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annotate src/pngplayer.cpp @ 5:107e435cb569

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Enable speed slider in pngplayer
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 25 Mar 2015 14:24:38 +0100
parents 248d5d1cdb38
children c11fe56aa4a2
rev   line source
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1 /* Copyright (C) 2014 by Intevation GmbH
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2 *
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3 * This file is Free Software under the GNU GPL (v>=2)
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4 * and comes with ABSOLUTELY NO WARRANTY!
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5 * See LICENSE.txt for details.
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6 */
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7 #include "pngplayer.h"
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8 #include "constants.h"
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9 #include "imagelabel.h"
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10 #include <QVBoxLayout>
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11 #include <QPixmap>
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12 #include <QLabel>
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13 #include <QPushButton>
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14 #include <QHBoxLayout>
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15 #include <QSlider>
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16 #include <QSettings>
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17
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18 #include <QDebug>
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19
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20 PNGPlayer::PNGPlayer(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f) {
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21 setupGUI();
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22 QSettings settings;
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23 mSpeedSlider->setValue(settings.value(REPLAY_SPEED_KEY, REPLAY_SPEED_DEFAULT).toInt());
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24 speedChanged();
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25 }
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26
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27 void PNGPlayer::setupGUI() {
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28 QVBoxLayout *baseLayout = new QVBoxLayout;
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29 mPNGLabel = new ImageLabel;
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30 mPNGLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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31
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32 QHBoxLayout *controlArea = new QHBoxLayout;
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33 QHBoxLayout *controlBtns = new QHBoxLayout;
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34 controlArea->addLayout(controlBtns);
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35
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36 QPushButton *firstBtn = new QPushButton("First");
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37 controlBtns->addWidget(firstBtn);
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38 connect(firstBtn, &QPushButton::clicked, this, &PNGPlayer::firstClicked);
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39
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40 QPushButton *prevBtn = new QPushButton("Prev");
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41 controlBtns->addWidget(prevBtn);
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42 connect(prevBtn, &QPushButton::clicked, this, &PNGPlayer::back);
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43
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44 mPlayBtn = new QPushButton("Play");
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45 mPlayBtn->setCheckable(true);
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46 controlBtns->addWidget(mPlayBtn);
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47 connect(mPlayBtn, &QPushButton::clicked, this, &PNGPlayer::togglePlay);
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48
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49 QPushButton *nextBtn = new QPushButton("Next");
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50 connect(nextBtn, &QPushButton::clicked, this, &PNGPlayer::advance);
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51 controlBtns->addWidget(nextBtn);
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52
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53 QPushButton *lastBtn = new QPushButton("Last");
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54 controlBtns->addWidget(lastBtn);
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55 connect(lastBtn, &QPushButton::clicked, this, &PNGPlayer::lastClicked);
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56
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57 mSlider = new QSlider(Qt::Horizontal);
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58 mSlider->setTickPosition(QSlider::TicksBelow);
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59 connect(mSlider, &QSlider::valueChanged, this, &PNGPlayer::sliderChanged);
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60 connect(mSlider, &QSlider::sliderPressed, this, &PNGPlayer::sliderPressed);
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61 connect(mSlider, &QSlider::sliderReleased, this, &PNGPlayer::sliderReleased);
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62
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63 QVBoxLayout *speedInfoArea = new QVBoxLayout;
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64 QHBoxLayout *speedArea = new QHBoxLayout;
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65 speedInfoArea->addLayout(speedArea);
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66
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67 QLabel *speedLabel = new QLabel(tr("Speed:"));
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68 speedArea->addWidget(speedLabel);
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69
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70 mSpeedSlider = new QSlider(Qt::Horizontal);
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71 mSpeedSlider->setMaximum(10);
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72 mSpeedSlider->setTickInterval(1);
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73 mSpeedSlider->setTickPosition(QSlider::TicksBelow);
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74 mSpeedSlider->setTracking(false);
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75 mSpeedSlider->setInvertedAppearance(true);
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76
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77 speedArea->addWidget(mSpeedSlider);
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78 connect(mSpeedSlider, &QSlider::valueChanged, this, &PNGPlayer::speedChanged);
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79
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80 mCurSpeedLabel = new QLabel;
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81 speedArea->addWidget(mCurSpeedLabel);
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82 speedArea->addStretch(-1);
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83
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84 mPositionLabel = new QLabel;
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85 speedInfoArea->addWidget(mPositionLabel);
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86
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87 controlArea->addLayout(speedInfoArea);
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88
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89 baseLayout->addWidget(mPNGLabel);
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90 baseLayout->addLayout(controlArea);
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91 baseLayout->addWidget(mSlider);
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92
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93 connect(&mAdvanceTimer, SIGNAL(timeout()), this, SIGNAL(advance()));
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94 setLayout(baseLayout);
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95 }
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96
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97 void PNGPlayer::showPicture(const QString& fileName, int current, int max,
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98 const QDateTime& timestamp) {
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99 QPixmap pic(mBaseDir.filePath(fileName));
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100 /* If this is too slow we could use a pixmap cache here and do
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101 * some intelligent preloading */
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102 if (pic.isNull()) {
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103 emit error(tr("Failed to load picture: '%1'").arg(fileName));
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104 return;
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105 }
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106 mPNGLabel->setPixmap(pic);
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107 updatePositions(current, max, timestamp);
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108 }
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109
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110 void PNGPlayer::updatePositions(int current, int max, const QDateTime& timestamp) {
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111 mMax = max;
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112 mSlider->blockSignals(true); /* We only want user generated changes */
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113 mSlider->setValue(current);
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114 mSlider->blockSignals(false);
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115 mSlider->setMaximum(max);
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116 mPositionLabel->setText("<b>" + tr("Screenshot Nr.:") + " </b>" +
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117 QString("%1 (%2)").arg(current).arg(max) + " / <b>" +
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118 tr("Timestamp:") + " </b>" + timestamp.toString(LONG_DATE_FORMAT));
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119
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120 if (mMax == current && mAdvanceTimer.isActive()) {
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121 togglePlay();
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122 }
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123 }
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124
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125 void PNGPlayer::setSpeed(int mSecsPerPicture) {
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126 if (mSecsPerPicture == 1000) {
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127 mCurSpeedLabel->setText(tr("%1 second per Picture").
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128 arg(mSecsPerPicture / 1000.));
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129 } else {
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130 mCurSpeedLabel->setText(tr("%1 seconds per Picture").
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131 arg(mSecsPerPicture / 1000.));
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132 }
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133 mAdvanceTimer.setInterval(mSecsPerPicture);
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134 }
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135
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136 void PNGPlayer::togglePlay() {
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137 if (mAdvanceTimer.isActive()) {
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138 mAdvanceTimer.stop();
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139 mPlayBtn->setText("Play");
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140 mPlayBtn->setChecked(false);
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141 } else {
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142 mAdvanceTimer.start();
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143 mPlayBtn->setText("Pause");
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144 mPlayBtn->setChecked(true);
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145 emit advance();
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146 }
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147 }
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148
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149 void PNGPlayer::sliderChanged() {
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150 qDebug() << "Slider moved. ";
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151 emit jumpToFrame(mSlider->value());
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152 }
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153
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154 void PNGPlayer::sliderPressed() {
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155 qDebug() << "Slider pressed. Deactivating timer. ";
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156 mAdvanceTimer.stop();
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157 }
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158
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159 void PNGPlayer::sliderReleased() {
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160 if (mPlayBtn->isChecked()) {
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161 mAdvanceTimer.start();
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162 }
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163 }
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164
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165 void PNGPlayer::firstClicked() {
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166 emit jumpToFrame(0);
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167 }
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168
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169 void PNGPlayer::lastClicked() {
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170 emit jumpToFrame(mMax);
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171 }
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172
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173 void PNGPlayer::speedChanged() {
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174 if (mSpeedSlider->value()) {
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175 setSpeed(mSpeedSlider->value() * REPLAY_SPEED_STEP_MS);
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176 } else {
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177 setSpeed(REPLAY_SPEED_STEP_MS / 2);
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178 }
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179 QSettings settings;
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180 settings.setValue(REPLAY_SPEED_KEY, mSpeedSlider->value());
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181 }
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