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Angular.js?實現(xiàn)帶手柄自由調(diào)整頁面大小的功能

更新時間：2023年12月26日 09:28:25 作者：crary,記憶

這篇文章主要介紹了Angular.js?實現(xiàn)帶手柄自由調(diào)整頁面大小的功能,本文通過實例代碼給大家介紹的非常詳細，對大家的學(xué)習(xí)或工作具有一定的參考借鑒價值，需要的朋友可以參考下

因為目前是處于在angular項目中，所以下面分別一個記錄簡易的angular.js和在angular項目中使用的版本，僅供大家參考。

Angular.js

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Resizable Element with Angular Directive</title>
  <style>
    .resizable {
      width: 200px;
      height: 200px;
      background-color: lightgray;
      border: 1px solid #ccc;
      overflow: auto;
      position: relative;
    }
    .resize-handle {
      width: 10px;
      height: 10px;
      background-color: #000;
      position: absolute;
      bottom: 0;
      right: 0;
      cursor: nwse-resize;
    }
  </style>
</head>
<body>
  <div ng-app="resizableApp">
    <div ng-controller="ResizableController">
      <div resizable></div>
    </div>
  </div>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script>
  <script>
    angular.module('resizableApp', [])
      .controller('ResizableController', function($scope) {
        // 可以在這里添加控制器邏輯
      })
      .directive('resizable', function() {
        return {
          restrict: 'A',
          link: function(scope, element) {
            const resizableElement = element[0];
            const resizeHandle = document.createElement('div');
            resizeHandle.classList.add('resize-handle');
            resizableElement.appendChild(resizeHandle);
            let isResizing = false;
            let initialX;
            let initialY;
            let originalWidth;
            let originalHeight;
            resizeHandle.addEventListener('mousedown', function(event) {
              event.preventDefault();
              isResizing = true;
              initialX = event.clientX;
              initialY = event.clientY;
              originalWidth = parseFloat(getComputedStyle(resizableElement, null).getPropertyValue('width'));
              originalHeight = parseFloat(getComputedStyle(resizableElement, null).getPropertyValue('height'));
              document.addEventListener('mousemove', resize);
              document.addEventListener('mouseup', stopResize);
            });
            function resize(event) {
              if (isResizing) {
                const width = originalWidth + (event.clientX - initialX);
                const height = originalHeight + (event.clientY - initialY);
                resizableElement.style.width = width + 'px';
                resizableElement.style.height = height + 'px';
              }
            }
            function stopResize() {
              isResizing = false;
              document.removeEventListener('mousemove', resize);
              document.removeEventListener('mouseup', stopResize);
            }
          }
        };
      });
  </script>
</body>
</html>

在Angular項目中

在 Angular 項目中可以將上述功能作為 Angular 指令在組件中使用。

首先，創(chuàng)建一個名為 `resizable` 的自定義指令

import { Directive, ElementRef, HostListener } from '@angular/core';
@Directive({
  selector: '[resizable]'
})
export class ResizableDirective {
  private isResizing = false;
  private initialX: number;
  private initialY: number;
  private originalWidth: number;
  private originalHeight: number;
  constructor(private elementRef: ElementRef) {}
  @HostListener('document:mousemove', ['$event'])
  onMouseMove(event: MouseEvent) {
    if (this.isResizing) {
      const width = this.originalWidth + (event.clientX - this.initialX);
      const height = this.originalHeight + (event.clientY - this.initialY);
      this.elementRef.nativeElement.style.width = width + 'px';
      this.elementRef.nativeElement.style.height = height + 'px';
    }
  }
  @HostListener('document:mouseup')
  onMouseUp() {
    this.isResizing = false;
  }
  @HostListener('mousedown', ['$event'])
  onMouseDown(event: MouseEvent) {
    event.preventDefault();
    this.isResizing = true;
    this.initialX = event.clientX;
    this.initialY = event.clientY;
    this.originalWidth = parseFloat(getComputedStyle(this.elementRef.nativeElement).getPropertyValue('width'));
    this.originalHeight = parseFloat(getComputedStyle(this.elementRef.nativeElement).getPropertyValue('height'));
  }
}

在組件模板中使用該指令

<div resizable class="resizable"></div>

最后，將 `ResizableDirective` 添加到您的 Angular 模塊中

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { ResizableDirective } from './resizable.directive';
import { AppComponent } from './app.component';
@NgModule({
  declarations: [
    AppComponent,
    ResizableDirective
  ],
  imports: [
    BrowserModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

到此這篇關(guān)于Angular.js 實現(xiàn)帶手柄自由調(diào)整頁面大小的功能的文章就介紹到這了,更多相關(guān)Angular.js調(diào)整頁面大小內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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