dependent upon 4 variables

Hi

Using datatables Editor I have succeeded in writing dependent code for a stock entry system, on selection of a stock the share price is written to the price field.

On entry of the quantity the total is evaluated for each keystroke

on entering the quantity the total is evaluated shown below

the function below updates the total on any change to the share_price and/or quantity

    siteEditor.dependent( ['dm_holdings.quantity', 'dm_holdings.price'], function ( val, data, callback ) {
        
        var stock_id = Number(siteEditor.field('dm_holdings.stock_id').val());
        var quantity = Number(siteEditor.field('dm_holdings.quantity').val());
        var total;
        
        share_price = Number(siteEditor.field('dm_holdings.price').val());
        
        total = share_price * quantity / 100;                       
        siteEditor.set('dm_holdings.total', (total));
    },{event: 'change keyup'} );

I need to allow entry of the total resulting in the quantity being evaluated based upon the share_price

Is there a way to check the current field being edited and then set values dependent upon the field being edited i.e.

if editing quantity field, assign total (total = share_price * quantity / 100;)
if editing total field, assign quantity (quantity = 100 * total / share_price;)

this is my attempt at the code change to the above shown below, it may require the logic above to work !!

    siteEditor.dependent( ['dm_holdings.quantity', 'dm_holdings.price', 'dm_holdings.total'], function ( val, data, callback ) {
        
        var stock_id = Number(siteEditor.field('dm_holdings.stock_id').val());
        var quantity = Number(siteEditor.field('dm_holdings.quantity').val());
        var total = Number(siteEditor.field('dm_holdings.total').val());
        
        share_price = Number(siteEditor.field('dm_holdings.price').val());
        
        quantity = 100 * total / share_price;
        total = share_price * quantity / 100;                       
        siteEditor.set('dm_holdings.quantity', (quantity));
        siteEditor.set('dm_holdings.total', (total));
    },{event: 'change keyup'} );

the above code prevents me entering the total, deleting the characters as they are entered, and thus the quantity is not evaluated based upon the value of total and ```share_price``

any help appreciated.

as usual I can provide access to my system to test if required,

Many Thanks

Colin