Merge pull request #18 from prcutler/root-group-fix

Update to use root_group for CP 9 compatibility

Author: dhalbert

README.rst

@@ -82,7 +82,7 @@ Usage Example
 
     # Make the display context
     splash = displayio.Group()
-    display.show(splash)
+    display.root_group = splash
 
     color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
     color_palette = displayio.Palette(1)

examples/displayio_sh1107_game_of_life.py

@@ -109,7 +109,7 @@ def conway(output):
 tg2 = displayio.TileGrid(b2, pixel_shader=palette)
 g1 = displayio.Group(scale=SCALE)
 g1.append(tg1)
-display.show(g1)
+display.root_group = g1
 g2 = displayio.Group(scale=SCALE)
 g2.append(tg2)
 
@@ -126,7 +126,7 @@ def conway(output):
     # values, 400 frames seems like a good number.  Working in this way, with
     # two bitmaps, reduces copying data and makes the animation a bit faster
     for _ in range(n):
-        display.show(g1)
+        display.root_group = g1
         apply_life_rule(b1, b2)
         display.show(g2)
         apply_life_rule(b2, b1)

examples/displayio_sh1107_mono_128x128_test.py

@@ -43,7 +43,7 @@
 
 # Make the display context
 splash = displayio.Group()
-display.show(splash)
+display.root_group = splash
 
 color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
 color_palette = displayio.Palette(1)

examples/displayio_sh1107_random_motion.py

@@ -35,7 +35,7 @@
 
 # Make the display context
 splash = displayio.Group()
-display.show(splash)
+display.root_group = splash
 
 color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
 color_palette = displayio.Palette(1)

examples/displayio_sh1107_simpletest.py

@@ -36,7 +36,7 @@
 
 # Make the display context
 splash = displayio.Group()
-display.show(splash)
+display.root_group = splash
 
 color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
 color_palette = displayio.Palette(1)