ToolsManagement/views/dbtools_tools.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record id="dbtools_tools_view_form" model="ir.ui.view">
        <field name="name">dbtools_tools_form</field>
        <field name="model">dbtools.tools</field>
        <field eval="2" name="priority"/>
        <field name="arch" type="xml">
            <form>
		<header>
    		    <button name="dorental" string="Vermietung durchführen" type="object" class="oe_hightlight"/>
                    <button name="finrental" string="Rücknahme durchführen"  type="object" class="oe_hightlight" enabled="0"/>
            	    <field name="tool_rental_state" widget="statusbar" statusbar_visible="Verfügbar,Vermietet,Reserviert,Gesperrt"/>
		</header>
                <sheet>
		    <div class='row' style='border-size:1px;border-color:#000;'>
  			<div class='col-6'>
			    <div class='row'>
  				<div class='col-10'>
                    		    <group>
                    			<field name="tool_short_name"/>
                    			<field name="tool_long_name"/>
                    			<field name="tool_description"/>
                		    </group>
  				</div>
  			    </div>
			    <hr></hr>
			    <div class='row'>
  				<div class='col-10'>
                    		    <group>
                    			<field name="tool_artikelnummer_intern"/>
                    			<field name="tool_artikelnummer_producer"/>
                    			<field name="tool_producer"/>
                		    </group>
  				</div>
  			    </div>
 			</div>
  			<div class='col-4'>
                    	    <group>
                    		<field name="tool_state"/>
                    		<field name="tool_class"/>
                    		<field name="tool_category"/>
                    		<field name="tool_branch"/>
                	    </group>
 			</div>
                        <notebook>
                    	    <page name="tdata" string="Techn. Daten">
                    	    </page>
                    	    <page name="rental" string="Vermietung">
				<div class='row'>
                 		    <group>
                     		        <field name="tool_rental_state" readonly="0"/>
				    </group>
  				</div>
				<div class='row' attrs="{'invisible': [('tool_rental_state','!=','RT')]}" >
                 		    <group>
                     		        <field name="tool_rental_date" readonly="1"/>
                     		        <field name="tool_rental_partner" readonly="1"/>
                     		        <field name="tool_rental_takedate" readonly="1"/>
                     		        <field name="tool_rental_returndate" readonly="1"/>
				    </group>
  				</div>
				<hr></hr>
				<div class='row'>
  				    <h1>Mietverlauf</h1>
  				</div>
				<hr></hr>
				<field name="tool_rental_history" string="Vermietungshistorie">
        			    <tree string="Werkzeugdokumente" editable="False" create="False">
                			<field name="rental_partner" string="Mieter"/>
                			<field name="rental_takedate" string="Abholung"/>
                			<field name="rental_start" string="Mietbegin"/>
                			<field name="rental_returndate" string="Rückgabe"/>
                			<field name="rental_ende" string="Mietende"/>
				    </tree>			
				</field>
                    	    </page>
                    	    <page name="history" string="Historie">
                    	    </page>
                    	    <page name="documents" string="Dokumente">
				<field name="tool_documents">
        			    <tree string="Werkzeugdokumente">
                			<field name="documentname" string="Dokument"/>
                			<field name="description" string="Beschreibung"/>
                			<field name="documentfile" string="Datei"/>
				    </tree>			
				</field>
                    	    </page>
                    	    <page name="details" string="Details">
                    	    </page>
                    	    <page name="intern" string="Interne Daten">
                    	    </page>
                        </notebook>
  		    </div>
                </sheet>
            </form>
        </field>
    </record>

    <record id="dbtools_tools_view_tree" model="ir.ui.view">
        <field name="name">dbtools_tools_tree</field>
        <field name="model">dbtools.tools</field>
        <field name="priority" eval="16"/>
        <field name="arch" type="xml">
            <tree string="Werkzeuguebersicht">
                 <field name="tool_short_name"/>
                 <field name="tool_description"/>
	    </tree>
        </field>
    </record>

    <record id="action_dbtools_tools_view" model="ir.actions.act_window">
        <field name="name">ToolManagement</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">dbtools.tools</field>
        <field name="view_mode">tree,form</field>
        <field name="context">{}</field>
        <field name="help" type="html">
            <p class="'o_view_nocontent_smiling_face">
                Neues Werkzeug erstellen
            </p>
        </field>
    </record>

</odoo>