Qt 5.7Qt MultimediaC++ ClassesQGraphicsVideoItem
Qt 5.7.1 Reference Documentation

Contents

QGraphicsVideoItem Class

The QGraphicsVideoItem class provides a graphics item which display video produced by a QMediaObject. More...

Header: #include <QGraphicsVideoItem>
qmake: QT += multimediawidgets
Inherits: QGraphicsObject and QMediaBindableInterface

Properties

Public Functions

QGraphicsVideoItem(QGraphicsItem *parent = Q_NULLPTR)
~QGraphicsVideoItem()
Qt::AspectRatioMode aspectRatioMode() const
QSizeF nativeSize() const
QPointF offset() const
void setAspectRatioMode(Qt::AspectRatioMode mode)
void setOffset(const QPointF &offset)
void setSize(const QSizeF &size)
QSizeF size() const

Reimplemented Public Functions

virtual QRectF boundingRect() const
virtual QMediaObject *mediaObject() const
virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = Q_NULLPTR)

Signals

void nativeSizeChanged(const QSizeF &size)

Additional Inherited Members

Detailed Description

The QGraphicsVideoItem class provides a graphics item which display video produced by a QMediaObject.

Attaching a QGraphicsVideoItem to a QMediaObject allows it to display the video or image output of that media object. A QGraphicsVideoItem is attached to a media object by passing a pointer to the QMediaObject to the setMediaObject() function.


  player = new QMediaPlayer(this);

  QGraphicsVideoItem *item = new QGraphicsVideoItem;
  player->setVideoOutput(item);
  graphicsView->scene()->addItem(item);
  graphicsView->show();

  player->setMedia(QUrl("http://example.com/myclip4.ogv"));
  player->play();

Note: Only a single display output can be attached to a media object at one time.

See also QMediaObject, QMediaPlayer, and QVideoWidget.

Property Documentation

aspectRatioMode : Qt::AspectRatioMode

This property holds how a video is scaled to fit the graphics item's size.

Access functions:

Qt::AspectRatioMode aspectRatioMode() const
void setAspectRatioMode(Qt::AspectRatioMode mode)

mediaObject : QMediaObject * const

This property holds the media object which provides the video displayed by a graphics item.

Access functions:

virtual QMediaObject *mediaObject() const

nativeSize : const QSizeF

This property holds the native size of the video.

Access functions:

QSizeF nativeSize() const

Notifier signal:

void nativeSizeChanged(const QSizeF &size)

offset : QPointF

This property holds the video item's offset.

QGraphicsVideoItem will draw video using the offset for its top left corner.

Access functions:

QPointF offset() const
void setOffset(const QPointF &offset)

size : QSizeF

This property holds the video item's size.

QGraphicsVideoItem will draw video scaled to fit size according to its fillMode.

Access functions:

QSizeF size() const
void setSize(const QSizeF &size)

Member Function Documentation

QGraphicsVideoItem::QGraphicsVideoItem(QGraphicsItem *parent = Q_NULLPTR)

Constructs a graphics item that displays video.

The parent is passed to QGraphicsItem.

QGraphicsVideoItem::~QGraphicsVideoItem()

Destroys a video graphics item.

[virtual] QRectF QGraphicsVideoItem::boundingRect() const

Reimplemented from QGraphicsItem::boundingRect().

[signal] void QGraphicsVideoItem::nativeSizeChanged(const QSizeF &size)

Signals that the native size of the video has changed.

Note: Notifier signal for property nativeSize.

[virtual] void QGraphicsVideoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = Q_NULLPTR)

Reimplemented from QGraphicsItem::paint().

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