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Re: keeping fixed x/y ratio in a control [message #8143 is a reply to message #8142]

Mon, 12 February 2007 19:50

exolon
Messages: 62
Registered: July 2006
Location: 53'21N 6'18W

Member

Well, this seems to work, but (as almost always with my GUI code) it seems a bit unnecessarily dirty.

Does anyone know a nicer, simpler way of achieving this?

The code sets cx = cy = min(cx, cy), then centres the drawing (graph) in the Ctrl.

virtual void Paint(Draw& w) {
    Ctrl::Paint(w);

    // scale/clip drawing to fit control on a x/y = 1 ratio
    Size paneSize = GetSize();
    int cx = paneSize.cx;
    int cy = paneSize.cy;
    if(cx < cy)
        cy = cx;
    else
        cx = cy;

    w.DrawRect(GetSize(), WhiteGray());
    w.DrawDrawing((paneSize.cx - cx)/2, (paneSize.cy - cy)/2, cx, cy, graph);
}

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