def __init__(self, owner):
        """ Initialize a BoxModel.

        Parameters
        ----------
        owner : string
            A string which uniquely identifies the owner of this box
            model.

        """
        self.left = ConstraintVariable('left')
        self.top = ConstraintVariable('top')
        self.width = ConstraintVariable('width')
        self.height = ConstraintVariable('height')
        self.right = self.left + self.width
        self.bottom = self.top + self.height
        self.v_center = self.top + self.height / 2.0
        self.h_center = self.left + self.width / 2.0
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/layout/box_model.py/BoxModel.__init__/original