Fails to use input method when renaming nodes

[timothyqiu]

Godot version

1d21779

System information

Arch Linux, GLES 3, Mesa Intel(R) UHD Graphics (CML GT2)

Busquad edit: also presented on Windows (#62476)

Issue description

This happens since alpha4. Cannot reproduce on 3.x.

When renaming nodes in the Scene dock:

• Sometimes, I can't even switch input method on (Ctrl-Space produces a space).
• When input method is on:
  • The IME window sometimes flickers: Everytime I press a key, it shows for a brief moment and seems immediately canceled.
  • The IME window sometimes don't appear at all. All key presses goes directly into the LineEdit.

IME works fine in other LineEdits in the editor interface. Renaming animation/library in the Animation Library editor have the same issue. Maybe it's a Tree issue?

Steps to reproduce

1. Create a Node.
2. Double click to rename it.
3. Try to switch IME on (e.g. CTRL-SPACE for fcitx5).
4. Type something when IME is on.

Minimal reproduction project

No response

[timothyqiu]

Bisected and this behavior is introduced since #58490

CC @bruvzg

[KoBeWi]

Not sure if related, but #58490 still has unresolved review comment that is still relevant: #58490 (review)

[timothyqiu]

I tried the fix that review comment suggests, this issue is still there.

BTW, I also found that the issue is not reproducible when using single window mode.

[Rindbee]

Presumably I enabled Share the same input method among all applications in IBus Preferences, so this bug affects me less.

For me, it behaves like the picture above most of the time.

After the problem occurs, click on an external program, and then continue, it is normal.

[akien-mga]

Is this still reproducible in the latest 4.0 betas?

[timothyqiu]

Still reproducible in 4.0.beta11.

[bruvzg]

Should be fixed by #70052