add focus strong in combobox

app/commons/forms.py

@@ -315,7 +315,7 @@ class FieldNumeric(QLineEdit):
 
     def value_edited(self, amount):
         self.value_changed = True
-    
+
     def text_changed(self, amount):
         if amount == '':
             return
@@ -343,6 +343,7 @@ class ComboBox(QComboBox):
         self.form = form
         self.setFrame(True)
         self.setObjectName('field_' + key)
+        self.setFocusPolicy(Qt.StrongFocus)
         values = []
         if data.get('values'):
             values = data.get('values')
@@ -377,6 +378,10 @@ class ComboBox(QComboBox):
     def get_value(self):
         return self.get_id()
 
+    def wheelEvent(self, event):
+        if self.hasFocus():
+            super(ComboBox, self).wheelEvent(event)
+
     def get_id(self):
         model = self.model()
         row = self.currentIndex()