add ability to disable calling show

Author: rhooper

adafruit_led_animation/animation/__init__.py

@@ -81,11 +81,13 @@ def __init__(self, pixel_object, speed, color, peers=None, paused=False, name=No
     def __str__(self):
         return "<%s: %s>" % (self.__class__.__name__, self.name)
 
-    def animate(self):
+    def animate(self, show=True):
         """
         Call animate() from your code's main loop.  It will draw the animation draw() at intervals
         configured by the speed property (set from init).
 
+        :param bool show: Whether to automatically call show on the pixel object when an animation
+                          fires.  Default True.
         :return: True if the animation draw cycle was triggered, otherwise False.
         """
         if self._paused:
@@ -97,11 +99,13 @@ def animate(self):
 
         # Draw related animations together
         for anim in self._peers:
+            anim.draw_count += 1
             anim.draw()
             anim.after_draw()
 
-        for anim in self._peers:
-            anim.show()
+        if show:
+            for anim in self._peers:
+                anim.show()
 
         # Note that the main animation cycle_complete flag is used, not the peer flag.
         for anim in self._peers:

adafruit_led_animation/animation/rainbowwave.py

@@ -148,17 +148,20 @@ def add_cycle_complete_receiver(self, callback):
         """
         self._also_notify.append(callback)
 
-    def animate(self):
+    def animate(self, show=True):
         """
         Call animate() from your code's main loop.  It will draw all of the animations
         in the group.
 
         :return: True if any animation draw cycle was triggered, otherwise False.
         """
         if self._sync:
-            return self._members[0].animate()
+            result = self._members[0].animate(show=False)
+            if result and show:
+                self._members[0].show()
+            return result
 
-        return any([item.animate() for item in self._members])
+        return any([item.animate(show) for item in self._members])
 
     @property
     def color(self):

adafruit_led_animation/group.py

@@ -205,7 +205,7 @@ def random(self):
         """
         self.activate(random.randint(0, len(self._members) - 1))
 
-    def animate(self):
+    def animate(self, show=True):
         """
         Call animate() from your code's main loop.  It will draw the current animation
         or go to the next animation based on the advance_interval if set.
@@ -214,7 +214,7 @@ def animate(self):
         """
         if not self._paused and self._advance_interval:
             self._auto_advance()
-        return self.current_animation.animate()
+        return self.current_animation.animate(show)
 
     @property
     def current_animation(self):