SpinBox does not receive "focus_entered" Event

[ModProg]

Godot version:
v3.2.3.stable.official

Issue description:
While trying to implement the Inspector UI in gdscript I was unable to listen for the SpinBox focus to set the focus effect to the whole line accordingly.

This is also the case for the ScrollBar.

Steps to reproduce:
Create a SpinBox and listen to the focus_entered Event

Minimal reproduction project:

FocusEvent.zip

[EricEzaM]

This might be intentional? The control actually receiving the focus is the line edit, which you can access by spin_box.get_line_edit( ). Connect to the signals on that and it should work.

[ModProg]

Then there should at least be a warning when connecting this signal in the Editor. 09.11.2020 00:16:33 Eric M <[email protected]>:

…

This might be intentional? The control actually receiving the focus is the line edit, which you can access by get_line_edit( ). Connect to the signals on that and it should work. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub[#43338 (comment)], or unsubscribe[https://github.com/notifications/unsubscribe-auth/AC3MQXYW72LDX57M5W4ABO3SO4RE7ANCNFSM4TLUKF6A]. [https://github.com/notifications/beacon/AC3MQX6RCS3UBLWBAVLVKITSO4RE7A5CNFSM4TLUKF6KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOFMRH5PI.gif]

[ghost]

That's weird functionality. Going between a Checkbox and a Spinbox with keyboard Left, Right, Up, Down looks like is selecting some hidden in-between control. So what's actually selected is the Spinbox parent LineEdit control? That doesn't sound like a proper design. Because Tab and Shift+Tab selects it correctly. This intended functionality is confusing.

with Up Down
seems to select a ghost control when entering/leaving a checkbox

with Tab Shift+Tab
works properly but still selects a ghost control on Shift+Tab when leaving from or entering a checkbox

[cyberpuffin-digital]

This issue persists through 4.1.3, as mentioned in #73351.