Toggle Wide Mode

[thetoby9944]

Problem

Cannot toggle layout

StreamlitAPIException: set_page_config() can only be called once per app

Solution

I can access the mode via the settings button - i.e. the checkbox for wide mode. It would be nicer if each page in the app can decide by itself if it wants to be in "wide" mode or "centred" - without the user having to manually adjust the page layout.

MVP:
Programmatically toggle the checkbox in the UI
e.g. st.toggle_layout()

Possible additions:
Add a flag to give a specific width in % or px for the layout

Preferred solution:
If we could nest columns that would be awesome, and I wouldn't need to fiddle with wide mode. I would create a parent column that can fit my whole page

[vdonato]

Hi @thetoby9944, could you explain a bit more about what you're trying to do here, ideally with a small toy-app?

I think that st.set_page_config should give you enough flexibility to be able to toggle between wide and centered mode dynamically when switching between pages of a multi-page app. Since (if I'm remembering correctly) the function works nicely with callbacks, if you're selecting a page in a multipage app using an st.selectbox, for example, you could call st.set_page_config with the desired layout argument within the callback to the widget depending on the page that you're on.

[kmcgrady]

Closing due to inactivity, let us know if there are any issues.