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http://www.perlmonks.org/?node_id=975036, which does not show a working solution, suggests this can be done by writing and updating a temp file and using a timeout to periodically clear and reload the image from there. Leaving aside the feeling that a temp file is a kludge, where does this timeout go? In or outside the main loop?

In reply to Re^3: gtk2-perl: how to update image widget from callback? by wdef2
in thread gtk2-perl: how to update image widget from callback? by wdef2

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