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50
51#include "videoplayer.h"
52
53#include <QtWidgets>
54#include <QVideoWidget>
55
56VideoPlayer::VideoPlayer(QWidget *parent)
57 : QWidget(parent)
58{
59 m_mediaPlayer = new QMediaPlayer(this, QMediaPlayer::VideoSurface);
60 QVideoWidget *videoWidget = new QVideoWidget;
61
62 QAbstractButton *openButton = new QPushButton(tr(s: "Open..."));
63 connect(sender: openButton, signal: &QAbstractButton::clicked, receiver: this, slot: &VideoPlayer::openFile);
64
65 m_playButton = new QPushButton;
66 m_playButton->setEnabled(false);
67 m_playButton->setIcon(style()->standardIcon(standardIcon: QStyle::SP_MediaPlay));
68
69 connect(sender: m_playButton, signal: &QAbstractButton::clicked,
70 receiver: this, slot: &VideoPlayer::play);
71
72 m_positionSlider = new QSlider(Qt::Horizontal);
73 m_positionSlider->setRange(min: 0, max: 0);
74
75 connect(sender: m_positionSlider, signal: &QAbstractSlider::sliderMoved,
76 receiver: this, slot: &VideoPlayer::setPosition);
77
78 m_errorLabel = new QLabel;
79 m_errorLabel->setSizePolicy(hor: QSizePolicy::Preferred, ver: QSizePolicy::Maximum);
80
81 QBoxLayout *controlLayout = new QHBoxLayout;
82 controlLayout->setContentsMargins(left: 0, top: 0, right: 0, bottom: 0);
83 controlLayout->addWidget(openButton);
84 controlLayout->addWidget(m_playButton);
85 controlLayout->addWidget(m_positionSlider);
86
87 QBoxLayout *layout = new QVBoxLayout;
88 layout->addWidget(videoWidget);
89 layout->addLayout(layout: controlLayout);
90 layout->addWidget(m_errorLabel);
91
92 setLayout(layout);
93
94 m_mediaPlayer->setVideoOutput(videoWidget);
95 connect(sender: m_mediaPlayer, signal: &QMediaPlayer::stateChanged,
96 receiver: this, slot: &VideoPlayer::mediaStateChanged);
97 connect(sender: m_mediaPlayer, signal: &QMediaPlayer::positionChanged, receiver: this, slot: &VideoPlayer::positionChanged);
98 connect(sender: m_mediaPlayer, signal: &QMediaPlayer::durationChanged, receiver: this, slot: &VideoPlayer::durationChanged);
99 connect(sender: m_mediaPlayer, signal: QOverload<QMediaPlayer::Error>::of(ptr: &QMediaPlayer::error),
100 receiver: this, slot: &VideoPlayer::handleError);
101}
102
103VideoPlayer::~VideoPlayer()
104{
105}
106
107void VideoPlayer::openFile()
108{
109 QFileDialog fileDialog(this);
110 fileDialog.setAcceptMode(QFileDialog::AcceptOpen);
111 fileDialog.setWindowTitle(tr(s: "Open Movie"));
112 QStringList supportedMimeTypes = m_mediaPlayer->supportedMimeTypes();
113 if (!supportedMimeTypes.isEmpty())
114 fileDialog.setMimeTypeFilters(supportedMimeTypes);
115 fileDialog.setDirectory(QStandardPaths::standardLocations(type: QStandardPaths::MoviesLocation).value(i: 0, defaultValue: QDir::homePath()));
116 if (fileDialog.exec() == QDialog::Accepted)
117 setUrl(fileDialog.selectedUrls().constFirst());
118}
119
120void VideoPlayer::setUrl(const QUrl &url)
121{
122 m_errorLabel->setText(QString());
123 setWindowFilePath(url.isLocalFile() ? url.toLocalFile() : QString());
124 m_mediaPlayer->setMedia(media: url);
125 m_playButton->setEnabled(true);
126}
127
128void VideoPlayer::play()
129{
130 switch (m_mediaPlayer->state()) {
131 case QMediaPlayer::PlayingState:
132 m_mediaPlayer->pause();
133 break;
134 default:
135 m_mediaPlayer->play();
136 break;
137 }
138}
139
140void VideoPlayer::mediaStateChanged(QMediaPlayer::State state)
141{
142 switch(state) {
143 case QMediaPlayer::PlayingState:
144 m_playButton->setIcon(style()->standardIcon(standardIcon: QStyle::SP_MediaPause));
145 break;
146 default:
147 m_playButton->setIcon(style()->standardIcon(standardIcon: QStyle::SP_MediaPlay));
148 break;
149 }
150}
151
152void VideoPlayer::positionChanged(qint64 position)
153{
154 m_positionSlider->setValue(position);
155}
156
157void VideoPlayer::durationChanged(qint64 duration)
158{
159 m_positionSlider->setRange(min: 0, max: duration);
160}
161
162void VideoPlayer::setPosition(int position)
163{
164 m_mediaPlayer->setPosition(position);
165}
166
167void VideoPlayer::handleError()
168{
169 m_playButton->setEnabled(false);
170 const QString errorString = m_mediaPlayer->errorString();
171 QString message = "Error: ";
172 if (errorString.isEmpty())
173 message += " #" + QString::number(int(m_mediaPlayer->error()));
174 else
175 message += errorString;
176 m_errorLabel->setText(message);
177}
178

source code of qtmultimedia/examples/multimediawidgets/videowidget/videoplayer.cpp