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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> | |
| """ | |
| ) | |