jqwidgets-framework
Version:
jQWidgets is an advanced Angular, Vue, Blazor, React, Web Components, jquery, ASP .NET MVC, Custom Elements and HTML5 UI framework.
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HTML
<html lang="en">
<head>
<title id="Description">In virtual mode, the Tree Grid is created on demand. In this case, Child records are created and initialized when the parent record is expanded. For example when you expand a record, jqxTreeGrid makes an Ajax request to http://services.odata.org. The request contains the expanded record's EmployeeID and as a result we get all sub records whose "ReportsTo" data field match the "EmployeeID" data field. </title>
<meta name="description" content="Load nodes on demand through Ajax - JavaScript Tree Grid Demo | jQWidgets">
<link rel="stylesheet" href="../../../jqwidgets/styles/jqx.base.css" type="text/css" />
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta name="viewport" content="width=device-width, initial-scale=1 maximum-scale=1 minimum-scale=1" />
<script type="text/javascript" src="../../../scripts/jquery-1.12.4.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/jqxdatatable.js"></script>
<script type="text/javascript" src="../../../jqwidgets/jqxtreegrid.js"></script>
<script type="text/javascript" src="../../../scripts/demos.js"></script>
<script type="text/javascript">
$(document).ready(function () {
// prepare the data
var source =
{
dataType: "json",
dataFields: [
{ name: 'EmployeeID', type: 'number' },
{ name: 'ReportsTo', type: 'number' },
{ name: 'FirstName', type: 'string' },
{ name: 'LastName', type: 'string' },
{ name: 'Country', type: 'string' },
{ name: 'City', type: 'string' },
{ name: 'Address', type: 'string' },
{ name: 'Title', type: 'string' },
{ name: 'HireDate', type: 'date' },
{ name: 'BirthDate', type: 'date' }
],
timeout: 10000,
hierarchy:
{
keyDataField: { name: 'EmployeeID' },
parentDataField: { name: 'ReportsTo' }
},
id: 'EmployeeID',
root: 'value',
url: "http://services.odata.org/V3/Northwind/Northwind.svc/Employees?$format=json&$callback=?"
};
// create Tree Grid
$("#treegrid").jqxTreeGrid(
{
width:800,
virtualModeCreateRecords: function (expandedRecord, done) {
var dataAdapter = new $.jqx.dataAdapter(source,
{
formatData: function (data) {
if (expandedRecord == null) {
data.$filter = "(ReportsTo eq null)"
}
else {
data.$filter = "(ReportsTo eq " + expandedRecord.EmployeeID + ")"
}
return data;
},
loadComplete: function()
{
done(dataAdapter.records);
},
loadError: function (xhr, status, error) {
done(false);
throw new Error("http://services.odata.org: " + error.toString());
}
}
);
dataAdapter.dataBind();
},
virtualModeRecordCreating: function (record) {
// record is creating.
},
columns: [
{ text: 'FirstName', columnGroup: 'Name', dataField: 'FirstName', width: 150 },
{ text: 'LastName', columnGroup: 'Name', dataField: 'LastName', width: 150 },
{ text: 'Title', dataField: 'Title', width: 200 },
{ text: 'Birth Date', dataField: 'BirthDate', cellsFormat: 'd' }
]
});
});
</script>
</head>
<body class='default'>
<h3 style="font-size: 16px; font-family: Verdana;">Data Source: "http://services.odata.org"</h3>
<div id="treegrid"></div>
<div style="position: absolute; bottom: 5px; right: 5px;">
<a href="https://www.jqwidgets.com/" alt="https://www.jqwidgets.com/"><img alt="https://www.jqwidgets.com/" title="https://www.jqwidgets.com/" src="https://www.jqwidgets.com/wp-content/design/i/logo-jqwidgets.png"/></a>
</div>
</body>
</html>