y: (self.parent.top-self.parent.y) - (self.row) * self.parent.key_size - (self.row - 1) * self.parent.key_sep
x: (self.col - 1) * self.parent.key_size + int(self.col - 1) * self.parent.key_sep + self.pad_col_sep
size_hint: None, None
y: (self.parent.top-self.parent.y) - (self.row) * self.parent.key_size - (self.row - 1) * self.parent.key_sep
x: (self.col - 1) * self.parent.key_size + int(self.col - 1) * self.parent.key_sep + self.pad_col_sep
size_hint: None, None