Dynamic background again

mopidy_touchscreen/dynamic_background.py

@@ -0,0 +1,39 @@
+import random
+
+
+class DynamicBackground():
+    def __init__(self):
+        self.current = get_valid_color()
+        self.target = get_valid_color()
+
+    def draw_background(self, surface):
+        same = True
+        for x in range(0, 3):
+            if self.current[x] > self.target[x]:
+                self.current[x] -= 1
+            elif self.current[x] < self.target[x]:
+                self.current[x] += 1
+            if self.current != self.target:
+                same = False
+        if same:
+            self.target = get_valid_color()
+        surface.fill(self.current)
+
+
+# Returns an array with 3 integers in range of 0-255
+# The sum of the three integers will be lower than 255*2
+# (510) to avoid very bright colors
+# White text should be seen ok with this background color
+
+
+def get_valid_color():
+    color = [0, 0, 0]
+    total = 0
+    for i in range(0, 3):
+        color[i] = random.randint(0, 255)
+        total += color[i]
+    extra = total - 510
+    if extra > 0:
+        i = random.randint(0, 2)
+        color[i] -= extra
+    return color

mopidy_touchscreen/screen_manager.py

@@ -12,7 +12,7 @@ from .screen_objects import ScreenObjectsManager, \
     TouchAndTextItem
 from .input_manager import InputManager
 from .tracklist import Tracklist
-
+from .dynamic_background import DynamicBackground
 
 logger = logging.getLogger(__name__)
 
@@ -29,6 +29,7 @@ class ScreenManager():
         self.size = size
         self.core = core
         self.fonts = {}
+        self.background = DynamicBackground()
         self.current_screen = 0
         self.base_size = self.size[1] / 8
         font = resource_filename(
@@ -112,7 +113,7 @@ class ScreenManager():
 
     def update(self):
         surface = pygame.Surface(self.size)
-        surface.fill([200, 200, 200])
+        self.background.draw_background(surface)
         self.screens[self.current_screen].update(surface,
                                                  self.screen_changed)
         surface.blit(self.down_bar, (0, self.base_size * 7))