I am looking to create an attribute table where the first field is a drop-down menu (I have achieved this by using the 'value map' edit widget), but I'm struggling to find a method for the next part;
After the value has been selected from the drop-down menu, I would like the adjacent cell (in the next field) to be automatically populated according to the value in the drop-down menu. So for example; if drop-down value = A, then adjacent field = 1. Or if drop-down value = B, then adjacent field value = 3, etc.
I realise that by using field calculator, it is possible to auto-populate fields as part of a separate process, but I would like to have the fields populated at the same time as the drop-down value is selected if possible.
I am using windows 7 and QGIS version 1.8.