极客教程Angular PrimeNG TreeTable加载状态
Angular PrimeNG是一个开源框架，拥有丰富的原生Angular UI组件，可用于出色的造型，这个框架用于制作响应式网站，非常容易。在这篇文章中，我们将看到如何在Angular PrimeNG中使用TreeTable Column Resize。
Angular PrimeNG TreeTable Loading Status在TreeTable组件中启用了一个加载器。装载器使TreeTable组件具有交互性，是代表数据加载前的一个好方法。
语法:
<p-treeTable
[loading]='loading'>
</p-treeTable>
创建Angular应用程序和模块安装。
第1步：使用以下命令创建一个Angular应用程序。
ng new appname
第2步：创建你的项目文件夹即appname后，使用以下命令移动到它。
cd appname
第3步：在你给定的目录中安装PrimeNG。
npm install primeng --save
npm install primeicons --save
项目结构：它将看起来像如下。
例子1：下面是一个简单的例子，演示了Angular PrimeNG TreeTable加载状态的使用，在这个例子中，我们将数据延迟了1秒，并使用加载器直到数据。
<div style="height: calc(100vh - 149px)">
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG TreeTable Loading Status</h4>
<p-treeTable [columns]="cols"
[value]="tableData"
[loading]="loading">
<ng-template pTemplate="colgroup" let-columns>
<colgroup>
<col *ngFor="let col of columns" />
</colgroup>
</ng-template>
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of columns" ttReorderableColumn>
{{ col.header }}
</th>
</tr>
</ng-template>
<ng-template pTemplate="body"
let-rowNode let-rowData="rowData"
let-columns="columns">
<tr>
<td *ngFor="let col of columns; let i = index">
<p-treeTableToggler [rowNode]="rowNode"
*ngIf="i == 0">
</p-treeTableToggler>
{{ rowData[col.field] }}
</td>
</tr>
</ng-template>
</p-treeTable>
</div>
import { Component, OnInit } from "@angular/core";
import { NodeService } from "./nodeservice";
import { TreeNode } from "primeng/api";
@Component({
selector: "app-root",
templateUrl: "./app.component.html",
})
export class AppComponent {
tableData: TreeNode[] = [];
cols: any[] = [];
loading: boolean;
constructor(private nodeService: NodeService) {}
ngOnInit() {
this.cols = [
{ field: "firstname", header: "First Name" },
{ field: "lastname", header: "Last Name" },
{ field: "age", header: "Age" },
];
this.loading = true;
setTimeout(() => {
this.loading = false;
this.tableData = [
{
data: {
firstname: "David",
lastname: "ace",
age: "40",
},
children: [
{
data: {
firstname: "Nathan",
lastname: "ace",
age: "16",
},
children: [
{
data: {
firstname: "Abe",
lastname: "ace",
age: "12",
},
},
{
data: {
firstname: "Ksi",
lastname: "ace",
age: "12",
},
},
],
},
{
data: {
firstname: "Shane",
lastname: "ace",
age: "14",
},
},
],
},
{
data: {
firstname: "Warner",
lastname: "ace",
age: "55",
},
children: [
{
data: {
lastname: "ace",
firstname: "Michelle",
age: "20",
},
},
{
data: {
firstname: "Charlie",
lastname: "ace",
age: "24",
},
},
],
},
{
data: {
firstname: "Max",
lastname: "ace",
age: "55",
},
children: [
{
data: {
firstname: "Michelle",
lastname: "ace",
age: "20",
},
},
{
data: {
firstname: "Charlie",
lastname: "ace",
age: "24",
},
},
],
},
{
data: {
firstname: "Willy",
lastname: "ace",
age: "55",
},
children: [
{
data: {
firstname: "Michelle",
lastname: "ace",
age: "20",
},
},
{
data: {
firstname: "Charlie",
lastname: "ace",
age: "24",
},
},
],
},
{
data: {
firstname: "Miley",
lastname: "ace",
age: "55",
},
children: [
{
data: {
firstname: "Michelle",
lastname: "ace",
age: "20",
},
},
{
data: {
firstname: "Charlie",
lastname: "ace",
age: "24",
},
},
],
},
{
data: {
firstname: "Sam",
lastname: "ace",
age: "55",
},
children: [
{
data: {
firstname: "Michelle",
lastname: "ace",
age: "20",
},
},
{
data: {
firstname: "Charlie",
lastname: "ace",
age: "24",
},
},
],
},
{
data: {
firstname: "James",
lastname: "ace",
age: "55",
},
children: [
{
data: {
firstname: "Michelle",
lastname: "ace",
age: "20",
},
},
{
data: {
lastname: "ace",
firstname: "Charlie",
age: "24",
},
},
],
},
];
}, 1000);
}
}
import { NgModule } from "@angular/core";
import { BrowserModule } from "@angular/platform-browser";
import { FormsModule } from "@angular/forms";
import { HttpClientModule } from "@angular/common/http";
import { BrowserAnimationsModule }
from "@angular/platform-browser/animations";
import { AppComponent } from "./app.component";
import { NodeService } from "./nodeservice";
import { TreeTableModule } from "primeng/treetable";
import { ButtonModule } from "primeng/button";
import { InputTextModule } from "primeng/inputtext";
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
ButtonModule,
InputTextModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
})
export class AppModule {}
输出:
例子2：在这个例子中，我们应用了无限的加载。
<div style="height: calc(100vh - 149px)">
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG TreeTable Loading Status</h4>
<p-treeTable [columns]="cols"
[value]="tableData"
[loading]="loading">
<ng-template pTemplate="colgroup" let-columns>
<colgroup>
<col *ngFor="let col of columns" />
</colgroup>
</ng-template>
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of columns" ttReorderableColumn>
{{ col.header }}
</th>
</tr>
</ng-template>
<ng-template pTemplate="body"
let-rowNode let-rowData="rowData"
let-columns="columns">
<tr>
<td *ngFor="let col of columns; let i = index">
<p-treeTableToggler [rowNode]="rowNode"
*ngIf="i == 0">
</p-treeTableToggler>
{{ rowData[col.field] }}
</td>
</tr>
</ng-template>
</p-treeTable>
</div>
import { Component, OnInit } from "@angular/core";
import { TreeNode } from "primeng/api";
@Component({
selector: "app-root",
templateUrl: "./app.component.html",
})
export class AppComponent {
tableData: TreeNode[] = [];
cols: any[] = [];
loading: boolean;
constructor() {}
ngOnInit() {
this.cols = [
{ field: "firstname", header: "First Name" },
{ field: "lastname", header: "Last Name" },
{ field: "age", header: "Age" },
];
this.loading = true;
}
}
import { NgModule } from "@angular/core";
import { BrowserModule } from "@angular/platform-browser";
import { FormsModule } from "@angular/forms";
import { HttpClientModule } from "@angular/common/http";
import { BrowserAnimationsModule }
from "@angular/platform-browser/animations";
import { AppComponent } from "./app.component";
import { NodeService } from "./nodeservice";
import { TreeTableModule } from "primeng/treetable";
import { ButtonModule } from "primeng/button";
import { InputTextModule } from "primeng/inputtext";
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
ButtonModule,
InputTextModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
})
export class AppModule {}
输出:
