res_partner_generate_barcode_wizard.xml

<?xml version="1.0"?>
<odoo>
    <!-- Views -->
    <record model="ir.ui.view" id="view_res_partner_generate_barcode_wizard_form">
        <field name="model">res.partner.generate.barcode.wizard</field>
        <field name="arch" type="xml">
            <form>
                <group>
                    <field name="partner_id"/>
                    <field name="current_barcode"/>
                </group>
                <footer>
                    <button string="Generate New Barcode" name="create_new_barcode" type="object" default_focus="1" class="btn-primary"/>
                    <button string="Cancel" class="btn-default" special="cancel"/>
                </footer>
            </form>
        </field>
    </record>

    <!-- Actions -->
    <record model="ir.actions.act_window" id="action_res_partner_generate_barcode_wizard">
        <field name="name">Wizard</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">res.partner.generate.barcode.wizard</field>
        <field name="view_type">form</field>
        <field name="view_mode">form</field>
        <field name="target">new</field>
    </record>
</odoo>