我正在开发一个简单的视频循环应用程序,想知道是否可以将音量滑块控件添加到 QVideoWidget 的全屏模式。
我希望该应用在启动时显示一个小的 QVideoWidget 。然后,双击视频窗口小部件后,我希望视频可以通过附加的音量滑块全屏显示。
目前,我有一个基于 QMultimedia 示例的代码,如下所示:
在 videowidget.h
#ifndef VIDEOWIDGET_H
#define VIDEOWIDGET_H
#include <QVideoWidget>
class VideoWidget : public QVideoWidget
{
Q_OBJECT
public:
VideoWidget(QWidget *parent = 0);
protected:
void keyPressEvent(QKeyEvent *event);
void mouseDoubleClickEvent(QMouseEvent *event);
void mousePressEvent(QMouseEvent *event);
};
#endif // VIDEOWIDGET_H
videowidget.cpp
void VideoWidget::mouseDoubleClickEvent(QMouseEvent *event)
{
setFullScreen(!isFullScreen());
event->accept();
}
我能想到的一个解决方案是创建一个基本的小部件来绘制另一个videowidget和一个滑块并将其加载到双击事件中,但是我很难实现它。我不知道如何将媒体播放器的当前播放状态转移到新的视频小部件。
答案 0 :(得分:0)
#include <QApplication>
#include <QMouseEvent>
#include <QVideoWidget>
#include <QSlider>
#include <QMediaPlayer>
#include <QFileDialog>
/**
* @brief The VideoWidget class
*
* VideoWidget contains QSlider & QVideoWidget
*/
class VideoWidget : public QWidget
{
Q_OBJECT
QVideoWidget* videoWidget;
QSlider* slider;
public:
VideoWidget() :
videoWidget(new QVideoWidget(this)),
slider(new QSlider(Qt::Horizontal, this))
{
slider->hide();
slider->move(10, 10); // Put slider where you want.
slider->setRange(0, 100);
const QMediaContent meida(QFileDialog::getOpenFileUrl());
QMediaPlayer* player = new QMediaPlayer(this);
player->setVideoOutput(videoWidget);
player->setMedia(meida);
player->play();
slider->setValue(player->volume());
connect(slider, &QSlider::valueChanged, player, &QMediaPlayer::setVolume);
}
virtual ~VideoWidget() {}
protected:
/**
* @brief changeEvent
* @param event
*
* Listen to window state change event,
* and show the slider only when the state is WindowFullScreen.
*/
void changeEvent(QEvent* event) {
if(event->type() == QEvent::WindowStateChange)
slider->setVisible(windowState() == Qt::WindowFullScreen);
QWidget::changeEvent(event);
}
/**
* @brief resizeEvent
* @param event
*
* Make videoWidget fill the parent widget.
*/
void resizeEvent(QResizeEvent* event) {
videoWidget->resize(size());
event->accept();
}
void mouseDoubleClickEvent(QMouseEvent *event) {
if(!isFullScreen())
showFullScreen();
else
showNormal();
event->accept();
}
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
VideoWidget w;
w.resize(500, 400);
w.show();
return a.exec();
}
#include "main.moc"