egrid.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxcheckbox.js"></script>
    <script type="text/javascript" src="../../scripts/demos.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            // prepare the data
            var employees = [{ "EmployeeID": 1, "FirstName": "Nancy", "LastName": "Davolio", "ReportsTo": 2, "Country": "USA", "Title": "Sales Representative", "HireDate": "1992-05-01 00:00:00", "BirthDate": "1948-12-08 00:00:00", "City": "Seattle", "Address": "507 - 20th Ave. E.Apt. 2A" }, { "EmployeeID": 2, "FirstName": "Andrew", "LastName": "Fuller", "ReportsTo": null, "Country": "USA", "Title": "Vice President, Sales", "HireDate": "1992-08-14 00:00:00", "BirthDate": "1952-02-19 00:00:00", "City": "Tacoma", "Address": "908 W. Capital Way" }, { "EmployeeID": 3, "FirstName": "Janet", "LastName": "Leverling", "ReportsTo": 2, "Country": "USA", "Title": "Sales Representative", "HireDate": "1992-04-01 00:00:00", "BirthDate": "1963-08-30 00:00:00", "City": "Kirkland", "Address": "722 Moss Bay Blvd." }, { "EmployeeID": 4, "FirstName": "Margaret", "LastName": "Peacock", "ReportsTo": 2, "Country": "USA", "Title": "Sales Representative", "HireDate": "1993-05-03 00:00:00", "BirthDate": "1937-09-19 00:00:00", "City": "Redmond", "Address": "4110 Old Redmond Rd." }, { "EmployeeID": 5, "FirstName": "Steven", "LastName": "Buchanan", "ReportsTo": 2, "Country": "UK", "Title": "Sales Manager", "HireDate": "1993-10-17 00:00:00", "BirthDate": "1955-03-04 00:00:00", "City": "London", "Address": "14 Garrett Hill" }, { "EmployeeID": 6, "FirstName": "Michael", "LastName": "Suyama", "ReportsTo": 5, "Country": "UK", "Title": "Sales Representative", "HireDate": "1993-10-17 00:00:00", "BirthDate": "1963-07-02 00:00:00", "City": "London", "Address": "Coventry House Miner Rd." }, { "EmployeeID": 7, "FirstName": "Robert", "LastName": "King", "ReportsTo": 5, "Country": "UK", "Title": "Sales Representative", "HireDate": "1994-01-02 00:00:00", "BirthDate": "1960-05-29 00:00:00", "City": "London", "Address": "Edgeham Hollow Winchester Way" }, { "EmployeeID": 8, "FirstName": "Laura", "LastName": "Callahan", "ReportsTo": 2, "Country": "USA", "Title": "Inside Sales Coordinator", "HireDate": "1994-03-05 00:00:00", "BirthDate": "1958-01-09 00:00:00", "City": "Seattle", "Address": "4726 - 11th Ave. N.E." }, { "EmployeeID": 9, "FirstName": "Anne", "LastName": "Dodsworth", "ReportsTo": 5, "Country": "UK", "Title": "Sales Representative", "HireDate": "1994-11-15 00:00:00", "BirthDate": "1966-01-27 00:00:00", "City": "London", "Address": "7 Houndstooth Rd." }];

            //// prepare the data
            var source =
            {
                dataType: "json",
                dataFields: [
                    { name: 'EmployeeID', type: 'number' },
                    { name: 'ReportsTo', type: 'number' },
                    { name: 'FirstName', type: 'string' },
                    { name: 'LastName', type: 'string' },
                    { name: 'Country', type: 'string' },
                    { name: 'City', type: 'string' },
                    { name: 'Address', type: 'string' },
                    { name: 'Title', type: 'string' },
                    { name: 'HireDate', type: 'date' },
                    { name: 'BirthDate', type: 'date' }
                ],
                hierarchy:
                {
                    keyDataField: { name: 'EmployeeID' },
                    parentDataField: { name: 'ReportsTo' }
                },
                id: 'EmployeeID',
                localData: employees
            };

            var dataAdapter = new $.jqx.dataAdapter(source);
            // create Tree Grid
            $("#treeGrid").jqxTreeGrid(
            {
                width: 600,
                source: dataAdapter,
                ready: function () {
                    // expand row with 'EmployeeKey = 2'
                    $("#treeGrid").jqxTreeGrid('expandRow', 2);
                },
                columns: [
                  { text: 'First Name', dataField: 'FirstName', minWidth: 100, width: 200 },
                  { text: 'Last Name', dataField: 'LastName', width: 200 },
                  { text: 'City', dataField: 'City' }
                ]
            });

            // create buttons, listbox and the columns chooser dropdownlist.
            $("#applyFilter").jqxButton();
            $("#clearfilter").jqxButton();
            $("#filterbox").jqxListBox({ checkboxes: true, width: 160, height: 250 });
            $("#columnchooser").jqxDropDownList({
                autoDropDownHeight: true, selectedIndex: 0, width: 160, height: 25,
                source: [{ label: 'First Name', value: 'FirstName' },
                  { label: 'Last Name', value: 'LastName' },
                  { label: 'City', value: 'City' }
                ]
            });

            // updates the listbox with unique records depending on the selected column.
            var updateFilterBox = function (dataField) {
                $("#treeGrid").jqxTreeGrid('clearFilters');
                var filterBoxAdapter = new $.jqx.dataAdapter(source,
                {
                    uniqueDataFields: [dataField],
                    async: false,
                    autoBind: true
                });
                var uniqueRecords = filterBoxAdapter.records;
                uniqueRecords.splice(0, 0, '(Select All)');
                $("#filterbox").jqxListBox({ source: uniqueRecords, displayMember: dataField });
                $("#filterbox").jqxListBox('checkAll');
            }

            updateFilterBox('FirstName');

            // handle select all item.
            var handleCheckChange = true;
            $("#filterbox").on('checkChange', function (event) {
                if (!handleCheckChange)
                    return;
                                 
                if (event.args.label != '(Select All)') {
                    // update the state of the "Select All" listbox item.

                    handleCheckChange = false;
                    $("#filterbox").jqxListBox('checkIndex', 0);
                    var checkedItems = $("#filterbox").jqxListBox('getCheckedItems');
                    var items = $("#filterbox").jqxListBox('getItems');

                    if (checkedItems.length == 1) {
                        $("#filterbox").jqxListBox('uncheckIndex', 0);
                    }
                    else if (items.length != checkedItems.length) {
                        $("#filterbox").jqxListBox('indeterminateIndex', 0);
                    }
                    handleCheckChange = true;
                }
                else {
                    // check/uncheck all items if "Select All" is clicked.
                    handleCheckChange = false;
                    if (event.args.checked) {
                        $("#filterbox").jqxListBox('checkAll');
                    }
                    else {
                        $("#filterbox").jqxListBox('uncheckAll');
                    }

                    handleCheckChange = true;
                }
            });

            // handle columns selection.
            $("#columnchooser").on('select', function (event) {
                updateFilterBox(event.args.item.value);
            });

            // builds and applies the filter.
            var applyFilter = function (dataField) {
                $("#treeGrid").jqxTreeGrid('clearFilters');
                var filtertype = 'stringfilter';
         
                // create a new group of filters.
                var filtergroup = new $.jqx.filter();
                // get listbox's checked items.
                var checkedItems = $("#filterbox").jqxListBox('getCheckedItems');
                if (checkedItems.length == 0) {
                    var filter_or_operator = 1;
                    var filtervalue = "Empty";
                    var filtercondition = 'equal';
                    var filter = filtergroup.createfilter(filtertype, filtervalue, filtercondition);
                    filtergroup.addfilter(filter_or_operator, filter);
                }
                else {
                    for (var i = 0; i < checkedItems.length; i++) {
                        var filter_or_operator = 1;
                        // set filter's value.
                        var filtervalue = checkedItems[i].label;
                        // set filter's condition.
                        var filtercondition = 'equal';
                        // create new filter.
                        var filter = filtergroup.createfilter(filtertype, filtervalue, filtercondition);
                        // add the filter to the filter group.
                        filtergroup.addfilter(filter_or_operator, filter);
                    }
                }

                // add the filters.
                $("#treeGrid").jqxTreeGrid('addFilter', dataField, filtergroup);
                // apply the filters.
                $("#treeGrid").jqxTreeGrid('applyFilters');
            }

            // clears the filter.
            $("#clearfilter").click(function () {
                $("#treeGrid").jqxTreeGrid('clearFilters');
            });

            // applies the filter.
            $("#applyFilter").click(function () {
                var dataField = $("#columnchooser").jqxDropDownList('getSelectedItem').value;
                applyFilter(dataField);
            });
        });
    </script>
</head>
<body class='default'>
    <div id='jqxWidget' style="float: left;">
        <div style="float: left">
            <div>Filter By:</div>
            <div id="columnchooser"></div>
            <div style="margin-top: 10px;" id="filterbox"></div>
            <div style="margin-top: 10px;">
                <input type="button" id="applyFilter" value="Apply Filter" />
                <input type="button" id="clearfilter" value="Clear Filter" />
            </div>
        </div>
        <div style="margin-left: 20px; float: left" id="treeGrid">
        </div>
    </div>
</body>
</html>