from tuikit.core.coords import Point, Size

class Widget:

    """Base class for all widgets."""

    _num_instances = 0

    def __init__(self):

        #: Widget name is used for logging etc. Not visible anywhere.

        self._num_instances += 1

        self.name = '{}{}'.format(

            self.__class__.__name__,

            self._num_instances)

        #: Parent Widget

        self.parent = None

        #: Window owning this Widget

        self.window = None

        ### placing and size

        #: Position inside parent widget. Modified by layout manager.

        self.pos = Point()

        #: Actual size. Modified by layout manager.

        self.size = Size(10, 10)

        #: Requested size. Layout manager will use this when placing the widget.

        self.sizereq = Size(1, 1)

        #: Minimal size of widget. Widget will never be sized smaller than this.

        self.sizemin = Size(1, 1)

        #: Maximum size of widget. Widget will never be sized bigger than this.

        #: None means no maximum size (infinite).

        self.sizemax = Size(None, None)

    ## placing and size ##

    @property

    def x(self):

        return self.pos.x

    @property

    def y(self):

        return self.pos.y

    @property

    def width(self):

        return self.size.w

    @property

    def height(self):

        return self.size.h

    ## drawing ##

    def draw(self, buffer, x, y):

        pass