1444581 - [UI Events] Set key value of keydown/keyup event to "AltGraph" if active keyboard layout has actually AltGr and pressed AltRight key on Windows

Status: RESOLVED DUPLICATE of bug 900750

(Core :: Widget: Win32, enhancement)

Description

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

In https://github.com/w3c/uievents/issues/147, Google suggested better AltGr event dispatching on Windows.

On Windows, AltGr is represented as both Ctrl and Alt keys are pressed. Therefore, currently, we never dispatch AltGr key events on Windows but this is not good behavior for web developers.

First, we need to change KeyboardLayout a little bit to check if active keyboard layout has AltGr key actually.

Next, if active keyboard layout has AltGr and AltRight key is pressed, we should set key value to AltGr in this case (and clear Alt and Control modifier state).

Google Chrome has implemented this:
https://chromium-review.googlesource.com/c/chromium/src/+/558584

Although I'm not sure when we should enable this in default settings.

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Oops, I forgot there is a bug for this.