QMediaAvailabilityControl Class
The QMediaAvailabilityControl class supplies a control for reporting availability of a service. 更多...
| 头文件: | #include <QMediaAvailabilityControl> |
| qmake: | QT += multimedia |
| 基类: | QMediaControl |
公有函数
| ~QMediaAvailabilityControl() | |
| virtual QMultimedia::AvailabilityStatus | availability() const = 0 |
- 32 个公有函数继承自 QObject
信号
| void | availabilityChanged(QMultimedia::AvailabilityStatus availability) |
- 2 个信号继承自 QObject
受保护的函数
| QMediaAvailabilityControl(QObject *parent = Q_NULLPTR) |
- 9 个受保护的函数继承自 QObject
Macros
其他继承的成员
详细描述
The QMediaAvailabilityControl class supplies a control for reporting availability of a service.
An instance of QMediaObject (or its derived classes) can report any changes in availability via this control.
The interface name of QMediaAvailabilityControl is org.qt-project.qt.mediaavailabilitycontrol/5.0 as defined in QMediaAvailabilityControl_iid.
参见 QMediaService::requestControl() and QMediaObject.
成员函数
[protected] QMediaAvailabilityControl::QMediaAvailabilityControl(QObject *parent = Q_NULLPTR)
Constructs an availability control object with parent.
QMediaAvailabilityControl::~QMediaAvailabilityControl()
Destruct the availability control object.
[pure virtual] QMultimedia::AvailabilityStatus QMediaAvailabilityControl::availability() const
Returns the current availability of this instance of the media service. If the availability changes at run time (for example, some other media client takes all media resources) the availabilityChanges() signal should be emitted.
[signal] void QMediaAvailabilityControl::availabilityChanged(QMultimedia::AvailabilityStatus availability)
Signal emitted when the current availability value changed.
宏
QMediaAvailabilityControl_iid
org.qt-project.qt.mediaavailabilitycontrol/5.0
Defines the interface name of the QMediaAvailabilityControl class.