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

   1 /*******************************************************************************
   2  * Copyright (c) 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  *   Francois Chouinard - Initial API and implementation
  11  *   Bernd Hufmann - Changed to updated histogram data model
  12  *******************************************************************************/
  13
  14 package org.eclipse.linuxtools.tmf.ui.views.histogram;
  15
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.events.MouseEvent;
  18 import org.eclipse.swt.events.MouseMoveListener;
  19 import org.eclipse.swt.events.PaintEvent;
  20 import org.eclipse.swt.graphics.Color;
  21 import org.eclipse.swt.graphics.GC;
  22 import org.eclipse.swt.graphics.Image;
  23 import org.eclipse.swt.widgets.Composite;
  24 import org.eclipse.swt.widgets.Display;
  25
  26 /**
  27  * A histogram widget that displays the event distribution of a whole trace.
  28  * <p>
  29  * It also features a selected range window that can be dragged and zoomed.
  30  *
  31  * @version 1.1
  32  * @author Francois Chouinard
  33  */
  34 public class FullTraceHistogram extends Histogram implements MouseMoveListener {
  35
  36     // ------------------------------------------------------------------------
  37     // Constants
  38     // ------------------------------------------------------------------------
  39
  40     // Histogram colors
  41     private final Color fTimeRangeColor = new Color(Display.getCurrent(), 255, 128, 0);
  42
  43     // ------------------------------------------------------------------------
  44     // Attributes
  45     // ------------------------------------------------------------------------
  46
  47     private final HistogramZoom fZoom;
  48
  49     private long fRangeStartTime = 0L;
  50     private long fRangeDuration;
  51
  52     // ------------------------------------------------------------------------
  53     // Construction
  54     // ------------------------------------------------------------------------
  55
  56     /**
  57      * Full Constructor
  58      *
  59      * @param view A reference to the parent histogram view
  60      * @param parent A reference to the parent composite
  61      */
  62     public FullTraceHistogram(HistogramView view, Composite parent) {
  63         super(view, parent);
  64         fZoom = new HistogramZoom(this, fCanvas, getStartTime(), getTimeLimit());
  65         fCanvas.addMouseMoveListener(this);
  66     }
  67
  68     @Override
  69     public void dispose() {
  70         fTimeRangeColor.dispose();
  71         super.dispose();
  72     }
  73
  74     // ------------------------------------------------------------------------
  75     // Operations
  76     // ------------------------------------------------------------------------
  77
  78     /* (non-Javadoc)
  79      * @see org.eclipse.linuxtools.tmf.ui.views.histogram.Histogram#clear()
  80      */
  81     @Override
  82     public void clear() {
  83         fRangeStartTime = 0L;
  84         fRangeDuration = 0L;
  85         if (fZoom != null) {
  86             fZoom.setFullRange(0L, 0L);
  87             fZoom.setNewRange(0L, 0L);
  88         }
  89         super.clear();
  90     }
  91
  92     /**
  93      * Sets the time range of the full histogram.
  94      *
  95      * @param startTime A start time
  96      * @param endTime A end time
  97      */
  98     public void setFullRange(long startTime, long endTime) {
  99         fZoom.setFullRange(startTime, endTime);
 100     }
 101
 102     /**
 103      * Sets the selected time range.
 104      *
 105      * @param startTime The histogram start time
 106      * @param duration The histogram duration
 107      */
 108     public void setTimeRange(long startTime, long duration) {
 109         fRangeStartTime = startTime;
 110         fRangeDuration = duration;
 111         fZoom.setNewRange(fRangeStartTime, fRangeDuration);
 112         fDataModel.complete();
 113     }
 114
 115     /* (non-Javadoc)
 116      * @see org.eclipse.linuxtools.tmf.ui.views.histogram.Histogram#updateTimeRange(long, long)
 117      */
 118     @Override
 119     public void updateTimeRange(long startTime, long endTime) {
 120         ((HistogramView) fParentView).updateTimeRange(startTime, endTime);
 121     }
 122
 123     // ------------------------------------------------------------------------
 124     // MouseListener
 125     // ------------------------------------------------------------------------
 126
 127     private boolean fMouseDown;
 128     private int fStartPosition;
 129
 130     @Override
 131     public void mouseDown(MouseEvent event) {
 132         fMouseDown = true;
 133         fStartPosition = event.x;
 134     }
 135
 136     @Override
 137     public void mouseUp(MouseEvent event) {
 138         if (fMouseDown) {
 139             fMouseDown = false;
 140             // Check if mouse click without move; if so, just set the current event time
 141             if (event.x == fStartPosition) {
 142                 super.mouseDown(event);
 143                 return;
 144             }
 145
 146             ((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fRangeDuration);
 147
 148         }
 149     }
 150
 151
 152     // ------------------------------------------------------------------------
 153     // MouseMoveListener
 154     // ------------------------------------------------------------------------
 155
 156     @Override
 157     public void mouseMove(MouseEvent event) {
 158
 159         if (fMouseDown) {
 160             int nbBuckets = event.x - fStartPosition;
 161             long delta = nbBuckets * fScaledData.fBucketDuration;
 162             long newStart = fZoom.getStartTime() + delta;
 163             if (newStart < getStartTime()) {
 164                 newStart = getStartTime();
 165             }
 166             long newEnd = newStart + fZoom.getDuration();
 167             if (newEnd > getEndTime()) {
 168                 newEnd = getEndTime();
 169                 newStart = newEnd - fZoom.getDuration();
 170             }
 171             fRangeStartTime = newStart;
 172             fDataModel.complete();
 173         }
 174     }
 175
 176     // ------------------------------------------------------------------------
 177     // PaintListener
 178     // ------------------------------------------------------------------------
 179
 180     @Override
 181     public void paintControl(PaintEvent event) {
 182         super.paintControl(event);
 183
 184         Image image = (Image) fCanvas.getData(IMAGE_KEY);
 185         assert image != null;
 186
 187         Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
 188         GC rangeWindowGC = new GC(rangeRectangleImage);
 189
 190         if ((fScaledData != null) && (fRangeStartTime != 0)) {
 191             drawTimeRangeWindow(rangeWindowGC);
 192         }
 193
 194         // Draws the buffer image onto the canvas.
 195         event.gc.drawImage(rangeRectangleImage, 0, 0);
 196
 197         rangeWindowGC.dispose();
 198         rangeRectangleImage.dispose();
 199     }
 200
 201     private void drawTimeRangeWindow(GC imageGC) {
 202
 203         // Map times to histogram coordinates
 204         long bucketSpan = Math.max(fScaledData.fBucketDuration, 1);
 205         int rangeWidth = (int) (fRangeDuration / bucketSpan);
 206
 207         int left = (int) ((fRangeStartTime - fDataModel.getFirstBucketTime()) / bucketSpan);
 208         int right = left + rangeWidth;
 209         int center = (left + right) / 2;
 210         int height = fCanvas.getSize().y;
 211
 212         // Draw the selection window
 213         imageGC.setForeground(fTimeRangeColor);
 214         imageGC.setLineWidth(1);
 215         imageGC.setLineStyle(SWT.LINE_SOLID);
 216         imageGC.drawRoundRectangle(left, 0, rangeWidth, height - 1, 15, 15);
 217
 218         // Fill the selection window
 219         imageGC.setBackground(fTimeRangeColor);
 220         imageGC.setAlpha(35);
 221         imageGC.fillRoundRectangle(left + 1, 1, rangeWidth - 1, height - 2, 15, 15);
 222         imageGC.setAlpha(255);
 223
 224         // Draw the cross hair
 225         imageGC.setForeground(fTimeRangeColor);
 226         imageGC.setLineWidth(1);
 227         imageGC.setLineStyle(SWT.LINE_SOLID);
 228
 229         int chHalfWidth = ((rangeWidth < 60) ? (rangeWidth * 2) / 3 : 40) / 2;
 230         imageGC.drawLine(center - chHalfWidth, height / 2, center + chHalfWidth, height / 2);
 231         imageGC.drawLine(center, (height / 2) - chHalfWidth, center, (height / 2) + chHalfWidth);
 232     }
 233
 234 }