Compute the position of each geometric object
        in concert with the other objects in the panel

def compute_position(self, layout):
        """
        Compute the position of each geometric object
        in concert with the other objects in the panel
        """
        params = self.position.setup_params(self.data)
        data = self.position.setup_data(self.data, params)
        data = self.position.compute_layer(data, params, layout)
        self.data = data