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readme.md

electron-window-state Build Status

A library to store and restore window sizes and positions for your Electron app

Heavily influenced by the implementation in electron-boilerplate.

Install

$ npm install --save electron-window-state

Usage

const windowStateKeeper = require('electron-window-state');
let win;

app.on('ready', function () {
  // Load the previous state with fallback to defaults
  let mainWindowState = windowStateKeeper({
    defaultWidth: 1000,
    defaultHeight: 800
  });

  // Create the window using the state information
  win = new BrowserWindow({
    'x': mainWindowState.x,
    'y': mainWindowState.y,
    'width': mainWindowState.width,
    'height': mainWindowState.height
  });

  // Let us register listeners on the window, so we can update the state
  // automatically (the listeners will be removed when the window is closed)
  // and restore the maximized or full screen state
  mainWindowState.manage(win);
});

API

windowStateKeeper(opts)

Note: Don't call this function before the ready event is fired.

opts

defaultWidth - Number

The width that should be returned if no file exists yet. Defaults to 800.

defaultHeight - Number

The height that should be returned if no file exists yet. Defaults to 600.

path - String

The path where the state file should be written to. Defaults to app.getPath('userData')

file - String

The name of file. Defaults to window-state.json

maximize - Boolean

Should we automatically maximize the window, if it was last closed maximized. Defaults to true

fullScreen - Boolean

Should we automatically restore the window to full screen, if it was last closed full screen. Defaults to true

state object

const windowState = windowStateKeeper({
  defaultWidth: 1000,
  defaultHeight: 800
});

x - Number

The saved x coordinate of the loaded state. undefined if the state has not been saved yet.

y - Number

The saved y coordinate of the loaded state. undefined if the state has not been saved yet.

width - Number

The saved width of loaded state. defaultWidth if the state has not been saved yet.

height - Number

The saved heigth of loaded state. defaultHeight if the state has not been saved yet.

isMaximized - Boolean

true if the window state was saved while the the window was maximized. undefined if the state has not been saved yet.

isFullScreen - Boolean

true if the window state was saved while the the window was in full screen mode. undefined if the state has not been saved yet.

manage(window) - Function

Register listeners on the given BrowserWindow for events that are related to size or position changes (resize, move). It will also restore the window's maximized or full screen state. When the window is closed we automatically remove the listeners and save the state.

unmanage - Function

Removes all listeners of the managed BrowserWindow in case it does not need to be managed anymore.

saveState(window) - Function

Saves the current state of the given BrowserWindow. This exists mostly for legacy purposes, and in most cases it's better to just use manage.

License

MIT © Marcel Wiehle