40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/private/window.h
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// Purpose: misc wxWindow helpers
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// Author: Vaclav Slavik
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// Created: 2010-01-21
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// RCS-ID: $Id$
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// Copyright: (c) 2010 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_PRIVATE_WINDOW_H_
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#define _WX_PRIVATE_WINDOW_H_
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#include "wx/gdicmn.h"
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namespace wxPrivate
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{
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// Windows' computes dialog units using average character width over upper-
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// and lower-case ASCII alphabet and not using the average character width
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// metadata stored in the font; see
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// http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion.
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//
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// This helper function computes font dimensions in the same way. It works with
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// either wxDC or wxWindow argument.
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template<typename T>
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inline wxSize GetAverageASCIILetterSize(const T& of_what)
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{
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const wxStringCharType *TEXT_TO_MEASURE =
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wxS("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
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wxSize s = of_what.GetTextExtent(TEXT_TO_MEASURE);
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s.x = (s.x / 26 + 1) / 2;
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return s;
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}
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} // namespace wxPrivate
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#endif // _WX_PRIVATE_WINDOW_H_
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