CameraFlash QML Type

An interface for flash related camera settings. 更多...

import 语句：

import QtMultimedia 5.15

所有成员列表，包括继承成员

特性

mode : enumeration
ready : bool
supportedModes : list<FlashMode>

信号

flashModeChanged ()
flashReady ()

详细描述

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
}

特性文档编制

mode : enumeration

This property holds the camera flash mode.

The mode can be one of the following:

值	描述
Camera.FlashOff	Flash is Off.
Camera.FlashOn	Flash is On.
Camera.FlashAuto	自动闪光。
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.

ready : bool

This property indicates whether the flash is charged.

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
            }
        }
    }
}

该特性在 Qt 5.9 引入。

另请参阅 mode .

信号文档编制

flashModeChanged ()

此信号发射当 flashMode property is changed. The corresponding handler is onFlashModeChanged .

注意： 相应处理程序是 onFlashModeChanged .

flashReady ()

此信号发射当 QCameraExposure indicates that the flash is ready to use. The corresponding handler is onFlashReadyChanged .

注意： 相应处理程序是 onFlashReady .