From 1f2c25a7bdd1ff9ffeb15adfe4c9ab4c41a519be Mon Sep 17 00:00:00 2001
From: Daniel Thompson <daniel@redfelineninja.org.uk>
Date: Mon, 3 Feb 2020 22:35:16 +0000
Subject: wasp: clock: Add a simple battery meter


diff --git a/wasp/boards/pinetime/manifest.py b/wasp/boards/pinetime/manifest.py
index 58cd241..d292ba4 100644
--- a/wasp/boards/pinetime/manifest.py
+++ b/wasp/boards/pinetime/manifest.py
@@ -9,9 +9,11 @@ freeze('../..',
         'drivers/st7789.py',
         'drivers/vibrator.py',
         'fonts.py',
+        'icons.py',
         'main.py',
         'manager.py',
         'logo.py',
+        'widgets.py',
     ),
     opt=3
 )
diff --git a/wasp/clock.py b/wasp/clock.py
index 95ea7da..a19398e 100644
--- a/wasp/clock.py
+++ b/wasp/clock.py
@@ -1,4 +1,5 @@
 import fonts
+import widgets
 
 DIGITS = (
         fonts.clock_0,
@@ -17,6 +18,7 @@ class ClockApp(object):
 
     def __init__(self):
         self.on_screen = ( -1, -1 )
+        self.meter = widgets.BatteryMeter()
 
     def draw(self, watch):
         display = watch.display
@@ -24,12 +26,13 @@ class ClockApp(object):
         display.fill(0)
         display.rleblit(fonts.clock_colon, pos=(2*48, 80), fg=0xb5b6)
         self.update(watch)
+        self.meter.draw()
+
 
     def update(self, watch):
         now = watch.rtc.get_time()
         if now[0] == self.on_screen[0] and now[1] == self.on_screen[1]:
-            # Avoid the redraw
-            return False
+            self.meter.update()
 
         display = watch.display
         display.rleblit(DIGITS[now[1]  % 10], pos=(4*48, 80))
@@ -38,6 +41,4 @@ class ClockApp(object):
         display.rleblit(DIGITS[now[0] // 10], pos=(0*48, 80), fg=0xc638)
         self.on_screen = now
 
-        return True
-
-
+        self.meter.update()
diff --git a/wasp/icons.py b/wasp/icons.py
new file mode 100644
index 0000000..409a3d6
--- /dev/null
+++ b/wasp/icons.py
@@ -0,0 +1,3 @@
+# 1-bit RLE, generated from res/battery.png, 189 bytes
+battery = (36, 48, b'\x97\x0e\x14\x12\x11\x14\x10\x14\x0c\x08\x0c\x08\x08\x08\x0c\x08\x08\x08\x0c\x08\x08\x08\x0c\x08\x08\x04\x14\x04\x08\x04\x14\x04\x08\x04\x0c\x04\x04\x04\x08\x04\x0b\x05\x04\x04\x08\x04\n\x06\x04\x04\x08\x04\t\x07\x04\x04\x08\x04\x08\x07\x05\x04\x08\x04\x07\x07\x06\x04\x08\x04\x06\x07\x07\x04\x08\x04\x05\x07\x08\x04\x08\x04\x04\x0e\x02\x04\x08\x04\x03\x0f\x02\x04\x08\x04\x02\x10\x02\x04\x08\x04\x02\x10\x02\x04\x08\x04\x02\x0f\x03\x04\x08\x04\x02\x0e\x04\x04\x08\x04\x08\x07\x05\x04\x08\x04\x07\x07\x06\x04\x08\x04\x06\x07\x07\x04\x08\x04\x05\x07\x08\x04\x08\x04\x04\x07\t\x04\x08\x04\x04\x06\n\x04\x08\x04\x04\x05\x0b\x04\x08\x04\x04\x04\x0c\x04\x08\x04\x14\x04\x08\x04\x14\x04\x08\x04\x14\x04\x08\x04\x14\x04\x08\x1c\x08\x1c\x08\x1c\x08\x1c\x98')
+
diff --git a/wasp/widgets.py b/wasp/widgets.py
new file mode 100644
index 0000000..90e98ea
--- /dev/null
+++ b/wasp/widgets.py
@@ -0,0 +1,48 @@
+import icons
+import watch
+
+class BatteryMeter(object):
+    def __init__(self):
+        self.level = None
+
+    def draw(self):
+        display = watch.display
+        icon = icons.battery
+
+        watch.display.rleblit(icon, pos=(239-icon[0], 0), fg=0x7bef)
+        self.level = -1
+        self.update()
+        
+    def update(self):
+        if watch.battery.charging():
+            if self.level != -1:
+                icon = icons.battery
+                watch.display.rleblit(icon, pos=(239-icon[0], 0), fg=0x7bef)
+                self.level = -1
+        else:
+            level = watch.battery.level()
+            if level == self.level:
+                return
+            self.level = level
+            x = 239 - 31
+            w = 18
+
+            # Use the level to work out the correct height
+            if level == 100:
+                h = 26
+            else:
+                h = level // 4
+
+            # Use the level to figure out the right color
+            if level > 96:
+                rgb = 0x07e0
+            else:
+                green = level // 3
+                red = 31-green
+                rgb = (red << 11) + (green << 6)
+
+            if 26 - h:
+                watch.display.fill(0, x, 13, 18, 26 - h)
+            if h:
+                watch.display.fill(rgb, x, 39 - h, 18, h)
+
-- 
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