[IMP] mrp_bom_version: Show in tree buttons draft, activate, new version, and historical. Create _copy_bom, _update_bom_state_after_copy functions.

[ADD] mrp_bom_new_version_when_component_change: Create a new version of BoM when are you going to change a component.

mrp_bom_version/models/mrp_bom.py

@@ -83,16 +83,8 @@ class MrpBom(models.Model):
     @api.multi
     def button_new_version(self):
         self.ensure_one()
-        new_bom = self.copy({
-            'version': self.version + 1,
-            'active': True,
-            'parent_bom': self.id,
-        })
-        self.write({
-            'active': False,
-            'state': 'historical',
-            'historical_date': fields.Date.today(),
-        })
+        new_bom = self._copy_bom()
+        self._update_bom_state_after_copy()
         return {
             'type': 'ir.actions.act_window',
             'view_type': 'form, tree',
@@ -102,6 +94,21 @@ class MrpBom(models.Model):
             'target': 'new',
         }
 
+    def _copy_bom(self):
+        new_bom = self.copy({
+            'version': self.version + 1,
+            'active': True,
+            'parent_bom': self.id,
+        })
+        return new_bom
+
+    def _update_bom_state_after_copy(self):
+        self.write({
+            'active': False,
+            'state': 'historical',
+            'historical_date': fields.Date.today(),
+        })
+
     @api.one
     def button_activate(self):
         self.write({

mrp_bom_version/views/mrp_bom_view.xml

@@ -26,6 +26,29 @@
                     <field name="version" />
                     <field name="state" />
                     <field name="historical_date"/>
+                    <button name="button_draft"
+                            type="object"
+                            string="Draft"
+                            groups="mrp_bom_version.group_mrp_bom_version"
+                            attrs="{'invisible':[('state','!=','active')]}"
+                            icon="terp-document-new" />
+                    <button name="button_activate"
+                            type="object" string="Activate"
+                            attrs="{'invisible':[('state','not in',(False, 'draft'))]}"
+                            icon="terp-camera_test"
+                            confirm="You will activate the BoM. If you haven't set a route yet, then you won't be able to do it after this. Are you sure you want to proceed?"/>
+                    <button name="button_new_version"
+                            type="object"
+                            string="New version"
+                            attrs="{'invisible':[('state','==','historical')]}"
+                            icon="gtk-execute"
+                            confirm="You are going to create a new version of this BoM. Are you sure?"/>
+                    <button name="button_historical"
+                            type="object"
+                            string="Historical"
+                            attrs="{'invisible':[('state','!=','active')]}"
+                            icon="gtk-convert"     
+                            confirm="You are going to historize an BoM. Doing, not be able to unlock it unless you make a copy. Are you sure you want to proceed?"/>
                 </field>
             </field>
         </record>