# Source code for enaml.widgets.bounded_datetime

    #------------------------------------------------------------------------------
    # Copyright (c) 2013-2025, Nucleic Development Team.
    #
    # Distributed under the terms of the Modified BSD License.
    #
    # The full license is in the file LICENSE, distributed with this software.
    #------------------------------------------------------------------------------
    from datetime import datetime as pydatetime

    from atom.api import Typed, ForwardTyped

    from enaml.core.declarative import d_, observe

    from .control import Control, ProxyControl

    class ProxyBoundedDatetime(ProxyControl):
        """ The abstract definition of a proxy BoundedDate object.

        """
        #: A reference to the BoundedDatetime declaration.
        declaration = ForwardTyped(lambda: BoundedDatetime)

        def set_minimum(self, minimum):
            raise NotImplementedError

        def set_maximum(self, maximum):
            raise NotImplementedError

        def set_datetime(self, datetime):
            raise NotImplementedError

    class BoundedDatetime(Control):
        """ A base class for use with widgets that edit a Python
        datetime.datetime object bounded between minimum and maximum
        values. This class is not meant to be used directly.

        """
        #: The minimum datetime available in the datetime edit. If not
        #: defined then the default value is midnight September 14, 1752.
        minimum = d_(Typed(pydatetime, args=(1752, 9, 14, 0, 0, 0, 0)))

        #: The maximum datetime available in the datetime edit. If not
        #: defined then the default value is the second before midnight
        #: December 31, 7999.
        maximum = d_(Typed(pydatetime, args=(7999, 12, 31, 23, 59, 59, 999000)))

        #: The currently selected date. Default is datetime.now(). The
        #: value is bounded between :attr:`minimum` and :attr:`maximum`.
        datetime = d_(Typed(pydatetime, factory=pydatetime.now))

        #: A reference to the ProxyBoundedDatetime object.
        proxy = Typed(ProxyBoundedDatetime)

        #--------------------------------------------------------------------------
        # Observers
        #--------------------------------------------------------------------------
        @observe('minimum', 'maximum', 'datetime')
        def _update_proxy(self, change):
            """ An observer which updates the proxy when the data changes.

            """
            # The superclass implementation is sufficient.
            super(BoundedDatetime, self)._update_proxy(change)

        #--------------------------------------------------------------------------
        # Post Setattr Handlers
        #--------------------------------------------------------------------------
        def _post_setattr_minimum(self, old, new):
            """ Post setattr the minimum datetime.

            If the new minimum is greater than the current value or the
            maximum, those values are adjusted up.

            """
            if new > self.maximum:
                self.maximum = new
            if new > self.datetime:
                self.datetime = new

        def _post_setattr_maximum(self, old, new):
            """ Post setattr the maximum datetime.

            If the new maximum is less than the current value or the
            minimum, those values are adjusted down.

            """
            if new < self.minimum:
                self.minimum = new
            if new < self.datetime:
                self.datetime = new

        #--------------------------------------------------------------------------
        # Post Validate Handlers
        #--------------------------------------------------------------------------
        def _post_validate_datetime(self, old, new):
            """ Post validate the datetime for the control.

            If it lies outside of minimum and maximum bounds, it will be
            clipped to the bounds.

            """
            return max(self.minimum, min(new, self.maximum))