Added new examples; off, half, white, max,setall (#77)

* Added new examples; off, half, white, max,setall
* Union Jack example added
* Union jack fixed indexes, reduced white brightness
* Added vertical scroll animation
* Tidyup, show moved out of inner loop, delay increased
* Arg check corrected, arg decode simplified, brightness default to None
* Brightness set to 1.0 for maximum illumination
* Added 8 colour and 8 colour fade variants of solid_colours.py
* Compliance with flake8

Co-authored-by: druck <RPi-X@druck.org.uk>
Co-authored-by: druck <RPi-F@druck.org.uk>
Co-authored-by: Philip Howard <phil@pimoroni.com>

Author: 4 people

examples/half.py

@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+
+import blinkt
+
+blinkt.set_clear_on_exit(False)
+blinkt.set_all(255, 255, 255, 0.5)
+blinkt.show()

examples/max.py

@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+
+import blinkt
+
+blinkt.set_clear_on_exit(False)
+blinkt.set_all(255, 255, 255, 1.0)
+blinkt.show()

examples/off.py

@@ -0,0 +1,6 @@
+#!/usr/bin/env python
+
+import blinkt
+
+blinkt.clear()
+blinkt.show()

examples/setall.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+import sys
+from sys import argv
+import blinkt
+
+if len(argv) < 4 or len(argv) > 5:
+    sys.stderr.write("Syntax: {0} <red> <green> <blue> [brightness]\n".format(argv[0]))
+    exit(1)
+
+red = int(argv[1])
+green = int(argv[2])
+blue = int(argv[3])
+bright = float(argv[4]) if len(argv) > 4 else None
+
+blinkt.set_clear_on_exit(False)
+blinkt.set_all(red, green, blue, bright)
+blinkt.show()

examples/solid_colours2.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+import time
+
+import blinkt
+
+
+blinkt.set_clear_on_exit()
+
+step = 0
+
+while True:
+    if step == 0:
+        blinkt.set_all(128, 0, 0)
+    elif step == 1:
+        blinkt.set_all(0, 128, 0)
+    elif step == 2:
+        blinkt.set_all(128, 128, 0)
+    elif step == 3:
+        blinkt.set_all(0, 0, 128)
+    elif step == 4:
+        blinkt.set_all(128, 0, 128)
+    elif step == 5:
+        blinkt.set_all(0, 128, 128)
+    elif step == 6:
+        blinkt.set_all(128, 128, 128)
+
+    step += 1
+    step %= 7
+    blinkt.show()
+    time.sleep(0.5)

examples/solid_colours3.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import time
+
+import blinkt
+
+
+blinkt.set_clear_on_exit()
+
+step = 0
+
+while True:
+    for i in range(0, 128):
+        j = 128 - i
+        if step == 0:
+            blinkt.set_all(128, j, j)
+        elif step == 1:
+            blinkt.set_all(j, i, 0)
+        elif step == 2:
+            blinkt.set_all(i, 128, 0)
+        elif step == 3:
+            blinkt.set_all(j, j, i)
+        elif step == 4:
+            blinkt.set_all(i, 0, 128)
+        elif step == 5:
+            blinkt.set_all(j, i, 128)
+        elif step == 6:
+            blinkt.set_all(i, 128, 128)
+        blinkt.show()
+        time.sleep(0.01)
+
+    step += 1
+    step %= 7
+    time.sleep(0.5)

examples/unionjack.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+
+import time
+import blinkt
+
+RED__ = (255, 0, 0)
+WHITE = (127, 127, 127)
+BLUE_ = (0, 0, 255)
+
+pattern = [
+    [RED__, BLUE_, WHITE, RED__, RED__, WHITE, BLUE_, RED__],
+    [BLUE_, RED__, WHITE, RED__, RED__, WHITE, RED__, BLUE_],
+    [WHITE, WHITE, WHITE, RED__, RED__, WHITE, WHITE, WHITE],
+    [RED__, RED__, RED__, RED__, RED__, RED__, RED__, RED__],
+    [RED__, RED__, RED__, RED__, RED__, RED__, RED__, RED__],
+    [WHITE, WHITE, WHITE, RED__, RED__, WHITE, WHITE, WHITE],
+    [BLUE_, RED__, WHITE, RED__, RED__, WHITE, RED__, BLUE_],
+    [RED__, BLUE_, WHITE, RED__, RED__, WHITE, BLUE_, RED__],
+]
+
+blinkt.set_clear_on_exit()
+blinkt.set_brightness(0.1)
+
+while 1:
+    for line in pattern:
+        for i, pixel in enumerate(line):
+            r, g, b = pixel
+            blinkt.set_pixel(i, r, g, b)
+        blinkt.show()
+        time.sleep(0.25)

examples/white.py

@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+
+import blinkt
+
+blinkt.set_clear_on_exit(False)
+blinkt.set_all(255, 255, 255, 1.0)
+blinkt.show()