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

   1 /*******************************************************************************
   2  * Copyright (c) 2011 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  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.lttng.ui.views.histogram;
  14
  15 import org.eclipse.swt.SWT;
  16 import org.eclipse.swt.events.MouseEvent;
  17 import org.eclipse.swt.events.MouseMoveListener;
  18 import org.eclipse.swt.events.PaintEvent;
  19 import org.eclipse.swt.graphics.Color;
  20 import org.eclipse.swt.graphics.GC;
  21 import org.eclipse.swt.graphics.Image;
  22 import org.eclipse.swt.widgets.Composite;
  23 import org.eclipse.swt.widgets.Display;
  24
  25 /**
  26  * <b><u>FullTraceHistogram</u></b>
  27  * <p>
  28  * A histogram that displays the full trace.
  29  * <p>
  30  * It also features a selected range window that can be dragged and zoomed.
  31  */
  32 public class FullTraceHistogram extends Histogram implements MouseMoveListener {
  33
  34     // ------------------------------------------------------------------------
  35     // Constants
  36     // ------------------------------------------------------------------------
  37
  38     // Histogram colors
  39     private final Color fTimeRangeColor = new Color(Display.getCurrent(), 255, 128, 0);
  40
  41     // ------------------------------------------------------------------------
  42     // Attributes
  43     // ------------------------------------------------------------------------
  44
  45     private final HistogramZoom fZoom;
  46
  47     private long fRangeStartTime;
  48     private long fRangeDuration;
  49
  50     // ------------------------------------------------------------------------
  51     // Construction
  52     // ------------------------------------------------------------------------
  53
  54     public FullTraceHistogram(HistogramView view, Composite parent) {
  55         super(view, parent);
  56         fZoom = new HistogramZoom(this, fCanvas, getStartTime(), getTimeLimit());
  57         fCanvas.addMouseMoveListener(this);
  58     }
  59
  60     @Override
  61     public void dispose() {
  62         fTimeRangeColor.dispose();
  63         super.dispose();
  64     }
  65
  66     // ------------------------------------------------------------------------
  67     // Operations
  68     // ------------------------------------------------------------------------
  69
  70     public void setFullRange(long startTime, long endTime) {
  71         fZoom.setFullRange(startTime, endTime);
  72     }
  73
  74     public void setTimeRange(long startTime, long duration) {
  75         fRangeStartTime = startTime;
  76         fRangeDuration = duration;
  77         fZoom.setNewRange(fRangeStartTime, fRangeDuration);
  78         refresh();
  79     }
  80
  81     @Override
  82     public void updateTimeRange(long startTime, long endTime) {
  83         ((HistogramView) fParentView).updateTimeRange(startTime, endTime);
  84     }
  85
  86     // ------------------------------------------------------------------------
  87     // MouseListener
  88     // ------------------------------------------------------------------------
  89
  90     private boolean fMouseDown;
  91     private int fStartPosition;
  92
  93     @Override
  94     public void mouseDown(MouseEvent event) {
  95         // Check if we are outside the time range; if so, just set the current
  96         // event
  97         long timestamp = getTimestamp(event.x);
  98         if (timestamp < fZoom.getStartTime() || timestamp > fZoom.getEndTime()) {
  99             super.mouseDown(event);
 100             return;
 101         }
 102
 103         // Otherwise start moving the range window
 104         fMouseDown = true;
 105         fStartPosition = event.x;
 106     }
 107
 108     @Override
 109     public void mouseUp(MouseEvent event) {
 110         if (fMouseDown) {
 111             fMouseDown = false;
 112             ((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fZoom.getDuration());
 113         }
 114     }
 115
 116     // ------------------------------------------------------------------------
 117     // MouseMoveListener
 118     // ------------------------------------------------------------------------
 119
 120     @Override
 121     public void mouseMove(MouseEvent event) {
 122         if (fMouseDown) {
 123             int nbBuckets = event.x - fStartPosition;
 124             long delta = nbBuckets * fScaledData.fBucketDuration;
 125             long newStart = fZoom.getStartTime() + delta;
 126             if (newStart < getStartTime())
 127                 newStart = getStartTime();
 128             long newEnd = newStart + fZoom.getDuration();
 129             if (newEnd > getEndTime()) {
 130                 newEnd = getEndTime();
 131                 newStart = newEnd - fZoom.getDuration();
 132             }
 133             fRangeStartTime = newStart;
 134             refresh();
 135         }
 136     }
 137
 138     // ------------------------------------------------------------------------
 139     // PaintListener
 140     // ------------------------------------------------------------------------
 141
 142     @Override
 143     public void paintControl(PaintEvent event) {
 144         super.paintControl(event);
 145
 146         Image image = (Image) fCanvas.getData(IMAGE_KEY);
 147         assert image != null;
 148
 149         Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
 150         GC rangeWindowGC = new GC(rangeRectangleImage);
 151
 152         if (fScaledData != null && fRangeStartTime != 0) {
 153             drawTimeRangeWindow(rangeWindowGC, rangeRectangleImage);
 154         }
 155
 156         // Draws the buffer image onto the canvas.
 157         event.gc.drawImage(rangeRectangleImage, 0, 0);
 158
 159         rangeWindowGC.dispose();
 160         rangeRectangleImage.dispose();
 161     }
 162
 163     private void drawTimeRangeWindow(GC imageGC, Image image) {
 164
 165         // Map times to histogram coordinates
 166         long bucketSpan = fScaledData.fBucketDuration;
 167         int rangeWidth = (int) (fRangeDuration / bucketSpan);
 168
 169         int left = (int) ((fRangeStartTime - fDataModel.getStartTime()) / bucketSpan);
 170         int right = left + rangeWidth;
 171         int center = (left + right) / 2;
 172         int height = fCanvas.getSize().y - 2;
 173
 174         // Draw the selection window
 175         imageGC.setForeground(fTimeRangeColor);
 176         imageGC.setLineWidth(1);
 177         imageGC.setLineStyle(SWT.LINE_SOLID);
 178         imageGC.drawRoundRectangle(left, 0, rangeWidth, height - 1, 15, 15);
 179
 180         // Fill the selection window
 181         imageGC.setBackground(fTimeRangeColor);
 182         imageGC.setAlpha(35);
 183         imageGC.fillRoundRectangle(left + 1, 1, rangeWidth - 1, height - 2, 15, 15);
 184         imageGC.setAlpha(255);
 185
 186         // Draw the cross hair
 187         imageGC.setForeground(fTimeRangeColor);
 188         imageGC.setLineWidth(1);
 189         imageGC.setLineStyle(SWT.LINE_SOLID);
 190
 191         int chHalfWidth = ((rangeWidth < 60) ? rangeWidth * 2 / 3 : 40) / 2;
 192         imageGC.drawLine(center - chHalfWidth, height / 2, center + chHalfWidth, height / 2);
 193         imageGC.drawLine(center, height / 2 - chHalfWidth, center, height / 2 + chHalfWidth);
 194     }
 195
 196 }