所以我有一个QMediaPlayer播放视频,它包含在QGraphicsScene内部的QGraphicsVideoItem中。我也在QGraphicsScene里面有文字。 QGraphicsView调整大小为文本大小,但不调整视频大小,因此我只能看到视频的左上角。
有没有办法让视频拉伸以填充可用空间?有没有办法将视频置于可用空间中,而不是卡在左上角?
以下是我目前的代码。
videoWidget = new VideoWidget();
QGraphicsView* graphicsView = new QGraphicsView(videoWidget);
QGraphicsScene* scene = new QGraphicsScene(graphicsView);
QGraphicsVideoItem* videoItem = new QGraphicsVideoItem();
QGraphicsTextItem* text = new QGraphicsTextItem("Lorem ipsum ");
text->setDefaultTextColor(Qt::white);
graphicsView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
graphicsView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
player = new QMediaPlayer();
player->setVideoOutput(videoItem);
graphicsView->setScene(scene);
graphicsView->scene()->addItem(videoItem);
graphicsView->scene()->addItem(text);
playlist = new QMediaPlaylist();
playlist->setPlaybackMode(QMediaPlaylist::Loop);
player->setPlaylist(playlist);
playlistModel = new PlaylistModel();
playlistModel->setPlaylist(playlist);`
答案 0 :(得分:0)
所以我想出了一种调整视频大小的方法,基本上我在videoWidget中实例化了resizeEvent,以便更新图形项的大小。
void VideoWidget::resizeEvent(QResizeEvent *event)
{
QSize size = event->size();
if(graphicsView != NULL)
{//Changes the size of the area the video can display in
graphicsView->setMinimumSize(size);
graphicsView->setMaximumSize(size);
}
if(graphicsVideoItem != NULL)
{//This changes the size/pos of the video itself
graphicsVideoItem->setSize(size);
}
QVideoWidget::resizeEvent(event);
}
class VideoWidget : public QVideoWidget