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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 setTimeRange(long startTime, long duration) { | |
71 | fRangeStartTime = startTime; | |
72 | fRangeDuration = duration; | |
73 | fZoom.setFullRange(getStartTime(), getEndTime()); | |
74 | fZoom.setNewRange(fRangeStartTime, fRangeDuration); | |
75 | refresh(); | |
76 | } | |
77 | ||
78 | @Override | |
79 | public void updateTimeRange(long startTime, long endTime) { | |
80 | ((HistogramView) fParentView).updateTimeRange(startTime, endTime); | |
81 | } | |
82 | ||
83 | // ------------------------------------------------------------------------ | |
84 | // MouseListener | |
85 | // ------------------------------------------------------------------------ | |
86 | ||
87 | private boolean fMouseDown; | |
88 | private int fStartPosition; | |
89 | ||
90 | @Override | |
91 | public void mouseDown(MouseEvent event) { | |
92 | // Check if we are outside the time range; if so, just set the current | |
93 | // event | |
94 | long timestamp = getTimestamp(event.x); | |
95 | if (timestamp < fZoom.getStartTime() || timestamp > fZoom.getEndTime()) { | |
96 | super.mouseDown(event); | |
97 | return; | |
98 | } | |
99 | ||
100 | // Otherwise start moving the range window | |
101 | fMouseDown = true; | |
102 | fStartPosition = event.x; | |
103 | } | |
104 | ||
105 | @Override | |
106 | public void mouseUp(MouseEvent event) { | |
107 | if (fMouseDown) { | |
108 | fMouseDown = false; | |
109 | ((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fZoom.getDuration()); | |
110 | } | |
111 | } | |
112 | ||
113 | // ------------------------------------------------------------------------ | |
114 | // MouseMoveListener | |
115 | // ------------------------------------------------------------------------ | |
116 | ||
117 | @Override | |
118 | public void mouseMove(MouseEvent event) { | |
119 | if (fMouseDown) { | |
120 | int nbBuckets = event.x - fStartPosition; | |
121 | long delta = nbBuckets * fScaledData.fBucketDuration; | |
122 | long newStart = fZoom.getStartTime() + delta; | |
123 | if (newStart < getStartTime()) | |
124 | newStart = getStartTime(); | |
125 | long newEnd = newStart + fZoom.getDuration(); | |
126 | if (newEnd > getEndTime()) { | |
127 | newEnd = getEndTime(); | |
128 | newStart = newEnd - fZoom.getDuration(); | |
129 | } | |
130 | fRangeStartTime = newStart; | |
131 | refresh(); | |
132 | } | |
133 | } | |
134 | ||
135 | // ------------------------------------------------------------------------ | |
136 | // PaintListener | |
137 | // ------------------------------------------------------------------------ | |
138 | ||
139 | @Override | |
140 | public void paintControl(PaintEvent event) { | |
141 | super.paintControl(event); | |
142 | ||
143 | Image image = (Image) fCanvas.getData(IMAGE_KEY); | |
144 | assert image != null; | |
145 | ||
146 | Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY); | |
147 | GC rangeWindowGC = new GC(rangeRectangleImage); | |
148 | ||
149 | if (fRangeStartTime != 0) { | |
150 | drawTimeRangeWindow(rangeWindowGC, rangeRectangleImage); | |
151 | } | |
152 | ||
153 | // Draws the buffer image onto the canvas. | |
154 | event.gc.drawImage(rangeRectangleImage, 0, 0); | |
155 | ||
156 | rangeWindowGC.dispose(); | |
157 | rangeRectangleImage.dispose(); | |
158 | } | |
159 | ||
160 | private void drawTimeRangeWindow(GC imageGC, Image image) { | |
161 | ||
162 | // Map times to histogram coordinates | |
163 | long bucketSpan = fScaledData.fBucketDuration; | |
164 | int rangeWidth = (int) (fRangeDuration / bucketSpan); | |
165 | ||
166 | int left = (int) ((fRangeStartTime - fDataModel.getStartTime()) / bucketSpan); | |
167 | int right = left + rangeWidth; | |
168 | int center = (left + right) / 2; | |
169 | int height = fCanvas.getSize().y - 2; | |
170 | ||
171 | // Draw the selection window | |
172 | imageGC.setForeground(fTimeRangeColor); | |
173 | imageGC.setLineWidth(1); | |
174 | imageGC.setLineStyle(SWT.LINE_SOLID); | |
175 | imageGC.drawRoundRectangle(left, 0, rangeWidth, height - 1, 15, 15); | |
176 | ||
177 | // Fill the selection window | |
178 | imageGC.setBackground(fTimeRangeColor); | |
179 | imageGC.setAlpha(35); | |
180 | imageGC.fillRoundRectangle(left + 1, 1, rangeWidth - 1, height - 2, 15, 15); | |
181 | imageGC.setAlpha(255); | |
182 | ||
183 | // Draw the cross hair | |
184 | imageGC.setForeground(fTimeRangeColor); | |
185 | imageGC.setLineWidth(1); | |
186 | imageGC.setLineStyle(SWT.LINE_SOLID); | |
187 | ||
188 | int chHalfWidth = ((rangeWidth < 60) ? rangeWidth * 2 / 3 : 40) / 2; | |
189 | imageGC.drawLine(center - chHalfWidth, height / 2, center + chHalfWidth, height / 2); | |
190 | imageGC.drawLine(center, height / 2 - chHalfWidth, center, height / 2 + chHalfWidth); | |
191 | } | |
192 | ||
193 | } |