TreeGrid and TypeScript

[liskajParticipant]

Hello,

I’m using jqWidgets together with TypeScript (no Angular) however I’m experiencing errors when using TreeGrid. I create instance similar to your sample (https://github.com/jqwidgets/jQWidgets/blob/master/demos/typescript/treegrid/typescript-treegrid.ts):

this._tree = jqwidgets.createInstance('#types-tree', 'jqxTreeGrid', treeOptions);

However I’m getting error when subscribing to events or calling any other function from TreeGrid:

this._tree.addEventHandler('contextmenu', () => {
 ...
});

The same approach works fine with other jqx controls (i.e. jqxGrid). I’m using jqWidgets 6.0.5.

Did I miss something?

Thank you

[Peter StoevKeymaster]

Hi

The sample actually shows that it successfully calls the expandRow method within the ready callback. This code below shows how to bind to an event:

/// <reference path="../../../jqwidgets-ts/jqwidgets.d.ts" />

function createTreeGrid(selector) {
    var source =
        {
            dataType: "csv",
            dataFields: [
                { name: 'EmployeeKey', type: 'number' },
                { name: 'ParentEmployeeKey', type: 'number' },
                { name: 'FirstName', type: 'string' },
                { name: 'LastName', type: 'string' },
                { name: 'Title', type: 'string' },
                { name: 'HireDate', type: 'date' },
                { name: 'BirthDate', type: 'date' },
                { name: 'Phone', type: 'string' },
                { name: 'Gender', type: 'string' },
                { name: 'DepartmentName', type: 'string' }
            ],
            hierarchy:
            {
                keyDataField: { name: 'EmployeeKey' },
                parentDataField: { name: 'ParentEmployeeKey' }
            },
            id: 'EmployeeKey',
            url: '../../sampledata/employeesadv.csv'
        };
    var dataAdapter = new $.jqx.dataAdapter(source);
    // Create Tree Grid
    //// initialization options - validated in typescript
    //// jqwidgets.TreeGridOptions has generated TS definition
    var options: jqwidgets.TreeGridOptions = {
        width: 850,
        source: dataAdapter,
        pageable: true,
        columnsResize: true,
        ready: function () {
            // expand row with 'EmployeeKey = 32'
            myTreeGrid.expandRow(32);
            document.querySelector(selector).addEventListener('contextmenu', function (event) {
                alert("TEST");
            });

            myTreeGrid.expandAll();
        },
        columns: [
            { text: 'FirstName', dataField: 'FirstName', minWidth: 100, width: 200 },
            { text: 'LastName', dataField: 'LastName', width: 200 },
            { text: 'Department Name', dataField: 'DepartmentName', width: 150 },
            { text: 'Title', dataField: 'Title', width: 300 },
            { text: 'Birth Date', dataField: 'BirthDate', cellsFormat: 'd', width: 120 },
            { text: 'Hire Date', dataField: 'HireDate', cellsFormat: 'd', width: 120 },
            { text: 'Phone', dataField: 'Phone', cellsFormat: 'd', width: 120 }
        ]
    };

    // creates an instance
    var myTreeGrid: jqwidgets.jqxTreeGrid = jqwidgets.createInstance(selector, 'jqxTreeGrid', options);
}

Regards,
Peter

[liskajParticipant]

Hi Peter,

thank you for fast response. So I shouldn’t be using addEventHandler method for event subscription, correct? It’s interesting that it works with other controls (i.e. jqxGrid, jqxMenu). While debugging I noticed that host property of tree instance is undefined.

Thank you,
-jan

[Author]

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