Visual improvements for csv graphs

cage_func.py

@@ -364,16 +364,17 @@ def set_current_vec(vector):  # sets needed currents on each axis for given vect
 
 
 def devices_ok(xy_off=False, z_off=False, arduino_off=False):
-    # ToDo: comments
-    try:
-        if not xy_off:
-            if g.XY_DEVICE is not None:
-                g.X_AXIS.update_status_info()
-                if g.X_AXIS.connected != "Connected":
-                    return False
-            else:
+    # check if all devices are connected, return True if yes
+    # checks for individual devices can be disabled by parameters above (default not disabled)
+    try:  # handle errors while checking connections
+        if not xy_off:  # if check for this device is not disabled
+            if g.XY_DEVICE is not None:  # has the handle for this device been set?
+                g.X_AXIS.update_status_info()  # update info --> this actually communicates with the device
+                if g.X_AXIS.connected != "Connected":  # if not connected
+                    return False  # return and exit function
+            else:  # if handle has not been set the device is inactive --> not ok
                 return False
-        if not z_off:
+        if not z_off:  # same as above
             if g.Z_DEVICE is not None:
                 g.Z_AXIS.update_status_info()
                 if g.Z_AXIS.connected != "Connected":
@@ -381,12 +382,12 @@ def devices_ok(xy_off=False, z_off=False, arduino_off=False):
             else:
                 return False
 
-        if not arduino_off:
-            g.ARDUINO.update_status_info()
+        if not arduino_off:  # check not disabled
+            g.ARDUINO.update_status_info()  # update status info --> attempts communication
             if g.ARDUINO.connected != "Connected":
                 return False
-    except Exception as e:
-        messagebox.showerror("Error!", "Error while checking devices: \n%s" % e)
-        return False
-    else:
+    except Exception as e:  # if an error is encountered while checking the devices
+        messagebox.showerror("Error!", "Error while checking devices: \n%s" % e)  # show error pop-up
+        return False  # clearly something is not ok
+    else:  # if nothing has triggered so far all devices are ok --> return True
         return True