implement tablet mode (disabling keyboard and mouse/touch pad) #238
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Can be triggered by a dedicated hardware switch, or by a toggle action.
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Open question: Can we reliably distinguish internal from external devices? If yes, we might only want to disable internal devices.
Could you check what mutter does? Its tablet support isn't perfect by any means, but there's one maintainer constantly using it with a tablet.
| @@ -1572,6 +1598,13 @@ fn should_intercept_key( | |||
| disable_power_key_handling, | |||
| ); | |||
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| if tablet_mode { | |||
| if final_action != Some(Action::ToggleTabletMode) { | |||
| suppressed_keys.insert(key_code); | |||
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Doesn't this need to remove on key release?
| @@ -697,6 +703,10 @@ impl State { | |||
| } | |||
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| fn on_pointer_motion<I: InputBackend>(&mut self, event: I::PointerMotionEvent) { | |||
| if self.niri.tablet_mode { | |||
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I'm thinking, maybe handle all of these one level above? I.e. before dispatching in process_input_event(), do:
if self.niri.tablet_mode && matches!(event, ...) {
return;
}
| @@ -195,6 +195,7 @@ pub struct Niri { | |||
| pub gesture_swipe_3f_cumulative: Option<(f64, f64)>, | |||
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| pub lock_state: LockState, | |||
| pub tablet_mode: bool, | |||
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| pub tablet_mode: bool, | |
| // Tablet mode for convertibles: disable regular pointer and keyboard input. | |
| pub tablet_mode: bool, |
As far as I can tell, mutter just sets a property called Unfortunately, the tablet switch in my convertible is not supported on linux, so I cannot verify this behavior myself. I'm inclined to shelve this PR until testing can be done on more devices. |
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Alright, thanks for checking. No rush, let's wait until we figure out better what's happening. |
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I think it's a useful feature to have regardless. I have an old convertible laptop.... somewhere I can use for testing if it would help, but it never had consistently working "tablet mode" in any DE. so I think having niri capable of doing it at the compositor level is at least useful. |
So apparently that's exactly what happens on ThinkPad convertibles at least, the keyboard is disabled at a hardware level. In Mutter / Shell it just makes the on-screen keyboard pop up, and enables auto-rotation (although I've heard feedback that the auto-rotation toggle should not really be tied to the tablet mode, as it can be useful outside also). |
Can be triggered by a dedicated hardware switch, or by a toggle action.
Open question: Can we reliably distinguish internal from external devices? If yes, we might only want to disable internal devices.