Keyboard navigation using cursor keys does not work in web demo

[vi]

1. Navigate to https://emilk.github.io/egui/#demo
2. Press enough Tabs to get to to checkbox
3. Press Down or Up key on keyboard

Expected:

It navigates to "First" radio button or to "Click me" respectively.

Actual:

Keypress seems to be ignored.

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Especially annoying when trying to edit combobox with keyboard only.

[akhilman]

I would also like to have navigation with an arrow keys.
But I would like to have separate events, such as focus to the left, focus on the right, focus up and focus down, so the user will be able to bind these events to anything that he/she wants, for example, Alt + Arrows, or HJKL or Gamepad's Pad.

This can be implemented as an array of tuples (the coordinates of the widget on the screen, widget's ID), as well as the same touple for the current active widget.
Then we are looking for the nearest widget in the selected direction from the current widget and switch the focus to it.

[emilk]

What is needed in order to accomplish keyboard navigation has been discussed in more detail in #1250, so I'll close that in favor of #1250

[jabeka]

The issue (and #383 which seems a duplicate of this one) is still present on egui 0.28.1 although #1250 is closed.
Can a maintainer please re-open it ?
EDIT : my bad, this actually kinda works with some heavy limitations :

• the user needs to open the CB first with space or enter key then use the arrows
• if the scrolling menu is over some other widgets, they will be selected instead of the CB items
• If the CB is clicked to be expanded then the arrow keys are useless