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jQWidgets jqxTreeGrid pageChanged Event

  • Last Updated : 07 Oct, 2021

jQWidgets is a JavaScript framework for making web-based applications for PC and mobile devices. It is a very powerful, optimized, platform-independent, and widely supported framework. The jqxTreeGrid is used for representing data in a tree-like structure. This widget is useful for displaying multi-column of hierarchical data, data paging, sorting and filtering, data editing, column resizing, fixed columns, conditional formatting, aggregates, and rows selection. These widgets also read and display the data from any type of data sources such as XML, JSON, Array, CSV, or TSV.

The pageChanged event is used to trigger when the current page of the specified jqxTreeGrid is changed.

Syntax:

$('#treeGrid').on('pageChanged',  function (event)
{
   // Argument of the Event
   var args = event.args;
   // Page number
   var pageNum = args.pagenum;
   // Old page number
   var oldPageNum = args.oldpagenum;
   // Page Size
   var pageSize args.pagesize;
});

Linked Files: Download jQWidgets from the given link. In the HTML file, locate the script files in the downloaded folder.

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery.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/jqxlistbox.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdropdownlist.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdatatable.js”></script>

Example: The below example illustrates the jQWidgets jqxTreeGrid pageChanged event. In the below example, previous page number is returned.

HTML




<!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.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/jqxlistbox.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdropdownlist.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdatatable.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxtreegrid.js">
    </script>
  </head>
  
  <body>
    <center>
      <h1 style="color: green">GeeksforGeeks</h1>
      <h3>jQWidgets jqxTreeGrid pageChanged Event</h3>
      <div id="jqxTreeGrid" style="margin: 25px"></div>
      <div id="log"></div>
        
      <script type="text/javascript">
        $(document).ready(function () {
          var A = [
            {
              ID: 1,
              Employee_Name: "Amit",
              Company: "GeeksforGeeks",
              Designation: "Content Writer",
              expanded: true,
              A1: [
                {
                  ID: 2,
                  Employee_Name: "Sumit",
                  Company: "Amazon",
                  Designation: "Software Engineer",
                },
                {
                  ID: 3,
                  Employee_Name: "Vivek",
                  Company: "Apple",
                  Designation: "Product Manager",
                  expanded: true,
                  A1: [
                    {
                      ID: 4,
                      Employee_Name: "Soni",
                      Company: "Flipkart",
                      Designation: "HR",
                    },
                  ],
                },
              ],
            },
          ];
  
          var Data_Source = {
            dataFields: [
              {
                name: "ID",
              },
              {
                name: "Employee_Name",
              },
              {
                name: "Company",
              },
              {
                name: "Designation",
              },
              {
                name: "A1",
                type: "array",
              },
              {
                name: "expanded",
              },
            ],
            hierarchy: {
              root: "A1",
            },
            id: "ID",
            localData: A,
          };
  
          var Data = new $.jqx.dataAdapter(Data_Source);
  
          $("#jqxTreeGrid").jqxTreeGrid({
            source: Data,
            pageable: true,
            pageSize: 1,
            ready: function () {
              $("#jqxTreeGrid").jqxTreeGrid("expandRow", "1");
              $("#jqxTreeGrid").jqxTreeGrid("expandRow", "3");
            },
            columns: [
              {
                text: "Employee_Name",
                align: "center",
                dataField: "Employee_Name",
                width: 140,
              },
              {
                text: "Company",
                align: "center",
                dataField: "Company",
                width: 150,
              },
              {
                text: "Designation",
                align: "center",
                dataField: "Designation",
                width: 150,
              },
            ],
          });
          $("#jqxTreeGrid").on("pageChanged", function (event) {
            var Arguments = event.args;
            var Previous_Page_Number = Arguments.pagenum;
            $("#log").html(
              JSON.stringify(
                "The previous page number was : " + Previous_Page_Number
              )
            );
          });
        });
      </script>
    </center>
  </body>
</html>

Output:

Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxtreegrid/jquery-treegrid-api.htm?search=


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