<template>
    <div>
        <JqxTreeGrid ref="treeGrid"
                     :width="getWidth"
                     :source="dataAdapter"
                     :editable="true"
                     :columns="columns"
                     :ready="ready">
        </JqxTreeGrid>
        <div style="font-family: Verdana; font-size: 12px; width: 670px;">
            <ul>
                <li><b>Left Arrow</b> key - on an expanded record, collapses the record.</li>
                <li><b>Left Arrow</b> key - on a collapsed or end record moves focus to the record's parent.</li>
                <li><b>Right Arrow</b> key - on a collapsed record expands the record.</li>
                <li><b>Right Arrow</b> key - on an expanded record, moves to the first child record, or does nothing on an end record.</li>
                <li><b>Up Arrow</b> key is pressed - Selects the row above.</li>
                <li><b>Down Arrow</b> key is pressed - Selects the row below.</li>
                <li><b>Page Up/Down</b> is pressed - Navigate Up or Down with one page.</li>
                <li><b>Home/End</b> is pressed - Navigate to the first or last row on the current page.</li>
                <li><b>Enter</b> key is pressed - Saves the Edited Row.</li>
                <li><b>Esc</b> key is pressed - Closes all Editors and Cancels the changes.</li>
                <li><b>F2</b> key is pressed -  Enters edit mode for the currently selected row.</li>
                <li><b>Shift+Arrow</b> key extends the selection.</li>
                <li><b>Shift</b> extends the selection when an end user clicks on a row.</li>
                <li><b>Ctrl</b> key is pressed - extends the selection when an end user clicks on a row. </li>
                <li><b>Space</b> key is pressed - Checks/Unchecks the selected record(s). </li>
            </ul>
        </div>
    </div>
</template>

<script>
    import JqxTreeGrid from 'jqwidgets-scripts/jqwidgets-vue/vue_jqxtreegrid.vue';

    export default {
        components: {
            JqxTreeGrid
        },
        data: function () {
            return {
                getWidth: '90%',
                dataAdapter: new jqx.dataAdapter(this.source),
                columns: [
                    { text: 'FirstName', columnGroup: 'Name', dataField: 'FirstName', width: 200 },
                    { text: 'LastName', columnGroup: 'Name', dataField: 'LastName', width: 150 },
                    { text: 'Title', dataField: 'Title', width: 160 },
                    { text: 'Birth Date', dataField: 'BirthDate', cellsFormat: 'd', width: 120 },
                    { text: 'Hire Date', dataField: 'HireDate', cellsFormat: 'd', width: 120 },
                    { text: 'Address', dataField: 'Address', width: 250 },
                    { text: 'City', dataField: 'City', width: 120 },
                    { text: 'Country', dataField: 'Country', width: 200 }
                ]
            }
        },
        beforeCreate: function () {

            const 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." }
            ];

            this.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
            };
        },
        methods: {
            ready: function () {
                this.$refs.treeGrid.expandRow(2);
                this.$refs.treeGrid.selectRow(2);
            }
        }
    }
</script>

<style>
</style>