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    Question the invert of a QTransform's transposed

    I am trying to save the QGraphicsitem's information in the svg format. I meet a problem about QTransform's invert.
    I transpose a QTransform of QTransform::TxTranslate and invert it. But the result is not correct! I donot know why.
    I upload the source code. Will somebody run the code and give me some hint.
    Attached Files Attached Files
    Last edited by calmspeaker; 13th January 2011 at 05:45.
    Jerry

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