setting image to QLabel in new thread

[troorl]

Hi.
I'm extending QFileDialog with preview support. When user clicked on the graphic file, image must be set to the QLabel. I doing it in new thread because loading big images is slow sometimes.
QPixmap is not supported to creating in new threads. I'm loading file in QPicture:

QPicture *pic = new QPicture;
pic->load(file);

QPicture *pic = new QPicture;
pic->load(file);

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But it returned warning to console:

QPicturePaintEngine::checkFormat: Incorrect header

QPicturePaintEngine::checkFormat: Incorrect header

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and file is not loaded.
Can't anybody help me with this problem?

P.S. Sorry for my English.

[spirit]

you can try to load data from file in thread in QByteArray and then emit a signal which will return this QByteArray and then in GUI you can create QPIxmap.
if you need example I can show it.

[wysota]

Use QImage and not QPicture.