How to use the horizon.forms function in horizon

PROJECT_USER_MEMBER_SLUG = "update_members"
PROJECT_GROUP_MEMBER_SLUG = "update_group_members"
COMMON_HORIZONTAL_TEMPLATE = "identity/projects/_common_horizontal_form.html"


class ProjectQuotaAction(workflows.Action):
    ifcb_label = _("Injected File Content (Bytes)")
    metadata_items = forms.IntegerField(min_value=-1,
                                        label=_("Metadata Items"))
    cores = forms.IntegerField(min_value=-1, label=_("VCPUs"))
    instances = forms.IntegerField(min_value=-1, label=_("Instances"))
    injected_files = forms.IntegerField(min_value=-1,
                                        label=_("Injected Files"))
    injected_file_content_bytes = forms.IntegerField(min_value=-1,
                                                     label=ifcb_label)
    volumes = forms.IntegerField(min_value=-1, label=_("Volumes"))
    snapshots = forms.IntegerField(min_value=-1, label=_("Volume Snapshots"))
    gigabytes = forms.IntegerField(
        min_value=-1, label=_("Total Size of Volumes and Snapshots (GB)"))
    ram = forms.IntegerField(min_value=-1, label=_("RAM (MB)"))
    floating_ips = forms.IntegerField(min_value=-1, label=_("Floating IPs"))
    fixed_ips = forms.IntegerField(min_value=-1, label=_("Fixed IPs"))
    security_groups = forms.IntegerField(min_value=-1,
                                         label=_("Security Groups"))
    security_group_rules = forms.IntegerField(min_value=-1,
                                              label=_("Security Group Rules"))

    # Neutron
    security_group = forms.IntegerField(min_value=-1,
                                        label=_("Security Groups"))
    security_group_rule = forms.IntegerField(min_value=-1,
                                             label=_("Security Group Rules"))

def __init__(self, request, *args, **kwargs):
        super(JobExecutionGeneralConfigAction, self).__init__(request,
                                                              *args,
                                                              **kwargs)

        if request.REQUEST.get("job_id", None) is None:
            self.fields["job"] = forms.ChoiceField(
                label=_("Job"))
            self.fields["job"].choices = self.populate_job_choices(request)
        else:
            self.fields["job"] = forms.CharField(
                widget=forms.HiddenInput(),
                initial=request.REQUEST.get("job_id", None))

choices=source_choices,
        widget=forms.Select(attrs={
            'class': 'switchable',
            'data-slug': 'scriptsource'}))
    script_help = _("A script or set of python commands to modify rating "
                    "calculations.")
    script_upload = forms.FileField(
        label=_('Script File'),
        help_text=script_help,
        widget=forms.FileInput(attrs={
            'class': 'switched',
            'data-required-when-shown': 'true',
            'data-switch-on': 'scriptsource',
            'data-scriptsource-file': _('Script File')}),
        required=False)
    script_data = forms.CharField(
        label=_('Script Data'),
        help_text=script_help,
        widget=forms.widgets.Textarea(attrs={
            'class': 'switched',
            'data-required-when-shown': 'true',
            'data-switch-on': 'scriptsource',
            'data-scriptsource-raw': _('Script Data')}),
        required=False)

    class Meta(object):
        name = _('Create Script')

    def clean(self):
        cleaned = super(CreateScriptForm, self).clean()

        files = self.request.FILES

class Meta(object):
        name = _("Libs")
        help_text_template = (
            "project/data_processing.jobs/_create_job_libs_help.html")


class GeneralConfigAction(workflows.Action):
    job_name = forms.CharField(label=_("Name"))

    job_type = forms.ChoiceField(label=_("Job Type"),
                                 widget=forms.Select(attrs={
                                     'class': 'switchable',
                                     'data-slug': 'jobtype'
                                 }))

    main_binary = forms.DynamicChoiceField(
        label=_("Choose a main binary"),
        required=False,
        help_text=_("Choose the binary which "
                    "should be used in this Job."),
        add_item_link=JOB_BINARY_CREATE_URL,
        widget=fields.DynamicSelectWidget(
            attrs={
                'class': 'switched',
                'data-switch-on': 'jobtype',
                'data-jobtype-pig': _("Choose a main binary"),
                'data-jobtype-hive': _("Choose a main binary"),
                'data-jobtype-shell': _("Choose a shell script"),
                'data-jobtype-spark': _("Choose a main binary"),
                'data-jobtype-mapreduce.streaming': _("Choose a main binary")
            }))

"""
    def __init__(self, *args, **kwargs):
        kwargs['mask'] = True
        super(RuleCIDRField, self).__init__(*args, **kwargs)

    def validate(self, value):
        keywords = ['any', 'external']
        if value in keywords:
            self.ip = value
        else:
            if '/' not in value:
                raise ValidationError(_("Input must be in CIDR format"))
            super(RuleCIDRField, self).validate(value)


class AddRouterRule(forms.SelfHandlingForm):
    source = RuleCIDRField(label=_("Source CIDR"),
                                  widget=forms.TextInput(), required=True)
    destination = RuleCIDRField(label=_("Destination CIDR"),
                                  widget=forms.TextInput(), required=True)
    action = forms.ChoiceField(label=_("Action"), required=True)
    nexthops = forms.MultiIPField(label=_("Optional: Next Hop "
                                       "Addresses (comma delimited)"),
                               widget=forms.TextInput(), required=False)
    router_id = forms.CharField(label=_("Router ID"),
                                widget=forms.TextInput(attrs={'readonly':
                                                              'readonly'}))
    failure_url = 'horizon:project:routers:detail'

    def __init__(self, request, *args, **kwargs):
        super(AddRouterRule, self).__init__(request, *args, **kwargs)
        self.fields['action'].choices = [('permit', _('Permit')),

def __init__(self, request, *args, **kwargs):
        super(CreateProjectInfoAction, self).__init__(request,
                                                      *args,
                                                      **kwargs)
        readonlyInput = forms.TextInput(attrs={'readonly': 'readonly'})
        self.fields["domain_id"].widget = readonlyInput
        self.fields["domain_name"].widget = readonlyInput
        self.add_extra_fields()

    @sensitive_variables('data')
    def handle(self, request, data):
        try:
            data.pop('confirm_password')
            security_service = manila.security_service_create(
                request, **data)
            messages.success(request, _('Successfully created security '
                                        'service: %s') % data['name'])
            return security_service
        except Exception:
            exceptions.handle(request,
                              _('Unable to create security service.'))
            return False


class Update(forms.SelfHandlingForm):
    name = forms.CharField(max_length="255", label=_("Share Name"))
    description = forms.CharField(
        widget=forms.Textarea, label=_("Description"), required=False)

    def handle(self, request, data):
        sec_service_id = self.initial['sec_service_id']
        try:
            manila.security_service_update(request, sec_service_id,
                                           name=data['name'],
                                           description=data['description'])

            message = _('Successfully updated security service '
                        '"%s"') % data['name']
            messages.success(request, message)
            return True
        except Exception:

class AddIPSecPolicyAction(workflows.Action):
    name = forms.CharField(max_length=80, label=_("Name"), required=False)
    description = forms.CharField(
        initial="", required=False,
        max_length=80, label=_("Description"))
    auth_algorithm = forms.ChoiceField(label=_("Authorization algorithm"),
                                       required=False)
    encapsulation_mode = forms.ChoiceField(label=_("Encapsulation mode"),
                                           required=False)
    encryption_algorithm = forms.ChoiceField(label=_("Encryption algorithm"),
                                             required=False)
    lifetime_units = forms.ChoiceField(label=_("Lifetime units"),
                                       required=False)
    lifetime_value = forms.IntegerField(
        min_value=60, label=_("Lifetime value for IKE keys "),
        initial=3600,
        help_text=_("Equal to or greater than 60"),
        required=False)
    pfs = forms.ChoiceField(label=_("Perfect Forward Secrecy"), required=False)
    transform_protocol = forms.ChoiceField(label=_("Transform Protocol"),
                                           required=False)

    def __init__(self, request, *args, **kwargs):
        super(AddIPSecPolicyAction, self).__init__(request, *args, **kwargs)

        auth_algorithm_choices = [("sha1", "sha1")]
        self.fields['auth_algorithm'].choices = auth_algorithm_choices
        # Currently this field has only one choice, so mark it as readonly.
        self.fields['auth_algorithm'].widget.attrs['readonly'] = True

flavor = api.nova.flavor_create(request,
                                            data['name'],
                                            data['memory_mb'],
                                            data['vcpus'],
                                            data['disk_gb'],
                                            ephemeral=data['eph_gb'],
                                            swap=data['swap_mb'])
            msg = _('Created flavor "%s".') % data['name']
            messages.success(request, msg)
            return flavor
        except:
            exceptions.handle(request, _("Unable to create flavor."))


class EditFlavor(CreateFlavor):
    flavor_id = forms.CharField(widget=forms.widgets.HiddenInput)

    def clean_name(self):
        return self.cleaned_data['name']

    def clean(self):
        cleaned_data = super(EditFlavor, self).clean()
        name = cleaned_data.get('name')
        flavor_id = cleaned_data.get('flavor_id')
        try:
            flavors = api.nova.flavor_list(self.request)
        except:
            flavors = []
            msg = _('Unable to get flavor list')
            exceptions.check_message(["Connection", "refused"], msg)
            raise
        # Check if there is no flavor with the same name