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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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<dx-tree-list id="treeList" [dataSource]="dataSource" parentIdExpr="Task_Parent_ID" wordWrapEnabled="true" showBorders="true" focusedRowEnabled="true" hasItemsExpr="Has_Items" [(focusedRowKey)]="focusedRowKey" (onFocusedRowChanged)="onFocusedRowChanged($event)"> <dxo-remote-operations [filtering]="true" [sorting]="true" [grouping]="true"></dxo-remote-operations> <dxi-column dataField="Task_ID" width="100" alignment="left"></dxi-column> <dxi-column dataField="Task_Assigned_Employee_ID" caption="Assigned" minWidth="120"> <dxo-lookup [dataSource]="customersData" valueExpr="ID" displayExpr="Name"></dxo-lookup> </dxi-column> <dxi-column dataField="Task_Status" caption="Status" width=160></dxi-column> <dxi-column dataField="Task_Start_Date" caption="Start Data" dataType="date" width=160></dxi-column> <dxi-column dataField="Task_Due_Date" caption="Due Data" dataType="date" width=160></dxi-column> </dx-tree-list> <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> <dx-number-box id="taskId" min="1" max="182" step="0" [(value)]="focusedRowKey"> </dx-number-box> </div> </div>
import { NgModule, Component, ViewChild, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxTreeListModule, DxNumberBoxModule } from 'devextreme-angular'; import * as AspNetData from 'devextreme-aspnet-data-nojquery'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } const url = "https://js.devexpress.com/Demos/Mvc/api/TreeListTasks"; @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], preserveWhitespaces: true }) export class AppComponent { columns: any; dataSource: any; customersData: any; taskSubject: string; taskAssigned: string; startDate: string; taskStatus: string; taskProgress: string; focusedRowKey: number; constructor() { this.focusedRowKey = 4; this.dataSource = AspNetData.createStore({ key: "Task_ID", loadUrl: url + "/Tasks", onBeforeSend: function(_, ajaxOptions) { ajaxOptions.xhrFields = { withCredentials: true }; } }); this.customersData = AspNetData.createStore({ key: "ID", loadUrl: url + "/TaskEmployees" }); } onFocusedRowChanged(e) { var rowData = e.row && e.row.data, assignedToData = e.component.columnOption("Assigned").lookup.items[e.rowIndex]; if(rowData) { this.taskSubject = rowData.Task_Subject; this.taskAssigned = assignedToData.Name; this.startDate = new Date(rowData.Task_Start_Date).toLocaleDateString(); this.taskStatus = rowData.Task_Status; this.taskProgress = rowData.Task_Completion ? rowData.Task_Completion + "%" : ""; } } } @NgModule({ imports: [ BrowserModule, DxTreeListModule, DxNumberBoxModule ], declarations: [AppComponent], bootstrap: [AppComponent], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
#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; }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme-aspnet-data-nojquery': { "esModule": true } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.4.5/lib/typescript.js', '@angular/core': 'npm:@angular/core@8.0.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@8.0.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@8.0.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@8.0.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@8.0.0/bundles/platform-browser-dynamic.umd.js', '@angular/router': 'npm:@angular/router@8.0.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@8.0.0/bundles/forms.umd.js', '@angular/common/http': 'npm:@angular/common@8.0.0/bundles/common-http.umd.js', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', 'rxjs/operators': 'npm:rxjs@6.3.3/operators', 'devextreme': 'npm:devextreme@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', 'devextreme-angular': 'npm:devextreme-angular@19.2', 'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@2.5.1' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'rxjs': { main: 'index.js', defaultExtension: 'js' }, 'rxjs/operators': { main: 'index.js', defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!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" /> <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" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>