426     @TmfSignalHandler
 427     public void traceUpdated(TmfTraceUpdatedSignal signal) {
 428         if (signal.getTrace() != fTrace) {
 429             return;
 430         }
 431         TmfTimeRange fullRange = signal.getTrace().getTimeRange();
 432         long traceStartTime = fullRange.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 433         long traceEndTime = fullRange.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 434
 435         setStartTime(traceStartTime);
 436         setEndTime(traceEndTime);
 437     }
 438
 439 }