app.py

import streamlit as st 

import time
from datetime import datetime

# Set page config
st.set_page_config(page_title="Sidebar Status Indicator", layout="wide")

# Initialize session state
if 'process_running' not in st.session_state:
    st.session_state.process_running = False
if 'last_update' not in st.session_state:
    st.session_state.last_update = datetime.now().strftime("%H:%M:%S")
if 'process_name' not in st.session_state:
    st.session_state.process_name = ""

# Functions to handle process state
def start_process(name):
    st.session_state.process_running = True
    st.session_state.process_name = name
    st.session_state.last_update = datetime.now().strftime("%H:%M:%S")
    
def stop_process():
    st.session_state.process_running = False
    st.session_state.last_update = datetime.now().strftime("%H:%M:%S")

# Function to run a simulated process
def run_process(name, duration=3):
    start_process(name)
    
    # Create a progress bar in the main area
    progress_text = f"Running {name}..."
    progress_bar = st.progress(0)
    
    # Simulate work
    for percent_complete in range(100):
        time.sleep(duration/100)
        progress_bar.progress(percent_complete + 1, text=progress_text)
    
    # Mark process as complete
    stop_process()
    st.success(f"{name} completed!")
    
    # This will trigger a rerun to update the sidebar
    st.experimental_rerun()

# Configure the sidebar with our status widget
with st.sidebar:
    st.title("App Status")
    
    # Status indicator
    status_container = st.container()
    with status_container:
        # Style based on current status
        if st.session_state.process_running:
            st.warning(f"⚙️ RUNNING: {st.session_state.process_name}")
        else:
            st.success("✅ IDLE")
        
        # Last update time
        st.caption(f"Last update: {st.session_state.last_update}")
        
        # Stop button (only show when process is running)
        if st.session_state.process_running:
            if st.button("⏹️ Stop Process"):
                stop_process()
                st.experimental_rerun()
    
    # Add a separator
    st.markdown("---")
    
    # Navigation options
    st.subheader("Navigation")
    nav_selection = st.radio("Go to:", ["Home", "Section 1", "Section 2", "Section 3"])
    
    # Additional sidebar content
    st.markdown("---")
    st.markdown("### App Info")
    st.info("This app demonstrates using the sidebar for a persistent status indicator.")

# Main content area based on navigation
st.title("App with Sidebar Status")

# Display content based on navigation selection
if nav_selection == "Home":
    st.header("Home")
    st.write("Welcome to the application. Use the sidebar to navigate and view the current status.")
    
    # Add a simple process trigger
    if st.button("Run Quick Process"):
        run_process("Quick Process", 2)
    
    # Add sample content
    st.markdown("### Sample Content")
    st.write("Scroll down to see more content while the sidebar remains fixed.")
    
    for i in range(15):
        st.write(f"Content line {i}")

elif nav_selection == "Section 1":
    st.header("Section 1")
    st.write("This is Section 1 of the application.")
    
    col1, col2 = st.columns(2)
    with col1:
        if st.button("Run Process A"):
            run_process("Process A", 3)
    
    with col2:
        if st.button("Run Process B"):
            run_process("Process B", 4)
    
    # Add sample content
    for i in range(15):
        st.write(f"Section 1 content line {i}")

elif nav_selection == "Section 2":
    st.header("Section 2")
    st.write("This is Section 2 of the application.")
    
    # Add a more complex process trigger
    process_type = st.selectbox("Select Process Type", ["Data Analysis", "Model Training", "Report Generation"])
    
    if st.button("Start Selected Process"):
        run_process(process_type, 5)
    
    # Add sample content
    for i in range(15):
        st.write(f"Section 2 content line {i}")

elif nav_selection == "Section 3":
    st.header("Section 3")
    st.write("This is Section 3 of the application.")
    
    # Add tabs within the section
    tab1, tab2 = st.tabs(["Tab A", "Tab B"])
    
    with tab1:
        st.subheader("Tab A Content")
        if st.button("Run Tab A Process"):
            run_process("Tab A Process", 3)
        
        for i in range(10):
            st.write(f"Tab A content line {i}")
    
    with tab2:
        st.subheader("Tab B Content")
        if st.button("Run Tab B Process"):
            run_process("Tab B Process", 4)
        
        for i in range(10):
            st.write(f"Tab B content line {i}")

# Add additional content to ensure scrollability
st.markdown("---")
st.subheader("Additional Information")
st.write("This section demonstrates that the sidebar status indicator remains visible while scrolling.")

for i in range(10):
    st.write(f"Additional information line {i}")

# Add a back-to-top button at the bottom
if st.button("Back to Top"):
    # This doesn't actually scroll to top, but it does refresh the page
    pass

# --- SHARED ON ALL PAGES ---
st.logo(image="images/menu_book_60dp_75FBFD.png")
st.sidebar.title("SBS V2.0 mapper")
st.sidebar.subheader("(work in progress)")
st.sidebar.text("Demo by JA-RAD")

# --- PAGE SETUP ---
type_text_page = st.Page(
    page="pages/type_text.py",
    title="DEMO (work in progress)",
    icon=":material/keyboard:",
    default=True,)

# --- NAVIGATION SETUP ---
pg = st.navigation(pages=[type_text_page]) # WITHOUT SECTIONS
#pg = st.navigation({"Chapter_Index": [start_page], "Demo": [type_text_page, upload_file_page], "About": [about_page]}) # WITH SECTIONS
pg.run()