内容

• 公共函数
• 信号
• 静态公共成员
• 保护函数
• 宏
• 详细描述

QCameraZoomControl Class

The QCameraZoomControl class supplies control for optical and digital camera zoom. 更多...

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

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• 过时成员

公共函数

virtual	~QCameraZoomControl ()
virtual qreal	currentDigitalZoom () const = 0
virtual qreal	currentOpticalZoom () const = 0
virtual qreal	maximumDigitalZoom () const = 0
virtual qreal	maximumOpticalZoom () const = 0
virtual qreal	requestedDigitalZoom () const = 0
virtual qreal	requestedOpticalZoom () const = 0
virtual void	zoomTo (qreal optical , qreal digital ) = 0

• 31 公共函数继承自 QObject

信号

void	currentDigitalZoomChanged (qreal zoom )
void	currentOpticalZoomChanged (qreal zoom )
void	maximumDigitalZoomChanged (qreal zoom )
void	maximumOpticalZoomChanged (qreal zoom )
void	requestedDigitalZoomChanged (qreal zoom )
void	requestedOpticalZoomChanged (qreal zoom )

• 2 信号继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

• 9 静态公共成员继承自 QObject

保护函数

QCameraZoomControl (QObject * parent = nullptr)

• 9 保护函数继承自 QObject

宏

QCameraZoomControl_iid

额外继承成员

• 1 特性继承自 QObject
• 1 公共槽继承自 QObject

详细描述

The QCameraZoomControl class supplies control for optical and digital camera zoom.

接口名称对于 QCameraZoomControl is org.qt-project.qt.camerazoomcontrol/5.0 作为定义在 QCameraZoomControl_iid .

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

成员函数文档编制

[protected] QCameraZoomControl:: QCameraZoomControl ( QObject * parent = nullptr)

Constructs a camera zoom control object with parent .

[虚拟] QCameraZoomControl:: ~QCameraZoomControl ()

Destruct the camera zoom control object.

[pure virtual] qreal QCameraZoomControl:: currentDigitalZoom () const

Return the current digital zoom value.

[signal] void QCameraZoomControl:: currentDigitalZoomChanged ( qreal zoom )

Signal emitted when the current digital zoom value changed.

[pure virtual] qreal QCameraZoomControl:: currentOpticalZoom () const

Return the current optical zoom value.

[signal] void QCameraZoomControl:: currentOpticalZoomChanged ( qreal zoom )

Signal emitted when the current optical zoom value changed.

[pure virtual] qreal QCameraZoomControl:: maximumDigitalZoom () const

Returns the maximum digital zoom value, or 1.0 if digital zoom is not supported.

[signal] void QCameraZoomControl:: maximumDigitalZoomChanged ( qreal zoom )

Signal emitted when the maximum supported digital zoom value changed.

The maximum supported zoom value can depend on other camera settings, like capture mode or resolution.

[pure virtual] qreal QCameraZoomControl:: maximumOpticalZoom () const

Returns the maximum optical zoom value, or 1.0 if optical zoom is not supported.

[signal] void QCameraZoomControl:: maximumOpticalZoomChanged ( qreal zoom )

Signal emitted when the maximum supported optical zoom value changed.

The maximum supported zoom value can depend on other camera settings, like focusing mode.

[pure virtual] qreal QCameraZoomControl:: requestedDigitalZoom () const

Return the requested digital zoom value.

[signal] void QCameraZoomControl:: requestedDigitalZoomChanged ( qreal zoom )

Signal emitted when the requested digital zoom value changed.

[pure virtual] qreal QCameraZoomControl:: requestedOpticalZoom () const

Return the requested optical zoom value.

[signal] void QCameraZoomControl:: requestedOpticalZoomChanged ( qreal zoom )

Signal emitted when the requested optical zoom value changed.

[pure virtual] void QCameraZoomControl:: zoomTo ( qreal optical , qreal digital )

集 optical and digital 缩放值。

Zooming can be asynchronous with value changes reported with currentDigitalZoomChanged () 和 currentOpticalZoomChanged () 信号。

The backend should expect and correctly handle frequent zoomTo() calls during zoom animations or slider movements.

宏文档编制

QCameraZoomControl_iid

org.qt-project.qt.camerazoomcontrol/5.0

定义接口名为 QCameraZoomControl 类。