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Bug 4174

Summary: [patch] Add touchscreen mouse emulation and pressure support to SDL_evdev
Product: SDL Reporter: Zack Middleton (zturtleman) <zack>
Component: eventsAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: icculus
Version: HG 2.0   
Hardware: ARM   
OS: Linux   
Attachments: evdev: ignore BTN_TOUCH, support SDL_TOUCH_MOUSEID and pressure.

Description Zack Middleton (zturtleman) 2018-05-25 21:41:56 UTC 
Created attachment 3248 [details]
evdev: ignore BTN_TOUCH, support SDL_TOUCH_MOUSEID and pressure.

Silence warning about EVDEV KeyCode 330 (BTN_TOUCH) when pressing or releasing touchscreen.[1]
Add support for touchscreen mouse emulation using SDL_TOUCH_MOUSEID to SDL_evdev.
Add unverified support for touchscreen pressure to SDL_evdev.

Tested on Raspbian Stretch with the official Raspberry Pi 7" touchscreen (no pressure support).

[1] INFO: The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL forums/mailing list <https://discourse.libsdl.org/> EVDEV KeyCode 330
Comment 1 Ryan C. Gordon 2019-01-15 00:43:59 UTC 
This patch is now https://hg.libsdl.org/SDL/rev/f100ca4dd31e, thanks!

--ryan.