Angular 5 Material Multiple mat-menu

问题

I am quite new to Angular 5 and have just started learning it.

Recently, I have been trying to create a menu bar with multiple menus for my app using Angular 5 Material.
The menu will be triggered/opened during mouse enter and closed when the mouse leaves the menu.
My problem is that everytime the mouse mouse hovers to the first menu it loads the menu items of the 2nd menu.

Here is a screenshot of the problem:


Here are my codes:
mainmenu.component.html:

<div>
    <button mat-button [matMenuTriggerFor]="menu1" 
      (mouseenter)="openMyMenu()">Trigger1</button>
    <mat-menu #menu1="matMenu" overlapTrigger="false">
        <span (mouseleave)="closeMyMenu()">
            <button mat-menu-item>Item 1</button>
            <button mat-menu-item>Item 2</button>
        </span>
   </mat-menu>
</div>
<div>
    <button mat-button [matMenuTriggerFor]="menu2"
      (mouseenter)="openMyMenu()">Trigger2</button>
    <mat-menu #menu2="matMenu" overlapTrigger="false">
        <span (mouseleave)="closeMyMenu()">
            <button mat-menu-item>Item 3</button>
            <button mat-menu-item>Item 4</button>
        </span>
    </mat-menu>
</div>

mainmenu.component.ts:

import { Component, OnInit, ViewChild } from '@angular/core';
import {MatMenuTrigger} from '@angular/material'

@Component({
  selector: 'app-mainmenu',
  templateUrl: './mainmenu.component.html',
  styleUrls: ['./mainmenu.component.css']
})
export class MainmenuComponent implements OnInit {
  @ViewChild(MatMenuTrigger) matMenuTrigger: MatMenuTrigger;

  constructor() { }

  ngOnInit() {
  }
  openMyMenu() {
    this.matMenuTrigger.openMenu();

  } 
  closeMyMenu() {
    this.matMenuTrigger.closeMenu();
  }
}

I also tried this: @ViewChild('menu1') matMenuTrigger: MatMenuTrigger; but I am getting errors.
Your opinions and advices are very much appreciated!


Thanks,
Artanis Zeratul

References:

• https://coursetro.com/posts/code/113/How-to-Build-an-Angular-5-Material-App
• How to make Material Design Menu (mat-menu) hide on mouseleave

回答1:

I had the same issue.

Create two separate components, each will then contain its own mat-menu and will not affect the other.

<!-- component1 -->
<div>
 <button mat-button [matMenuTriggerFor]="menu1" 
  (mouseenter)="openMyMenu()">Trigger1</button>
 <mat-menu #menu1="matMenu" overlapTrigger="false">
    <span (mouseleave)="closeMyMenu()">
        <button mat-menu-item>Item 1</button>
        <button mat-menu-item>Item 2</button>
    </span>
</mat-menu>
</div>

<!-- component2 -->
<div>
<button mat-button [matMenuTriggerFor]="menu2"
  (mouseenter)="openMyMenu()">Trigger2</button>
<mat-menu #menu2="matMenu" overlapTrigger="false">
    <span (mouseleave)="closeMyMenu()">
        <button mat-menu-item>Item 3</button>
        <button mat-menu-item>Item 4</button>
    </span>
 </mat-menu>
</div>

回答2:

The correct solution for this problem:

@ViewChildren(MatMenuTrigger) trigger: QueryList<MatMenuTrigger>;

//And call:

me.trigger.toArray()[indexOfMenu].openMenu();

回答3:

I have two matmenus in my toolbar each one is a separate component and triggers a separate matmenu.

See images below:

Here is my notifications component(component 1 in the image above) In my editor view :

In my notifications.component.html file :

<button mat-icon-button [matMenuTriggerFor]="notificationsMenu" (mouseover)="openNotifications()">
  <mat-icon class="material-icons ele-text-color-grey">notifications</mat-icon>
</button>

<mat-menu #notificationsMenu="matMenu" [overlapTrigger]="false"></mat-menu>

I don't think it is possible to have two in one component but I hope this helps.

回答4:

<ul class="navbar-nav ml-auto">
  <li class="nav-item dropdown">
      <button mat-button [matMenuTriggerFor]="admin">ADMIN</button>
      <mat-menu #admin="matMenu">
        <button mat-menu-item>User Management</button>
      </mat-menu>
  </li>
  <li class="nav-item dropdown">
      <button mat-button [matMenuTriggerFor]="profile">PROFILE</button>
      <mat-menu #profile="matMenu">
        <button mat-menu-item>Change Password</button>
        <button mat-menu-item>Logout</button>
      </mat-menu>
  </li>

来源：https://stackoverflow.com/questions/51315945/angular-5-material-multiple-mat-menu