QCameraZoomControl Class
The QCameraZoomControl class supplies control for optical and digital camera zoom. 更多...
| 头文件: | #include <QCameraZoomControl> |
| qmake: | QT += multimedia |
| 基类: | QMediaControl |
公有函数
| ~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 |
- 32 个公有函数继承自 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 个信号继承自 QObject
受保护的函数
| QCameraZoomControl(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 QCameraZoomControl class supplies control for optical and digital camera zoom.
The interface name of QCameraZoomControl is org.qt-project.qt.camerazoomcontrol/5.0 as defined in QCameraZoomControl_iid.
参见 QMediaService::requestControl() and QCamera.
成员函数
[protected] QCameraZoomControl::QCameraZoomControl(QObject *parent = Q_NULLPTR)
Constructs a camera zoom control object with parent.
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)
Sets optical and digital zoom values.
Zooming can be asynchronous with value changes reported with currentDigitalZoomChanged() and currentOpticalZoomChanged() signals.
The backend should expect and correctly handle frequent zoomTo() calls during zoom animations or slider movements.
宏
QCameraZoomControl_iid
org.qt-project.qt.camerazoomcontrol/5.0
Defines the interface name of the QCameraZoomControl class.