使用angular2上的按钮进行水平滚动 [英] Horizontal Scroll using buttons on angular2

问题描述

所以我在angular2中有这个应用程序，在这里我需要水平滚动组件，但要使用左右按钮.因此，我需要为每个按钮左右滚动内容提供一个功能.我需要这样的东西:

So I have this app in angular2 where I need to scroll a component horizontally but with buttons right and left. So I need a function for each button that scroll to right or left the content. I need something like this:

我尝试使用document.getElementById('myscrolldiv').animate({ scrollLeft: "-=" + 250 + "px"; }，但是Angular无法识别animate行.

I tried using document.getElementById('myscrolldiv').animate({ scrollLeft: "-=" + 250 + "px"; } but Angular does not recognize the animate line.

因此，我正在寻找使用按钮而不是使用jquery进行水平滚动的另一种方式.有什么办法可以做到这一点吗?

So I am looking for a diferent way of scroll horizontally using buttons but NOT using jquery. Is there any way to do this in angular?

这是我的html

<div class="container">
  <div class="side">
    <mat-icon (click)="scrollLeft()">keyboard_arrow_left</mat-icon>
  </div>
  <div id="widgetsContent" class="middle">
    <div class="scrolls">
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
    </div>
  </div>
  <div class="side">
    <mat-icon (click)="scrollRight()">keyboard_arrow_right</mat-icon>
  </div>
</div>

这是我的CSS

.container {
  display: flex;
  height: 22.5vh !important;
}

.side {
  width: 50px;
  height: 22.5vh !important;
}

.middle {
  flex-grow: 1;
  height: 22.5vh !important;
  overflow-x: scroll;
  overflow-y: hidden;
  white-space: nowrap;
}

那么，如何按按钮左右滚动呢?请帮忙.

So, how do I scroll right and left pushing the buttons? please help.

推荐答案

导入ViewChild和ElementRef以获取elemenet信息.

Import ViewChild and ElementRef to get elemenet refrence.

使用#localvariable，如下所示，<div #widgetsContent class="middle">

use #localvariable as shown here, <div #widgetsContent class="middle">

获取组件@ViewChild('widgetsContent', { read: ElementRef }) public widgetsContent: ElementRef<any>;

更改滚动值，this.widgetsContent.nativeElement.scrollTo({ left: (this.widgetsContent.nativeElement.scrollLeft + 150), behavior: 'smooth' });

示例如下所示

import { Component, OnInit, ViewChild, ElementRef } from "@angular/core";

@Component({
    selector: 'my-app',
    template: `
                <div class="container">
                <div style="float: left">
                    <button (click)="scrollLeft()">left</button>
                </div>

                <div #widgetsContent class="middle">
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                </div>

                <div style="float: right">
                    <button (click)="scrollRight()">right</button>
                </div>
                </div>
            `,
    styles: [`
      .info-widget {
        width: 31.75%;
        border: 1px solid black;
        display: inline-block;
      }

      .middle {
        float: left;
        width: 90%;
        overflow: auto;
        /*will change this to hidden later to deny scolling to user*/
        white-space: nowrap;
      }
            `]
})

export class AppComponent { 

  @ViewChild('widgetsContent', { read: ElementRef }) public widgetsContent: ElementRef<any>;

  public scrollRight(): void {
    this.widgetsContent.nativeElement.scrollTo({ left: (this.widgetsContent.nativeElement.scrollLeft + 150), behavior: 'smooth' });
  }

  public scrollLeft(): void {
    this.widgetsContent.nativeElement.scrollTo({ left: (this.widgetsContent.nativeElement.scrollLeft - 150), behavior: 'smooth' });
  }
}

这篇关于使用angular2上的按钮进行水平滚动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！