[Solved]The meaning of the "preview" parameter from the example "declarative-camera"
photoPreview.source = preview //where are this parameter(preview) come from?
stillControls.previewAvailable = true
cameraUI.state = "PhotoPreview"
File "declarative-camera.qml", line 91
These are part of the codes from the Qt5 example ""declarative-camera"
Can't find the source of this parameter, where is it come from?
The preview should be the image the camera captured
Because of signature is
so the preview is the parameter of the signal