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annotate src/pngplayer.cpp @ 103:43af5fccf61e

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Fix possible double free on exit
author Andre Heinecke <andre.heinecke@intevation.de>
date Fri, 18 Nov 2016 12:47:21 +0100
parents 73e6b6b12412
children
rev   line source
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64a51a42c01f Assign copyright correctly
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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 double settingsSecs = settings.value(REPLAY_SPEED_KEY, REPLAY_SPEED_DEFAULT).toDouble();
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27 if (settingsSecs != 0) {
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28 mSpeedSlider->setValue(settingsSecs * 1000 / REPLAY_SPEED_STEP_MS);
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29 }
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30 speedChanged();
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31 }
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32
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33 void PNGPlayer::setupGUI() {
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34 QVBoxLayout *baseLayout = new QVBoxLayout;
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35 mPNGLabel = new ImageLabel;
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36 mPNGLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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37 connect(mPNGLabel, &ImageLabel::doubleClicked, this, &PNGPlayer::togglePicFullscreen);
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38 connect(mPNGLabel, &ImageLabel::closeRequested, this, &PNGPlayer::togglePicFullscreen);
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39
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40 QHBoxLayout *controlArea = new QHBoxLayout;
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41 QHBoxLayout *controlBtns = new QHBoxLayout;
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42 controlArea->addLayout(controlBtns);
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43 controlArea->addStretch(-1);
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44
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45 QPushButton *firstBtn = new QPushButton;
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46 firstBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSkipBackward));
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47 controlBtns->addWidget(firstBtn);
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48 connect(firstBtn, &QPushButton::clicked, this, &PNGPlayer::firstClicked);
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49
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50 QPushButton *prevBtn = new QPushButton;
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51 prevBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSeekBackward));
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52 controlBtns->addWidget(prevBtn);
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53 connect(prevBtn, &QPushButton::clicked, this, &PNGPlayer::back);
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54
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55 mPlayBtn = new QPushButton;
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56 mPlayBtn->setCheckable(true);
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57 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPlay));
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58 controlBtns->addWidget(mPlayBtn);
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59 connect(mPlayBtn, &QPushButton::clicked, this, &PNGPlayer::togglePlay);
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60
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61 QPushButton *nextBtn = new QPushButton;
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62 nextBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSeekForward));
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63 connect(nextBtn, &QPushButton::clicked, this, &PNGPlayer::advance);
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64 controlBtns->addWidget(nextBtn);
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65
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66 QPushButton *lastBtn = new QPushButton;
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67 lastBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaSkipForward));
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68 controlBtns->addWidget(lastBtn);
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69 connect(lastBtn, &QPushButton::clicked, this, &PNGPlayer::lastClicked);
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70
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71 mSlider = new QSlider(Qt::Horizontal);
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72 mSlider->setTickPosition(QSlider::TicksBelow);
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73 connect(mSlider, &QSlider::valueChanged, this, &PNGPlayer::sliderChanged);
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74 connect(mSlider, &QSlider::sliderPressed, this, &PNGPlayer::sliderPressed);
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75 connect(mSlider, &QSlider::sliderReleased, this, &PNGPlayer::sliderReleased);
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76
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77 QVBoxLayout *speedInfoArea = new QVBoxLayout;
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78 QHBoxLayout *speedArea = new QHBoxLayout;
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79 speedInfoArea->addLayout(speedArea);
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80
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81 QLabel *speedLabel = new QLabel(tr("Speed:"));
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82 speedArea->addWidget(speedLabel);
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83
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84 mSpeedSlider = new QSlider(Qt::Horizontal);
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85 mSpeedSlider->setMaximum(10);
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86 mSpeedSlider->setTickInterval(1);
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87 mSpeedSlider->setTickPosition(QSlider::TicksBelow);
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88 mSpeedSlider->setTracking(false);
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89 mSpeedSlider->setInvertedAppearance(true);
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90 mSpeedSlider->setSingleStep(1);
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91 mSpeedSlider->setPageStep(1);
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92
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93 speedArea->addWidget(mSpeedSlider);
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94 connect(mSpeedSlider, &QSlider::valueChanged, this, &PNGPlayer::speedChanged);
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95
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96 mCurSpeedLabel = new QLabel;
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97 speedArea->addWidget(mCurSpeedLabel);
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98 speedArea->addStretch(-1);
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99
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100 mPositionLabel = new QLabel;
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101 speedInfoArea->addWidget(mPositionLabel);
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102
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103 controlArea->addLayout(speedInfoArea);
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104
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105 baseLayout->addWidget(mPNGLabel);
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106 baseLayout->addLayout(controlArea);
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107 baseLayout->addWidget(mSlider);
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108
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109 connect(&mAdvanceTimer, SIGNAL(timeout()), this, SIGNAL(advance()));
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110 setLayout(baseLayout);
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111 }
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112
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113 void PNGPlayer::showPicture(const QString& fileName, int current, int max,
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114 const QString& timestamp, int number) {
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115 QPixmap pic(mBaseDir.filePath(fileName));
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116 /* If this is too slow we could use a pixmap cache here and do
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117 * some intelligent preloading */
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118 if (pic.isNull()) {
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119 qWarning() << "Failed to load picture: " << fileName;
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120 // emit error(tr("Failed to load picture: '%1'").arg(fileName));
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121 QIcon errIcon = QApplication::style()->standardIcon(QStyle::SP_MessageBoxCritical);
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122 mPNGLabel->setPixmap(errIcon.pixmap(QSize(128, 128)));
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123 } else {
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124 mPNGLabel->setPixmap(pic);
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125 }
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126 updatePositions(current, max, timestamp, number);
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127 }
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128
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129 void PNGPlayer::updatePositions(int current, int max, const QString& timestamp,
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130 int number) {
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131 mMax = max;
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132 mSlider->blockSignals(true); /* We only want user generated changes */
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133 mSlider->setValue(current);
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134 mSlider->blockSignals(false);
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135 mSlider->setMaximum(max);
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136 mPositionLabel->setText("<b>" + tr("Screenshot Nr.:") + " </b>" +
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137 QString("%1 (%2)").arg(current + 1).arg(max + 1) +
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138 "/ <b>" + tr("Index Nr.:") + " </b>" + QString::number(number) + " / <b>" +
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139 tr("Timestamp:") + " </b>" + timestamp);
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140
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141 if (mMax == current && mAdvanceTimer.isActive()) {
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142 togglePlay();
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143 }
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144 }
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145
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146 void PNGPlayer::setSpeed(int mSecsPerPicture) {
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147 if (mSecsPerPicture == 1000) {
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148 mCurSpeedLabel->setText(tr("%1 second per Picture").
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149 arg(mSecsPerPicture / 1000.));
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150 } else {
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151 mCurSpeedLabel->setText(tr("%1 seconds per Picture").
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152 arg(mSecsPerPicture / 1000.));
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153 }
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154 mAdvanceTimer.setInterval(mSecsPerPicture);
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155 }
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156
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157 void PNGPlayer::togglePlay() {
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158 if (mAdvanceTimer.isActive()) {
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159 mAdvanceTimer.stop();
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160 mPlayBtn->setChecked(false);
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161 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPlay));
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162 } else {
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163 mAdvanceTimer.start();
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164 mPlayBtn->setChecked(true);
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165 mPlayBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_MediaPause));
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166 emit advance();
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167 }
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168 }
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169
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170 void PNGPlayer::sliderChanged() {
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171 qDebug() << "Slider moved. ";
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172 emit jumpToFrame(mSlider->value());
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173 }
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174
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175 void PNGPlayer::sliderPressed() {
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176 qDebug() << "Slider pressed. Deactivating timer. ";
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177 mAdvanceTimer.stop();
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178 }
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179
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180 void PNGPlayer::sliderReleased() {
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181 if (mPlayBtn->isChecked()) {
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182 mAdvanceTimer.start();
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183 }
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184 }
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185
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186 void PNGPlayer::firstClicked() {
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187 emit jumpToFrame(0);
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188 }
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189
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190 void PNGPlayer::lastClicked() {
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191 emit jumpToFrame(mMax);
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192 }
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193
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194 void PNGPlayer::speedChanged() {
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195 if (mSpeedSlider->value()) {
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196 setSpeed(mSpeedSlider->value() * REPLAY_SPEED_STEP_MS);
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197 } else {
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198 setSpeed(REPLAY_SPEED_STEP_MS / 2);
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199 }
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200 QSettings settings;
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201 settings.setValue(REPLAY_SPEED_KEY, (mSpeedSlider->value() * REPLAY_SPEED_STEP_MS) / 1000.0);
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202 }
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203
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204 void PNGPlayer::togglePicFullscreen() {
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205 QSettings settings;
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206 bool enabled = settings.value(DETACHABLE_IMAGE_KEY, DETACHABLE_IMAGE_DEFAULT).toBool();
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207 settings.setValue(DETACHABLE_IMAGE_KEY, enabled);
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208
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209 if (!enabled) {
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210 return;
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211 }
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212
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213 QVBoxLayout *baseLayout = qobject_cast<QVBoxLayout*>(layout());
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214 if (!baseLayout) {
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215 qWarning() << "Wrong layout!";
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216 return;
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217 }
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218 if (baseLayout->indexOf(mPNGLabel) == -1) {
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219 baseLayout->insertWidget(0, mPNGLabel);
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220 } else {
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221 baseLayout->removeWidget(mPNGLabel);
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222 mPNGLabel->setParent(NULL, Qt::Tool);
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223 mPNGLabel->showMaximized();
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224 }
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225 }
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226
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227 void PNGPlayer::close() {
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228 QWidget::close();
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229 }
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