get NumLock status

[jice-nospam]

Right now, we can detect key press on the numlock key, but is there a way to check the status (on/off) of the numlock ?

[jice-nospam]

In fact this might be a bug because we get both ArrowLeft KeyboardInput event and '4' ReceivedCharacter event when we press the numpad 4 key whereas it should be one or another depending on the numlock status

[ArturKovacs]

The original description and the comment following it describe distinct issues.

The first one will require the addition of a new API which can query the status of the numlock key. This overlaps with #1010

The second one is going to be resolved by #753

[Plecra]

I'd like to expand this feature request to resolve khonsulabs/cushy#81. The ModifiersState that we can receive in ModifiersChanged doesn't allow us to read the NumLock or CapsLock states. This doesn't overlap with issue 1010 as an event-based API is still useful even before we have an api to mirror getkey, and it wasn't resolved by #753, though I'm not sure why.

Each KeyboardEvent implementation tracks numlock and capslock. Here's where they're read in linux:

winit/src/platform_impl/linux/common/xkb_state.rs

Lines 649 to 651 in cc33212

	self.caps_lock = mod_name_is_active(ffi::XKB_MOD_NAME_CAPS);
	self.logo = mod_name_is_active(ffi::XKB_MOD_NAME_LOGO);
	self.num_lock = mod_name_is_active(ffi::XKB_MOD_NAME_NUM);

(and here in windows)
but those aren't forwarded to the public ModifiersState

winit/src/platform_impl/linux/common/xkb_state.rs

Line 657 in cc33212

let mut to_mods = crate::keyboard::ModifiersState::empty();

[kchibisov]

@Plecra fill free to extend the event if they are reliably observable on platforms.

[danielhjacobs]

Also wondering the same for Caps Lock and Scroll Lock. It would add a way to fix ruffle-rs/ruffle#13513 (comment)

The JavaScript way to do this is with https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/getModifierState / https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/getModifierState