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How to hide the prompt-like thing when changing input source?

ng flag
CluelessNoob

I am using ibus-avro on Ubuntu 20.04. I have 2 input sources: en, bn. I am using F8 to switch the sources. When switching, a large prompt-like thing (I don't know the exact term) is shown on screen. I cannot take a screenshot of it (Print Screen is not working while it is visible), but it looks something like this:

prompt-like thing looks like this

It is annoying, and it also seems to prevent typing for a moment until it goes away. How to hide this and just switch the input source instantly? Thanks.

UPDATE: This issue does not seem that annoying when using Ctrl+Space or Super+Space for switching input sources. In those cases, it only seems to be visible as long as the Ctrl or Super (respectively) key is held down.

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br flag
UnKNOWn
One way is to create commands and attach them to F8. Otherway is to patch the gnome-shell code.
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br flag
UnKNOWn
SuSpace.sh script in this link is one possibility to bind the script to F8 Key. https://askubuntu.com/a/1198150/739431
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br flag
UnKNOWn
You can also use gnome tweaks to change the input sources without notification on screen but that don't accept single key from Fn keys
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ng flag
CluelessNoob
@UnKNOWn I just tried Ctrl+Space and also Super+Space from the keyboard shortcuts settings and none of them seems to have this issue. However, I would prefer using F8. Need to try the script I guess.
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br flag
UnKNOWn
Yes but is F8 Choosable as a Keybinding??
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ng flag
CluelessNoob
@UnKNOWn From here, yes: Settings --> Keyboard Shortcuts --> Typing --> Switch to next input source. That also auto-changes the Switch to previous input source shortcut to Shift+F8.
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br flag
UnKNOWn
If you can assign shortcut key to F8.. you can bind F8 to run the above script. Have you tried that?
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ng flag
CluelessNoob
@UnKNOWn Yes, it's working! I modified the script a little bit though (mainly replaced the `math` variable with `$((currentLang+1))`), then saved it as an executable, added it as a shortcut from the Keyboard Shortcuts settings, and it works. Thanks. Please post it as an answer.
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br flag
UnKNOWn

Workaround Only

You can create an executable script with below content and bind the script to F8 Key

#!/bin/bash

totalLang=$(gdbus call --session --dest org.gnome.Shell --object-path /org/gnome/Shell --method org.gnome.Shell.Eval "imports.ui.status.keyboard.getInputSourceManager()._mruSources.length" | grep -oP "(?<=').*?(?=')")

currentLang=$(gdbus call --session --dest org.gnome.Shell --object-path /org/gnome/Shell --method org.gnome.Shell.Eval "imports.ui.status.keyboard.getInputSourceManager().currentSource.index" | grep -oP "(?<=').*?(?=')")

math=$((currentLang+1))

if [ "$math" -lt "$totalLang" ]; then
gdbus call --session --dest org.gnome.Shell --object-path /org/gnome/Shell --method org.gnome.Shell.Eval "imports.ui.status.keyboard.getInputSourceManager().inputSources["$currentLang+1"].activate()"
else
gdbus call --session --dest org.gnome.Shell --object-path /org/gnome/Shell --method org.gnome.Shell.Eval "imports.ui.status.keyboard.getInputSourceManager().inputSources[0].activate()"
fi
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