Saving image to QSettings from QML

[A Former User]

I'm using QSettings for storing user settings locally. QSettings are exposed to QML via wrapper:
http://developer.qt.nokia.com/forums/viewthread/11696/

QSettings support QImage as an argument for saving setting. How I can save image to QSettings from QML? Providing Image element returns me error:

QVariant::save: unable to save type 136.

[andre]

-QSettings does not support saving images.- Could you get away with just saving an image name instead, and save the image itself separately?

Edit: I stand corrected. QSettings docs states that it does support QImages.

[A Former User]

The API docs state different:

bq. QSettings's API is based on QVariant, allowing you to save most value-based types, such as QString, QRect, and QImage, with the minimum of effort.

I never tried it myself, though. It may be a restriction of the QML stuff?

[A Former User]

Yes, I basically wonder if it is possible to construct QImage from QML and save it to QSettings?

[andre]

I don't think you can do that from QML, as QML does not allows you access to the underlying QImage, AFAIK.

[A Former User]

Doing some experiments by capturing image with Camera and trying to save it into Settings.

@Camera {
id: camera
x: 0
y: 0
anchors.fill: parent
focus: visible //to receive focus and capture key events
captureResolution : "640x480"

        flashMode: Camera.FlashAuto
        whiteBalanceMode: Camera.WhiteBalanceAuto

        onImageCaptured : {
            captureButton.text = "Captured"
            image1.source = preview
            text1.text = preview
            Settings.setValue("image", preview)
        }@

Getting this:

[Qt Message] QVariant::load: unable to load type 136.
[Qt Message] QVariant::save: unable to save type 136.

I guess I have to implement some sort of image handler in C++ side for saving captured images.

[A Former User]

How about if I need to create QImage from QML Image element? Same thing like discussed here but backwards? I'm currently capturing image with QML Camera, and would like to save it somehow.

[andre]

[quote author="strekazoid" date="1321969152"]How about if I need to create QImage from QML Image element? Same thing like discussed here but backwards? I'm currently capturing image with QML Camera, and would like to save it somehow.[/quote]

I have moved the message above from "this old topic":http://developer.qt.nokia.com/forums/viewthread/11832/ to here. Strekazoid, please confine the discussion of your issue to a single topic. You already have multiple topics open on different aspects of this same issue. Posting in even more topics, even if they are related, doesn't help.

[A Former User]

bq. Posting in even more topics, even if they are related, doesn’t help.

Agree :D

[A Former User]

Have you tried QDataStream to save the image ?