Angular PrimeNG TieredMenu Methods
Last Updated :
21 Dec, 2022
Angular PrimeNG is an open-source framework with a rich set of native Angular UI components that are used for great styling and this framework is used to make responsive websites with very much ease. It provides a lot of templates, components, theme design, an extensive icon library, and much more. In this article, we will see the Angular PrimeNG TieredMenu Methods.
The TieredMenu component allows the creation of the menu in the form of a tier. It displays submenus in nested overlays. The TieredMenu Methods are used to display or hide or toggle the visibility of the menu.
Angular PrimeNG TieredMenu Methods:
- toggle: It is used to toggle the visibility of the popup menu.
- show: It is used to display the popup menu.
- hide: It is used to hide the popup menu.
Syntax:
// For app.component.html
<p-tieredMenu #menu [model]="items"
[popup]="true">
</p-tieredMenu>
<button #btn type="button" pButton
icon="pi pi-fw pi-list"
label="Show"
(click)="handleClick($event)">
</button>
// For app.component.ts
handleClick(event) {
this.menu.show(event);
}
Creating Angular application & Module Installation:
Step 1: Create an Angular application using the following command.
ng new geeks_angular
Step 2: After creating your project folder i.e. geeks_angular, move to it using the following command.
cd geeks_angular
Step 3: Install PrimeNG in your given directory.
npm install primeng --save
npm install primeicons --save
Project Structure: The project structure will look like the following:
Example 1: In the following example, we have a TieredMenu with a show button. This calls the show() method.
HTML
< h1 style = "color: green; text-align:center;" >
GeeksforGeeks
</ h1 >
< h3 >Angular PrimeNG TieredMenu Methods</ h3 >
< p-tieredMenu #menu [model]="items" [popup]="true">
</ p-tieredMenu >
< button #btn type = "button" pButton
icon = "pi pi-fw pi-list"
label = "Show"
(click)="handleClick($event)">
</ button >
|
Javascript
import { Component, OnInit, ViewEncapsulation, ViewChild }
from '@angular/core' ;
import { MenuItem } from 'primeng/api' ;
import { SlideMenu } from 'primeng/slidemenu' ;
@Component({
selector: 'app-root' ,
templateUrl: './app.component.html' ,
styleUrls: [ './app.component.css' ],
})
export class AppComponent {
items: MenuItem[];
@ViewChild( 'menu' ) menu!: SlideMenu;
ngOnInit() {
this .items = [
{
label: 'Data Structures' ,
items: [
{
label: 'Linked List' ,
items: [
{
label: 'Singly Linked List' ,
},
{
label: 'Doubly Linked List' ,
},
],
},
{
label: 'Trie' ,
},
{
label: 'Array' ,
},
],
},
{
label: 'Algorithms' ,
items: [
{
label: 'Sorting' ,
},
{
label: 'Searching' ,
},
],
},
{
label: 'Development' ,
items: [
{
label: 'Android' ,
},
{
label: 'Web development' ,
},
],
},
];
}
handleClick(event) {
this .menu.show(event);
}
}
|
Javascript
import { NgModule } from '@angular/core' ;
import { BrowserModule }
from '@angular/platform-browser' ;
import { BrowserAnimationsModule }
from '@angular/platform-browser/animations' ;
import { AppComponent } from './app.component' ;
import { TieredMenuModule } from 'primeng/tieredmenu' ;
import { ButtonModule } from 'primeng/button' ;
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TieredMenuModule,
ButtonModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
|
Output:
Example 2: In the following example, we have Show Button and a Toggle button with their respective functions.
HTML
< h1 style="color: green;
text-align:center;">
GeeksforGeeks
</ h1 >
< h3 >Angular PrimeNG TieredMenu Methods</ h3 >
< p-tieredMenu #menu [model]="items"
[popup]="true">
</ p-tieredMenu >
< button #btn type = "button" pButton
icon = "pi pi-fw pi-list"
label = "Show"
(click)="showClick($event)">
</ button >
< button #btn type = "button" pButton
icon = "pi pi-fw pi-list"
label = "Toggle"
(click)="toggleClick($event)">
</ button >
|
Javascript
import { Component, OnInit, ViewEncapsulation, ViewChild }
from '@angular/core' ;
import { MenuItem } from 'primeng/api' ;
import { SlideMenu } from 'primeng/slidemenu' ;
@Component({
selector: 'app-root' ,
templateUrl: './app.component.html' ,
styleUrls: [ './app.component.css' ],
})
export class AppComponent {
items: MenuItem[];
@ViewChild( 'menu' ) menu!: SlideMenu;
ngOnInit() {
this .items = [
{
label: 'Data Structures' ,
items: [
{
label: 'Linked List' ,
items: [
{
label: 'Singly Linked List' ,
},
{
label: 'Doubly Linked List' ,
},
],
},
{
label: 'Trie' ,
},
{
label: 'Array' ,
},
],
},
{
label: 'Algorithms' ,
items: [
{
label: 'Sorting' ,
},
{
label: 'Searching' ,
},
],
},
{
label: 'Development' ,
items: [
{
label: 'Android' ,
},
{
label: 'Web development' ,
},
],
},
];
}
showClick(event) {
this .menu.show(event);
}
toggleClick(event) {
this .menu.toggle(event);
}
}
|
Javascript
import { NgModule } from '@angular/core' ;
import { BrowserModule }
from '@angular/platform-browser' ;
import { BrowserAnimationsModule }
from '@angular/platform-browser/animations' ;
import { AppComponent } from './app.component' ;
import { TieredMenuModule } from 'primeng/tieredmenu' ;
import { ButtonModule } from 'primeng/button' ;
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TieredMenuModule,
ButtonModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
|
Output:
Reference: http://primefaces.org/primeng/tieredmenu
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