doc/org.eclipse.tracecompass.examples/src/org/eclipse/tracecompass/examples/ui/viewers/histogram/NewHistogramViewer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013, 2014 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  *   Alexandre Montplaisir - Initial API and implementation
  11  *   Bernd Hufmann - Updated to new TMF chart framework
  12  *******************************************************************************/
  13 package org.eclipse.tracecompass.examples.ui.viewers.histogram;
  14
  15 import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull;
  16
  17 import java.util.Arrays;
  18 import java.util.List;
  19
  20 import org.eclipse.swt.SWT;
  21 import org.eclipse.swt.widgets.Composite;
  22 import org.eclipse.swt.widgets.Display;
  23 import org.eclipse.tracecompass.tmf.core.statistics.ITmfStatistics;
  24 import org.eclipse.tracecompass.tmf.core.statistics.TmfStatisticsModule;
  25 import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
  26 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceManager;
  27 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  28 import org.eclipse.tracecompass.tmf.ui.viewers.xycharts.barcharts.TmfBarChartViewer;
  29 import org.swtchart.Chart;
  30 import org.swtchart.IAxis;
  31 import org.swtchart.ISeries;
  32 import org.swtchart.LineStyle;
  33
  34 /**
  35  * Histogram Viewer implementation based on TmfBarChartViewer.
  36  *
  37  * @author Alexandre Montplaisir
  38  * @author Bernd Hufmann
  39  */
  40 public class NewHistogramViewer extends TmfBarChartViewer {
  41
  42     /**
  43      * Creates a Histogram Viewer instance.
  44      * @param parent
  45      *            The parent composite to draw in.
  46      */
  47     public NewHistogramViewer(Composite parent) {
  48         super(parent, null, null, null, TmfBarChartViewer.MINIMUM_BAR_WIDTH);
  49
  50         Chart swtChart = getSwtChart();
  51
  52         IAxis xAxis = swtChart.getAxisSet().getXAxis(0);
  53         IAxis yAxis = swtChart.getAxisSet().getYAxis(0);
  54
  55         /* Hide the grid */
  56         xAxis.getGrid().setStyle(LineStyle.NONE);
  57         yAxis.getGrid().setStyle(LineStyle.NONE);
  58
  59         /* Hide the legend */
  60         swtChart.getLegend().setVisible(false);
  61
  62         addSeries("Number of events", Display.getDefault().getSystemColor(SWT.COLOR_BLUE).getRGB()); //$NON-NLS-1$
  63     }
  64
  65     @Override
  66     protected void readData(final ISeries series, final long start, final long end, final int nb) {
  67         if (getTrace() != null) {
  68             final double y[] = new double[nb];
  69
  70             Thread thread = new Thread("Histogram viewer update") { //$NON-NLS-1$
  71                 @Override
  72                 public void run() {
  73                     double x[] = getXAxis(start, end, nb);
  74                     final long yLong[] = new long[nb];
  75                     Arrays.fill(y, 0.0);
  76
  77                     /* Add the values for each trace */
  78                     for (ITmfTrace trace : TmfTraceManager.getTraceSet(getTrace())) {
  79                         trace = checkNotNull(trace);
  80                         /* Retrieve the statistics object */
  81                         final TmfStatisticsModule statsMod =
  82                                TmfTraceUtils.getAnalysisModuleOfClass(trace, TmfStatisticsModule.class, TmfStatisticsModule.ID);
  83                         if (statsMod == null) {
  84                             /* No statistics module available for this trace */
  85                             continue;
  86                         }
  87                         statsMod.waitForInitialization();
  88                         final ITmfStatistics stats = statsMod.getStatistics();
  89                         if (stats == null) {
  90                             /*
  91                              * Should not be null after waitForInitialization()
  92                              * is called.
  93                              */
  94                             throw new IllegalStateException();
  95                         }
  96                         List<Long> values = stats.histogramQuery(start, end, nb);
  97
  98                         for (int i = 0; i < nb; i++) {
  99                             yLong[i] += values.get(i);
 100                         }
 101                     }
 102
 103                     for (int i = 0; i < nb; i++) {
 104                         y[i] += yLong[i]; /* casting from long to double */
 105                     }
 106
 107                     /* Update the viewer */
 108                     drawChart(series, x, y);
 109                 }
 110             };
 111             thread.start();
 112         }
 113         return;
 114     }
 115 }