Clear canvas the right way

command_prompt.py

@@ -41,6 +41,7 @@ class Command_prompt(Label):
 
 
     def draw(self):
+        self.canvas.before.clear()
 
         # background
         with self.canvas.before:

cross.py

@@ -226,12 +226,12 @@ class Cross_painter(Widget):
     def reset(self):
         self.crosses=[]
         self.selected=None
-        self.canvas.clear()
         self.draw()
 
 
     # draw all crosses
     def draw(self):
+        self.canvas.clear()
         with self.canvas:
             for cross in self.crosses:
                 cross.draw()
@@ -270,7 +270,6 @@ class Cross_painter(Widget):
             if touch.button=="left" and self.selected!=None:
                 self.selected.pos=self.check_move(Point(touch.x/Cross.size,touch.y/Cross.size),self.selected)
                 # redraw
-                self.canvas.clear()
                 self.draw()
 
 

status_bar.py

@@ -39,6 +39,5 @@ class Status_bar(Label):
         if self.app.readonly:
             self.raw_text+=" [RO]"
 
-
         # do not wrap
         self.text=self.raw_text[:min(len(self.raw_text),int(self.width/self.char_width))]