Added easy way to set pixels

Author: Melissa LeBlanc-Williams

adafruit_featherwing/dotstar_featherwing.py

@@ -32,7 +32,6 @@
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_FeatherWing.git"
 
 import board
-import time
 import adafruit_dotstar as dotstar
 
 class DotStarFeatherWing:
@@ -46,10 +45,19 @@ def __init__(self, clock=board.D13, data=board.D11, brightness=0.2):
             :param pin data: The data pin for the featherwing
             :param float brightness: Optional brightness (0.0-1.0) that defaults to 1.0
         """
-        self._rows = 6
-        self._columns = 12
+        self.rows = 6
+        self.columns = 12
         self._brightness = brightness
-        self._dotstar = dotstar.DotStar(clock, data, self._rows * self._columns, brightness=self._brightness)
+        self._dotstar = dotstar.DotStar(clock, data, self.rows * self.columns,
+                                        brightness=self._brightness)
+
+    def __setitem__(self, indices, value):
+        x, y = indices
+        self._dotstar[y * self.columns + x] = value
+
+    def __getitem__(self, indices):
+        x, y = indices
+        return self._dotstar[y * self.columns + x]
 
     def fill(self, color):
         """Fills the wing with a color.
@@ -58,4 +66,3 @@ def fill(self, color):
            :param (int, int, int) color: the color to fill with
         """
         self._dotstar.fill(color)
-

examples/featherwing_dotstar_simpletest.py

@@ -1,4 +1,7 @@
-"""This example changes the screen different colors"""
+"""
+This example changes the screen different colors
+and then draws random pixels at random locations
+"""
 
 from time import sleep
 import random
@@ -11,8 +14,14 @@
 def random_color():
     return random.randrange(0, 8) * 32
 
+for i in range(0, 15):
+    dotstar.fill((random_color(), random_color(), random_color()))
+    sleep(.2)
+
 # MAIN LOOP
 while True:
     # Fill screen with a random color
-    dotstar.fill((random_color(), random_color(), random_color()))
-    sleep(.25)
+    x = random.randrange(0, dotstar.columns)
+    y = random.randrange(0, dotstar.rows)
+    dotstar[x, y] = (random_color(), random_color(), random_color())
+    sleep(.1)