QMediaAvailabilityControl Class

The QMediaAvailabilityControl class supplies a control for reporting availability of a service. 更多...

头：	#include <QMediaAvailabilityControl>
qmake:	QT += multimedia
继承：	QMediaControl

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公共函数

	~QMediaAvailabilityControl ()
virtual QMultimedia::AvailabilityStatus	availability () const = 0

32 公共函数继承自 QObject

信号

void	availabilityChanged (QMultimedia::AvailabilityStatus availability )

2 信号继承自 QObject

保护函数

QMediaAvailabilityControl (QObject * parent = Q_NULLPTR)

9 保护函数继承自 QObject

宏

QMediaAvailabilityControl_iid

额外继承成员

1 特性继承自 QObject
1 公共槽继承自 QObject
11 静态公共成员继承自 QObject

详细描述

The QMediaAvailabilityControl class supplies a control for reporting availability of a service.

实例化的 QMediaObject (or its derived classes) can report any changes in availability via this control.

接口名称对于 QMediaAvailabilityControl is org.qt-project.qt.mediaavailabilitycontrol/5.0 作为定义在 QMediaAvailabilityControl_iid .

另请参阅 QMediaService::requestControl () 和 QMediaObject .

成员函数文档编制

`[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.

宏文档编制

QMediaAvailabilityControl_iid

org.qt-project.qt.mediaavailabilitycontrol/5.0

定义接口名为 QMediaAvailabilityControl 类。

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