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From Rick Johnson: Here's the call pattern: Create the window hidden The game tells it to adjust the window position Make the window visible. A problem arises from the SetWindowsPos() - the default behavior of that would cause a WM_ACTIVATE message to be passed, of which SDL interprets that as the window now becoming visible and sets the flags. The window is not visible though. Now, when you try to call ShowWindow() - SDL sees those flags as indicating that the window is visible and early returns. My proposed fix was that if we are calling set windows position and we aren't visible, add on the flag SWP_NOACTIVATE, which tells windows to not send down the WM_ACTIVATE flag.
Simple DirectMedia Layer
(SDL)
Version 2.0
---
http://www.libsdl.org/
This is the Simple DirectMedia Layer, a general API that provides low
level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL,
and 2D framebuffer across multiple platforms.
The current version supports Windows, Windows CE, Mac OS X, Linux, FreeBSD,
NetBSD, OpenBSD, BSD/OS, Solaris, iOS, and Android. The code contains
support for other operating systems but those are not officially supported.
SDL is written in C, but works with C++ natively, and has bindings to
several other languages, including Ada, C#, Eiffel, Erlang, Euphoria,
Go, Guile, Haskell, Java, Lisp, Lua, ML, Objective C, Pascal, Perl, PHP,
Pike, Pliant, Python, Ruby, and Smalltalk.
This library is distributed under the zlib license, which can be found
in the file "COPYING".
The best way to learn how to use SDL is to check out the header files in
the "include" subdirectory and the programs in the "test" subdirectory.
The header files and test programs are well commented and always up to date.
More documentation is available in HTML format in "docs/index.html", and
a documentation wiki is available online at:
http://www.libsdl.org/cgi/docwiki.cgi
The test programs in the "test" subdirectory are in the public domain.
Frequently asked questions are answered online:
http://www.libsdl.org/faq.php
If you need help with the library, or just want to discuss SDL related
issues, you can join the developers mailing list:
http://www.libsdl.org/mailing-list.php
Enjoy!
Sam Lantinga (slouken@libsdl.org)