Angular PrimeNG ContextMenu Methods
Last Updated :
31 Jan, 2023
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. In this article, we will know how to use ContextMenu Methods in Angular PrimeNG.
The ContextMenu Component displays a menu when right-clicking over any component. Many components provide a special integration with the ContextMenu component. The ContextMenu Component appears similar to the menu that appears when we right-click over any application or desktop screen on a PC.
Angular PrimeNG ContextMenu Methods:
- toggle: This method is a mouse event that toggles whether the pop-up menu is visible.
- show: It is used to display the popup menu.
- hide: It is used to hide the popup menu.
Creating Angular application & module installation:
Step 1: Create an Angular application using the following command.
ng new appname
Step 2: After creating your project folder i.e. appname, move to it using the following command.
cd appname
Step 3: Install PrimeNG in your given directory.
npm install primeng --save
npm install primeicons --save
Project Structure: It will look like the following:
Steps to run the application: Run the below command to see the output
ng serve --save
Example 1: Below is the example code that illustrates the use of Angular PrimeNG ContextMenu Methods using the toggle Method.
HTML
<div style="text-align: center;">
<h1 style="color: green;">GeeksforGeeks</h1>
<h5>Angular PrimeNG ContextMenu Methods.</h5>
</div>
<p-treeTable
[value]="gfg1"
[columns]="selectedColumns"
dataKey="name"
[(contextMenuSelection)]="selectedNode"
[contextMenu]="gf">
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of columns">
{{ col.header }}
</th>
</tr>
</ng-template>
<ng-template
pTemplate="body"
let-rowNode
let-rowData="rowData"
let-columns="columns">
<tr [ttContextMenuRow]="rowNode">
<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>
<p-contextMenu #gf [model]="gfg2"></p-contextMenu>
|
Javascript
import { Component } from "@angular/core";
import { NodeService } from "./nodeservice";
import { TreeNode } from "primeng/api";
import { MessageService, MenuItem } from "primeng/api";
@Component({
selector: "app-root",
templateUrl: "./app.component.html",
providers: [MessageService]
})
export class AppComponent {
gfg1: TreeNode[];
cols: any[];
selectedColumns: any[];
gfg2: MenuItem[];
selectedNode: TreeNode;
constructor(
private nodeService: NodeService,
private messageService: MessageService
) {}
ngOnInit() {
this.gfg1 = [
{
data: {
name: "A",
age: "40"
},
children: [
{
data: {
name: "B",
age: "16"
}
},
{
data: {
name: "C",
age: "14"
}
}
]
},
{
data: {
name: "D",
age: "55"
},
children: [
{
data: {
name: "E",
age: "20"
}
},
{
data: {
name: "F",
age: "24"
}
}
]
},
{
data: {
name: "G",
age: "32"
},
children: [
{
data: {
name: "H",
age: "20"
}
},
{
data: {
name: "I",
age: "24"
}
}
]
},
{
data: {
name: "J",
age: "64"
},
children: [
{
data: {
name: "K",
age: "20"
}
},
{
data: {
name: "L",
age: "24"
}
}
]
},
{
data: {
name: "M",
age: "12"
},
children: [
{
data: {
name: "N",
age: "20"
}
},
{
data: {
name: "O",
age: "24"
}
}
]
},
{
data: {
name: "P",
age: "34"
},
children: [
{
data: {
name: "Q",
age: "20"
}
},
{
data: {
name: "R",
age: "24"
}
}
]
},
{
data: {
name: "S",
age: "43"
},
children: [
{
data: {
name: "T",
age: "20"
}
},
{
data: {
name: "U",
age: "24"
}
}
]
}
];
this.cols = [
{ field: "name", header: "First Name" },
{ field: "age", header: "Age" }
];
this.selectedColumns = this.cols;
this.gfg2 = [
{
label: "Expand",
icon: "pi pi-sort",
command: (event) => this.toggleGeekFile(this.selectedNode)
}
];
}
toggleGeekFile(node) {
node.expanded = !node.expanded;
this.gfg1 = [...this.gfg1];
}
}
|
Javascript
import { NgModule } from "@angular/core";
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 { ContextMenuModule } from "primeng/contextmenu";
@NgModule({
imports: [
BrowserAnimationsModule,
TreeTableModule,
ContextMenuModule,
HttpClientModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService]
})
export class AppModule {}
|
Javascript
import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
@Injectable()
export class NodeService {
constructor(private http: HttpClient) {}
}
|
Output:
Example 2: Below is another example code that illustrates the use of Angular PrimeNG ContextMenu Methods using show and hide Methods.
HTML
<div style="text-align: center;">
<h1 style="color: green;">GeeksforGeeks</h1>
<h5>Angular PrimeNG ContextMenu Methods</h5>
</div>
<p-treeTable
[value]="gfg1"
[columns]="selectedColumns"
dataKey="name"
[(contextMenuSelection)]="selectedNode"
[contextMenu]="gf">
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of columns">
{{col.header}}
</th>
</tr>
</ng-template>
<ng-template
pTemplate="body"
let-rowNode
let-rowData="rowData"
let-columns="columns">
<tr [ttContextMenuRow]="rowNode">
<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>
<p-contextMenu #gf [model]="gfg2"></p-contextMenu>
<p-toast [style]="{marginTop: '80px'}"></p-toast>
|
Javascript
import { Component } from "@angular/core";
import { NodeService } from "./nodeservice";
import { TreeNode } from "primeng/api";
import { MessageService, MenuItem } from "primeng/api";
@Component({
selector: "app-root",
templateUrl: "./app.component.html",
providers: [MessageService]
})
export class AppComponent {
gfg1: TreeNode[];
cols: any[];
selectedColumns: any[];
gfg2: MenuItem[];
selectedNode: TreeNode;
constructor(private messageService: MessageService) {}
ngOnInit() {
this.gfg1 = [
{
data: {
name: "A",
age: "40"
},
children: [
{
data: {
name: "B",
age: "16"
}
},
{
data: {
name: "C",
age: "14"
}
}
]
},
{
data: {
name: "D",
age: "55"
},
children: [
{
data: {
name: "E",
age: "20"
}
},
{
data: {
name: "F",
age: "24"
}
}
]
},
{
data: {
name: "G",
age: "32"
},
children: [
{
data: {
name: "H",
age: "20"
}
},
{
data: {
name: "I",
age: "24"
}
}
]
},
{
data: {
name: "J",
age: "64"
},
children: [
{
data: {
name: "K",
age: "20"
}
},
{
data: {
name: "L",
age: "24"
}
}
]
},
{
data: {
name: "M",
age: "12"
},
children: [
{
data: {
name: "N",
age: "20"
}
},
{
data: {
name: "O",
age: "24"
}
}
]
},
{
data: {
name: "P",
age: "34"
},
children: [
{
data: {
name: "Q",
age: "20"
}
},
{
data: {
name: "R",
age: "24"
}
}
]
},
{
data: {
name: "S",
age: "43"
},
children: [
{
data: {
name: "T",
age: "20"
}
},
{
data: {
name: "U",
age: "24"
}
}
]
}
];
this.cols = [
{ field: "name", header: "First Name" },
{ field: "age", header: "Age" }
];
this.selectedColumns = this.cols;
this.gfg2 = [
{
label: "View it Geek",
icon: "pi pi-search",
command: (event) => this.viewGeekFile(this.selectedNode)
}
];
}
viewGeekFile(node) {
this.messageService.add({
severity: "success",
summary: "Selected Cell is: ",
detail: node.data.name
});
}
}
|
Javascript
import { NgModule } from "@angular/core";
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 { ContextMenuModule } from "primeng/contextmenu";
import { ToastModule } from "primeng/toast";
@NgModule({
imports: [
BrowserAnimationsModule,
TreeTableModule,
ContextMenuModule,
HttpClientModule,
ToastModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService]
})
export class AppModule {}
|
Javascript
import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
@Injectable()
export class NodeService {
constructor(private http: HttpClient) {}
}
|
Output:
Reference: https://primefaces.org/primeng/table/contextmenu
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