run.py

import gradio as gr

elemIDs=list(range(5)) # elemIDs 0-4
internal_state=0
 
def toggler(visibility=[]):
   if(len(visibility)==0):
     print("restore visibility to "+str(list(range(1,len(elemIDs))))) 
     visibility=list(range(len(elemIDs))) # visibility of all buttons by default (i.e., without textbox)
   #visibility=[str(e) for e in visibility]
   l=[]
   l.append(gr.Textbox("Visible Text", visible=(0 in visibility)))
   l.append(gr.Button("Submit",        visible=(1 in visibility)))
   l.append(gr.Button("Button 2",      visible=(2 in visibility)))
   l.append(gr.Button("Button 3",      visible=(3 in visibility)))
   l.append(gr.Button("Button 4",      visible=(4 in visibility)))
   print("Toggler:\n\nelemIDs="+str(elemIDs)+"\n\nVisibility="+str(visibility)+"\n\nl="+str(l)) #+"\n\ntest4="+str(4 in visibility))
   return l

def listener(btn):
  r=0
  if(btn=="Submit"):   r=1
  if(btn=="Button 2"): r=2
  if(btn=="Button 3"): r=3
  if(btn=="Button 4"): r=4
  print("Listener:\n\nbtn="+str(btn)+"\n\nr="+str(r))
  return gr.Radio([str(e) for e in elemIDs],label="Button clicked",value=str(r))

def respond(message, chat_history, visible_elemIDs):
  global internal_state
  previous_state = internal_state
  internal_state = message
  visible_elemIDs= [e for e in visible_elemIDs if str(e) != str(internal_state)] # streiche button zum aktuellen state
  bot_message = f"I was in state \"{previous_state}\" and am now in state \"{internal_state}\". please click another button."
  chat_history.append((message, bot_message))
  print("respond:\n\nvisible_elemIDs="+str(visible_elemIDs)+"\n\nbot_message="+str(bot_message))
  return message, chat_history, visible_elemIDs

with gr.Blocks() as demo:
  chatbot = gr.Chatbot(value=[[None, f"I'm in state \"{internal_state}\". Please click a button!"]])
  msg,btn1,btn2,btn3,btn4 = toggler()
  changeableElems=[msg,btn1,btn2,btn3,btn4]
  visibility=gr.Dropdown(
    elemIDs, 
    value=[1,2,3,4], #list(range(len(elemIDs))),
    multiselect=True, 
    visible=True, #False,     
    label="Active Elements") # determine which elements are visible #,visible=False      
  clicked=gr.Radio([str(e) for e in elemIDs],label="Button clicked",value=0) # determine which Element/Button was clicked last
  visibility.change(toggler, inputs=visibility, outputs=changeableElems) # change elemIDs when visibility is changed 
  chatbot.change(toggler, inputs=visibility, outputs=changeableElems) # change elemIDs when chatbot responds
  clicked.change(respond,inputs=[clicked,chatbot,visibility], outputs=[clicked,chatbot,visibility])
  btn1.click(listener, inputs=btn1, outputs=clicked)
  btn2.click(listener, inputs=btn2, outputs=clicked)
  btn3.click(listener, inputs=btn3, outputs=clicked)
  btn4.click(listener, inputs=btn4, outputs=clicked)
  with gr.Row():
      chatbot
      gr.Column([btn1,btn2,btn3,btn4])

demo.launch()