Function assignFrom

dgl/src/ImageBaseWidgets.cpp:275–288

    }

    void assignFrom(PrivateData* const other)
    {
        cleanup();
        image          = other->image;
        rotationAngle  = other->rotationAngle;
        callback       = other->callback;
        alwaysRepaint  = other->alwaysRepaint;
        isImgVertical  = other->isImgVertical;
        imgLayerWidth  = other->imgLayerWidth;
        imgLayerHeight = other->imgLayerHeight;
        imgLayerCount  = other->imgLayerCount;
        isReady        = false;
        init();
    }

    ~PrivateData()
    {