| | 1 | ///////////////////////////////////////////////////////////////////////////// |
| | 2 | // Name: wx/private/window.h |
| | 3 | // Purpose: misc wxWindow helpers |
| | 4 | // Author: Vaclav Slavik |
| | 5 | // Created: 2010-01-21 |
| | 6 | // RCS-ID: $Id$ |
| | 7 | // Copyright: (c) 2010 Vaclav Slavik |
| | 8 | // Licence: wxWindows licence |
| | 9 | ///////////////////////////////////////////////////////////////////////////// |
| | 10 | |
| | 11 | #ifndef _WX_PRIVATE_WINDOW_H_ |
| | 12 | #define _WX_PRIVATE_WINDOW_H_ |
| | 13 | |
| | 14 | #include "wx/gdicmn.h" |
| | 15 | |
| | 16 | namespace wxPrivate |
| | 17 | { |
| | 18 | |
| | 19 | // Windows' computes dialog units using average character width over upper- |
| | 20 | // and lower-case ASCII alphabet and not using the average character width |
| | 21 | // metadata stored in the font; see |
| | 22 | // http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion. |
| | 23 | // |
| | 24 | // This helper function computes font dimensions in the same way. It works with |
| | 25 | // either wxDC or wxWindow argument. |
| | 26 | template<typename T> |
| | 27 | inline wxSize GetAverageASCIILetterSize(const T& of_what) |
| | 28 | { |
| | 29 | const wxStringCharType *TEXT_TO_MEASURE = |
| | 30 | wxS("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"); |
| | 31 | |
| | 32 | wxSize s = of_what.GetTextExtent(TEXT_TO_MEASURE); |
| | 33 | s.x = (s.x / 26 + 1) / 2; |
| | 34 | return s; |
| | 35 | } |
| | 36 | |
| | 37 | } // namespace wxPrivate |
| | 38 | |
| | 39 | #endif // _WX_PRIVATE_WINDOW_H_ |
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