Add Tax include / tax exclude next the prices on product form view

account_usability/models/product.py

@@ -0,0 +1,45 @@
+# Copyright 2015-2021 Akretion (http://www.akretion.com)
+# @author Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models, _
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    # DON'T put store=True on those fields, because they are company dependent
+    sale_price_type = fields.Selection(
+        '_sale_purchase_price_type_sel', compute='_compute_sale_price_type',
+        string='Sale Price Type', compute_sudo=False, readonly=True)
+    purchase_price_type = fields.Selection(
+        '_sale_purchase_price_type_sel', compute='_compute_purchase_price_type',
+        string='Purchase Price Type', compute_sudo=False, readonly=True)
+
+    @api.model
+    def _sale_purchase_price_type_sel(self):
+        return [('incl', _('Tax incl.')), ('excl', _('Tax excl.'))]
+
+    @api.depends('taxes_id')
+    def _compute_sale_price_type(self):
+        for pt in self:
+            sale_price_type = 'incl'
+            if pt.taxes_id and all([not t.price_include for t in pt.taxes_id if t.amount_type == 'percent']):
+                sale_price_type = 'excl'
+            pt.sale_price_type = sale_price_type
+
+    @api.depends('supplier_taxes_id')
+    def _compute_purchase_price_type(self):
+        for pt in self:
+            purchase_price_type = 'incl'
+            if pt.supplier_taxes_id and all([not t.price_include for t in pt.supplier_taxes_id if t.amount_type == 'percent']):
+                purchase_price_type = 'excl'
+            pt.purchase_price_type = purchase_price_type
+
+
+class ProductSupplierinfo(models.Model):
+    _inherit = 'product.supplierinfo'
+
+    # DON'T put store=True on those fields, because they are company dependent
+    purchase_price_type = fields.Selection(
+        related='product_tmpl_id.purchase_price_type', related_sudo=False)