tkinter calibration text update

raspberry-pi/gui/mainWindow.py

@@ -24,11 +24,14 @@ class MainWindow(tk.Frame):
     calibrate_button.pack(side="top")
     calibrate_button_next = tk.Button(self.controls,text="calibrate_next",command=self.calibration_state.next_state)
     calibrate_button_next.pack(side="top")
-    cs = tk.Label(self.controls, text=str(self.calibration_state.return_state()), anchor="c")
+
+    self.csString = tk.StringVar()
+    cs = tk.Label(self.controls, textvariable=self.csString, anchor="c")
     cs.pack(side="top", fill="both", expand=True)
 
   def update(self):
     self.graph.update()
+    self.csString.set(self.calibration_state.state_clearname())
     self.root.after(30, self.update)
 
   def calibrate(self):