Good for now

indicators.py

@@ -31,7 +31,7 @@ import scipy.signal as sig
 import plotly.express as px
 from plotly.subplots import make_subplots
 # import plotly.graph_objects as go
-from dash import Dash, html, dcc, callback, Output, Input, no_update
+from dash import Dash, html, dcc, callback, Output, Input, State, no_update
 from waitress import serve
 import json
 import io
@@ -858,6 +858,7 @@ if __name__ == "__main__":
             style={'height':'85vh'}
         ),
         dcc.Store(id="signal"),
+        # dcc.Store(id="dropdown-index"),
         dcc.Interval(
             id='interval-component',
             interval=3*1000, # in milliseconds
@@ -868,23 +869,29 @@ if __name__ == "__main__":
 
     # start button callback
     @callback(Output('interval-component', 'disabled'),
-            Output("start-button", "children"),
-            Input("start-button", "n_clicks"))
+              Output("start-button", "children"),
+              Output('controls-and-radio-item', 'disabled'),
+              Input("start-button", "n_clicks"),)
+    
     def start_cycle(n):
         if n:
             if n%2 == 0:
-                return True, "Auto Play"
+                return True, "Auto Play", False
             else:
-                return False, "Pause"
+                return False, "Pause", True
         return no_update
     
     # interval callback
-    @callback(Output('controls-and-radio-item', 'value'), Input("interval-component", "n_intervals"))
-    def cycle_syms(n):
-        # if not n:
-        #     return no_update
-        syms=["AMZN", "GOOGL", "AAPL", "SPY"]
-        return syms[n % 4]
+    @callback(Output('controls-and-radio-item', 'value'),
+              Input("interval-component", "n_intervals"),
+              State('controls-and-radio-item', 'options'),
+              # State('dropdown-index', 'data'),
+              )
+    def cycle_syms(n, syms):
+        if syms:
+            return syms[n % len(syms)]
+        else:
+            return no_update
 
     @cache.memoize(timeout=14400) # cache timeout set to 4 hours
     def global_store():
@@ -930,6 +937,7 @@ if __name__ == "__main__":
 
     # Add controls to build the interaction
 
+    # callback when data retrieve finishes triggered by signal
     @callback(
         Output(component_id='controls-and-radio-item', component_property='options'),
         Output(component_id='button', component_property='disabled'),
@@ -950,12 +958,16 @@ if __name__ == "__main__":
 
         return sorted(all_plot_sym), False, False
 
+    # dropdown callback
     @callback(
         Output(component_id='controls-and-graph', component_property='figure'),
+        # Output("dropdown-index", "data"),
         Input(component_id='controls-and-radio-item', component_property='value'),
+        # State('controls-and-radio-item', 'options')
         # Input(component_id='signal', component_property='data'),
     )
       
+    # def update_graph(col_chosen, syms):
     def update_graph(col_chosen):
         if not col_chosen:
             raise PreventUpdate
@@ -1047,6 +1059,7 @@ if __name__ == "__main__":
         fig.update_layout(margin=dict(l=30, r=20, t=50, b=20))
 
         return fig
+        # return fig, syms.index(col_chosen)
     
     serve(app.server, host="0.0.0.0", port=8050, threads=7)
     # app.run(debug=True)