CameraFlash QML Type▲
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Import Statement: import QtMultimedia 5.12
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Group: CameraFlash is part of multimedia_qml, camera_qml
Detailed Description▲
This type allows you to operate the camera flash hardware and control the flash mode used. Not all cameras have flash hardware (and in some cases it is shared with the torch hardware).
It should not be constructed separately, instead the flash property of a Camera should be used.
Camera {
id: camera
exposure.exposureCompensation: -1.0
flash.mode: Camera.FlashRedEyeReduction
}Property Documentation▲
mode : enumeration▲
This property holds the camera flash mode.
The mode can be one of the following:
|
Value |
Description |
|---|---|
|
Camera.FlashOff |
Flash is Off. |
|
Camera.FlashOn |
Flash is On. |
|
Camera.FlashAuto |
Automatic flash. |
|
Camera.FlashRedEyeReduction |
Red eye reduction flash. |
|
Camera.FlashFill |
Use flash to fillin shadows. |
|
Camera.FlashTorch |
Constant light source. If supported, torch can be enabled without loading the camera. |
|
Camera.FlashVideoLight |
Constant light source, useful for video capture. The light is turned on only while the camera is active. |
|
Camera.FlashSlowSyncFrontCurtain |
Use the flash in conjunction with a slow shutter speed. This mode allows better exposure of distant objects and/or motion blur effect. |
|
Camera.FlashSlowSyncRearCurtain |
The similar mode to FlashSlowSyncFrontCurtain but flash is fired at the end of exposure. |
|
Camera.FlashManual |
Flash power is manually set. |
[read-only] ready : bool▲
This property indicates whether the flash is charged.
[read-only, since 5.9] supportedModes : list<FlashMode>▲
This property holds the supported flash modes of the camera. If the list only contains Camera.FlashOff, no flash is supported.
Camera {
id: camera
flash {
onSupportedModesChanged {
if (flash.supportedModes.length == 1) {
// no flash supported
} else {
// some flash is supported
}
}
}
}This property was introduced in Qt 5.9.
See Also▲
See also mode
Signal Documentation▲
flashModeChanged(int)▲
This signal is emitted when the flashMode property is changed. The corresponding handler is onFlashModeChanged.
The corresponding handler is onFlashModeChanged.
flashReady(bool)▲
This signal is emitted when QCameraExposure indicates that the flash is ready to use. The corresponding handler is onFlashReadyChanged.
The corresponding handler is onFlashReady.