Saving image to QSettings from QML

strekazoid

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.

goetz

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?

strekazoid

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.

strekazoid

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.

strekazoid

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.

strekazoid

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

Agree :D

KA51O

Have you tried QDataStream to save the image ?