SCUMM: Add mousewheel support to the inventory

[raziel-]

ScummVM 2.1.0git (May 29 2018 08:17:19)
Features compiled in: Vorbis FLAC MP3 RGB zLib MPEG2 Theora AAC FreeType2 JPEG PNG cloud (servers, local)

Basically this is a request (for anyone who got time on his hands) to add mousewheel support to all SCUMM based games.

It's done for two games already by strangerke (Rex Nebular) and Bonki (Bud Tucker) and i'm loving it.
It makes the games more fun to play.

I know that mousewheel support wasn't in the originals, but the games would profit a great deal from it (imho).
I just played Indiana Jones 4 recently and caught myself turning the mouse wheel when i tried to look for a certain inventory item.

Here is the link to the Bud Tucker implementation:
​https://github.com/scummvm/scummvm/commit/7e0cac25de91ff2d1f14cd852e0a2b8dba64d173

Thanks a lot

AmigaOS4 - SDL - PPC - BE
gcc (adtools build 5.4.0) 5.4.0

[bonki]

As far as I understand it SCUMM games implement verb and inventory handling via their own scripts so this might not be possible without hooking deeply into the respective scripts, which we probably don't want.

[raziel-]

Understood.

Thank you for taking a look