size: 2 * self.parent.width - 2 * self.parent.line_width, self.parent.height - key_label.font_size
<Screen>:
+ canvas:
+ Color:
+ rgba: 229/255, 228/255, 226/255, 1
+ Rectangle:
+ pos: 0, 0
+ size: self.width, self.height
+
key_size: int( (3 * self.width - 16) / 56)
key_sep: int( self.key_size / 24)
key_pad_sep: int( self.key_size / 7) + 1