mark selected in cross object

cross.py

@@ -21,8 +21,14 @@ class Cross():
         self.pos.y=y
 
     def draw(self,**kwargs):
-        # override color
+        # set color
-        Color(*(kwargs.get("color",self.color)))
+        if not self.selected:
+            Color(*self.color)
+        else:
+            (r,g,b)=self.color
+            # darken selected
+            Color(r/2,g/2,b/2)
+
         Rectangle(pos=((self.pos.x-1.5)*self.size,(self.pos.y-0.5)*self.size),size=(3*self.size,self.size))
         Rectangle(pos=((self.pos.x-0.5)*self.size,(self.pos.y-1.5)*self.size),size=(self.size,3*self.size))
 
@@ -235,13 +241,7 @@ class Cross_painter(Widget):
         self.canvas.clear()
         with self.canvas:
             for cross in self.crosses:
-                if cross!=self.selected:
                 cross.draw()
-                # color selected
-                else:
-                    (r,g,b)=cross.color
-                    # darken
-                    cross.draw(color=(r/2,g/2,b/2))
 
 
     # respond to mouse down
@@ -259,8 +259,14 @@ class Cross_painter(Widget):
 
             # select cross
             if touch.button=="left":
+                # unselect
+                if self.selected!=None:
+                    self.selected.selected=False
+
                 # select cross under touch
                 self.selected=self.find_cross(Point(touch.x/Cross.size,touch.y/Cross.size))
+                if self.selected!=None:
+                    self.selected.selected=True
                 self.draw()