def road_type_postprocessor():
    """Get road-type parameter for postprocessing.

    :return: A list of boolean parameter.
    :rtype: list
    """
    road_type = BooleanParameter()
    road_type.name = tr('Road type')
    road_type.value = True
    road_type.description = tr(
        'Check this option to enable reporting break down by road type.'
    )

    return [road_type]

def default_gender_postprocessor():
    """Get gender postprocessor selector.

    :return: A selector to activate gender postprocessor.
    :rtype: list
    """
    gender = BooleanParameter()
    gender.name = 'Gender'
    gender.value = True
    gender.description = tr(
        'Check this option if you wish to calculate the gender breakdown '
        'on the affected population.'
    )
    return [gender]

def default_gender_postprocessor():
    """Get gender postprocessor selector.

    :return: A selector to activate gender postprocessor.
    :rtype: list
    """
    gender = BooleanParameter()
    gender.name = "Gender"
    gender.value = True
    gender.help_text = tr("Gender ratio breakdown.")
    gender.description = tr(
        "Check this option if you wish to calculate a breakdown by gender " "for the affected population."
    )
    return [gender]

def age_postprocessor():
    """Get age postprocessor selectors.

    :return: Selectors to activate age postprocessor.
    :rtype: list
    """
    age = BooleanParameter()
    age.name = 'Age'
    age.value = True

    youth_ratio = FloatParameter()
    youth_ratio.name = 'Youth ratio'
    youth_ratio.value = get_defaults('YOUTH_RATIO')
    youth_ratio.description = tr(
        'Youth ratio defines what proportion of the population have not yet '
        'achieved financial independence. The age threshold for youth can '
        'vary by region - please consult with your local census bureau to find'
        'out what the relevant threshold is in your region. InaSAFE does not '
        'impose a particular age ratio scheme - it will break down the '
        'population according to the thresholds you define for your locality.'
    )

    adult_ratio = FloatParameter()
    adult_ratio.name = 'Adult ratio'
    adult_ratio.value = get_defaults('ADULT_RATIO')
    adult_ratio.description = tr(
        'Adult ratio defines what proportion of the population have '
        'passed into adulthood and are not yet aged. The age threshold for '
        'adults can vary by region - please consult with your local census '
        'bureau to find out what the relevant threshold is in your region. '
        'InaSAFE does not impose a particular age ratio scheme - it will '
        'break down the population according to the thresholds you define for '
        'your locality.'
    )

    elderly_ratio = FloatParameter()
    elderly_ratio.name = 'Elderly ratio'
    elderly_ratio.value = get_defaults('ELDERLY_RATIO')
    elderly_ratio.description = tr(
        'Elderly ratio defines what proportion of the population have '
        'passed from adulthood into their later life stage.  The age '
        'threshold for being considered elderly can vary by region - please '
        'consult with your local census bureau to find out what the relevant '
        'threshold is in your region. InaSAFE does not impose a particular '
        'age ratio scheme - it will break down the population according to '
        'the thresholds you define for your locality.'
    )

    return [age, youth_ratio, adult_ratio, elderly_ratio]

def building_type_postprocessor():
    """Get building-type parameter for postprocessing.

    :return: A list of boolean parameter.
    :rtype: list
    """
    building_type = BooleanParameter()
    building_type.name = tr('Building type')
    building_type.value = True
    building_type.description = tr(
        'Check this option if you want to enable a building impact report'
        'broken down by building type for each aggregation area.'
    )

    return [building_type]

def minimum_needs_selector():
    """Get minimum needs postprocessor selector.

    :return: A selector to activate minimum needs postprocessor.
    :rtype: list
    """
    minimum_needs_flag = BooleanParameter()
    minimum_needs_flag.name = 'MinimumNeeds'
    minimum_needs_flag.value = True
    minimum_needs_flag.description = tr(
        'Check this option if you wish to calculate minimum needs for the '
        'affected population. Minimum needs will be calculated according to '
        'the defaults defined in the minimum needs configuration tool.'
    )
    return [minimum_needs_flag]

def building_type_postprocessor():
    """Get building-type parameter for postprocessing.

    :return: Selectors to activate building breakdown postprocessor.
    :rtype: list
    """
    building_type = BooleanParameter()
    building_type.name = tr("Building type")
    building_type.value = True
    building_type.description = tr(
        "Check this option if you want to enable a building impact report "
        "broken down by building type for each aggregation area."
    )

    return [building_type]

def road_type_postprocessor():
    """Get road-type parameter for postprocessing.

    :return: A list of boolean parameter.
    :rtype: list
    """
    road_type = BooleanParameter()
    road_type.name = tr("Road type")
    road_type.value = True
    road_type.help_text = tr("Road breakdown by type.")
    road_type.description = tr(
        "Check this option if you want to enable a road impact report broken " "down by road type."
    )

    return [road_type]

def aggregation_categorical_postprocessor():
    """Get aggregation categorical postprocessor selectors.

    :return: List of boolean parameter.
    :rtype: list
    """
    aggregation_categorical = BooleanParameter()
    aggregation_categorical.name = tr('Aggregation categorical')
    aggregation_categorical.value = True
    aggregation_categorical.description = tr(
        'Enable the aggregation by categories. For example if you have '
        'roads classified by type, you will get a breakdown by type of roads'
        'per aggregation area.'
    )

    return [aggregation_categorical]

def minimum_needs_selector():
    """Get minimum needs postprocessor selector.

    :return: A selector to activate minimum needs postprocessor.
    :rtype: list
    """
    minimum_needs_flag = BooleanParameter()
    minimum_needs_flag.name = "MinimumNeeds"
    minimum_needs_flag.value = True
    minimum_needs_flag.help_text = tr("Minimum needs breakdown.")
    minimum_needs_flag.description = tr(
        "Check this option if you wish to calculate minimum needs for the "
        "affected population. Minimum needs will be calculated according to "
        "the defaults defined in the minimum needs configuration tool."
    )
    return [minimum_needs_flag]

    def test_init(self):
        """Test initialize qt4 parameter factory."""

        boolean_parameter = BooleanParameter('1231231')
        boolean_parameter.name = 'Boolean'
        boolean_parameter.help_text = 'A boolean parameter'
        boolean_parameter.description = 'A test _description'
        boolean_parameter.is_required = True
        boolean_parameter.value = True

        float_parameter = FloatParameter()
        float_parameter.name = 'Float Parameter'
        float_parameter.is_required = True
        float_parameter.precision = 3
        float_parameter.minimum_allowed_value = 1.0
        float_parameter.maximum_allowed_value = 2.0
        float_parameter.help_text = 'Short help.'
        float_parameter.description = 'Long description for parameter.'
        float_parameter.unit = 'metres'
        float_parameter.value = 1.1

        parameters = [boolean_parameter, float_parameter]

        qt4_parameter_factory = Qt4ParameterFactory()
        widgets = []
        widget_classes = []

        for parameter in parameters:
            widget = qt4_parameter_factory.get_widget(parameter)
            widgets.append(widget)
            widget_classes.append(widget.__class__)

        expected_classes = [BooleanParameterWidget, FloatParameterWidget]
        message = 'Expected %s got %s' % (expected_classes, widget_classes)
        self.assertListEqual(widget_classes, expected_classes, message)

    def test_init(self):
        parameter = BooleanParameter('1231231')
        parameter.name = 'Boolean'
        parameter.help_text = 'A boolean parameter'
        parameter.description = 'A test _description'
        parameter.is_required = True

        parameter.value = True

        widget = BooleanParameterWidget(parameter)

        expected_value = parameter.name
        real_value = widget._label.text()
        message = 'Expected %s get %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        expected_value = parameter.value
        real_value = widget._check_box_input.isChecked()
        message = 'Expected %s get %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        # change value
        widget._check_box_input.setChecked(False)

        expected_value = False
        real_value = widget._check_box_input.isChecked()
        message = 'Expected %s get %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

    def test_boolean(self):
        """Test a bool parameter works properly.

        .. versionadded:: 2.2

        """
        parameter = BooleanParameter('1231231')
        parameter.name = 'Boolean'
        parameter.help_text = 'A boolean parameter'
        parameter.description = 'A test _description'
        parameter.is_required = True

        parameter.value = True
        self.assertEqual(True, parameter.value)

        with self.assertRaises(TypeError):
            parameter.value = 'Test'

    def test_build_widget(self):
        dialog = FunctionOptionsDialog()

        # Define threshold
        threshold = InputListParameter()
        threshold.name = 'Thresholds [m]'
        threshold.is_required = True
        threshold.element_type = float
        threshold.expected_type = list
        threshold.ordering = InputListParameter.AscendingOrder
        threshold.minimum_item_count = 1
        threshold.maximum_item_count = 3
        threshold.value = [2.3]  # default value

        value = dialog.build_widget(dialog.configLayout, 'foo', threshold)
        widget = dialog.findChild(QLineEdit)
        add_button = dialog.findChildren(QPushButton)[0]
        remove_button = dialog.findChildren(QPushButton)[1]
        list_widget = dialog.findChild(QListWidget)

        # initial value must be same with default
        expected_value = [2.3]
        real_value = value().value
        message = 'Expected %s but got %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        # change to 5.9
        # select 2.3 list item
        self.click_list_widget_item(list_widget, '2.3')
        # remove 2.3 list item
        remove_button.click()
        # typing 5.9
        widget.setText('5.9')
        # add it to list
        add_button.click()
        expected_value = [5.9]
        real_value = value().value
        message = 'Expected %s but got %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        # add 70
        widget.setText('70')
        # add it to list
        add_button.click()
        expected_value = [5.9, 70]
        real_value = value().value
        message = 'Expected %s but got %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        widget.setText('bar')
        self.assertEqual('bar', widget.text())

        def trigger_error(error):
            message = 'Expected %s type but got %s' % (
                ValueError, type(error))
            self.assertIsInstance(error, ValueError, message)

        threshold.add_row_error_handler = trigger_error
        add_button.click()

        bool_param = BooleanParameter()
        bool_param.name = 'boolean checkbox'
        bool_param.value = True

        dialog = FunctionOptionsDialog()
        value = dialog.build_widget(dialog.configLayout, 'foo', bool_param)
        widget = dialog.findChild(QCheckBox)

        # initial value must be same with default
        expected_value = True
        real_value = value().value
        message = 'Expected %s but got %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        widget.setChecked(False)
        expected_value = False
        real_value = value().value
        message = 'Expected %s but got %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        dict_param = DictParameter()
        dict_param.name = 'Dictionary tree'
        dict_param.element_type = int
        dict_param.value = {'a': 1, 'b': 2}
        dialog = FunctionOptionsDialog()
        value = dialog.build_widget(dialog.configLayout, 'foo', dict_param)
        widget = dialog.findChild(QTreeWidget)

        # initial value must be same with default
        expected_value = {'a': 1, 'b': 2}
        real_value = value().value
        message = 'Expected %s but got %s' % (expected_value, real_value)
        self.assertEqual(expected_value, real_value, message)

        expected_value = {'a': 2, 'b': 1}
        # get tree items
        tree_items = widget.invisibleRootItem()
        # set the input
        tree_items.child(0).setText(1, str(2))
        tree_items.child(1).setText(1, str(1))
#.........这里部分代码省略.........

def building_type_field():
    field = BooleanParameter()
    field.name = 'Building Type Field'
    field.is_required = True
    field.value = True
    return field