Qt-interest Archive, February 2007
Windows/Qt conflicts
Message 1 in thread
Hi All,
I am exploring QT on windows.
Came across the the qwindowsdefs_win.h.
This typedes stuff like HINSTANCE, HFONT etc.
Just wondering why does it not conflict with same typedefs in windef.h
of windows SDK ?
Any ideas ?
Thnx
Prateek
Message 2 in thread
Hi,
> I am exploring QT on windows.
> Came across the the qwindowsdefs_win.h.
> This typedes stuff like HINSTANCE, HFONT etc.
> Just wondering why does it not conflict with same typedefs in
> windef.h of windows SDK ?
They're re-defined only if they're not already defined (to work around
broken SDKs I guess).
--
[ signature omitted ]
Message 3 in thread
I dont think so.
Look at the following snippets :-
qwindowdefs.h:
#if defined(Q_WS_WIN)
#include <QtGui/qwindowdefs_win.h>
#endif // Q_WS_WIN
qglobal.h:
#elif !defined(SAG_COM) && (defined(WIN32) || defined(_WIN32) ||
defined(__WIN32__) || defined(__NT__))
# define Q_OS_WIN32
and
#if defined(Q_WS_WIN16) || defined(Q_WS_WIN32)
# define Q_WS_WIN
#endif
Here WIN32 is defined at command line for windows projects so
qwindowdefs_win.h would be included always.
I think normally for a QT project one would not include <windows.h>.
But if one uses the QT/MFC migration framework, <windows.h> is also
included in the demo application.
Including <windows.h> includes <windef.h> which should result in
conflicting typedefs.
But I dont see any error :-(
Pl help me understand this.
Thnx
Prateek
-----Original Message-----
From: Dimitri [mailto:dimitri@xxxxxxxxxxxxx]
Sent: Monday, February 19, 2007 2:54 AM
To: qt-interest@xxxxxxxxxxxxx
Subject: Re: Windows/Qt conflicts
Hi,
> I am exploring QT on windows.
> Came across the the qwindowsdefs_win.h.
> This typedes stuff like HINSTANCE, HFONT etc.
> Just wondering why does it not conflict with same typedefs in windef.h
> of windows SDK ?
They're re-defined only if they're not already defined (to work around
broken SDKs I guess).
--
[ signature omitted ]
Message 4 in thread
Hi,
> Including <windows.h> includes <windef.h> which should result in
> conflicting typedefs.
Indeed <qwindowsdefs_win.h> is included, however HINSTANCE, HFONT etc.
are re-defined only if they're not already defined.
--
[ signature omitted ]
