From 824ea757854179c3d8064bb1d4fea95f7875e5ec Mon Sep 17 00:00:00 2001
From: janion <erik_@hotmail.co.uk>
Date: Fri, 21 Sep 2018 17:07:37 +0100
Subject: [PATCH] Added a colour picker for the neopixels

Shows a colour palette from which to select a colour
---
 colourPicker/main.py | 86 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 colourPicker/main.py

diff --git a/colourPicker/main.py b/colourPicker/main.py
new file mode 100644
index 0000000..a84cc53
--- /dev/null
+++ b/colourPicker/main.py
@@ -0,0 +1,86 @@
+"""Colour picker to show on neopixels"""
+
+___name___         = "ColourPicker"
+___title___        = "Colour Picker"
+___license___      = "MIT"
+___dependencies___ = ["ugfx_helper"]
+___categories___   = ["LEDs"]
+
+import ugfx, ugfx_helper, app
+from tilda import Buttons
+from time import sleep
+from machine import Neopix
+
+def getColour(intensity, angle):
+    intensity *= 2
+    if angle < (1 / 6):
+        return (intensity, intensity * (angle * 6), 0) if intensity < 1 else (1, (angle * 6) + ((1 - (angle * 6)) * (intensity - 1)), (intensity - 1))
+    elif angle < (2 / 6):
+        return (intensity * (2 - (6 * angle)), intensity, 0) if intensity < 1 else ((2 - (6 * angle)) + ((1 - (2 - (6 * angle))) * (intensity - 1)), 1, (intensity - 1))
+    elif angle < (3 / 6):
+        return (0, intensity, intensity * ((6 * angle) - 2)) if intensity < 1 else ((intensity - 1), 1, ((6 * angle) - 2) + ((1 - ((6 * angle) - 2)) * (intensity - 1)))
+    elif angle < (4 / 6):
+        return (0, intensity * (4 - (6 * angle)), intensity) if intensity < 1 else ((intensity - 1), (4 - (6 * angle)) + ((1 - (4 - (6 * angle))) * (intensity - 1)), 1)
+    elif angle < (5 / 6):
+        return (intensity * ((6 * angle) - 4), 0, intensity) if intensity < 1 else (((6 * angle) - 4) + ((1 - ((6 * angle) - 4)) * (intensity - 1)), (intensity - 1), 1)
+    else:
+        return (intensity, 0, intensity * 6 * (1 - angle)) if intensity < 1 else (1, (intensity - 1), (6 * (1 - angle)) + ((1 - (6 * (1 - angle))) * (intensity - 1)))
+
+
+ugfx_helper.init()
+ugfx.clear()
+
+maxHeight = ugfx.height()
+n = Neopix()
+
+# Draw colour swatch
+for x in range(ugfx.width()):
+    intensity = x / ugfx.width()
+    for y in range(maxHeight):
+        (r, g, b) = getColour(intensity, y / ugfx.height())
+        colour = (int(31 * r) << 11) + (int(63 * g) << 5) + int(31 * b)
+        ugfx.area(x, y, 1, 1, colour)
+
+
+i = 0
+j = 0
+ugfx.area((i - 1) if i > 0 else 0, (j - 1) if j > 0 else 0, 3 if (i > 0 and i < (ugfx.width() - 1)) else 2, 3 if (j > 0 and j < (maxHeight - 1)) else 2, ugfx.WHITE)
+while (not Buttons.is_pressed(Buttons.BTN_A)) and (not Buttons.is_pressed(Buttons.BTN_B)) and (not Buttons.is_pressed(Buttons.BTN_Menu)):
+    changed = False
+    oldI = i
+    oldJ = j
+
+    if Buttons.is_pressed(Buttons.JOY_Right) and (i < (ugfx.width() - 1)):
+        i += 1
+        changed = True
+    elif Buttons.is_pressed(Buttons.JOY_Left) and (i > 0):
+        i -= 1
+        changed = True
+        
+    if Buttons.is_pressed(Buttons.JOY_Down) and (j < (maxHeight - 1)):
+        j += 1
+        changed = True
+    elif Buttons.is_pressed(Buttons.JOY_Up) and (j > 0):
+        j -= 1
+        changed = True
+        
+    if changed:
+        (r, g, b) = getColour(i / ugfx.width(), j / ugfx.height())
+        colour = (int(255 * r) << 16) + (int(255 * g) << 8) + int(255 * b)
+        n.display([colour, colour])
+        
+        
+        for xx in range((oldI - 1) if (oldI > 0) else 0, 1 + ((oldI + 1) if (oldI < (ugfx.width() - 2)) else (ugfx.width() - 1))):
+            intensity = xx / ugfx.width()
+            for yy in range((oldJ - 1) if (oldJ > 0) else 0, 1 + ((oldJ + 1) if (oldJ < (maxHeight - 2)) else (maxHeight - 1))):
+                (rr, gg, bb) = getColour(intensity, yy / ugfx.height())
+                colour = (int(31 * rr) << 11) + (int(63 * gg) << 5) + int(31 * bb)
+                ugfx.area(xx, yy, 1, 1, colour)
+
+        ugfx.area((i - 1) if i > 0 else 0, (j - 1) if j > 0 else 0, 3 if (i > 0 and i < (ugfx.width() - 1)) else 2, 3 if (j > 0 and j < (maxHeight - 1)) else 2, ugfx.WHITE)
+        
+        
+    sleep(0.05)
+
+ugfx.clear()
+app.restart_to_default()