[Ohrrpgce] SVN: teeemcee/8621 gfx_sdl: Add mouse wheel up/down as mouse buttons.

[Ralph Versteegen]

On 9 April 2017 at 11:12, <subversion at hamsterrepublic.com> wrote:

> teeemcee
> 2017-04-08 16:12:25 -0700 (Sat, 08 Apr 2017)
> 222
> gfx_sdl: Add mouse wheel up/down as mouse buttons.
>
> Also allow checking these buttons using "mouse button" and "mouse click",
> but it's undocumented, because other backends don't support it yet.
> Added a test to collider.rpg
> ---
> U   wip/gfx_sdl.bas
> U   wip/scancodes.bi
> U   wip/scriptcommands.bas
> U   wip/testgame/collider.hss
> U   wip/testgame/collider.rpg
>

Wait, this isn't right. In fact, gfx_sdl was the only backend that didn't
support the mouse wheel! All other backends return the amount it moved, so
I'll change gfx_sdl to do the same. Then allmodex can translate that into
up/down button presses for people who want that.
And anyway, SDL 2 no longer reports the mouse wheel as a pair of buttons
like SDL 1.2. Instead it reports the amount the wheel moved.
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