Method draw

src/wave-loading.ts:135–146

* 绘制入口：计算进度，绘制波纹等

()

   * 绘制入口：计算进度，绘制波纹等
   */
  protected draw(): void {
    this.calcProgress()

    if (this.progress < 100) {
      this.mainDrawing()
      this.requestAnimationFrame()
    } else {
      this.progress = 100
      this.mainDrawing()
      this.eventEmitter.trigger(EVENT_NAMES_WAVE_LOADING.FINISHED)
    }
  }

  /**
   * 绘制图案