fleet_work_order_route_distance/views/fleet_work_order_views.xml
<?xml version="1.0" encoding="utf-8" ?>
<!-- Copyright 2017 OpenSynergy Indonesia
License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html). -->
<openerp>
<data>
<record id="fleet_work_order_view_form" model="ir.ui.view">
<field name="name">Fleet Work Order Route Distance Form</field>
<field name="model">fleet.work.order</field>
<field name="priority">99</field>
<field
name="inherit_id"
ref="fleet_work_order.fleet_work_order_view_form"
/>
<field name="arch" type="xml">
<xpath expr="//field[@name='distance']" position="replace">
<label for="distance" />
<div>
<field name="distance" class="oe_inline" />
<button
name="button_calc_distance"
string="Calculate"
type="object"
icon="gtk-execute"
class="oe_inline"
/>
</div>
</xpath>
</field>
</record>
</data>
</openerp>