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  *   Francois Chouinard - Initial API and implementation
  13  *******************************************************************************/
  14
  15 package org.eclipse.linuxtools.tmf.ui.views.histogram;
  16
  17 import org.eclipse.swt.SWT;
  18 import org.eclipse.swt.events.MouseEvent;
  19 import org.eclipse.swt.events.MouseMoveListener;
  20 import org.eclipse.swt.events.PaintEvent;
  21 import org.eclipse.swt.graphics.Color;
  22 import org.eclipse.swt.graphics.GC;
  23 import org.eclipse.swt.graphics.Image;
  24 import org.eclipse.swt.widgets.Composite;
  25 import org.eclipse.swt.widgets.Display;
  26
  27 /**
  28  * <b><u>FullTraceHistogram</u></b>
  29  * <p>
  30  * A histogram that displays the full trace.
  31  * <p>
  32  * It also features a selected range window that can be dragged and zoomed.
  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;
  50     private long fRangeDuration;
  51
  52     // ------------------------------------------------------------------------
  53     // Construction
  54     // ------------------------------------------------------------------------
  55
  56     public FullTraceHistogram(HistogramView view, Composite parent) {
  57         super(view, parent);
  58         fZoom = new HistogramZoom(this, fCanvas, getStartTime(), getTimeLimit());
  59         fCanvas.addMouseMoveListener(this);
  60     }
  61
  62     @Override
  63     public void dispose() {
  64         fTimeRangeColor.dispose();
  65         super.dispose();
  66     }
  67
  68     // ------------------------------------------------------------------------
  69     // Operations
  70     // ------------------------------------------------------------------------
  71
  72     public void setFullRange(long startTime, long endTime) {
  73         fZoom.setFullRange(startTime, endTime);
  74     }
  75
  76     public void setTimeRange(long startTime, long duration) {
  77         fRangeStartTime = startTime;
  78         fRangeDuration = duration;
  79         fZoom.setNewRange(fRangeStartTime, fRangeDuration);
  80         fDataModel.complete();
  81     }
  82
  83     @Override
  84     public void updateTimeRange(long startTime, long endTime) {
  85         ((HistogramView) fParentView).updateTimeRange(startTime, endTime);
  86     }
  87
  88     // ------------------------------------------------------------------------
  89     // MouseListener
  90     // ------------------------------------------------------------------------
  91
  92     private boolean fMouseDown;
  93     private int fStartPosition;
  94
  95     @Override
  96     public void mouseDown(MouseEvent event) {
  97         // Check if we are outside the time range; if so, just set the current
  98         // event
  99         long timestamp = getTimestamp(event.x);
 100         if (timestamp < fZoom.getStartTime() || timestamp > fZoom.getEndTime()) {
 101             super.mouseDown(event);
 102             return;
 103         }
 104
 105         // Otherwise start moving the range window
 106         fMouseDown = true;
 107         fStartPosition = event.x;
 108     }
 109
 110     @Override
 111     public void mouseUp(MouseEvent event) {
 112         if (fMouseDown) {
 113             fMouseDown = false;
 114             ((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fZoom.getDuration());
 115         }
 116     }
 117
 118     // ------------------------------------------------------------------------
 119     // MouseMoveListener
 120     // ------------------------------------------------------------------------
 121
 122     @Override
 123     public void mouseMove(MouseEvent event) {
 124         if (fMouseDown) {
 125             int nbBuckets = event.x - fStartPosition;
 126             long delta = nbBuckets * fScaledData.fBucketDuration;
 127             long newStart = fZoom.getStartTime() + delta;
 128             if (newStart < getStartTime())
 129                 newStart = getStartTime();
 130             long newEnd = newStart + fZoom.getDuration();
 131             if (newEnd > getEndTime()) {
 132                 newEnd = getEndTime();
 133                 newStart = newEnd - fZoom.getDuration();
 134             }
 135             fRangeStartTime = newStart;
 136             fDataModel.complete();
 137         }
 138     }
 139
 140     // ------------------------------------------------------------------------
 141     // PaintListener
 142     // ------------------------------------------------------------------------
 143
 144     @Override
 145     public void paintControl(PaintEvent event) {
 146         super.paintControl(event);
 147
 148         Image image = (Image) fCanvas.getData(IMAGE_KEY);
 149         assert image != null;
 150
 151         Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
 152         GC rangeWindowGC = new GC(rangeRectangleImage);
 153
 154         if (fScaledData != null && fRangeStartTime != 0) {
 155             drawTimeRangeWindow(rangeWindowGC, rangeRectangleImage);
 156         }
 157
 158         // Draws the buffer image onto the canvas.
 159         event.gc.drawImage(rangeRectangleImage, 0, 0);
 160
 161         rangeWindowGC.dispose();
 162         rangeRectangleImage.dispose();
 163     }
 164
 165     private void drawTimeRangeWindow(GC imageGC, Image image) {
 166
 167         // Map times to histogram coordinates
 168         long bucketSpan = fScaledData.fBucketDuration;
 169         int rangeWidth = (int) (fRangeDuration / bucketSpan);
 170
 171         int left = (int) ((fRangeStartTime - fDataModel.getFirstBucketTime()) / bucketSpan);
 172         int right = left + rangeWidth;
 173         int center = (left + right) / 2;
 174         int height = fCanvas.getSize().y - 2;
 175
 176         // Draw the selection window
 177         imageGC.setForeground(fTimeRangeColor);
 178         imageGC.setLineWidth(1);
 179         imageGC.setLineStyle(SWT.LINE_SOLID);
 180         imageGC.drawRoundRectangle(left, 0, rangeWidth, height - 1, 15, 15);
 181
 182         // Fill the selection window
 183         imageGC.setBackground(fTimeRangeColor);
 184         imageGC.setAlpha(35);
 185         imageGC.fillRoundRectangle(left + 1, 1, rangeWidth - 1, height - 2, 15, 15);
 186         imageGC.setAlpha(255);
 187
 188         // Draw the cross hair
 189         imageGC.setForeground(fTimeRangeColor);
 190         imageGC.setLineWidth(1);
 191         imageGC.setLineStyle(SWT.LINE_SOLID);
 192
 193         int chHalfWidth = ((rangeWidth < 60) ? rangeWidth * 2 / 3 : 40) / 2;
 194         imageGC.drawLine(center - chHalfWidth, height / 2, center + chHalfWidth, height / 2);
 195         imageGC.drawLine(center, height / 2 - chHalfWidth, center, height / 2 + chHalfWidth);
 196     }
 197
 198 }