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     /**
  79      * Sets the time range of the full histogram.
  80      *
  81      * @param startTime A start time
  82      * @param endTime A end time
  83      */
  84     public void setFullRange(long startTime, long endTime) {
  85         fZoom.setFullRange(startTime, endTime);
  86     }
  87
  88     /**
  89      * Sets the selected time range.
  90      *
  91      * @param startTime The histogram start time
  92      * @param duration The histogram duration
  93      */
  94     public void setTimeRange(long startTime, long duration) {
  95         fRangeStartTime = startTime;
  96         fRangeDuration = duration;
  97         fZoom.setNewRange(fRangeStartTime, fRangeDuration);
  98         fDataModel.complete();
  99     }
 100
 101     /* (non-Javadoc)
 102      * @see org.eclipse.linuxtools.tmf.ui.views.histogram.Histogram#updateTimeRange(long, long)
 103      */
 104     @Override
 105     public void updateTimeRange(long startTime, long endTime) {
 106         ((HistogramView) fParentView).updateTimeRange(startTime, endTime);
 107     }
 108
 109     // ------------------------------------------------------------------------
 110     // MouseListener
 111     // ------------------------------------------------------------------------
 112
 113     private boolean fMouseDown;
 114     private int fStartPosition;
 115
 116     @Override
 117     public void mouseDown(MouseEvent event) {
 118         fMouseDown = true;
 119         fStartPosition = event.x;
 120     }
 121
 122     @Override
 123     public void mouseUp(MouseEvent event) {
 124         if (fMouseDown) {
 125             fMouseDown = false;
 126             // Check if mouse click without move; if so, just set the current event time
 127             if (event.x == fStartPosition) {
 128                 super.mouseDown(event);
 129                 return;
 130             }
 131
 132             ((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fRangeDuration);
 133
 134         }
 135     }
 136
 137
 138     // ------------------------------------------------------------------------
 139     // MouseMoveListener
 140     // ------------------------------------------------------------------------
 141
 142     @Override
 143     public void mouseMove(MouseEvent event) {
 144
 145         if (fMouseDown) {
 146             int nbBuckets = event.x - fStartPosition;
 147             long delta = nbBuckets * fScaledData.fBucketDuration;
 148             long newStart = fZoom.getStartTime() + delta;
 149             if (newStart < getStartTime()) {
 150                 newStart = getStartTime();
 151             }
 152             long newEnd = newStart + fZoom.getDuration();
 153             if (newEnd > getEndTime()) {
 154                 newEnd = getEndTime();
 155                 newStart = newEnd - fZoom.getDuration();
 156             }
 157             fRangeStartTime = newStart;
 158             fDataModel.complete();
 159         }
 160     }
 161
 162     // ------------------------------------------------------------------------
 163     // PaintListener
 164     // ------------------------------------------------------------------------
 165
 166     @Override
 167     public void paintControl(PaintEvent event) {
 168         super.paintControl(event);
 169
 170         Image image = (Image) fCanvas.getData(IMAGE_KEY);
 171         assert image != null;
 172
 173         Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
 174         GC rangeWindowGC = new GC(rangeRectangleImage);
 175
 176         if ((fScaledData != null) && (fRangeStartTime != 0)) {
 177             drawTimeRangeWindow(rangeWindowGC);
 178         }
 179
 180         // Draws the buffer image onto the canvas.
 181         event.gc.drawImage(rangeRectangleImage, 0, 0);
 182
 183         rangeWindowGC.dispose();
 184         rangeRectangleImage.dispose();
 185     }
 186
 187     private void drawTimeRangeWindow(GC imageGC) {
 188
 189         // Map times to histogram coordinates
 190         long bucketSpan = Math.max(fScaledData.fBucketDuration, 1);
 191         int rangeWidth = (int) (fRangeDuration / bucketSpan);
 192
 193         int left = (int) ((fRangeStartTime - fDataModel.getFirstBucketTime()) / bucketSpan);
 194         int right = left + rangeWidth;
 195         int center = (left + right) / 2;
 196         int height = fCanvas.getSize().y;
 197
 198         // Draw the selection window
 199         imageGC.setForeground(fTimeRangeColor);
 200         imageGC.setLineWidth(1);
 201         imageGC.setLineStyle(SWT.LINE_SOLID);
 202         imageGC.drawRoundRectangle(left, 0, rangeWidth, height - 1, 15, 15);
 203
 204         // Fill the selection window
 205         imageGC.setBackground(fTimeRangeColor);
 206         imageGC.setAlpha(35);
 207         imageGC.fillRoundRectangle(left + 1, 1, rangeWidth - 1, height - 2, 15, 15);
 208         imageGC.setAlpha(255);
 209
 210         // Draw the cross hair
 211         imageGC.setForeground(fTimeRangeColor);
 212         imageGC.setLineWidth(1);
 213         imageGC.setLineStyle(SWT.LINE_SOLID);
 214
 215         int chHalfWidth = ((rangeWidth < 60) ? (rangeWidth * 2) / 3 : 40) / 2;
 216         imageGC.drawLine(center - chHalfWidth, height / 2, center + chHalfWidth, height / 2);
 217         imageGC.drawLine(center, (height / 2) - chHalfWidth, center, (height / 2) + chHalfWidth);
 218     }
 219
 220 }