49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// Name: wx/msw/private/metrics.h
|
||
|
|
// Purpose: various helper functions to retrieve system metrics
|
||
|
|
// Author: Vadim Zeitlin
|
||
|
|
// Created: 2008-09-05
|
||
|
|
// Copyright: (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
|
||
|
|
// Licence: wxWindows licence
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
#ifndef _WX_MSW_PRIVATE_METRICS_H_
|
||
|
|
#define _WX_MSW_PRIVATE_METRICS_H_
|
||
|
|
|
||
|
|
namespace wxMSWImpl
|
||
|
|
{
|
||
|
|
|
||
|
|
// return NONCLIENTMETRICS as retrieved by SystemParametersInfo()
|
||
|
|
//
|
||
|
|
// currently this is not cached as the values may change when system settings
|
||
|
|
// do and we don't react to this to invalidate the cache but it could be done
|
||
|
|
// in the future
|
||
|
|
//
|
||
|
|
// MT-safety: this function is only meant to be called from the main thread
|
||
|
|
inline const NONCLIENTMETRICS& GetNonClientMetrics()
|
||
|
|
{
|
||
|
|
static WinStruct<NONCLIENTMETRICS> nm;
|
||
|
|
if ( !::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0) )
|
||
|
|
{
|
||
|
|
#if WINVER >= 0x0600
|
||
|
|
// a new field has been added to NONCLIENTMETRICS under Vista, so
|
||
|
|
// the call to SystemParametersInfo() fails if we use the struct
|
||
|
|
// size incorporating this new value on an older system -- retry
|
||
|
|
// without it
|
||
|
|
nm.cbSize -= sizeof(int);
|
||
|
|
if ( !::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0) )
|
||
|
|
#endif // WINVER >= 0x0600
|
||
|
|
{
|
||
|
|
// maybe we should initialize the struct with some defaults?
|
||
|
|
wxLogLastError(wxT("SystemParametersInfo(SPI_GETNONCLIENTMETRICS)"));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nm;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace wxMSWImpl
|
||
|
|
|
||
|
|
#endif // _WX_MSW_PRIVATE_METRICS_H_
|
||
|
|
|