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"""Frameworks for running multiple Streamlit applications as a single app.
"""
import streamlit as st
# app_state = st.experimental_get_query_params()
# app_state = {k: v[0] if isinstance(v, list) else v for k, v in app_state.items()} # fetch the first item in each query string as we don't have multiple values for each query string key in this example
class MultiApp:
"""Framework for combining multiple streamlit applications.
Usage:
def foo():
st.title("Hello Foo")
def bar():
st.title("Hello Bar")
app = MultiApp()
app.add_app("Foo", foo)
app.add_app("Bar", bar)
app.run()
It is also possible keep each application in a separate file.
import foo
import bar
app = MultiApp()
app.add_app("Foo", foo.app)
app.add_app("Bar", bar.app)
app.run()
"""
def __init__(self):
self.apps = []
def add_app(self, title, func):
"""Adds a new application.
Parameters
----------
func:
the python function to render this app.
title:
title of the app. Appears in the dropdown in the sidebar.
"""
self.apps.append({"title": title, "function": func})
def run(self):
app_state = st.experimental_get_query_params()
app_state = {
k: v[0] if isinstance(v, list) else v for k, v in app_state.items()
} # fetch the first item in each query string as we don't have multiple values for each query string key in this example
# st.write('before', app_state)
titles = [a["title"] for a in self.apps]
functions = [a["function"] for a in self.apps]
default_radio = titles.index(app_state["page"]) if "page" in app_state else 0
st.sidebar.title("Navigation")
title = st.sidebar.radio("Go To", titles, index=default_radio, key="radio")
app_state["page"] = st.session_state.radio
# st.write('after', app_state)
st.experimental_set_query_params(**app_state)
# st.experimental_set_query_params(**st.session_state.to_dict())
functions[titles.index(title)]()
st.sidebar.title("Contribute")
st.sidebar.info(
"This is an open source project and you are very welcome to contribute your "
"comments, questions, resources and apps as "
"[issues](https://github.com/giswqs/streamlit-geospatial/issues) or "
"[pull requests](https://github.com/giswqs/streamlit-geospatial/pulls) "
"to the [source code](https://github.com/giswqs/streamlit-geospatial). "
)
st.sidebar.title("About")
st.sidebar.info(
"""
This web [app](https://share.streamlit.io/giswqs/streamlit-geospatial/app.py) is maintained by [Qiusheng Wu](https://wetlands.io). You can follow me on social media:
[GitHub](https://github.com/giswqs) | [Twitter](https://twitter.com/giswqs) | [YouTube](https://www.youtube.com/c/QiushengWu) | [LinkedIn](https://www.linkedin.com/in/qiushengwu).
This web app URL: <https://streamlit.gishub.org>
"""
)
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