Uncaught Reference Error: - Angular, Vue, React, Web Components, Javascript, HTML5 Widgets

Tagged: expand, expandItem, item, jqxtree, json, select, selectItem, Tree

This topic contains 1 reply, has 2 voices, and was last updated by Dimitar 12 years, 1 month ago.

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Uncaught Reference Error: Posts

August 23, 2012 at 2:26 pm Uncaught Reference Error: #7055

wwhalen

Member

Hi,

I am building a tree from a json string and I am getting Uncaught ReferenceError: treeItem is not defined.

source = json string.

var dataAdapter = new $.jqx.dataAdapter(source);
dataAdapter.dataBind();
var records = dataAdapter.getRecordsHierarchy(‘id’, ‘parentid’, ‘items’, [{ name: ‘text’, map: ‘label’}]);
$(‘#jqxWidgetTree’).jqxTree({ source: records, width: ‘250px’, theme: theme });

I can’t seem to get rid of the error and I am trying to expand one of the nodes and select an element.

$(‘#jqxWidgetTree’).jqxTree(‘expandItem’, element);
$(‘#jqxWidgetTree’).jqxTree(‘selectItem’, element);

I am having trouble figuring out what the element var needs to look like to make this happen.

Any suggestions would be greatly appreciated.

Thanks,

August 24, 2012 at 7:41 am Uncaught Reference Error: #7092

Dimitar

Participant

Hello wwhalen,

Here is an example in which there is a JSON tree. By clicking two buttons you can either expand the first element or expand a selected element.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title id='Description'>In this demo the jqxTree is built from JSON data.</title>
    <link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
    <script type="text/javascript" src="../../scripts/gettheme.js"></script>
    <script type="text/javascript" src="../scripts/jquery-1.7.2.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/jqxpanel.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxtree.js"></script>
</head>
<body>
    <div id='content'>
        <script type="text/javascript">
            $(document).ready(function () {
                var theme = getTheme();
                var data = [
                { "id": "2",
                    "parentid": "1",
                    "text": "Hot Chocolate"
                }, {
                    "id": "3",
                    "parentid": "1",
                    "text": "Peppermint Hot Chocolate"
                }, {
                    "id": "4",
                    "parentid": "1",
                    "text": "Salted Caramel Hot Chocolate"
                }, {
                    "id": "5",
                    "parentid": "1",
                    "text": "White Hot Chocolate"
                }, {
                    "text": "Chocolate Beverage",
                    "id": "1",
                    "parentid": "-1"
                }, {
                    "id": "6",
                    "text": "Espresso Beverage",
                    "parentid": "-1"
                }, {
                    "id": "7",
                    "parentid": "6",
                    "text": "Caffe Americano"
                }, {
                    "id": "8",
                    "text": "Caffe Latte",
                    "parentid": "6"
                }, {
                    "id": "9",
                    "text": "Caffe Mocha",
                    "parentid": "6"
                }, {
                    "id": "10",
                    "text": "Cappuccino",
                    "parentid": "6"
                }, {
                    "id": "11",
                    "text": "Pumpkin Spice Latte",
                    "parentid": "6"
                }, {
                    "id": "12",
                    "text": "Frappuccino",
                    "parentid": "-1"
                }, {
                    "id": "13",
                    "text": "Caffe Vanilla Frappuccino",
                    "parentid": "12"
                }, {
                    "id": "15",
                    "text": "450 calories",
                    "parentid": "13"
                }, {
                    "id": "16",
                    "text": "16g fat",
                    "parentid": "13"
                }, {
                    "id": "17",
                    "text": "13g protein",
                    "parentid": "13"
                }, {
                    "id": "14",
                    "text": "Caffe Vanilla Frappuccino Light",
                    "parentid": "12"
                }]
                // prepare the data
                var source =
                {
                    datatype: "json",
                    datafields: [
                        { name: 'id' },
                        { name: 'parentid' },
                        { name: 'text' }
                    ],
                    id: 'id',
                    localdata: data
                };
                // create data adapter.
                var dataAdapter = new $.jqx.dataAdapter(source);
                // perform Data Binding.
                dataAdapter.dataBind();
                // get the tree items. The first parameter is the item's id. The second parameter is the parent item's id. The 'items' parameter represents 
                // the sub items collection name. Each jqxTree item has a 'label' property, but in the JSON data, we have a 'text' field. The last parameter 
                // specifies the mapping between the 'text' and 'label' fields.
                var records = dataAdapter.getRecordsHierarchy('id', 'parentid', 'items', [{ name: 'text', map: 'label'}]);
                $('#jqxWidget').jqxTree({ source: records, width: '300px', theme: theme });
                $("#FirstExpandB").click(function (event) {
                    var FE_search = $("#jqxWidget").find("li");
                    var FE = FE_search[0];
                    $("#jqxWidget").jqxTree('expandItem', FE);
                });
                $("#SelExpandB").click(function () {
                    var selectedItem = $('#jqxWidget').jqxTree('selectedItem');
                    $("#jqxWidget").jqxTree('expandItem', selectedItem.element);
                });
            });
        </script>
        <div id='jqxWidget'>
        </div>
        <button id="FirstExpandB">
            Expand the first item</button>
        <button id="SelExpandB">
            Expand selected item</button>
    </div>
</body>
</html>

Best Regards,
Dimitar

jqWidgets team
http://www.jqwidgets.com/

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