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Tree List

Focused Row

Documentation

This example demonstrates a TreeList widget that supports focused rows. The focusedRowKey option 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 option enables row focusing.

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var DemoApp = angular.module('DemoApp', ['dx']), url = "https://js.devexpress.com/Demos/Mvc/api/TreeListTasks"; DemoApp.controller('DemoController', function DemoController($scope) { $scope.treeList; $scope.focusedRowKeyEditor; $scope.taskSubject = ""; $scope.taskAssigned = ""; $scope.startDate = ""; $scope.taskStatus = ""; $scope.taskProgress = ""; $scope.treeListOptions = { 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: DevExpress.data.AspNet.createStore({ key: "ID", loadUrl: url + "/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 } ], onInitialized: function(e) { $scope.treeList = e.component; }, onFocusedRowChanged: function(e) { var rowData = e.row.data, assignedToData = $scope.treeList.columnOption("Assigned").lookup.items[e.rowIndex]; $scope.taskSubject = rowData.Task_Subject; $scope.taskAssigned = assignedToData.Name; $scope.startDate = new Date(rowData.Task_Start_Date).toLocaleDateString(); $scope.taskStatus = rowData.Task_Status; $scope.taskProgress = rowData.Task_Completion ? rowData.Task_Completion + "%" : ""; $scope.focusedRowKeyEditor.option("value", e.component.option("focusedRowKey")); } }; $scope.focusedRowKeyOptions = { min: 1, max: 182, step: 0, onInitialized: function(e) { $scope.focusedRowKeyEditor = e.component; }, onValueChanged: function(e) { if(e.event && e.value > 0) { $scope.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/3.4.1/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/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.16/angular.min.js"></script> <script>window.angular || document.write(decodeURIComponent('%3Cscript src="js/angular.min.js"%3E%3C\/script%3E'))</script> <script src="https://cdn3.devexpress.com/jslib/19.2.4/js/dx.all.js"></script> <script src="https://unpkg.com/devextreme-aspnet-data@2.5.1/js/dx.aspnet.data.js"></script> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container" ng-app="DemoApp" ng-controller="DemoController"> <div id="treeList" dx-tree-list="treeListOptions"></div> <div class="task-info"> <div class="info"> <div class="task-subject">{{taskSubject}}</div> <span class="task-assigned">{{taskAssigned}}</span> <span class="start-date">{{startDate}}</span> </div> <div class="progress"> <span class="task-status">{{taskStatus}}</span> <span class="task-progress">{{taskProgress}}</span> </div> </div> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Focused row key</span> <div id="taskId" dx-number-box="focusedRowKeyOptions"></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; }