tra_backend/mks_delivery/views/project_task_view.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
        <record id="project_task_view_zone" model="ir.ui.view">
            <field name="name">project.task.view.zone</field>
            <field name="model">project.task</field>
            <field name="inherit_id" ref="industry_fsm.project_task_view_form"/>
            <field name="arch" type="xml">
            <xpath expr="//sheet" position='before'>
				<header>
				    <button name="action_assign" type="object"  string="Assigned" states="unassigned" class="oe_highlight"  />
				    <button name="action_accept" type="object"  string="Accept" states="assigned" class="oe_highlight"  />
				    <button name="action_start" type="object"  string="Start" states="accepted,issue" class="oe_highlight"  />
				    <button name="action_delivery" type="object"  string="Delivered" states="started" class="oe_highlight"  />
                    <button name="action_collect" type="object"  string="Collected" states="started" class="oe_highlight"  />
				    <button name="action_cancel" type="object"  string="Cancel" states="started,issue" class="oe_highlight"  />
				    <button name="action_issue" type="object"  string="Issue" states="started" class="oe_highlight"  />
				    
				    <button name="action_paid" type="object"  string="Paid" states="delivered" class="oe_highlight"  />
				    <button name="action_non_paid" type="object"  string="Non Paid" states="delivered" class="oe_highlight"  />
				    
				    
				    
				    <field name="state" widget="statusbar" statusbar_visible="unassigned,assigned,accepted,started,delivered"/>
			    </header>
            </xpath>
            
             <xpath expr="//field[@name='project_id']" position="after">
                    <field name="zone_id" />
            </xpath>
            <!-- <xpath expr="//field[@name='name']" position="replace">
                    <field name="name" string="Sale Order Number" />
            </xpath>
            <xpath expr="//field[@name='project_id']" position="attributes">
                <attribute name="invisible">1</attribute>
            </xpath> -->
            </field>
        </record>
        
<!--        search view-->
         <record id="project_task_Service_search" model="ir.ui.view">
            <field name="name">project.task.Service.search</field>
            <field name="model">project.task</field>
            <field name="inherit_id" ref="industry_fsm.project_task_view_search_fsm"/>
            <field name="arch" type="xml">
             
            <xpath expr="//field[@name='partner_id']" position="after">
                <field name="zone_id" />
                <field name="state" />
            </xpath>
            <xpath expr="//filter[@name='groupby_stage']" position="replace"/>
            <xpath expr="//filter[@name='groupby_project']" position="replace"/>
            
            <xpath expr="//filter[@name='groupby_company']" position="after">
                <filter string="Zone" name="zone_id" context="{'group_by':'zone_id'}" />
                <filter string="Status" name="state" context="{'group_by':'state'}"/>
            </xpath>
             <xpath expr="//filter[@name='planned_future']" position="after">
                <separator/>
                <filter string="Unassigned" name="unassigned" domain="[('state','=','unassigned')]"/>
                <filter string="Assigned" name="assigned" domain="[('state','=','assigned')]"/>
                <filter string="Accepted" name="accepted" domain="[('state','=','accepted')]"/>
                <filter string="Started" name="started" domain="[('state','=','started')]"/>
                <filter string="Delivered" name="delivered" domain="[('state','=','delivered')]"/>
                <filter string="Cancel" name="cancel" domain="[('state','=','cancel')]"/>
                <filter string="Issue" name="cancel" domain="[('state','=','issue')]"/>
                <filter string="Paid" name="paid" domain="[('state','=','paid')]"/>
                <filter string="Non Paid" name="non_paid" domain="[('state','=','non_paid')]"/>
                
                
            </xpath>
            </field>
        </record>
<!--        tree vies-->
        <record id="project_task_list_view" model="ir.ui.view">
            <field name="name">project.task.list.view</field>
            <field name="model">project.task</field>
            <field name="inherit_id" ref="industry_fsm.project_task_view_list_fsm"/>
            <field name="arch" type="xml">
            
            <xpath expr="//tree" position="replace">
                <tree string="Tasks" decoration-danger="state=='cancel'" decoration-info="state=='assigned'"
                                                         decoration-success="state=='delivered'"  
                                                         decoration-warning="state=='issue'"  
                                                         decoration-primary="state=='started'" >
                
                    <field name="name" string="Sale Order Number"/>
                    <field name="partner_id" />
                    <field name="zone_id" />
                    <field name="partner_phone" />
                    <field name="partner_email" />
                    <field name="user_id" invisible="context.get('user_invisible', False)"/>
                    <field name="planned_date_begin"/>
                    <field name="planned_date_end"/>
                    <field name="state"/>
                </tree>
            </xpath>
            
            </field>
        </record>
        
</odoo>