Updated example per feedback in slightlynybbled#29

slightlynybbled · slightlynybbled · commit fb10407349c9 · 2018-05-04T07:18:13.000-04:00
diff --git a/examples/rotary_scale.py b/examples/rotary_scale.py
@@ -3,10 +3,16 @@
 
 from tk_tools.images import rotary_gauge_volt
 
+max_value = 100.0
+min_value = 0.0
+
 
 def increment():
     global value
+
     value += increment_value
+    if value > max_value:
+        value = max_value
 
     p1.set_value(value)
     p2.set_value(value)
@@ -16,6 +22,9 @@ def decrement():
     global value
     value -= increment_value
 
+    if value < min_value:
+        value = min_value
+
     p1.set_value(value)
     p2.set_value(value)
 
@@ -24,11 +33,11 @@ def decrement():
 
     root = tk.Tk()
 
-    p1 = tk_tools.RotaryScale(root, max_value=100.0, size=100, unit='km/h')
+    p1 = tk_tools.RotaryScale(root, max_value=max_value, size=100, unit='km/h')
     p1.grid(row=0, column=0)
 
     p2 = tk_tools.RotaryScale(root,
-                              max_value=100.0,
+                              max_value=max_value,
                               size=100,
                               needle_thickness=3,
                               needle_color='black',
