Angular PrimeNG树形滚动

Angular PrimeNG树形滚动

Angular PrimeNG是一个开源框架,拥有丰富的原生Angular UI组件,可以用来做很好的造型,这个框架用来制作响应式网站非常方便。这篇文章将向我们展示如何在Angular PrimeNG中使用树状滚动。

Angular PrimeNG Tree Scroll用于在Tree Component中实现滚动。滚动器是一种有效处理数据的方法。我们可以轻松地添加一个滚动器,以可滚动的方式显示数据。

语法:

<p-tree 
    [value]="..." 
    scrollHeight="...">
</p-tree>

Angular PrimeNG Tree Scroll属性:

  • scrollHeight: 它用于定义可滚动视口的高度。它是一个字符串类型,其默认值为空。
  • value:它用于定义所有树节点的数组。它是一个数组类型,其默认值为空。

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

步骤3: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。

Angular PrimeNG树形滚动

例子1:下面是一个简单的例子,演示Angular PrimeNG TreeTable Scroll的使用。

  • app.component.html
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG Tree Scroll</h4>
<p-tree [value]="files1" scrollHeight="300px"> </p-tree>
  • app.component.ts
import { Component, OnInit } from '@angular/core';
import { TreeNode } from 'primeng/api';
  
@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})
export class AppComponent {
    files1: TreeNode[] = [];
  
    constructor() { }
  
    ngOnInit() {
        this.files1 = [
            { label: 'Z', icon: 'pi pi-folder' },
            { label: 'A', icon: 'pi pi-folder' },
            { label: 'D', icon: 'pi pi-folder' },
            { label: 'C', icon: 'pi pi-folder' },
            { label: 'W', icon: 'pi pi-folder' },
            { label: 'E', icon: 'pi pi-folder' },
            { label: 'R', icon: 'pi pi-folder' },
            { label: 'G', icon: 'pi pi-folder' },
            { label: 'K', icon: 'pi pi-folder' },
  
            {
                label: 'A',
                icon: 'pi pi-folder',
  
                children: [
                    {
                        label: 'B',
                        icon: 'pi pi-folder',
  
                        children: [
                            {
                                label: 'C',
                                icon: 'pi pi-folder',
                            },
                            {
                                label: 'D',
                                icon: 'pi pi-folder',
                            },
                        ],
                    },
                    {
                        label: 'E',
                        icon: 'pi pi-folder',
  
                        children: [
                            {
                                label: 'F',
                                icon: 'pi pi-folder',
                            },
                        ],
                    },
                ],
            },
            {
                label: 'G',
                icon: 'pi pi-folder',
  
                children: [
                    {
                        label: 'H',
                        icon: 'pi pi-folder',
                    },
                    {
                        label: 'I',
                        icon: 'pi pi-folder',
                    },
                    {
                        label: 'J',
                        icon: 'pi pi-folder',
                    },
                ],
            },
        ];
    }
}
  • app.module.ts
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 { TreeModule } from 'primeng/tree';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';
import { VirtualScrollerModule }
    from 'primeng/virtualscroller';
  
@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TreeModule,
        ButtonModule,
        InputTextModule,
        HttpClientModule,
        FormsModule,
        VirtualScrollerModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [],
})
export class AppModule { }

输出:

Angular PrimeNG树形滚动

实例2:下面是一个简单的例子,演示了Angular PrimeNG TreeTable Scroll的使用。

  • app.component.html
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG Tree Scroll</h4>
<p-tree [value]="files1" scrollHeight="200px"> </p-tree>
  • app.component.ts
import { Component, OnInit } from '@angular/core';
import { TreeNode } from 'primeng/api';
  
@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})
export class AppComponent {
    files1: TreeNode[] = [];
  
    constructor() { }
  
    ngOnInit() {
        this.files1 = [
            { label: 'Z', icon: 'pi pi-folder' },
            { label: 'A', icon: 'pi pi-folder' },
            { label: 'D', icon: 'pi pi-folder' },
            { label: 'C', icon: 'pi pi-folder' },
            { label: 'W', icon: 'pi pi-folder' },
            { label: 'E', icon: 'pi pi-folder' },
            { label: 'R', icon: 'pi pi-folder' },
            { label: 'G', icon: 'pi pi-folder' },
            { label: 'K', icon: 'pi pi-folder' },
  
            {
                label: 'A',
                icon: 'pi pi-folder',
  
                children: [
                    {
                        label: 'B',
                        icon: 'pi pi-folder',
  
                        children: [
                            {
                                label: 'C',
                                icon: 'pi pi-folder',
                            },
                            {
                                label: 'D',
                                icon: 'pi pi-folder',
                            },
                        ],
                    },
                    {
                        label: 'E',
                        icon: 'pi pi-folder',
  
                        children: [
                            {
                                label: 'F',
                                icon: 'pi pi-folder',
                            },
                        ],
                    },
                ],
            },
            {
                label: 'G',
                icon: 'pi pi-folder',
  
                children: [
                    {
                        label: 'H',
                        icon: 'pi pi-folder',
                    },
                    {
                        label: 'I',
                        icon: 'pi pi-folder',
                    },
                    {
                        label: 'J',
                        icon: 'pi pi-folder',
                    },
                ],
            },
        ];
    }
}
  • app.module.ts
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 { TreeModule } from 'primeng/tree';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';
import { VirtualScrollerModule } 
    from 'primeng/virtualscroller';
  
@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TreeModule,
        ButtonModule,
        InputTextModule,
        HttpClientModule,
        FormsModule,
        VirtualScrollerModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [],
})
export class AppModule { }

输出:

Angular PrimeNG树形滚动

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