org.eclipse.linuxtools.tracing.examples/src/org/eclipse/linuxtools/tracing/examples/ui/viewers/histogram/NewHistogramViewer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013 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.linuxtools.tracing.examples.ui.viewers.histogram;
  14
  15 import java.util.Arrays;
  16 import java.util.List;
  17
  18 import org.eclipse.linuxtools.tmf.core.statistics.ITmfStatistics;
  19 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  20 import org.eclipse.linuxtools.tmf.core.trace.TmfTraceManager;
  21 import org.eclipse.linuxtools.tmf.ui.viewers.xycharts.barcharts.TmfBarChartViewer;
  22 import org.eclipse.linuxtools.tmf.ui.views.statistics.TmfStatisticsModule;
  23 import org.eclipse.swt.SWT;
  24 import org.eclipse.swt.widgets.Composite;
  25 import org.eclipse.swt.widgets.Display;
  26 import org.swtchart.Chart;
  27 import org.swtchart.IAxis;
  28 import org.swtchart.ISeries;
  29 import org.swtchart.LineStyle;
  30
  31 /**
  32  * Histogram Viewer implementation based on TmfBarChartViewer.
  33  *
  34  * @author Alexandre Montplaisir
  35  * @author Bernd Hufmann
  36  */
  37 @SuppressWarnings("restriction")
  38 public class NewHistogramViewer extends TmfBarChartViewer {
  39
  40     /**
  41      * Creates a Histogram Viewer instance.
  42      * @param parent
  43      *            The parent composite to draw in.
  44      */
  45     public NewHistogramViewer(Composite parent) {
  46         super(parent, null, null, null, TmfBarChartViewer.MINIMUM_BAR_WIDTH);
  47
  48         Chart swtChart = getSwtChart();
  49
  50         IAxis xAxis = swtChart.getAxisSet().getXAxis(0);
  51         IAxis yAxis = swtChart.getAxisSet().getYAxis(0);
  52
  53         /* Hide the grid */
  54         xAxis.getGrid().setStyle(LineStyle.NONE);
  55         yAxis.getGrid().setStyle(LineStyle.NONE);
  56
  57         /* Hide the legend */
  58         swtChart.getLegend().setVisible(false);
  59
  60         addSeries("Number of events", Display.getDefault().getSystemColor(SWT.COLOR_BLUE).getRGB()); //$NON-NLS-1$
  61     }
  62
  63     @Override
  64     protected void readData(final ISeries series, final long start, final long end, final int nb) {
  65         if (getTrace() != null) {
  66             final double y[] = new double[nb];
  67
  68             Thread thread = new Thread("Histogram viewer update") { //$NON-NLS-1$
  69                 @Override
  70                 public void run() {
  71                     double x[] = getXAxis(start, end, nb);
  72                     final long yLong[] = new long[nb];
  73                     Arrays.fill(y, 0.0);
  74
  75                     /* Add the values for each trace */
  76                     for (ITmfTrace trace : TmfTraceManager.getTraceSet(getTrace())) {
  77                         /* Retrieve the statistics object */
  78                         final TmfStatisticsModule statsMod =
  79                                trace.getAnalysisModuleOfClass(TmfStatisticsModule.class, TmfStatisticsModule.ID);
  80                         if (statsMod == null) {
  81                             /* No statistics module available for this trace */
  82                             continue;
  83                         }
  84                         final ITmfStatistics stats = statsMod.getStatistics();
  85                         List<Long> values = stats.histogramQuery(start, end, nb);
  86
  87                         for (int i = 0; i < nb; i++) {
  88                             yLong[i] += values.get(i);
  89                         }
  90                     }
  91
  92                     for (int i = 0; i < nb; i++) {
  93                         y[i] += yLong[i]; /* casting from long to double */
  94                     }
  95
  96                     /* Update the viewer */
  97                     drawChart(series, x, y);
  98                 }
  99             };
 100             thread.start();
 101         }
 102         return;
 103     }
 104 }