gas-injection/src/utils/ui.js

import { ThemeEnum } from '../enums/appEnum';
import { useRootSetting } from '/@/hooks/setting/useRootSetting';
// 中间背景雨
export function rainBg(className, bgClassName) {
  var c = document.querySelector(`.${className}`);
  if (!c) return;
  var ctx = c.getContext('2d'); //获取canvas上下文
  var w = (c.width = document.querySelector(`.${bgClassName}`).clientWidth);
  var h = (c.height = document.querySelector(`.${bgClassName}`).clientHeight);
  //设置canvas宽、高

  function random(min, max) {
    return Math.random() * (max - min) + min;
  }

  function RainDrop() {}
  //雨滴对象 这是绘制雨滴动画的关键
  RainDrop.prototype = {
    init: function () {
      this.x = random(0, w); //雨滴的位置x
      this.y = h; //雨滴的位置y
      this.color = 'hsl(180, 100%, 50%)'; //雨滴颜色 长方形的填充色
      this.vy = random(4, 5); //雨滴下落速度
      this.hit = 0; //下落的最大值
      this.size = 2; //长方形宽度
    },
    draw: function () {
      if (this.y > this.hit) {
        var linearGradient = ctx.createLinearGradient(this.x, this.y, this.x, this.y + this.size * 30);
        // 设置起始颜色
        linearGradient.addColorStop(0, '#14789c');
        // 设置终止颜色
        linearGradient.addColorStop(1, '#090723');
        // 设置填充样式
        ctx.fillStyle = linearGradient;
        ctx.fillRect(this.x, this.y, this.size, this.size * 50); //绘制长方形，通过多次叠加长方形，形成雨滴下落效果
      }
      this.update(); //更新位置
    },
    update: function () {
      if (this.y > this.hit) {
        this.y -= this.vy; //未达到底部，增加雨滴y坐标
      } else {
        this.init();
      }
    },
  };

  function resize() {
    w = c.width = window.innerWidth;
    h = c.height = window.innerHeight;
  }

  //初始化一个雨滴

  var rs = [];
  for (var i = 0; i < 10; i++) {
    setTimeout(function () {
      var r = new RainDrop();
      r.init();
      rs.push(r);
    }, i * 300);
  }

  function anim() {
    ctx.clearRect(0, 0, w, h); //填充背景色，注意不要用clearRect，否则会清空前面的雨滴，导致不能产生叠加的效果
    for (var i = 0; i < rs.length; i++) {
      rs[i].draw(); //绘制雨滴
    }
    requestAnimationFrame(anim); //控制动画帧
  }

  window.addEventListener('resize', resize);
  //启动动画
  anim();
}

export const getAssetURL = (imagePath) => {
  return new URL(`../assets/images/${imagePath}`, import.meta.url).href;
};

export const getThemifyImagesURL = (imagePath) => {
  const { getDarkMode } = useRootSetting();
  switch (getDarkMode.value) {
    case ThemeEnum.DEEPBLUE:
      return new URL(`../assets/images/themify/${getDarkMode.value}/${imagePath}`, import.meta.url).href;

    // case ThemeEnum.LIGHT:
    //   return new URL(`../assets/images/themify/${getDarkMode.value}/${imagePath}`, import.meta.url).href;

    // case ThemeEnum.DARK:
    //   return new URL(`../assets/images/themify/${getDarkMode.value}/${imagePath}`, import.meta.url).href;

    // case ThemeEnum.VENT1:
    //   return new URL(`../assets/images/themify/${getDarkMode.value}/${imagePath}`, import.meta.url).href;

    default:
      return new URL(`../assets/images/${imagePath}`, import.meta.url).href;
  }
};