The QCameraZoomControl class supplies control for optical and digital camera zoom. 更多...
| 头： | #include <QCameraZoomControl> |
| qmake: | QT += multimedia |
| 继承： | QMediaControl |
该类已过时。 提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。
| 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 |
| void | currentDigitalZoomChanged (qreal zoom ) |
| void | currentOpticalZoomChanged (qreal zoom ) |
| void | maximumDigitalZoomChanged (qreal zoom ) |
| void | maximumOpticalZoomChanged (qreal zoom ) |
| void | requestedDigitalZoomChanged (qreal zoom ) |
| void | requestedOpticalZoomChanged (qreal zoom ) |
| QCameraZoomControl (QObject * parent = nullptr) |
| QCameraZoomControl_iid |
The interface name of QCameraZoomControl is
org.qt-project.qt.camerazoomcontrol/5.0
作为定义在
QCameraZoomControl_iid
.
另请参阅 QMediaService::requestControl () 和 QCamera .
[protected]
QCameraZoomControl::
QCameraZoomControl
(
QObject
*
parent
= nullptr)
Constructs a camera zoom control object with parent .
[signal]
void
QCameraZoomControl::
currentDigitalZoomChanged
(
qreal
zoom
)
Signal emitted when the current digital zoom value changed.
[signal]
void
QCameraZoomControl::
currentOpticalZoomChanged
(
qreal
zoom
)
Signal emitted when the current optical zoom value changed.
[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.
[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.
[signal]
void
QCameraZoomControl::
requestedDigitalZoomChanged
(
qreal
zoom
)
Signal emitted when the requested digital zoom value changed.
[signal]
void
QCameraZoomControl::
requestedOpticalZoomChanged
(
qreal
zoom
)
Signal emitted when the requested optical zoom value changed.
[虚拟]
QCameraZoomControl::
~QCameraZoomControl
()
Destruct the camera zoom control object.
[pure virtual]
qreal
QCameraZoomControl::
currentDigitalZoom
() const
Return the current digital zoom value.
[pure virtual]
qreal
QCameraZoomControl::
currentOpticalZoom
() const
Return the current optical zoom value.
[pure virtual]
qreal
QCameraZoomControl::
maximumDigitalZoom
() const
Returns the maximum digital zoom value, or 1.0 if digital zoom is not supported.
[pure virtual]
qreal
QCameraZoomControl::
maximumOpticalZoom
() const
Returns the maximum optical zoom value, or 1.0 if optical zoom is not supported.
[pure virtual]
qreal
QCameraZoomControl::
requestedDigitalZoom
() const
Return the requested digital zoom value.
[pure virtual]
qreal
QCameraZoomControl::
requestedOpticalZoom
() const
Return the requested optical zoom value.
[pure virtual]
void
QCameraZoomControl::
zoomTo
(
qreal
optical
,
qreal
digital
)
设置 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.
org.qt-project.qt.camerazoomcontrol/5.0
定义接口名为 QCameraZoomControl 类。