projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| e328b972 VZ |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wx/msw/private/metrics.h | |
| 3 | // Purpose: various helper functions to retrieve system metrics | |
| 4 | // Author: Vadim Zeitlin | |
| 5 | // Created: 2008-09-05 | |
| e328b972 VZ |
6 | // Copyright: (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org> |
| 7 | // Licence: wxWindows licence | |
| 8 | /////////////////////////////////////////////////////////////////////////////// | |
| 9 | ||
| 10 | #ifndef _WX_MSW_PRIVATE_METRICS_H_ | |
| 11 | #define _WX_MSW_PRIVATE_METRICS_H_ | |
| 12 | ||
| 13 | namespace wxMSWImpl | |
| 14 | { | |
| 15 | ||
| 16 | // return NONCLIENTMETRICS as retrieved by SystemParametersInfo() | |
| 17 | // | |
| 18 | // currently this is not cached as the values may change when system settings | |
| 19 | // do and we don't react to this to invalidate the cache but it could be done | |
| 20 | // in the future | |
| 21 | // | |
| 22 | // MT-safety: this function is only meant to be called from the main thread | |
| 23 | inline const NONCLIENTMETRICS& GetNonClientMetrics() | |
| 24 | { | |
| 25 | static WinStruct<NONCLIENTMETRICS> nm; | |
| 26 | if ( !::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0) ) | |
| 27 | { | |
| 28 | #if WINVER >= 0x0600 | |
| 29 | // a new field has been added to NONCLIENTMETRICS under Vista, so | |
| 30 | // the call to SystemParametersInfo() fails if we use the struct | |
| 31 | // size incorporating this new value on an older system -- retry | |
| 32 | // without it | |
| 33 | nm.cbSize -= sizeof(int); | |
| 34 | if ( !::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0) ) | |
| 35 | #endif // WINVER >= 0x0600 | |
| 36 | { | |
| 37 | // maybe we should initialize the struct with some defaults? | |
| 9a83f860 | 38 | wxLogLastError(wxT("SystemParametersInfo(SPI_GETNONCLIENTMETRICS)")); |
| e328b972 VZ |
39 | } |
| 40 | } | |
| 41 | ||
| 42 | return nm; | |
| 43 | } | |
| 44 | ||
| 45 | } // namespace wxMSWImpl | |
| 46 | ||
| 47 | #endif // _WX_MSW_PRIVATE_METRICS_H_ | |
| 48 |