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""" The interface to system metrics (screen width and height etc). """


from traits.api import HasTraits, Int, Interface, List, Tuple


class ISystemMetrics(Interface):
    """ The interface to system metrics (screen width and height etc). """

    # 'ISystemMetrics' interface -------------------------------------------

    #: The width of the main screen in pixels.
    screen_width = Int()

    #: The height of the main screen in pixels.
    screen_height = Int()

    #: The height and width of each screen in pixels
    screen_sizes = List(Tuple(Int, Int))

    #: Background color of a standard dialog window as a tuple of RGB values
    #: between 0.0 and 1.0.
    # FIXME v3: Why isn't this a traits colour?
    dialog_background_color = Tuple()


class MSystemMetrics(HasTraits):
    """ The mixin class that contains common code for toolkit specific
    implementations of the ISystemMetrics interface.
    """