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Remove dynamic loading of SetLayeredWindowAttributes and FlashWindowEx.

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FlashWindowEx is available since WinXP.
SetLayeredWindowAttributes is available since Win2k.
This commit is contained in:
Tobias Taschner
2015-09-16 18:29:45 +02:00
parent bf0461bde7
commit 27ffe525b5
1 changed files with 16 additions and 56 deletions
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72
src/msw/toplevel.cpp
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@@ -1078,44 +1078,28 @@ bool wxTopLevelWindowMSW::EnableMinimizeButton(bool enable)
void wxTopLevelWindowMSW::RequestUserAttention(int flags)
{
#if defined(FLASHW_STOP) && wxUSE_DYNLIB_CLASS
// available in the headers, check if it is supported by the system
typedef BOOL (WINAPI *FlashWindowEx_t)(FLASHWINFO *pfwi);
static FlashWindowEx_t s_pfnFlashWindowEx = NULL;
if ( !s_pfnFlashWindowEx )
#if defined(FLASHW_STOP)
WinStruct<FLASHWINFO> fwi;
fwi.hwnd = GetHwnd();
fwi.dwFlags = FLASHW_ALL;
if ( flags & wxUSER_ATTENTION_INFO )
{
wxDynamicLibrary dllUser32(wxT("user32.dll"));
s_pfnFlashWindowEx = (FlashWindowEx_t)
dllUser32.GetSymbol(wxT("FlashWindowEx"));
// we can safely unload user32.dll here, it's going to remain loaded as
// long as the program is running anyhow
// just flash a few times
fwi.uCount = 3;
}
else // wxUSER_ATTENTION_ERROR
{
// flash until the user notices it
fwi.dwFlags |= FLASHW_TIMERNOFG;
}
if ( s_pfnFlashWindowEx )
{
WinStruct<FLASHWINFO> fwi;
fwi.hwnd = GetHwnd();
fwi.dwFlags = FLASHW_ALL;
if ( flags & wxUSER_ATTENTION_INFO )
{
// just flash a few times
fwi.uCount = 3;
}
else // wxUSER_ATTENTION_ERROR
{
// flash until the user notices it
fwi.dwFlags |= FLASHW_TIMERNOFG;
}
s_pfnFlashWindowEx(&fwi);
}
else // FlashWindowEx() not available
#endif // FlashWindowEx() defined
::FlashWindowEx(&fwi);
#else
{
wxUnusedVar(flags);
::FlashWindow(GetHwnd(), TRUE);
}
#endif // defined(FLASHW_STOP)
}
wxMenu *wxTopLevelWindowMSW::MSWGetSystemMenu() const
@@ -1157,28 +1141,6 @@ wxMenu *wxTopLevelWindowMSW::MSWGetSystemMenu() const
bool wxTopLevelWindowMSW::SetTransparent(wxByte alpha)
{
#if wxUSE_DYNLIB_CLASS
typedef DWORD (WINAPI *PSETLAYEREDWINDOWATTR)(HWND, DWORD, BYTE, DWORD);
static PSETLAYEREDWINDOWATTR
pSetLayeredWindowAttributes = (PSETLAYEREDWINDOWATTR)-1;
if ( pSetLayeredWindowAttributes == (PSETLAYEREDWINDOWATTR)-1 )
{
wxDynamicLibrary dllUser32(wxT("user32.dll"));
// use RawGetSymbol() and not GetSymbol() to avoid error messages under
// Windows 95: there is nothing the user can do about this anyhow
pSetLayeredWindowAttributes = (PSETLAYEREDWINDOWATTR)
dllUser32.RawGetSymbol(wxT("SetLayeredWindowAttributes"));
// it's ok to destroy dllUser32 here, we link statically to user32.dll
// anyhow so it won't be unloaded
}
if ( !pSetLayeredWindowAttributes )
return false;
#endif // wxUSE_DYNLIB_CLASS
LONG exstyle = GetWindowLong(GetHwnd(), GWL_EXSTYLE);
// if setting alpha to fully opaque then turn off the layered style
@@ -1189,14 +1151,12 @@ bool wxTopLevelWindowMSW::SetTransparent(wxByte alpha)
return true;
}
#if wxUSE_DYNLIB_CLASS
// Otherwise, set the layered style if needed and set the alpha value
if ((exstyle & WS_EX_LAYERED) == 0 )
SetWindowLong(GetHwnd(), GWL_EXSTYLE, exstyle | WS_EX_LAYERED);
if ( pSetLayeredWindowAttributes(GetHwnd(), 0, (BYTE)alpha, LWA_ALPHA) )
if ( ::SetLayeredWindowAttributes(GetHwnd(), 0, (BYTE)alpha, LWA_ALPHA) )
return true;
#endif // wxUSE_DYNLIB_CLASS
return false;
}