How to reset dialog's widget values when reopen dialog after close with "X"?

Using Streamlit
,
1

If I change values of some widgets in a dialog, next close it by pressing “X” or clicking anywhere on screen and open it again I see widgets with edited values.
How to prevent streamlint dialog from keeping changed values in such case?
Looks like it could be possible by ss.rerun() in “X” / clicking anywhere event handler but there is not such event.

2

You can add keys to the widgets and set them to a default value before creating them:

import streamlit as st


@st.dialog("A dialog")
def show_dialog():
    st.session_state.dialog_text = ""
    st.text_input("Say something", key="dialog_text")


if st.button("Show dialog"):
    show_dialog()

As you add more widgets this can become inconvenient, I guess you could use a form with clear_on_submit=True in that case (not tested).