Dynamic Price Per Square-Metre Calculation

Ok... so I got a little carried away here... and I have to throw out the disclaimer that we can't really offer this level of support on every forum request, but here is a really solid start on this. You piqued my interest. :P

http://pastie.org/1481851

There are five pieces of this you'll need to update for your form (there are notes in the code itself):

1. The ID specified by the hook
2. Height Input
3. Width Input
4. Price Input
5. Price Per Meter

I used number fields for the height and width and a price field set to the "user defined price" option for the price field. Hope this helps and don't tell my bosses. :)

Think we might have found what's causing total price to remain at zero.

Specifically, function gformGetBasePrice(formId, productFieldId){ has two almost identical instances of the following inside price.js:

//If field is hidden by conditional logic, don't count it for the total
        if(gformIsHidden(productField)){
            price = 0;
        }

and

//If field is hidden by conditional logic, don't count it for the total
        if(gformIsHidden(productField))
            price = 0;

    }

Should price = 0; be changed to price = productField.val(); Will that work?

I know hacking price.js probably isn't the best solution due to upgrades. Would anyone know if this function can be overridden through functions.php?

The total field is a "just for show" field. You can manipulate the total field with javascript all you want, but the submitted value is not used to determine the "real" total of the submission. That is why we use the product field set to user defined price. The value submitted through this field does impact the "real" total of the submission. So, with that said, here is an updated snippet that still uses the user defined price, but hides it with a little CSS, but also uses the total field to provide that information to the user.

http://pastie.org/1487231

Perfect! This is exactly what I need, but I'm not sure what file this code needs to be added to. I know this is outside the realm of "standard" support, but this is incredibly helpful! Thanks.