manager: Introduce shared "system bar"

Providing a status bar for all apps to use allows us to reduce allocations
within the applications.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

wasp/apps/clock.py

@@ -31,16 +31,13 @@ class ClockApp():
     NAME = 'Clock'
     ICON = icons.clock
 
-    def __init__(self):
-        self._bar = wasp.widgets.StatusBar()
-
     def foreground(self):
         """Activate the application.
 
         Configure the status bar, redraw the display and request a periodic
         tick callback every second.
         """
-        self._bar.clock = False
+        wasp.system.bar.clock = False
         self._draw(True)
         wasp.system.request_tick(1000)
 
@@ -82,13 +79,13 @@ class ClockApp():
             draw.rleblit(digits.clock_colon, pos=(2*48, 80), fg=0xb5b6)
 
             # Redraw the status bar
-            self._bar.draw()
+            wasp.system.bar.draw()
         else:
             # The update is doubly lazy... we update the status bar and if
             # the status bus update reports a change in the time of day 
             # then we compare the minute on display to make sure we 
             # only update the main clock once per minute.
-            now = self._bar.update()
+            now = wasp.system.bar.update()
             if not now or self._min == now[4]:
                 # Skip the update
                 return

wasp/apps/fibonacci_clock.py

@@ -61,12 +61,9 @@ class FibonacciClockApp():
     NAME = 'Fibo'
     ICON = icon
 
-    def __init__(self):
-        self._bar = wasp.widgets.StatusBar()
-
     def foreground(self):
         """Activate the application."""
-        self._bar.clock = False
+        wasp.system.bar.clock = False
         self._draw(True)
         wasp.system.request_tick(1000)
 
@@ -86,9 +83,9 @@ class FibonacciClockApp():
         if redraw:
             now = wasp.watch.rtc.get_localtime()
             draw.fill()
-            self._bar.draw()
+            wasp.system.bar.draw()
         else:
-            now = self._bar.update()
+            now = wasp.system.bar.update()
             if not now or self._min == now[4]:
                 return
 

wasp/apps/steps.py

@@ -42,12 +42,12 @@ class StepCounterApp():
 
     def __init__(self):
         watch.accel.reset()
-        self._bar = wasp.widgets.StatusBar()
         self._count = 0
         self._prev_day = -1
 
     def foreground(self):
         """Activate the application."""
+        wasp.system.bar.clock = True
         self._draw()
         wasp.system.request_tick(1000)
 
@@ -62,13 +62,13 @@ class StepCounterApp():
         draw.blit(feet, 12, 132-24)
 
         self._update()
-        self._bar.draw()
+        wasp.system.bar.draw()
 
     def _update(self):
         draw = wasp.watch.drawable
 
         # Update the status bar
-        now = self._bar.update()
+        now = wasp.system.bar.update()
 
         # Reset the step counter if we have move onto the next day
         if now and now[2] != self._prev_day:

wasp/apps/stopwatch.py

@@ -17,12 +17,12 @@ class StopwatchApp():
     ICON = icons.app
 
     def __init__(self):
-        self._bar = wasp.widgets.StatusBar()
         self._reset()
         self._count = 0
 
     def foreground(self):
         """Activate the application."""
+        wasp.system.bar.clock = True
         self._draw()
         wasp.system.request_tick(97)
         wasp.system.request_event(wasp.EventMask.TOUCH |
@@ -111,7 +111,7 @@ class StopwatchApp():
 
         self._last_count = -1
         self._update()
-        self._bar.draw()
+        wasp.system.bar.draw()
         self._draw_splits()
 
     def _update(self):
@@ -125,7 +125,7 @@ class StopwatchApp():
                 self._reset()
 
         # Update the statusbar
-        self._bar.update()
+        wasp.system.bar.update()
 
         if self._last_count != self._count:
             centisecs = self._count

wasp/wasp.py

@@ -100,6 +100,8 @@ class Manager():
     def __init__(self):
         self.app = None
 
+        self.bar = widgets.StatusBar()
+
         self.quick_ring = []
         self.launcher = LauncherApp()
         self.launcher_ring = []