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 that displays the full trace.
  28  * <p>
  29  * It also features a selected range window that can be dragged and zoomed.
  30  *
  31  * @version 1.0
  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;
  50     private long fRangeDuration;
  51
  52     // ------------------------------------------------------------------------
  53     // Construction
  54     // ------------------------------------------------------------------------
  55
  56     /**
  57      * Standard 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 A start time
  92      * @param duration A window 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     @Override
 102     public void updateTimeRange(long startTime, long endTime) {
 103         ((HistogramView) fParentView).updateTimeRange(startTime, endTime);
 104     }
 105
 106     // ------------------------------------------------------------------------
 107     // MouseListener
 108     // ------------------------------------------------------------------------
 109
 110     private boolean fMouseDown;
 111     private int fStartPosition;
 112
 113     @Override
 114     public void mouseDown(MouseEvent event) {
 115         fMouseDown = true;
 116         fStartPosition = event.x;
 117     }
 118
 119     @Override
 120     public void mouseUp(MouseEvent event) {
 121         if (fMouseDown) {
 122             fMouseDown = false;
 123             // Check if mouse click without move; if so, just set the current event time
 124             if (event.x == fStartPosition) {
 125                 super.mouseDown(event);
 126                 return;
 127             }
 128
 129             ((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fZoom.getDuration());
 130
 131         }
 132     }
 133
 134
 135     // ------------------------------------------------------------------------
 136     // MouseMoveListener
 137     // ------------------------------------------------------------------------
 138
 139     @Override
 140     public void mouseMove(MouseEvent event) {
 141
 142         if (fMouseDown) {
 143             int nbBuckets = event.x - fStartPosition;
 144             long delta = nbBuckets * fScaledData.fBucketDuration;
 145             long newStart = fZoom.getStartTime() + delta;
 146             if (newStart < getStartTime()) {
 147                 newStart = getStartTime();
 148             }
 149             long newEnd = newStart + fZoom.getDuration();
 150             if (newEnd > getEndTime()) {
 151                 newEnd = getEndTime();
 152                 newStart = newEnd - fZoom.getDuration();
 153             }
 154             fRangeStartTime = newStart;
 155             fDataModel.complete();
 156         }
 157     }
 158
 159     // ------------------------------------------------------------------------
 160     // PaintListener
 161     // ------------------------------------------------------------------------
 162
 163     @Override
 164     public void paintControl(PaintEvent event) {
 165         super.paintControl(event);
 166
 167         Image image = (Image) fCanvas.getData(IMAGE_KEY);
 168         assert image != null;
 169
 170         Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
 171         GC rangeWindowGC = new GC(rangeRectangleImage);
 172
 173         if ((fScaledData != null) && (fRangeStartTime != 0)) {
 174             drawTimeRangeWindow(rangeWindowGC, rangeRectangleImage);
 175         }
 176
 177         // Draws the buffer image onto the canvas.
 178         event.gc.drawImage(rangeRectangleImage, 0, 0);
 179
 180         rangeWindowGC.dispose();
 181         rangeRectangleImage.dispose();
 182     }
 183
 184     private void drawTimeRangeWindow(GC imageGC, Image image) {
 185
 186         // Map times to histogram coordinates
 187         long bucketSpan = Math.max(fScaledData.fBucketDuration,1);
 188         int rangeWidth = (int) (fRangeDuration / bucketSpan);
 189
 190         int left = (int) ((fRangeStartTime - fDataModel.getFirstBucketTime()) / bucketSpan);
 191         int right = left + rangeWidth;
 192         int center = (left + right) / 2;
 193         int height = fCanvas.getSize().y - 2;
 194
 195         // Draw the selection window
 196         imageGC.setForeground(fTimeRangeColor);
 197         imageGC.setLineWidth(1);
 198         imageGC.setLineStyle(SWT.LINE_SOLID);
 199         imageGC.drawRoundRectangle(left, 0, rangeWidth, height - 1, 15, 15);
 200
 201         // Fill the selection window
 202         imageGC.setBackground(fTimeRangeColor);
 203         imageGC.setAlpha(35);
 204         imageGC.fillRoundRectangle(left + 1, 1, rangeWidth - 1, height - 2, 15, 15);
 205         imageGC.setAlpha(255);
 206
 207         // Draw the cross hair
 208         imageGC.setForeground(fTimeRangeColor);
 209         imageGC.setLineWidth(1);
 210         imageGC.setLineStyle(SWT.LINE_SOLID);
 211
 212         int chHalfWidth = ((rangeWidth < 60) ? (rangeWidth * 2) / 3 : 40) / 2;
 213         imageGC.drawLine(center - chHalfWidth, height / 2, center + chHalfWidth, height / 2);
 214         imageGC.drawLine(center, (height / 2) - chHalfWidth, center, (height / 2) + chHalfWidth);
 215     }
 216
 217 }