Update app.py

app.py

@@ -196,6 +196,7 @@ def update_content(section):
 
 # Define the Gradio interface with a sidebar for navigation
 with gr.Blocks(theme=MPGPoster()) as demo:
+    state = gr.State(value="Introduction")
     with gr.Row():
         with gr.Column(scale=1):
             gr.Markdown("## Navigation")
@@ -203,11 +204,13 @@ with gr.Blocks(theme=MPGPoster()) as demo:
             section_buttons = [gr.Button(value=section) for section in sections]
             
             for button, section in zip(section_buttons, sections):
-                button.click(fn=update_content, inputs=section, outputs=content)
+                button.click(fn=update_content, inputs=state, outputs=content).then(
+                    fn=lambda x: section, inputs=None, outputs=state
+                )
         
         with gr.Column(scale=4):
             content
-
+            
     with gr.Row():
         iface = gr.Interface(
             fn=all,