Added saving of parameters & improved popup clarity

interface.py

@@ -299,10 +299,10 @@ class App(object):
         self.root.mainloop()
 
     def on_close(self):
-        save = Popup(prompt="Save and exit?", options=["Yes", "No", "Cancel"]).pressed
+        save = Popup(prompt="Save and exit?", options=["Yes", "Exit without saving", "Cancel"]).pressed
         if save == "Yes":
             self._quit()
-        if save == "No":
+        if save == "Exit without saving":
             self.root.quit()
             self.root.destroy()
         else:
@@ -763,10 +763,25 @@ class App(object):
         -------
         None : Saves coords in a json file, quits and destroys root.
         """
+        # save results
         save_dict(
             self.klicker.coords, 
             self.DIR_OUT,
             os.path.basename(self.WAVEFILE)[:-4]+"-contours.json")
         
+        # save parameters
+        save_dict(
+            {
+            "PCEN": (self.switch_view_button['text'] == "Switch to PCEN"),
+            "SR": self.NEW_SR,
+            "NFFT":self.NFFT,
+            "HOP_LENGTH":self.HOP_LENGTH,
+            "CLIPPING":self.CLIPPING
+            }, 
+            os.path.join(self.DIR_OUT, "parameters"), 
+            os.path.basename(self.WAVEFILE)[:-4]+"-params.json"
+        )
+
+        # quit window
         self.root.quit()
         self.root.destroy()
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