jQWidgets Forums

November 14, 2013 at 3:48 pm Obtaining of scroll offset #32650
Participant
Hello Yuri Antipin,
Here is how to get the scroll offset of a grid:
<!DOCTYPE html>
<html lang="en">
<head>
    <link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
    <script type="text/javascript" src="../../scripts/jquery-1.10.2.min.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxcore.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxdata.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxbuttons.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxscrollbar.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxmenu.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxlistbox.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxdropdownlist.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxgrid.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxgrid.selection.js"></script>
    <script type="text/javascript" src="../../scripts/gettheme.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            var theme = "";
            // prepare the data
            var data = new Array();
            var firstNames =
            [
                "Andrew", "Nancy", "Shelley", "Regina", "Yoshi", "Antoni", "Mayumi", "Ian", "Peter", "Lars", "Petra", "Martin", "Sven", "Elio", "Beate", "Cheryl", "Michael", "Guylene"
            ];
            var lastNames =
            [
                "Fuller", "Davolio", "Burke", "Murphy", "Nagase", "Saavedra", "Ohno", "Devling", "Wilson", "Peterson", "Winkler", "Bein", "Petersen", "Rossi", "Vileid", "Saylor", "Bjorn", "Nodier"
            ];
            var productNames =
            [
                "Black Tea", "Green Tea", "Caffe Espresso", "Doubleshot Espresso", "Caffe Latte", "White Chocolate Mocha", "Cramel Latte", "Caffe Americano", "Cappuccino", "Espresso Truffle", "Espresso con Panna", "Peppermint Mocha Twist"
            ];
            var priceValues =
            [
                "2.25", "1.5", "3.0", "3.3", "4.5", "3.6", "3.8", "2.5", "5.0", "1.75", "3.25", "4.0"
            ];
            // generate sample data.
            var generatedata = function (startindex, endindex) {
                var data = {};
                for (var i = startindex; i < endindex; i++) {
                    var row = {};
                    var productindex = Math.floor(Math.random() * productNames.length);
                    var price = parseFloat(priceValues[productindex]);
                    var quantity = 1 + Math.round(Math.random() * 10);
                    row["id"] = i;
                    row["firstname"] = firstNames[Math.floor(Math.random() * firstNames.length)];
                    row["lastname"] = lastNames[Math.floor(Math.random() * lastNames.length)];
                    row["productname"] = productNames[productindex];
                    row["price"] = price;
                    row["quantity"] = quantity;
                    row["total"] = price * quantity;
                    data[i] = row;
                }
                return data;
            }
            var source =
            {
                datatype: "array",
                localdata: {},
                totalrecords: 1000000
            };
            // load virtual data.
            var rendergridrows = function (params) {
                var data = generatedata(params.startindex, params.endindex);
                return data;
            }
            var dataAdapter = new $.jqx.dataAdapter(source);
            $("#jqxgrid").jqxGrid(
            {
                width: 670,
                source: dataAdapter,
                theme: theme,
                virtualmode: true,
                rendergridrows: rendergridrows,
                columns: [
                    { text: 'Id', datafield: 'id', width: 100 },
                    { text: 'First Name', datafield: 'firstname', width: 100 },
                    { text: 'Last Name', datafield: 'lastname', width: 100 },
                    { text: 'Product', datafield: 'productname', width: 180 },
                    { text: 'Quantity', datafield: 'quantity', width: 80, cellsalign: 'right' },
                    { text: 'Unit Price', datafield: 'price', width: 90, cellsalign: 'right', cellsformat: 'c2' },
                    { text: 'Total', datafield: 'total', width: 100, cellsalign: 'right', cellsformat: 'c2' }
                ]
            });
            $("#getVerticalScrollOffset").click(function () {
                var verticalScrollOffset = $("#jqxScrollAreaUpverticalScrollBarjqxgrid").height()
                alert(verticalScrollOffset);
            });
        });
    </script>
</head>
<body class='default'>
    <button id="getVerticalScrollOffset">
        Get vertical scroll offset</button>
    <div id='jqxWidget' style="font-size: 13px; font-family: Verdana; float: left;">
        <div id="jqxgrid">
        </div>
    </div>
</body>
</html>
Note that the id of the element above the scroll thumb is “jqxScrollAreaUpverticalScrollBar” + the id of your grid, in this case “jqxgrid”.
Best Regards,
Dimitar
jQWidgets team
http://www.jqwidgets.com/