from .layout import Layout

class GridLayout(Layout):

    """Lay out widgets in a grid.

    Grid size is determined by each widget's specified column and row.

    """

    def __init__(self):

        Layout.__init__(self)

    def add(self, widget, row, column):

        Layout.add(self, widget)

    def update(self):

        for widget in self._managed_widgets:

            widget.resize(*widget.sizereq)

            widget.pos.update(*(widget.posreq + self.offset))