jqGrid setCell calculated value

Question

I need to develop a grid using jqGrid and PHP what has 4 columns: Product, Quantity, Price and Amount. Th

Answer 1

I suppose that you use cell editing. In the case the afterSaveCell callback is really good place to update the calculated column amount based on the current values from the columns quantity and price. The corresponding code could be about the following

afterSaveCell: function (rowid, cellname, value) {
    var quantity, price, $this;
    if (cellname === 'quantity' || cellname === 'price') {
        $this = $(this);
        quantity = parseFloat($this.jqGrid("getCell", rowid, 'quantity'));
        price = parseFloat($this.jqGrid("getCell", rowid, 'price'));
        $this.jqGrid("setCell", rowid, 'amount', quantity * price);
    }
}

The demo do almost the same, but calculate 'total' as the sum of 'amount' and 'tax'. For the test you should modify the value from 'amount' or 'tax' column and verify that 'total' will be recalculated.