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annotate src/pngplayer.cpp @ 20:6b5e7d6bf4a2 0.0.1

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Emit warning when a picture can not be loaded
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 14 Apr 2015 18:56:54 +0200
parents f290e8c4e097
children 64a51a42c01f
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 #include <QApplication>
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18 #include <QStyle>
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19
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20 #include <QDebug>
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21
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22 PNGPlayer::PNGPlayer(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f) {
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23 setupGUI();
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24 QSettings settings;
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25 mSpeedSlider->setValue(settings.value(REPLAY_SPEED_KEY, REPLAY_SPEED_DEFAULT).toInt());
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26 speedChanged();
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27 }
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28
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29 void PNGPlayer::setupGUI() {
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30 QVBoxLayout *baseLayout = new QVBoxLayout;
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31 mPNGLabel = new ImageLabel;
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32 mPNGLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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33
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34 QHBoxLayout *controlArea = new QHBoxLayout;
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35 QHBoxLayout *controlBtns = new QHBoxLayout;
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36 controlArea->addLayout(controlBtns);
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37 controlArea->addStretch(-1);
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38
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39 QPushButton *firstBtn = new QPushButton;
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40 firstBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSkipBackward));
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41 controlBtns->addWidget(firstBtn);
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42 connect(firstBtn, &QPushButton::clicked, this, &PNGPlayer::firstClicked);
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43
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44 QPushButton *prevBtn = new QPushButton;
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45 prevBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSeekBackward));
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46 controlBtns->addWidget(prevBtn);
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47 connect(prevBtn, &QPushButton::clicked, this, &PNGPlayer::back);
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48
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49 mPlayBtn = new QPushButton;
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50 mPlayBtn->setCheckable(true);
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51 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPlay));
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52 controlBtns->addWidget(mPlayBtn);
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53 connect(mPlayBtn, &QPushButton::clicked, this, &PNGPlayer::togglePlay);
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54
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55 QPushButton *nextBtn = new QPushButton;
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56 nextBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSeekForward));
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57 connect(nextBtn, &QPushButton::clicked, this, &PNGPlayer::advance);
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58 controlBtns->addWidget(nextBtn);
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59
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60 QPushButton *lastBtn = new QPushButton;
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61 lastBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSkipForward));
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62 controlBtns->addWidget(lastBtn);
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63 connect(lastBtn, &QPushButton::clicked, this, &PNGPlayer::lastClicked);
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64
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65 mSlider = new QSlider(Qt::Horizontal);
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66 mSlider->setTickPosition(QSlider::TicksBelow);
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67 connect(mSlider, &QSlider::valueChanged, this, &PNGPlayer::sliderChanged);
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68 connect(mSlider, &QSlider::sliderPressed, this, &PNGPlayer::sliderPressed);
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69 connect(mSlider, &QSlider::sliderReleased, this, &PNGPlayer::sliderReleased);
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70
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71 QVBoxLayout *speedInfoArea = new QVBoxLayout;
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72 QHBoxLayout *speedArea = new QHBoxLayout;
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73 speedInfoArea->addLayout(speedArea);
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74
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75 QLabel *speedLabel = new QLabel(tr("Speed:"));
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76 speedArea->addWidget(speedLabel);
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77
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78 mSpeedSlider = new QSlider(Qt::Horizontal);
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79 mSpeedSlider->setMaximum(10);
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80 mSpeedSlider->setTickInterval(1);
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81 mSpeedSlider->setTickPosition(QSlider::TicksBelow);
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82 mSpeedSlider->setTracking(false);
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83 mSpeedSlider->setInvertedAppearance(true);
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84
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85 speedArea->addWidget(mSpeedSlider);
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86 connect(mSpeedSlider, &QSlider::valueChanged, this, &PNGPlayer::speedChanged);
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87
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88 mCurSpeedLabel = new QLabel;
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89 speedArea->addWidget(mCurSpeedLabel);
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90 speedArea->addStretch(-1);
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91
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92 mPositionLabel = new QLabel;
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93 speedInfoArea->addWidget(mPositionLabel);
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94
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95 controlArea->addLayout(speedInfoArea);
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96
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97 baseLayout->addWidget(mPNGLabel);
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98 baseLayout->addLayout(controlArea);
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99 baseLayout->addWidget(mSlider);
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100
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101 connect(&mAdvanceTimer, SIGNAL(timeout()), this, SIGNAL(advance()));
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102 setLayout(baseLayout);
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103 }
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104
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105 void PNGPlayer::showPicture(const QString& fileName, int current, int max,
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106 const QDateTime& timestamp) {
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107 QPixmap pic(mBaseDir.filePath(fileName));
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108 /* If this is too slow we could use a pixmap cache here and do
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109 * some intelligent preloading */
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110 if (pic.isNull()) {
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111 qWarning() << "Failed to load picture: " << fileName;
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112 // emit error(tr("Failed to load picture: '%1'").arg(fileName));
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113 return;
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114 }
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115 mPNGLabel->setPixmap(pic);
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116 updatePositions(current, max, timestamp);
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117 }
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118
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119 void PNGPlayer::updatePositions(int current, int max, const QDateTime& timestamp) {
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120 mMax = max;
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121 mSlider->blockSignals(true); /* We only want user generated changes */
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122 mSlider->setValue(current);
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123 mSlider->blockSignals(false);
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124 mSlider->setMaximum(max);
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125 mPositionLabel->setText("<b>" + tr("Screenshot Nr.:") + " </b>" +
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126 QString("%1 (%2)").arg(current).arg(max) + " / <b>" +
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127 tr("Timestamp:") + " </b>" + (timestamp.isValid() ?
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128 timestamp.toString(LONG_DATE_FORMAT) : tr("Unknown")));
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129
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130 if (mMax == current && mAdvanceTimer.isActive()) {
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131 togglePlay();
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132 }
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133 }
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134
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135 void PNGPlayer::setSpeed(int mSecsPerPicture) {
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136 if (mSecsPerPicture == 1000) {
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137 mCurSpeedLabel->setText(tr("%1 second per Picture").
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138 arg(mSecsPerPicture / 1000.));
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139 } else {
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140 mCurSpeedLabel->setText(tr("%1 seconds per Picture").
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141 arg(mSecsPerPicture / 1000.));
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142 }
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143 mAdvanceTimer.setInterval(mSecsPerPicture);
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144 }
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145
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146 void PNGPlayer::togglePlay() {
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147 if (mAdvanceTimer.isActive()) {
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148 mAdvanceTimer.stop();
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149 mPlayBtn->setChecked(false);
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150 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPlay));
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151 } else {
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152 mAdvanceTimer.start();
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153 mPlayBtn->setChecked(true);
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154 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPause));
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155 emit advance();
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156 }
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157 }
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158
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159 void PNGPlayer::sliderChanged() {
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160 qDebug() << "Slider moved. ";
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161 emit jumpToFrame(mSlider->value());
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162 }
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163
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164 void PNGPlayer::sliderPressed() {
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165 qDebug() << "Slider pressed. Deactivating timer. ";
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166 mAdvanceTimer.stop();
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167 }
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168
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169 void PNGPlayer::sliderReleased() {
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170 if (mPlayBtn->isChecked()) {
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171 mAdvanceTimer.start();
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172 }
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173 }
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174
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175 void PNGPlayer::firstClicked() {
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176 emit jumpToFrame(0);
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177 }
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178
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179 void PNGPlayer::lastClicked() {
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180 emit jumpToFrame(mMax);
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181 }
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182
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183 void PNGPlayer::speedChanged() {
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184 if (mSpeedSlider->value()) {
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185 setSpeed(mSpeedSlider->value() * REPLAY_SPEED_STEP_MS);
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186 } else {
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187 setSpeed(REPLAY_SPEED_STEP_MS / 2);
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188 }
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189 QSettings settings;
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190 settings.setValue(REPLAY_SPEED_KEY, mSpeedSlider->value());
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191 }
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