from container import Container
from simple_layout import simple_container_get_preferred_size, \
    simple_container_do_layout

class OverlayContainer(Container):
    """ A container that stretches all its components to fit within its space.
    All of its components must therefore be resizable.
    """

    def get_preferred_size(self, components=None):
        """ Returns the size (width,height) that is preferred for this component.

        Overrides PlotComponent
        """
        return simple_container_get_preferred_size(self, components=components)

    def _do_layout(self):
        """ Actually performs a layout (called by do_layout()).
        """
        simple_container_do_layout(self)
        return