Angular.js 实现带手柄自由调整页面大小的功能

        因为目前是处于在angular项目中,所以下面分别一个记录简易的angular.js和在angular项目中使用的版本,仅供大家参考。

Angular.js




  
  
  Resizable Element with Angular Directive
  


  

在Angular项目中

        在 Angular 项目中可以将上述功能作为 Angular 指令在组件中使用。

  1. 首先,创建一个名为 `resizable` 的自定义指令
    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'));
      }
    }
  2. 在组件模板中使用该指令
  3. 最后,将 `ResizableDirective` 添加到您的 Angular 模块中
    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 { }
    

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