removed calculate on initial load

main.py

@@ -105,8 +105,8 @@ def toggle_condition2_inputs(mode):
     State("c2_temp", "value"),
     State("c2_time", "value"),
     State("c2_iterations", "value"),
-    #prevent_initial_call=True,
     State("samples", "value"),
+    prevent_initial_call=True,
 )
 
 def update_chart(n_clicks,

main_layout.py

@@ -1,8 +1,31 @@
 from dash import html, dcc
 import dash_bootstrap_components as dbc
 from data.functions import *
+from figure import build_figure
 
 def build_main_layout() -> html.Div:
+    n = len(soluteData)
+    df0 = pd.DataFrame({
+        "CASRN": soluteData["CASRN"].to_numpy(),
+        "Condition 1": np.zeros(n),
+        "Cond1_err_plus": np.zeros(n),
+        "Cond1_err_minus": np.zeros(n),
+        "Condition 2": np.zeros(n),
+        "Cond2_err_plus": np.zeros(n),
+        "Cond2_err_minus": np.zeros(n),
+    })
+    placeholder_fig = build_figure(df0)
+    placeholder_fig.update_yaxes(range=[-2, 0])
+    placeholder_fig.add_annotation(
+        text="Click 'Calculate' to run model",
+        xref="paper",
+        yref="paper",
+        x=0.5,
+        y=0.5,
+        showarrow=False,
+        font=dict(size=22, color="gray"),
+        align="center",
+    )
     return html.Div(
     style={
         "fontFamily": "Arial, Helvetica, sans-serif",
@@ -464,6 +487,7 @@ def build_main_layout() -> html.Div:
                             ),
                             children=dcc.Graph(
                                 id="mm0_chart",
+                                figure=placeholder_fig,
                                 config={"displayModeBar": False},
                                 # Graph fills the 600x800 parent
                                 style={