:right-sidebar: True

BoolFilter
===================================================================

.. currentmodule:: gi.repository.Gtk





.. class:: BoolFilter(**properties: ~typing.Any)
   :no-contents-entry:


Superclasses: :class:`~gi.repository.Gtk.Filter`, :class:`~gi.repository.GObject.Object`





``GtkBoolFilter`` evaluates a boolean ``GtkExpression``
to determine whether to include items.



Constructors
------------

.. rst-class:: interim-class

.. class:: BoolFilter
   :no-index:


   .. classmethod:: new(expression: ~gi.repository.Gtk.Expression | None = None) -> ~gi.repository.Gtk.BoolFilter

      Creates a new bool filter.







      :param expression: The expression to evaluate









Methods
-------

.. rst-class:: interim-class

.. class:: BoolFilter
   :no-index:


   .. method:: get_expression() -> ~gi.repository.Gtk.Expression | None

      Gets the expression that the filter uses to evaluate if
      an item should be filtered.










   .. method:: get_invert() -> bool

      Returns whether the filter inverts the expression.










   .. method:: set_expression(expression: ~gi.repository.Gtk.Expression | None = None) -> None

      Sets the expression that the filter uses to check if items
      should be filtered.

      The expression must have a value type of :obj:`bool`.







      :param expression: a ``GtkExpression``





   .. method:: set_invert(invert: bool) -> None

      Sets whether the filter should invert the expression.







      :param invert: :const:`True` to invert









Properties
----------

.. rst-class:: interim-class

.. class:: BoolFilter
   :no-index:
   

   .. attribute:: props.expression
      :type: ~gi.repository.Gtk.Expression

      The boolean expression to evaluate on item.







   .. attribute:: props.invert
      :type: bool

      If the expression result should be inverted.