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QCameraExposureControl Class ReferenceThe QCameraExposureControl class supplies control for exposure related camera parameters. More... #include <QCameraExposureControl> Inherits QMediaControl. Public Types
Public Functions
Signals
Protected Functions
Macros
Additional Inherited Members
Detailed DescriptionThe QCameraExposureControl class supplies control for exposure related camera parameters. The interface name of QCameraExposureControl is com.nokia.Qt.QCameraExposureControl/1.0 as defined in QCameraExposureControl_iid. See also QCamera. Member Type Documentation
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| Constant | Value | Description |
|---|---|---|
| QCameraExposureControl::InvalidParameter | 0 | Parameter is invalid. |
| QCameraExposureControl::ISO | 1 | Camera ISO sensitivity, specified as integer value. |
| QCameraExposureControl::Aperture | 2 | Lens aperture is specified as an qreal F number. The supported apertures list can change depending on the focal length, in such a case the exposureParameterRangeChanged() signal is emitted. |
| QCameraExposureControl::ShutterSpeed | 3 | Shutter speed in seconds, specified as qreal. |
| QCameraExposureControl::ExposureCompensation | 4 | Exposure compensation, specified as qreal EV value. |
| QCameraExposureControl::FlashPower | 5 | Manual flash power, specified as qreal value. Accepted power range is [0..1.0], with 0 value means no flash and 1.0 corresponds to full flash power. |
This value is only used in the manual flash mode.
| Constant | Value | Description |
|---|---|---|
| QCameraExposureControl::FlashCompensation | 6 | Flash compensation, specified as qreal EV value. |
| QCameraExposureControl::ExtendedExposureParameter | 1000 | The base value for platform specific extended parameters. For such parameters the sequential values starting from ExtendedExposureParameter shuld be used. |
enum QCameraExposureControl::ParameterFlag
flags QCameraExposureControl::ParameterFlags
flags QCameraExposureControl::ParameterFlags
| Constant | Value | Description |
|---|---|---|
| QCameraExposureControl::AutomaticValue | 0x01 | Use the automatic values for parameters. |
| QCameraExposureControl::ReadOnly | 0x02 | Parameters are read only. |
| QCameraExposureControl::ContinuousRange | 0x04 | Parameters are continuous in their range. |
The ParameterFlags type is a typedef for QFlags<ParameterFlag>. It stores an OR combination of ParameterFlag values.
Member Function Documentation
QCameraExposureControl::QCameraExposureControl ( QObject * parent = 0 ) [protected]
Constructs a camera exposure control object with parent.
QCameraExposureControl::~QCameraExposureControl ()
Destruct the camera control object.
QCameraExposure::ExposureMode QCameraExposureControl::exposureMode () const [pure virtual]
Returns the exposure mode.
See also setExposureMode().
QVariant QCameraExposureControl::exposureParameter ( ExposureParameter parameter ) const [pure virtual]
Returns the exposure parameter value, or invalid QVariant() if the value is unknown or not supported.
See also setExposureParameter().
void QCameraExposureControl::exposureParameterChanged ( int parameter ) [signal]
Signal emitted when the exposure parameter has changed.
ParameterFlags QCameraExposureControl::exposureParameterFlags ( ExposureParameter parameter ) const [pure virtual]
Returns the properties of exposure parameter.
void QCameraExposureControl::exposureParameterRangeChanged ( int parameter ) [signal]
Signal emitted when the exposure parameter range has changed.
QString QCameraExposureControl::extendedParameterName ( ExposureParameter parameter ) [pure virtual]
Returns the extended exposure parameter name.
void QCameraExposureControl::flashReady ( bool ready ) [signal]
Signal emitted when flash state changes, flash is charged ready.
bool QCameraExposureControl::isExposureModeSupported ( QCameraExposure::ExposureMode mode ) const [pure virtual]
Returns true if the exposure mode is supported.
bool QCameraExposureControl::isMeteringModeSupported ( QCameraExposure::MeteringMode mode ) const [pure virtual]
Returns true if the metering mode is supported.
bool QCameraExposureControl::isParameterSupported ( ExposureParameter parameter ) const [pure virtual]
Returns true is exposure parameter is supported by backend.
QCameraExposure::MeteringMode QCameraExposureControl::meteringMode () const [pure virtual]
Returns the current metering mode.
See also setMeteringMode().
void QCameraExposureControl::setExposureMode ( QCameraExposure::ExposureMode mode ) [pure virtual]
Set the exposure mode to mode.
See also exposureMode().
bool QCameraExposureControl::setExposureParameter ( ExposureParameter parameter, const QVariant & value ) [pure virtual]
Set the exposure parameter to value. If a null or invalid QVariant is passed, backend should choose the value automatically, and if possible report the actual value to user with QCameraExposureControl::exposureParameter().
Returns true if parameter is supported and value is correct.
See also exposureParameter().
void QCameraExposureControl::setMeteringMode ( QCameraExposure::MeteringMode mode ) [pure virtual]
Set the metering mode to mode.
See also meteringMode().
QVariantList QCameraExposureControl::supportedParameterRange ( ExposureParameter parameter ) const [pure virtual]
Returns the list of supported parameter values;
Macro Documentation
QCameraExposureControl_iid
com.nokia.Qt.QCameraExposureControl/1.0
Defines the interface name of the QCameraExposureControl class.