Rubar parameters: prohibit simultaneous selection of REGIME=1 and CONDAM=0

src/View/SolverParameters/RubarForm.py

@@ -199,6 +199,12 @@ class RubarForm(QWidget):
 
     def apply_pending(self):
         """Commit focused text before Ctrl+S; leave invalid drafts visible."""
+        values = self.values()
+        if (values.get('rubarbe_condam') == '0' and
+                values.get('rubarbe_regime') == '1'):
+            self.tabs.setCurrentIndex(1)
+            self.editors['rubarbe_condam'].setFocus()
+            return False
         for key, editor in self.editors.items():
             if (isinstance(editor, QLineEdit) and editor.isModified() and
                     active(self.descriptions[key], self.values())):
@@ -220,6 +226,13 @@ class RubarForm(QWidget):
         value = self._validated(key, value)
         if value is None:
             return False
+        values = self.values()
+        values[key] = value
+        if (key in ('rubarbe_condam', 'rubarbe_regime') and
+                values.get('rubarbe_condam') == '0' and
+                values.get('rubarbe_regime') == '1'):
+            self.refresh()
+            return False
         if isinstance(self.editors[key], QLineEdit):
             self.editors[key].setModified(False)
         if self.values()[key] != value:
@@ -270,6 +283,16 @@ class RubarForm(QWidget):
             self.errors[key].setVisible(
                 enabled and bool(self.errors[key].text()))
         self._update_context(values)
+        for key, forbidden, blocked in (
+            ('rubarbe_regime', '1', values.get('rubarbe_condam') == '0'),
+            ('rubarbe_condam', '0', values.get('rubarbe_regime') == '1'),
+        ):
+            editor = self.editors.get(key)
+            if editor is None:
+                continue
+            index = editor.findData(forbidden)
+            if index >= 0:
+                editor.model().item(index).setEnabled(not blocked)
         self._refreshing = False
 
     def _update_context(self, values):