how can i add a checkbox or a button to an embedded treeview and fire cutyom python logic?.

tried the following:

<field name="invoice_ids">
<tree create="false" delete="false" default_order="write_date desc">
....
<field name="origin" readonly="True" />
<button name="test_button" string="Test" class="oe_highlight"/>
</tree>
</field>

It adds a button but it does not call any object method.