[processing] added some extra info in modeler calculator

volaya · volaya · commit 1bf3be5a432e · 2014-07-12T10:39:51.000+02:00
diff --git a/python/plugins/processing/modeler/CalculatorModelerAlgorithm.py b/python/plugins/processing/modeler/CalculatorModelerAlgorithm.py
@@ -85,9 +85,12 @@ def setupUi(self):
         text = ('You can refer to model values in you formula, using'
                 'single-letter variables, as follows:\n')
         ichar = 97
-        for number in numbers:
-            text += chr(ichar) + '->' + self.resolveValueDescription(number) + '\n'
-            ichar += 1
+        if numbers:
+            for number in numbers:
+                text += chr(ichar) + '->' + self.resolveValueDescription(number) + '\n'
+                ichar += 1
+        else:
+            text += "\n - No numerical variables are available."
         self.infoText.setText(text)
         self.infoText.setEnabled(False)
         self.formulaText = QtGui.QLineEdit()
