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Resolve warning popup when GetDpiForWindow() is not available

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The GetDpiForWindow() Win32 API was introduced in User32.dll with
Windows 10. Since we have a fallback case when this API is not present,
avoid popping up the wxWidgets warning. Furthermore, performance was
improved by introducing a flag to prevent keep looking for
GetDpiForWindow() on each call.
This commit is contained in:
Simon Rozman 2018-09-19 12:58:51 +02:00
parent 45e847702e
commit a798474bdc
1 changed files with 6 additions and 3 deletions
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9
include/wxex/private/tlwgeom.h
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@ -289,10 +289,13 @@ private:
wxASSERT(dpiVert); wxASSERT(dpiVert);
#if wxUSE_DYNLIB_CLASS #if wxUSE_DYNLIB_CLASS
typedef HRESULT(WINAPI *GetDpiForWindow_t)(HWND); typedef UINT(WINAPI *GetDpiForWindow_t)(HWND);
static bool s_checkedGetDpiForWindow = false;
static GetDpiForWindow_t s_pfnGetDpiForWindow = NULL; static GetDpiForWindow_t s_pfnGetDpiForWindow = NULL;
if (!s_pfnGetDpiForWindow && s_dllUser32.IsLoaded()) if (!s_checkedGetDpiForWindow && s_dllUser32.IsLoaded()) {
s_pfnGetDpiForWindow = (GetDpiForWindow_t)s_dllUser32.GetSymbol(wxT("GetDpiForWindow")); s_pfnGetDpiForWindow = (GetDpiForWindow_t)s_dllUser32.RawGetSymbol(wxT("GetDpiForWindow"));
s_checkedGetDpiForWindow = true;
}
if (s_pfnGetDpiForWindow) { if (s_pfnGetDpiForWindow) {
*dpiHorz = *dpiVert = s_pfnGetDpiForWindow(hWnd); *dpiHorz = *dpiVert = s_pfnGetDpiForWindow(hWnd);