react-screenshots

a screenshot cropper tool by react

Install

Usage

1. web 中使用

import React, { ReactElement, useCallback } from "react";
import Screenshots, { Bounds } from "react-screenshots";
import url from "./image.jpg";

interface Bounds {
  x: number;
  y: number;
  width: number;
  height: number;
}

export default function App(): ReactElement {
  const onSave = useCallback((blob: Blob, bounds: Bounds) => {
    console.log("save", blob, bounds);
    console.log(URL.createObjectURL(blob));
  }, []);
  const onCancel = useCallback(() => {
    console.log("cancel");
  }, []);
  const onOk = useCallback((blob: Blob, bounds: Bounds) => {
    console.log("ok", blob, bounds);
    console.log(URL.createObjectURL(blob));
  }, []);

  return (
    <Screenshots
      url={url}
      width={window.innerWidth}
      height={window.innerHeight}
      lang={{
        operation_undo_title: "Undo",
        operation_mosaic_title: "Mosaic",
        operation_text_title: "Text",
        operation_brush_title: "Brush",
        operation_arrow_title: "Arrow",
        operation_ellipse_title: "Ellipse",
        operation_rectangle_title: "Rectangle",
      }}
      onSave={onSave}
      onCancel={onCancel}
      onOk={onOk}
    />
  );
}

2. electron 中使用

• electron 中使用可直接加载渲染进程的页面，页面路径为require.resolve('react-screenshots/electron/electron.html')，不推荐自己手动开发主进程，推荐直接使用electron-screenshots模块

interface ScreenshotsData {
  bounds: Bounds
  display: Display
}

interface GlobalScreenshots {
  ready: () => void
  reset: () => void
  save: (arrayBuffer: ArrayBuffer, data: ScreenshotsData) => void
  cancel: () => void
  ok: (arrayBuffer: ArrayBuffer, data: ScreenshotsData) => void
  on: (channel: string, fn: ScreenshotsListener) => void
  off: (channel: string, fn: ScreenshotsListener) => void
}

// 需要在electron的preload中提前初始化这个对象，用于渲染进程与主进程通信
window.screenshots: GlobalScreenshots

Props

interface Bounds {
  x: number;
  y: number;
  width: number;
  height: number;
}

interface Lang {
  magnifier_position_label: string;
  operation_ok_title: string;
  operation_cancel_title: string;
  operation_save_title: string;
  operation_redo_title: string;
  operation_undo_title: string;
  operation_mosaic_title: string;
  operation_text_title: string;
  operation_brush_title: string;
  operation_arrow_title: string;
  operation_ellipse_title: string;
  operation_rectangle_title: string;
}

名称	说明	类型	是否必选
url	要编辑的图像资源地址	string	是
width	画布宽度	number	是
height	画布宽度	number	是
lang	多语言支持，默认中文	Partial<Lang>	否
onSave	保存按钮回调	(blob: Blob, bounds: Bounds) => void	否
onCancel	取消按钮回调	() => void	否
onOk	取消按钮回调	(blob: Blob, bounds: Bounds) => void	否

example

import React from "react";

function App() {
  return (
    <Screenshot
      url="./example.png"
      width={window.innerWidth}
      height={window.innerHeight}
      onSave={() => {}}
      onCancel={() => {}}
      onOk={() => {}}
    />
  );
}

Screenshot

Icons

Iconfont