libretro / libretro/RetroArch

Mouse button remapping for Spinners+Trackballs (LR clicks coming from a separate device), important feature

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Dominant language
C
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Description

If you have a dedicated spinner, you can't assign buttons on the "controller" as the "mouse click 1&2", only the device mouse clicks work.

The spinners have their own decoders (USB).

With the MAME core you can just assign any input function to any controller device, so no issue there. But every other core is "broken" in this regard.

Can't use physical spinners with player buttons due to having no way to map these game inputs to something other than device ID mouse click.

https://cdn.discordapp.com/attachments/434713532341288961/1075494085751750686/image.png
Something like this would make spinners work for PS1, SNES, NES and Master System paddle games.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by comparing RetroArch's controller-device mapping with the MAME core behavior described in the issue, focusing on how spinner and trackball clicks reach non-MAME cores. Define the supported mapping behavior for PS1, SNES, NES, and Master System paddle games, and verify that physical spinner buttons can be assigned to the required player inputs.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
frontend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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