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  • Hash : af0ab490
    Author : Sam Lantinga
    Date : 2014-02-22T14:57:12

    Fixed bug 2346 - Mac: mousewheel events have flipped horizontal scroll values Alex Szpakowski On my Mac OS X system (10.9.1), the SDL_MOUSEWHEEL event reports negative X values when my trackpad scrolls to the right, and positive X values when my trackpad scrolls to the left. This is backwards from what I'd expect, and I don't think it matches the Windows wheel events. The vertical scroll values are what I'd expect though, and are consistent what gets reported on Windows (positive Y for scrolling up, negative Y for scrolling down.) This is with "scroll direction: natural" disabled in the OS X trackpad settings (i.e. my scroll direction in non-SDL OS X programs matches what happens in Windows and Linux.) I also tested with the horizontal scroll on a real mouse (Logitech G500 without custom drivers), and the horizontal scroll values in SDL are still flipped. I "solved" the issue for myself by changing this line in the Cocoa_HandleMouseWheel function: float x = [event deltaX]; to this: float x = -[event deltaX]; I believe it should work fine with that change - I found something similar in another codebase while looking online for my issue - but I haven't tested on anything below Mac OS 10.8.

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  • README.txt

  •                          Simple DirectMedia Layer
    
                                      (SDL)
    
                                    Version 2.0
    
    ---
    http://www.libsdl.org/
    
    Simple DirectMedia Layer is a cross-platform development library designed
    to provide low level access to audio, keyboard, mouse, joystick, and graphics
    hardware via OpenGL and Direct3D. It is used by video playback software,
    emulators, and popular games including Valve's award winning catalog
    and many Humble Bundle games.
    
    SDL officially supports Windows, Mac OS X, Linux, iOS, and Android.
    Support for other platforms may be found in the source code.
    
    SDL is written in C, works natively with C++, and there are bindings 
    available for several other languages, including C# and Python.
    
    This library is distributed under the zlib license, which can be found
    in the file "COPYING.txt".
    
    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 and FAQs are available online at:
    	http://wiki.libsdl.org/
    
    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
    
    If you want to report bugs or contribute patches, please submit them to
    bugzilla:
        http://bugzilla.libsdl.org/
    
    Enjoy!
    	Sam Lantinga				(slouken@libsdl.org)