Focused Row
Documentation
This example demonstrates a TreeList component that supports focused rows. The focusedRowKey property specifies the focused row. The onFocusedRowChanged callback function can be used to display additional information below the TreeList when the focused row changes. The focusedRowEnabled property enables row focusing.
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$(function(){
var url = "https://js.devexpress.com/Demos/Mvc/api/TreeListTasks",
treeList,
taskEmployees = DevExpress.data.AspNet.createStore({
key: "ID",
loadMode: "raw",
loadUrl: url + "/TaskEmployees"
});
treeList = $("#treeList").dxTreeList({
dataSource: DevExpress.data.AspNet.createStore({
key: "Task_ID",
loadUrl: url + "/Tasks",
onBeforeSend: function(_, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
}
}),
remoteOperations: {
filtering: true,
sorting: true,
grouping: true
},
parentIdExpr: "Task_Parent_ID",
hasItemsExpr: "Has_Items",
focusedRowEnabled: true,
focusedRowKey: 4,
showBorders: true,
wordWrapEnabled: true,
columns: [
{
dataField: "Task_ID",
width: 100,
alignment: "left"
},
{
dataField: "Task_Assigned_Employee_ID",
caption: "Assigned",
minWidth: 120,
lookup: {
dataSource: taskEmployees,
valueExpr: "ID",
displayExpr: "Name"
}
},
{
dataField: "Task_Status",
caption: "Status",
width: 160,
},
{
dataField: "Task_Start_Date",
caption: "Start Date",
dataType: "date",
width: 160
},
{
dataField: "Task_Due_Date",
caption: "Due Date",
dataType: "date",
width: 160
}
],
onFocusedRowChanged: function(e) {
var rowData = e.row && e.row.data,
cellValue,
assigned;
if (rowData) {
cellValue = e.component.cellValue(e.row.rowIndex, "Assigned");
taskEmployees.byKey(cellValue).done(function(item) {
assigned = item.Name;
});
$(".task-subject").html(rowData.Task_Subject);
$(".task-assigned").html(assigned);
$(".start-date").html(new Date(rowData.Task_Start_Date).toLocaleDateString());
$(".task-status").html(rowData.Task_Status);
var progress = rowData.Task_Completion ? rowData.Task_Completion + "%" : "";
$(".task-progress").text(progress);
}
$("#taskId").dxNumberBox("instance").option("value", treeList.option("focusedRowKey"));
}
}).dxTreeList("instance");
$("#taskId").dxNumberBox({
min: 1,
max: 182,
step: 0,
onValueChanged: function(e) {
if(e.event && e.value > 0) {
treeList.option("focusedRowKey", e.value);
}
}
});
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.light.css" />
<script src="https://cdn3.devexpress.com/jslib/20.2.6/js/dx.all.js"></script>
<script src="https://unpkg.com/devextreme-aspnet-data@2.7.1/js/dx.aspnet.data.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="treeList"></div>
<div class="task-info">
<div class="info">
<div class="task-subject"></div>
<span class="task-assigned"></span>
<span class="start-date"></span>
</div>
<div class="progress">
<span class="task-status"></span>
<span class="task-progress"></span>
</div>
</div>
<div class="options">
<div class="caption">Options</div>
<div class="option">
<span>Focused row key</span>
<div id="taskId"></div>
</div>
</div>
</div>
</body>
</html>
#treeList {
max-height: 400px;
}
.task-info {
font-family: Segoe UI;
min-height: 100px;
display: flex;
flex-wrap: nowrap;
border: 2px solid rgba(0, 0, 0, 0.1);
padding: 16px;
box-sizing: border-box;
align-items: center;
justify-content: space-between;
}
.info {
display: flex;
flex-direction: column;
}
.task-subject {
line-height: 29px;
font-size: 18px;
font-weight: bold;
}
.progress {
display: flex;
flex-direction: column;
white-space: pre;
min-width: 105px;
}
.task-progress {
line-height: 42px;
font-size: 40px;
font-weight: bold;
}
.options {
margin-top: 20px;
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
position: relative;
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option {
margin-top: 10px;
}
.option > .dx-numberbox {
width: 200px;
display: inline-block;
vertical-align: middle;
}
.option > span {
margin-right: 10px;
}