The QMediaImageViewer class provides a means of viewing image media. More...
#include <QMediaImageViewer>
Inherits: QMediaObject.
This class was introduced in Qt Mobility 1.0.
enum | MediaStatus { NoMedia, LoadingMedia, LoadedMedia, InvalidMedia } |
enum | State { StoppedState, PlayingState, PausedState } |
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QMediaImageViewer ( QObject * parent = 0 ) | |
~QMediaImageViewer () | |
int | elapsedTime () const |
QMediaContent | media () const |
MediaStatus | mediaStatus () const |
QMediaPlaylist * | playlist () const |
void | setVideoOutput ( QVideoWidget * widget ) |
void | setVideoOutput ( QGraphicsVideoItem * item ) |
void | setVideoOutput ( QAbstractVideoSurface * surface ) |
State | state () const |
int | timeout () const |
void | pause () |
void | play () |
void | setMedia ( const QMediaContent & media ) |
void | setPlaylist ( QMediaPlaylist * playlist ) |
void | setTimeout ( int timeout ) |
void | stop () |
void | elapsedTimeChanged ( int time ) |
void | mediaChanged ( const QMediaContent & media ) |
void | mediaStatusChanged ( QMediaImageViewer::MediaStatus status ) |
void | stateChanged ( QMediaImageViewer::State state ) |
The QMediaImageViewer class provides a means of viewing image media.
QMediaImageViewer is used together with a media display object such as QVideoWidget to present an image. A display object is attached to the image viewer by means of the bind function.
viewer = new QMediaImageViewer(this); videoWidget = new QVideoWidget; viewer->bind(videoWidget); videoWidget->show();
QMediaImageViewer can be paired with a QMediaPlaylist to create a slide show of images. Constructing a QMediaPlaylist with a pointer to an instance of QMediaImageViewer will attach it to the image viewer; changing the playlist's selection will then change the media displayed by the image viewer. With a playlist attached QMediaImageViewer's play(), pause(), and stop() slots can be control the progression of the playlist. The timeout property determines how long an image is displayed for before progressing to the next in the playlist, and the elapsedTime property holds how the duration the current image has been displayed for.
playlist = new QMediaPlaylist(this); playlist->setPlaybackMode(QMediaPlaylist::Loop); playlist->addMedia(image1); playlist->addMedia(image2); playlist->addMedia(image3); viewer->setPlaylist(playlist); viewer->setTimeout(5000); viewer->play();
Enumerates the status of an image viewer's current media.
Constant | Value | Description |
---|---|---|
QMediaImageViewer::NoMedia | 0 | There is no current media. |
QMediaImageViewer::LoadingMedia | 1 | The image viewer is loading the current media. |
QMediaImageViewer::LoadedMedia | 2 | The image viewer has loaded the current media. |
QMediaImageViewer::InvalidMedia | 3 | The current media cannot be loaded. |
Enumerates the possible control states an image viewer may be in. The control state of an image viewer determines whether the image viewer is automatically progressing through images in an attached playlist.
Constant | Value | Description |
---|---|---|
QMediaImageViewer::StoppedState | 0 | The image viewer is stopped, and will not automatically move to the next image. The elapsedTime is fixed at 0. |
QMediaImageViewer::PlayingState | 1 | The slide show is playing, and will move to the next image when the elapsedTime reaches the timeout. The elapsedTime is being incremented. |
QMediaImageViewer::PausedState | 2 | The image viewer is paused, and will not automatically move the to next image. The elapsedTime is fixed at the time the image viewer was paused. |
This property holds the amount of time in milliseconds that has elapsed since the current image was loaded.
The elapsed time only increases while the image viewer is in the PlayingState. If stopped the elapsed time will be reset to 0.
This property was introduced in Qt Mobility 1.0.
Access functions:
int | elapsedTime () const |
Notifier signal:
void | elapsedTimeChanged ( int time ) |
This property holds the media an image viewer is presenting.
This property was introduced in Qt Mobility 1.0.
Access functions:
QMediaContent | media () const |
void | setMedia ( const QMediaContent & media ) |
Notifier signal:
void | mediaChanged ( const QMediaContent & media ) |
This property holds the status of the current media.
This property was introduced in Qt Mobility 1.0.
Access functions:
MediaStatus | mediaStatus () const |
Notifier signal:
void | mediaStatusChanged ( QMediaImageViewer::MediaStatus status ) |
This property holds the playlist control state of a slide show.
This property was introduced in Qt Mobility 1.0.
Access functions:
State | state () const |
Notifier signal:
void | stateChanged ( QMediaImageViewer::State state ) |
This property holds the amount of time in milliseconds an image is displayed for before moving to the next image.
The timeout only applies if the image viewer has a playlist attached and is in the PlayingState.
This property was introduced in Qt Mobility 1.0.
Access functions:
int | timeout () const |
void | setTimeout ( int timeout ) |
Constructs a new image viewer with the given parent.
Destroys an image viewer.
Signals that the amount of time in milliseconds since the current image was loaded has changed.
This signal is emitted at a regular interval when the image viewer is in the PlayingState and an image is loaded. The notification interval is controlled by the QMediaObject::notifyInterval property.
This function was introduced in Qt Mobility 1.0.
See also timeout and QMediaObject::notifyInterval.
Signals that the media an image viewer is presenting has changed.
This function was introduced in Qt Mobility 1.0.
Signals the the status of the current media has changed.
This function was introduced in Qt Mobility 1.0.
Pauses a slide show.
The current media and elapsed time are retained. If resumed, the current image will be displayed for the remainder of the time out period before the next image is loaded.
This function was introduced in Qt Mobility 1.0.
Starts a slide show.
If the playlist has no current media this will start at the beginning of the playlist, otherwise it will resume from the current media.
If no playlist is attached to an image viewer this will do nothing.
This function was introduced in Qt Mobility 1.0.
Returns the current playlist, or 0 if none.
This function was introduced in Qt Mobility 1.0.
See also setPlaylist().
Use playlist as the source of images to be displayed in the viewer.
This function was introduced in Qt Mobility 1.0.
See also playlist().
Sets a video widget as the current video output.
This will unbind any previous video output bound with setVideoOutput().
This function was introduced in Qt Mobility 1.1.
Sets a video item as the current video output.
This will unbind any previous video output bound with setVideoOutput().
This function was introduced in Qt Mobility 1.1.
Sets a video surface as the video output of a image viewer.
If a video output has already been set on the image viewer the new surface will replace it.
This function was introduced in Qt Mobility 1.2.
Signals that the playlist control state of an image viewer has changed.
This function was introduced in Qt Mobility 1.0.
Stops a slide show.
The current media is retained, but the elapsed time is discarded. If resumed, the current image will be displayed for the full time out period before the next image is loaded.
This function was introduced in Qt Mobility 1.0.
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