How to programmatically trigger Table column sorting? about imgui HOT 2 CLOSED

The goal is to save the user's column sorting preference so that the next time the window is opened, the table is already sorted according to their last selection.

If that's the goal, you have nothing to do as this should already be saved in imgui.ini.
If it's not saved, you have another problem and you should investigate this precise problem, maybe by crafting a repro.

To answer the question, the function to call in imgui_internal.h is TableSetColumnSortDirection():

void TableSetColumnSortDirection(int column_n, ImGuiSortDirection sort_direction, bool append_to_sort_specs);

By setting append_to_sort_specs = false you can clear existing specs and replace this with the new one.
HOWEVER, as per your statement, I don't think you should call this. You should instead aim to understand why your data isn't saved, because lack of save will come with other issues
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from imgui.

Thank you for pointing that out, Omar! The problem was with the ID stack, each time a new table key was being saved in the imgui.ini file, at first I tried various things (e.g. adding ##/### id in BeginTable, adding PushID/PushOverrideID), but nothing worked as the issue was with the incorrect value being used in PushID way before that table code snippet.

from imgui.