pos/barcodes_generate/views/view_barcode_rule.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (C) 2016-Today: GRAP (http://www.grap.coop)
Copyright (C) 2016-Today GRAP (http://www.lalouve.net)
@author Sylvain LE GAL (https://twitter.com/legalsylvain)
License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-->

<odoo>

    <record id="view_barcode_rule_form" model="ir.ui.view">
        <field name="model">barcode.rule</field>
        <field name="inherit_id" ref="barcodes.view_barcode_rule_form"/>
        <field name="arch" type="xml">
            <field name="pattern" position="after">
                <vbnewline />
                <group string="Barcode Generation" colspan='4' attrs="{'invisible': ['|',
                        ('encoding', '=', 'any'),
                        ('padding', '=', 0)]}">
                    <field name="generate_type"/>
                    <field name="padding" attrs="{'invisible': [('generate_type', '=', 'no')]}"/>
                    <field name="generate_model" attrs="{'invisible': [('generate_type', '=', 'no')]}"/>
                    <vbnewline />
                    <button name="generate_sequence" type="object" string="Generate Sequence" colspan="2"
                        attrs="{'invisible': [('generate_type', '!=', 'sequence')]}"/>
                    <field name="sequence_id" attrs="{'invisible': [('generate_type', '!=', 'sequence')]}"/>
                </group>
            </field>
        </field>
    </record>

</odoo>