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Fix evdev emulated scroll events

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When X's evdev input module is configured to emulate scroll events (as
used with e.g. trackpoints), it generates non-emulated scroll button
presses and does not generate motion events. This is contrary to the
behavior of all other hardware I've tested, and contrary to the
behavior of libinput, but nonetheless should be supported.
This commit is contained in:
Benjamin Saunders 2017-07-30 11:40:52 -07:00
parent 45c5568c89
commit c508d68d1d
1 changed files with 13 additions and 1 deletions
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14
src/platform/linux/x11/mod.rs
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@ -370,7 +370,19 @@ impl EventsLoop {
// Suppress emulated scroll wheel clicks, since we handle the real motion events for those.
// In practice, even clicky scroll wheels appear to be reported by evdev (and XInput2 in
// turn) as axis motion, so we don't otherwise special-case these button presses.
4 | 5 | 6 | 7 if xev.flags & ffi::XIPointerEmulated != 0 => {}
4 | 5 | 6 | 7 => if xev.flags & ffi::XIPointerEmulated == 0 {
callback(Event::WindowEvent { window_id: wid, event: MouseWheel {
device_id: did,
delta: match xev.detail {
4 => LineDelta(0.0, 1.0),
5 => LineDelta(0.0, -1.0),
6 => LineDelta(-1.0, 0.0),
7 => LineDelta(1.0, 0.0),
_ => unreachable!()
},
phase: TouchPhase::Moved,
}});
},
x => callback(Event::WindowEvent { window_id: wid, event: MouseInput { device_id: did, state: state, button: Other(x as u8) } })
}