              
QCameraExposure Class ReferenceThe QCameraExposure class provides interface for exposure related camera settings. More... #include <QCameraExposure>Inherits: QObject. This class was introduced in Qt Mobility 1.1. Public Types
Properties
Public Functions
Public Slots
Signals
Additional Inherited Members
Detailed DescriptionThe QCameraExposure class provides interface for exposure related camera settings. Member Type Documentation
|
| Constant | Value | Description |
|---|---|---|
| QCameraExposure::ExposureManual | 1 | Manual mode. |
| QCameraExposure::ExposureAuto | 0 | Automatic mode. |
| QCameraExposure::ExposureNight | 3 | Night mode. |
| QCameraExposure::ExposureBacklight | 4 | Backlight exposure mode. |
| QCameraExposure::ExposureSpotlight | 5 | Spotlight exposure mode. |
| QCameraExposure::ExposureSports | 6 | Spots exposure mode. |
| QCameraExposure::ExposureSnow | 7 | Snow exposure mode. |
| QCameraExposure::ExposureBeach | 8 | Beach exposure mode. |
| QCameraExposure::ExposureLargeAperture | 9 | Use larger aperture with small depth of field. |
| QCameraExposure::ExposureSmallAperture | 10 | Use smaller aperture. |
| QCameraExposure::ExposurePortrait | 2 | Portrait exposure mode. |
| QCameraExposure::ExposureModeVendor | 1000 | The base value for device specific exposure modes. |
enum QCameraExposure::FlashMode
flags QCameraExposure::FlashModes
flags QCameraExposure::FlashModes
| Constant | Value | Description |
|---|---|---|
| QCameraExposure::FlashOff | 0x2 | Flash is Off. |
| QCameraExposure::FlashOn | 0x4 | Flash is On. |
| QCameraExposure::FlashAuto | 0x1 | Automatic flash. |
| QCameraExposure::FlashRedEyeReduction | 0x8 | Red eye reduction flash. |
| QCameraExposure::FlashFill | 0x10 | Use flash to fillin shadows. |
| QCameraExposure::FlashTorch | 0x20 | Constant light source, useful for focusing and video capture. |
| QCameraExposure::FlashSlowSyncFrontCurtain | 0x40 | Use the flash in conjunction with a slow shutter speed. This mode allows better exposure of distant objects and/or motion blur effect. |
| QCameraExposure::FlashSlowSyncRearCurtain | 0x80 | The similar mode to FlashSlowSyncFrontCurtain but flash is fired at the end of exposure. |
| QCameraExposure::FlashManual | 0x100 | Flash power is manualy set. |
The FlashModes type is a typedef for QFlags<FlashMode>. It stores an OR combination of FlashMode values.
enum QCameraExposure::MeteringMode
| Constant | Value | Description |
|---|---|---|
| QCameraExposure::MeteringAverage | 2 | Center weighted average metering mode. |
| QCameraExposure::MeteringSpot | 3 | Spot metering mode. |
| QCameraExposure::MeteringMatrix | 1 | Matrix metering mode. |
Property Documentation
aperture : const qreal
This property holds lens aperture is specified as an F number, the ratio of the focal length to effective aperture diameter.
This property was introduced in Qt Mobility 1.1.
Access functions:
| qreal | aperture () const |
Notifier signal:
| void | apertureChanged ( qreal value ) |
See also supportedApertures(), setAutoAperture(), and setManualAperture().
exposureCompensation : qreal
This property holds exposure compensation in EV units.
Exposure compensation property allows to adjust the automatically calculated exposure.
This property was introduced in Qt Mobility 1.1.
Access functions:
| qreal | exposureCompensation () const |
| void | setExposureCompensation ( qreal ev ) |
Notifier signal:
| void | exposureCompensationChanged ( qreal value ) |
exposureMode : QCameraExposure::ExposureMode
This property holds the exposure mode being used.
This property was introduced in Qt Mobility 1.1.
Access functions:
| ExposureMode | exposureMode () const |
| void | setExposureMode ( ExposureMode mode ) |
See also QCameraExposure::isExposureModeSupported().
flashMode : QCameraExposure::FlashModes
This property holds the flash mode being used.
Usually the single QCameraExposure::FlashMode flag is used, but some non conflicting flags combination are also allowed, like QCameraExposure::FlashManual | QCameraExposure::FlashSlowSyncRearCurtain.
This property was introduced in Qt Mobility 1.1.
Access functions:
| FlashModes | flashMode () const |
| void | setFlashMode ( FlashModes mode ) |
See also QCameraExposure::isFlashModeSupported() and QCameraExposure::isFlashReady().
flashReady : const bool
This property holds indicates if the flash is charged and ready to use.
This property was introduced in Qt Mobility 1.1.
Access functions:
| bool | isFlashReady () const |
Notifier signal:
| void | flashReady ( bool ready ) |
isoSensitivity : const int
This property holds the sensor ISO sensitivity.
This property was introduced in Qt Mobility 1.1.
Access functions:
| int | isoSensitivity () const |
Notifier signal:
| void | isoSensitivityChanged ( int value ) |
See also supportedIsoSensitivities(), setAutoIsoSensitivity(), and setManualIsoSensitivity().
meteringMode : QCameraExposure::MeteringMode
This property holds the metering mode being used.
This property was introduced in Qt Mobility 1.1.
Access functions:
| MeteringMode | meteringMode () const |
| void | setMeteringMode ( MeteringMode mode ) |
See also QCameraExposure::isMeteringModeSupported().
shutterSpeed : const qreal
This property holds camera's shutter speed in seconds.
This property was introduced in Qt Mobility 1.1.
Access functions:
| qreal | shutterSpeed () const |
Notifier signal:
| void | shutterSpeedChanged ( qreal speed ) |
See also supportedShutterSpeeds(), setAutoShutterSpeed(), and setManualShutterSpeed().
Member Function Documentation
void QCameraExposure::apertureChanged ( qreal value ) [signal]
Signal emitted when aperature changes to value.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::apertureRangeChanged () [signal]
Signal emitted when aperature range has changed.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::exposureCompensationChanged ( qreal value ) [signal]
Signal emitted when the exposure compensation changes to value.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::flashReady ( bool ready ) [signal]
Signal the flash ready status has changed.
This function was introduced in Qt Mobility 1.1.
bool QCameraExposure::isAvailable () const
Returns true if exposure settings are supported by this camera.
This function was introduced in Qt Mobility 1.1.
bool QCameraExposure::isExposureModeSupported ( ExposureMode mode ) const
Returns true if the exposure mode is supported.
This function was introduced in Qt Mobility 1.1.
bool QCameraExposure::isFlashModeSupported ( FlashModes mode ) const
Returns true if the flash mode is supported.
This function was introduced in Qt Mobility 1.1.
bool QCameraExposure::isMeteringModeSupported ( MeteringMode mode ) const
Returns true if the metering mode is supported.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::isoSensitivityChanged ( int value ) [signal]
Signal emitted when sensitivity changes to value.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::setAutoAperture () [slot]
Turn on auto aperture
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::setAutoIsoSensitivity () [slot]
Turn on auto sensitivity
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::setAutoShutterSpeed () [slot]
Turn on auto shutter speed
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::setManualAperture ( qreal aperture ) [slot]
Sets the manual camera aperture value.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::setManualIsoSensitivity ( int iso ) [slot]
Sets the manual sensitivity to iso
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::setManualShutterSpeed ( qreal seconds ) [slot]
Set the manual shutter speed to seconds
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::shutterSpeedChanged ( qreal speed ) [signal]
Signals that a camera's shutter speed has changed.
This function was introduced in Qt Mobility 1.1.
void QCameraExposure::shutterSpeedRangeChanged () [signal]
Signal emitted when the shutter speed range has changed.
This function was introduced in Qt Mobility 1.1.
QList<qreal> QCameraExposure::supportedApertures ( bool * continuous = 0 ) const
Returns the list of aperture values camera supports. The apertures list can change depending on the focal length, in such a case the apertureRangeChanged() signal is emitted.
If the camera supports arbitrary aperture values within the supported range, *continuous is set to true, otherwise *continuous is set to false.
This function was introduced in Qt Mobility 1.1.
QList<int> QCameraExposure::supportedIsoSensitivities ( bool * continuous = 0 ) const
Returns the list of ISO senitivities camera supports.
If the camera supports arbitrary ISO sensitivities within the supported range, *continuous is set to true, otherwise *continuous is set to false.
This function was introduced in Qt Mobility 1.1.
QList<qreal> QCameraExposure::supportedShutterSpeeds ( bool * continuous = 0 ) const
Returns the list of shutter speed values in seconds camera supports.
If the camera supports arbitrary shutter speed values within the supported range, *continuous is set to true, otherwise *continuous is set to false.
This function was introduced in Qt Mobility 1.1.
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