+from Renderer import Renderer
+
+from enigma import eCanvas, eRect, gRGB
+
+class Canvas(Renderer):
+ GUI_WIDGET = eCanvas
+
+ def __init__(self):
+ Renderer.__init__(self)
+ self.sequence = None
+ self.draw_count = 0
+
+ def pull_updates(self):
+ if self.instance is None:
+ return
+
+ # do an incremental update
+ list = self.source.drawlist
+ if list is None:
+ return
+
+ # if the lists sequence count changed, re-start from begin
+ if list[0] != self.sequence:
+ self.sequence = list[0]
+ self.draw_count = 0
+
+ self.draw(list[1][self.draw_count:])
+ self.draw_count = len(list[1])
+
+ def draw(self, list):
+ for l in list:
+ print "drawing ..", l
+ self.instance.fillRect(eRect(l[1], l[2], l[3], l[4]), gRGB(l[5]))
+
+ def changed(self, what):
+ self.pull_updates()
+
+ def postWidgetCreate(self, instance):
+ self.sequence = None
+ self.pull_updates()