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@likg/brush

v1.0.1

Published

画笔工具

Downloads

1

Readme

概述

@likg/brush 基于 canvas 实现,主要提供画笔相关的常用方法,有关画板工具栏的布局,请自行根据产品需求设计。

本库兼容【PC】端和【Mobile】端,后续会不间断地更新和完善。

提示:如果你想搞懂实现原理,欢迎阅读我在稀土掘金的文章:浅谈 js+canvas 实现画板工具 >>

安装

$ pnpm install @likg/brush

使用

import Brush from '@likg/brush';
const brush = new Brush(BrushOptions)

APIs

  • mount(options: BrushMountOptions):挂载画笔
  • destroy():卸载画笔
  • clear():清空画板
  • setBrushThickness(thickness: number):设置画笔粗细
  • setBrushColor(color: string):设置画笔颜色
  • undo():撤销(上一步)
  • redo():重做(下一步)
  • getHistories():获取历史纪录
  • saveToImage(options?: BrushImageOptions):保存图片
  • setEraserStatus(status: boolean):设置橡皮擦状态

Typings

BrushOptions

type BrushOptions = {
  /** ID */
  id?: string;
  /** 画笔颜色(初始) */
  color?: string;
  /** 画笔粗细(初始) */
  thickness?: number;
  /** 生命周期内临时保留画板内容 */
  storage?: boolean;
  /** 绘画记录·最大长度(默认值 50) */
  maxHistoriesLength?: number;
  /** 开始绘制回调 */
  onDrawBegin?: () => void;
  /** 结束绘制回调 */
  onDrawEnd?: () => void;
}

BrushMountOptions

type BrushMountOptions = {
  /** 目标元素 */
  target?: HTMLElement;
}

BrushImageOptions

type BrushImageOptions = {
  type: string;
  filename: string;
  quality: any;
}