如何在任何形状的Qgraphicsvideoitem中屏蔽视频

时间:2015-03-11 11:58:34

标签: c++ qt qgraphicsitem qmediaplayer

我使用Qgraphicsvideoitem使用Qmediaplayer显示视频。 现在,如果我有圆形项目,我该如何将视频屏蔽到该项目中。

这是我的代码和图片:

enter image description here

VideoClass::VideoClass(QGraphicsVideoItem *parent):QGraphicsVideoItem(parent)
{
    QMediaPlayer *player = new QMediaPlayer(this, QMediaPlayer::VideoSurface);
    QMediaPlaylist *playlist = new QMediaPlaylist;
    playlist->addMedia(QUrl::fromLocalFile("/root/Desktop/Content/Robotica_1080.wmv"));
    playlist->setPlaybackMode(QMediaPlaylist::Loop);
    player->setPlaylist(playlist);
    player->play();
    player->setVideoOutput(this);
}

void VideoClass::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    QGraphicsVideoItem::paint(painter, option, widget);
    painter->drawEllipse(0, 0, 400, 400);
}

QRectF VideoClass::boundingRect() const
{
    return QRectF(0,0,400,400);}

1 个答案:

答案 0 :(得分:1)

我认为您想要将视频裁剪为您正在绘制的路径。如果是这样,请使用shape和opaqueArea虚函数来执行此操作。并且不要忘记设置标志QGraphicsItem :: ItemClipsToShape。