electron-screenshots-tool
v1.1.2
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electron 截图插件
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electron-screenshots-tool
electron 截图插件
Usage
import { app, globalShortcut } from 'electron'
import Screenshots from './screenshots'
app.whenReady().then(() => {
const screenshots = new Screenshots()
globalShortcut.register('ctrl+shift+a', () => {
screenshots.startCapture()
screenshots.view.webContents.openDevTools()
})
// 点击确定按钮回调事件
screenshots.on('ok', (e, buffer, bounds) => {
console.log('capture', buffer, bounds)
})
// 点击取消按钮回调事件
screenshots.on('cancel', () => {
console.log('capture', 'cancel1')
})
screenshots.on('cancel', (e) => {
// 执行了preventDefault
// 点击取消不会关闭截图窗口
e.preventDefault()
console.log('capture', 'cancel2')
})
// 点击保存按钮回调事件
screenshots.on('save', (e, buffer, bounds) => {
console.log('capture', buffer, bounds)
})
debug({ showDevTools: true, devToolsMode: 'undocked' })
})
app.on('window-all-closed', () => {
if (process.platform !== 'darwin') {
app.quit()
}
})
- 加速截图界面展示,不销毁
BrowserWindow
,减少创建窗口的开销,可用以下代码实现。需注意,启用该功能,会导致window-all-closed
事件不触发,因此需要手动关闭截图窗口
// 是否复用截图窗口,加快截图窗口显示,默认值为 false
// 如果设置为 true 则会在第一次调用截图窗口时创建,后续调用时直接使用
// 且由于窗口不会 close,所以不会触发 app 的 `window-all-closed` 事件
const screenshots = new Screenshots({
singleWindow: true
})
Methods
Debugger
类型产考debug
中的Debugger
类型
export type LoggerFn = (...args: unknown[]) => void
export type Logger = Debugger | LoggerFn
export interface Lang {
magnifierPositionLabel?: string
operationOkTitle?: string
operationCancelTitle?: string
operationSaveTitle?: string
operationRedoTitle?: string
operationUndoTitle?: string
operationMosaicTitle?: string
operationTextTitle?: string
operationBrushTitle?: string
operationArrowTitle?: string
operationEllipseTitle?: string
operationRectangleTitle?: string
}
export interface ScreenshotsOpts {
lang?: Lang
// 调用日志,默认值为 debug('electron-screenshots')
// debug https://www.npmjs.com/package/debug
logger?: Logger
// 是否复用截图窗口,加快截图窗口显示,默认值为 false
// 如果设置为 true 则会在第一次调用截图窗口时创建,后续调用时直接使用
// 且由于窗口不会 close,所以不会触发 app 的 `window-all-closed` 事件
singleWindow?: boolean
}
| 名称 | 说明 | 返回值 |
| ------------------------------------------------- | ---------------- | ------ |
| constructor(opts: ScreenshotsOpts): Screenshots
| 调用截图方法截图 | - |
| startCapture(): Promise<void>
| 调用截图方法截图 | - |
| endCapture(): Promise<void>
| 手动结束截图 | - |
| setLang(lang: Lang): Promise<void>
| 修改语言 | - |
Events
- 数据类型
interface Bounds {
x: number
y: number
width: number
height: number
}
export interface Display {
id: number
x: number
y: number
width: number
height: number
}
export interface ScreenshotsData {
bounds: Bounds
display: Display
}
class Event {
public defaultPrevented = false
public preventDefault(): void {
this.defaultPrevented = true
}
}
| 名称 | 说明 | 回调参数 |
| ------ | ------------ | --------------------------------------------------------------- |
| ok | 截图确认事件 | (event: Event, buffer: Buffer, data: ScreenshotsData) => void
|
| cancel | 截图取消事件 | (event: Event) => void
|
| save | 截图保存事件 | (event: Event, buffer: Buffer, data: ScreenshotsData) => void
|
说明
- event: 事件对象
- buffer: png 图片 buffer
- bounds: 截图区域信息
- display: 截图的屏幕
event
对象可调用preventDefault
方法来阻止默认事件,例如阻止默认保存事件
const screenshots = new Screenshots({
lang: {
magnifierPositionLabel: 'Position',
operationOkTitle: 'Ok',
operationCancelTitle: 'Cancel',
operationSaveTitle: 'Save',
operationRedoTitle: 'Redo',
operationUndoTitle: 'Undo',
operationMosaicTitle: 'Mosaic',
operationTextTitle: 'Text',
operationBrushTitle: 'Brush',
operationArrowTitle: 'Arrow',
operationEllipseTitle: 'Ellipse',
operationRectangleTitle: 'Rectangle'
}
})
screenshots.on('save', (e, buffer, data) => {
// 阻止插件自带的保存功能
// 用户自己控制保存功能
e.preventDefault()
// 用户可在这里自己定义保存功能
console.log('capture', buffer, data)
})
screenshots.startCapture()