author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:15:20 +0300 | |
branch | RCL_3 |
changeset 21 | b3cee849fa46 |
permissions | -rw-r--r-- |
21
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "graphdatacontainer.h" |
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#include "enginewrapper.h" |
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#include <QPainter> |
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#include <QFontMetrics> |
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const int amountOfMicroSecondsFitsScreen = 20 * 1000000; |
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const int microToSecondMultiplier = 1000000; |
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|
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GraphDataContainer::GraphDataContainer(const EngineWrapper& engine, QGraphicsItem *parent) : |
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DataContainer(engine, parent) |
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{ |
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HbFontSpec spec(HbFontSpec::Secondary); |
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mFont = spec.font(); |
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mFont.setPixelSize(12); |
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} |
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void GraphDataContainer::paint (QPainter *painter, |
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const QStyleOptionGraphicsItem *option, |
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QWidget *widget) |
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{ |
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Q_UNUSED(option); |
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Q_UNUSED(widget); |
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|
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// set proper font and prepare font metrics for text width / height calculation |
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painter->setFont(mFont); |
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QFontMetricsF metrics(mFont); |
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|
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// fill background with black color |
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painter->fillRect(rect(), Qt::black); |
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// calculate time factor |
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qreal scaleFactor = rect().width() / (qreal) amountOfMicroSecondsFitsScreen; |
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// calculate area height which is used to draw the grpahs |
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qreal drawAreaHeight = rect().height() - 2 * metrics.height(); |
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const QList<SampleEntry> sampleEntries = engine().sampleEntries(); |
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// check if sample array has been constructed |
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if (sampleEntries.length()) |
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{ |
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// draw vertical time lines first |
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int verticalBarPeriodInSecs = engine().settings().graphVerticalBarPeriod(); |
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if (verticalBarPeriodInSecs >= 1 && sampleEntries.first().sampleCount() > 0) |
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{ |
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// get time from the first sample |
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const SampleData& firstSample = sampleEntries.first().sample(0); |
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qint64 currentMicroSeconds = firstSample.mTimeFromStart; |
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// calculate amount of microseconds exceeding value by using the modulo operator |
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int remainderInMicroSeconds = currentMicroSeconds % (verticalBarPeriodInSecs * 1000000); |
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// calculate first x pos |
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qreal vbarXpos = rect().width() - (remainderInMicroSeconds * scaleFactor); |
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// calculate the amount in seconds |
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int barSeconds = (currentMicroSeconds - remainderInMicroSeconds) / microToSecondMultiplier; |
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// continue drawing periodically the vertical lines |
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while (vbarXpos >= 0 && barSeconds >= 0) |
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{ |
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// draw vertical line |
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painter->setPen(Qt::darkRed); |
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painter->drawLine(QPointF(vbarXpos, metrics.height() + 1), |
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QPointF(vbarXpos, rect().height() - metrics.height())); |
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// draw seconds value |
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painter->setPen(Qt::darkGray); |
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QString secsText = QString("%1s").arg(barSeconds); |
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QPointF secsPos(vbarXpos - metrics.width(secsText) / 2, |
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rect().height()); |
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painter->drawText(secsPos, secsText); |
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// calculate new position |
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vbarXpos -= verticalBarPeriodInSecs * 1000000 * scaleFactor; |
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barSeconds -= verticalBarPeriodInSecs; |
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} |
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} |
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// draw the basic grid |
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painter->setPen(Qt::darkGray); |
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|
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qreal axisY = metrics.height(); |
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104 |
painter->drawLine(QPointF(0, axisY), QPointF(rect().width(), axisY)); // upper line |
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|
105 |
painter->drawText(QPointF(0, axisY), tr("100%")); |
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|
106 |
|
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107 |
axisY = rect().height() / 2; |
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|
108 |
painter->drawLine(QPointF(0, axisY), QPointF(rect().width(), axisY)); // mid line |
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|
109 |
painter->drawText(QPointF(0, axisY), tr("50%")); |
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|
110 |
|
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111 |
axisY = rect().height() - metrics.height(); |
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112 |
painter->drawLine(QPointF(0, axisY), QPointF(rect().width(), axisY)); // bottom line |
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113 |
painter->drawText(QPointF(0, axisY), tr("0%")); |
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|
114 |
|
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115 |
int c = 0; |
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116 |
// draw graphs for each sampled type |
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117 |
for (int i=0; i<sampleEntries.length(); i++) |
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118 |
{ |
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119 |
// check if this setting has been enabled and it has some data |
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120 |
if (engine().settings().graphSources().isEnabled(i) && |
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121 |
sampleEntries.at(i).sampleCount() > 0) |
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122 |
{ |
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123 |
// set pen color for the graph |
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124 |
painter->setPen(sampleEntries.at(i).graphColor()); |
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|
125 |
|
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126 |
// remember the position where drawing started |
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127 |
qreal currentXPos(rect().width()); // start drawing from right |
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128 |
qreal currentYPos(0.); |
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|
129 |
|
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130 |
// draw samples |
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131 |
for (int j=0; j<sampleEntries.at(i).sampleCount()-1; j++) |
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132 |
{ |
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133 |
const SampleData& currentSample = sampleEntries.at(i).sample(j); |
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134 |
const SampleData& previousSample = sampleEntries.at(i).sample(j+1); |
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|
135 |
|
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136 |
// calculate X position for previous (j+1) |
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137 |
qreal previousXPos = currentXPos - |
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|
138 |
qAbs(previousSample.mTimeFromStart - currentSample.mTimeFromStart) * scaleFactor; |
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|
139 |
|
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|
140 |
|
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141 |
// calculate initial Y position |
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|
142 |
if (j==0) |
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|
143 |
{ |
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144 |
currentYPos = currentSample.mSize > 0 ? |
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|
145 |
drawAreaHeight * currentSample.mFree / currentSample.mSize + metrics.height() : |
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|
146 |
rect().height() - metrics.height(); |
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|
147 |
} |
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|
148 |
|
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149 |
// calculate Y position for previous (j+1) |
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150 |
qreal previousYPos = previousSample.mSize > 0 ? |
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|
151 |
drawAreaHeight * previousSample.mFree / previousSample.mSize + metrics.height() : |
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|
152 |
rect().height() - metrics.height(); |
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|
153 |
|
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|
154 |
|
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|
155 |
// draw a line between the previous and current |
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|
156 |
painter->drawLine(QPointF(previousXPos, previousYPos), |
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|
157 |
QPointF(currentXPos, currentYPos)); |
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|
158 |
|
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|
159 |
// draw current value in % |
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|
160 |
if (j==0) // draw the value of first sample |
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|
161 |
{ |
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|
162 |
qreal perc = currentSample.mSize > 0 ? |
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|
163 |
100. - 100. * currentSample.mFree / currentSample.mSize : 0; |
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|
164 |
QString percText = QString ("%1 %2%"). |
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|
165 |
arg(sampleEntries.at(i).description()). |
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Revision: 201033
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|
166 |
arg(perc, 0, 'f', 0); |
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diff
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|
167 |
|
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|
168 |
painter->drawText(QPointF(0, metrics.height() * (c + 2)), |
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Revision: 201033
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|
169 |
percText); |
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Revision: 201033
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|
170 |
c++; |
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|
171 |
} |
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diff
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|
172 |
|
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diff
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|
173 |
|
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|
174 |
// stop drawing if we have run out of space |
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Revision: 201033
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|
175 |
if (previousXPos < 0) |
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Revision: 201033
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|
176 |
break; |
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|
177 |
|
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Revision: 201033
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|
178 |
// remeber previous values |
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Revision: 201033
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|
179 |
currentXPos = previousXPos; |
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Revision: 201033
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|
180 |
currentYPos = previousYPos; |
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|
181 |
} |
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diff
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|
182 |
|
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|
183 |
|
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|
184 |
} |
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|
185 |
} |
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|
186 |
|
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|
187 |
} |
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Revision: 201033
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|
188 |
} |