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annotate src/pngplayer.cpp @ 32:179239c94740

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(issue7-8) Add shortcuts for play/pause and next
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 06 May 2015 15:31:54 +0200
parents 64a51a42c01f
children 40a683d1a318
rev   line source
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1 /* Copyright (C) 2015 by ETH Zürich
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #include "pngplayer.h"
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9 #include "constants.h"
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10 #include "imagelabel.h"
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11 #include <QVBoxLayout>
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12 #include <QPixmap>
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13 #include <QLabel>
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14 #include <QPushButton>
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15 #include <QHBoxLayout>
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16 #include <QSlider>
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17 #include <QSettings>
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18 #include <QApplication>
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19 #include <QStyle>
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20
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21 #include <QDebug>
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22
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23 PNGPlayer::PNGPlayer(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f) {
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24 setupGUI();
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25 QSettings settings;
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26 mSpeedSlider->setValue(settings.value(REPLAY_SPEED_KEY, REPLAY_SPEED_DEFAULT).toInt());
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27 speedChanged();
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28 }
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29
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30 void PNGPlayer::setupGUI() {
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31 QVBoxLayout *baseLayout = new QVBoxLayout;
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32 mPNGLabel = new ImageLabel;
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33 mPNGLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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34
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35 QHBoxLayout *controlArea = new QHBoxLayout;
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36 QHBoxLayout *controlBtns = new QHBoxLayout;
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37 controlArea->addLayout(controlBtns);
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38 controlArea->addStretch(-1);
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39
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40 QPushButton *firstBtn = new QPushButton;
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41 firstBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSkipBackward));
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42 controlBtns->addWidget(firstBtn);
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43 connect(firstBtn, &QPushButton::clicked, this, &PNGPlayer::firstClicked);
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44
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45 QPushButton *prevBtn = new QPushButton;
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46 prevBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSeekBackward));
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47 controlBtns->addWidget(prevBtn);
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48 connect(prevBtn, &QPushButton::clicked, this, &PNGPlayer::back);
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49
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50 mPlayBtn = new QPushButton;
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51 mPlayBtn->setCheckable(true);
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52 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPlay));
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53 controlBtns->addWidget(mPlayBtn);
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54 connect(mPlayBtn, &QPushButton::clicked, this, &PNGPlayer::togglePlay);
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55
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56 QPushButton *nextBtn = new QPushButton;
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57 nextBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSeekForward));
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58 connect(nextBtn, &QPushButton::clicked, this, &PNGPlayer::advance);
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59 controlBtns->addWidget(nextBtn);
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60
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61 QPushButton *lastBtn = new QPushButton;
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62 lastBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSkipForward));
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63 controlBtns->addWidget(lastBtn);
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64 connect(lastBtn, &QPushButton::clicked, this, &PNGPlayer::lastClicked);
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65
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66 mSlider = new QSlider(Qt::Horizontal);
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67 mSlider->setTickPosition(QSlider::TicksBelow);
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68 connect(mSlider, &QSlider::valueChanged, this, &PNGPlayer::sliderChanged);
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69 connect(mSlider, &QSlider::sliderPressed, this, &PNGPlayer::sliderPressed);
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70 connect(mSlider, &QSlider::sliderReleased, this, &PNGPlayer::sliderReleased);
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71
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72 QVBoxLayout *speedInfoArea = new QVBoxLayout;
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73 QHBoxLayout *speedArea = new QHBoxLayout;
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74 speedInfoArea->addLayout(speedArea);
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75
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76 QLabel *speedLabel = new QLabel(tr("Speed:"));
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77 speedArea->addWidget(speedLabel);
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78
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79 mSpeedSlider = new QSlider(Qt::Horizontal);
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80 mSpeedSlider->setMaximum(10);
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81 mSpeedSlider->setTickInterval(1);
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82 mSpeedSlider->setTickPosition(QSlider::TicksBelow);
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83 mSpeedSlider->setTracking(false);
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84 mSpeedSlider->setInvertedAppearance(true);
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85
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86 speedArea->addWidget(mSpeedSlider);
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87 connect(mSpeedSlider, &QSlider::valueChanged, this, &PNGPlayer::speedChanged);
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88
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89 mCurSpeedLabel = new QLabel;
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90 speedArea->addWidget(mCurSpeedLabel);
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91 speedArea->addStretch(-1);
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92
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93 mPositionLabel = new QLabel;
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94 speedInfoArea->addWidget(mPositionLabel);
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95
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96 controlArea->addLayout(speedInfoArea);
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97
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98 baseLayout->addWidget(mPNGLabel);
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99 baseLayout->addLayout(controlArea);
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100 baseLayout->addWidget(mSlider);
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101
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102 connect(&mAdvanceTimer, SIGNAL(timeout()), this, SIGNAL(advance()));
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103 setLayout(baseLayout);
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104 }
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105
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106 void PNGPlayer::showPicture(const QString& fileName, int current, int max,
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107 const QDateTime& timestamp) {
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108 QPixmap pic(mBaseDir.filePath(fileName));
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109 /* If this is too slow we could use a pixmap cache here and do
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110 * some intelligent preloading */
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111 if (pic.isNull()) {
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112 qWarning() << "Failed to load picture: " << fileName;
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113 // emit error(tr("Failed to load picture: '%1'").arg(fileName));
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114 return;
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115 }
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116 mPNGLabel->setPixmap(pic);
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117 updatePositions(current, max, timestamp);
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118 }
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119
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120 void PNGPlayer::updatePositions(int current, int max, const QDateTime& timestamp) {
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121 mMax = max;
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122 mSlider->blockSignals(true); /* We only want user generated changes */
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123 mSlider->setValue(current);
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124 mSlider->blockSignals(false);
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125 mSlider->setMaximum(max);
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126 mPositionLabel->setText("<b>" + tr("Screenshot Nr.:") + " </b>" +
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127 QString("%1 (%2)").arg(current).arg(max) + " / <b>" +
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128 tr("Timestamp:") + " </b>" + (timestamp.isValid() ?
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129 timestamp.toString(LONG_DATE_FORMAT) : tr("Unknown")));
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130
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131 if (mMax == current && mAdvanceTimer.isActive()) {
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132 togglePlay();
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133 }
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134 }
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135
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136 void PNGPlayer::setSpeed(int mSecsPerPicture) {
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137 if (mSecsPerPicture == 1000) {
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138 mCurSpeedLabel->setText(tr("%1 second per Picture").
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139 arg(mSecsPerPicture / 1000.));
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140 } else {
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141 mCurSpeedLabel->setText(tr("%1 seconds per Picture").
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142 arg(mSecsPerPicture / 1000.));
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143 }
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144 mAdvanceTimer.setInterval(mSecsPerPicture);
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145 }
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146
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147 void PNGPlayer::togglePlay() {
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148 if (mAdvanceTimer.isActive()) {
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149 mAdvanceTimer.stop();
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150 mPlayBtn->setChecked(false);
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151 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPlay));
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152 } else {
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153 mAdvanceTimer.start();
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154 mPlayBtn->setChecked(true);
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155 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPause));
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156 emit advance();
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157 }
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158 }
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159
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160 void PNGPlayer::sliderChanged() {
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161 qDebug() << "Slider moved. ";
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162 emit jumpToFrame(mSlider->value());
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163 }
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164
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165 void PNGPlayer::sliderPressed() {
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166 qDebug() << "Slider pressed. Deactivating timer. ";
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167 mAdvanceTimer.stop();
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168 }
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169
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170 void PNGPlayer::sliderReleased() {
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171 if (mPlayBtn->isChecked()) {
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172 mAdvanceTimer.start();
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173 }
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174 }
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175
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176 void PNGPlayer::firstClicked() {
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177 emit jumpToFrame(0);
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178 }
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179
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180 void PNGPlayer::lastClicked() {
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181 emit jumpToFrame(mMax);
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182 }
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183
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184 void PNGPlayer::speedChanged() {
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185 if (mSpeedSlider->value()) {
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186 setSpeed(mSpeedSlider->value() * REPLAY_SPEED_STEP_MS);
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187 } else {
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188 setSpeed(REPLAY_SPEED_STEP_MS / 2);
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189 }
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190 QSettings settings;
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191 settings.setValue(REPLAY_SPEED_KEY, mSpeedSlider->value());
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192 }
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