QMediaAvailabilityControl Class

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

頭：	#include <QMediaAvailabilityControl>
qmake:	QT += multimedia
繼承：	QMediaControl

該類已過時。 提供它是為使舊源代碼能繼續工作。強烈建議不要在新代碼中使用它。

所有成員列錶，包括繼承成員

公共函數

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

信號

void	availabilityChanged (QMultimedia::AvailabilityStatus availability )

保護函數

QMediaAvailabilityControl (QObject * parent = nullptr)

宏

QMediaAvailabilityControl_iid

詳細描述

實例化的 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 作為定義在 QMediaAvailabilityControl_iid .

另請參閱 QMediaService::requestControl () 和 QMediaObject .

成員函數文檔編製

`[protected]` QMediaAvailabilityControl:: QMediaAvailabilityControl ( QObject * parent = nullptr)

Constructs an availability control object with parent .

`[signal]` void QMediaAvailabilityControl:: availabilityChanged ( QMultimedia::AvailabilityStatus availability )

Signal emitted when the current availability value changed.

`[虛擬]` 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.

宏文檔編製

QMediaAvailabilityControl_iid

org.qt-project.qt.mediaavailabilitycontrol/5.0

定義接口名為 QMediaAvailabilityControl 類。