Keep floating window centered when resized

[mrflos]

Hello,
I'm using centered floating windows for pdf and image preview, but when i resize them, they don't keep centered...
Any way to archive that ? I searched the options, but found none.

[Sempyos]

We don't have an option for that, however you may be able to script a solution with the IPC

[mrflos]

Is there any example of scripts with IPC ?
i can see the event with niri msg event-stream :

Window opened or changed: Window { id: 64, title: Some("IMG_0269.JPG - 3/9 - 3264x1832 - 54%"), app_id: Some("Viewnior"), pid: Some(5075), workspace_id: Some(1), is_focused: true, is_floating: true, is_urgent: false, layout: WindowLayout { pos_in_scrolling_layout: None, tile_size: (1788.0, 1234.0), window_size: (1786, 1232), tile_pos_in_workspace_view: Some((654.0, 119.0)), window_offset_in_tile: (1.0, 1.0) }, focus_timestamp: Some(Timestamp { secs: 20036, nanos: 293715643 }) }

But how to interact with it?

[YaLTeR]

You could press the center-window bind afterward

[Sempyos]

Oh, I didn't realize that worked for floating windows

[mrflos]

ok thanks @YaLTeR and @Sempyos

I made this script :

#!/usr/bin/env bash

WINDOW_JSON=$(niri msg --json focused-window)
IS_FLOATING=$(echo "$WINDOW_JSON" | jq '.is_floating')

niri msg action set-column-width $1;

if [ "$IS_FLOATING" == "true" ]; then
 niri msg action center-window
fi

after put this in my niri config:

    Mod+Equal { spawn-sh "~/Code/nixos-config/scripts/center-after-resize.sh +10%"; }
    Mod+Minus { spawn-sh "~/Code/nixos-config/scripts/center-after-resize.sh -10%"; }

Probably not the most elegant way but it seems to work.