registerCallback() {
   ipc.on("execute-command", (event: any, arg: string) => {
     this.execute(event, arg);
     this.history.addCommand(arg);
   });
   ipc.on("last-command", (event: any, arg: string) => {
     event.sender.send('last-history-command', this.history.lastCommand());
   });
   ipc.on("next-command", (event: any, arg: string) => {
     event.sender.send('next-history-command', this.history.nextCommand());
   });
 }

    app.on('ready', () => {
        let win = new BrowserWindow({
            width: app_config.width,
            height: app_config.height,
        });

        win.loadUrl(index_html);

        let fetcher = new TrendFetcher(
                win.webContents,
                app_config.languages,
                app_config.proxy || undefined
            );
        auth.getToken().then((access_token: string) => {
            fetcher.setToken(access_token);
        });

        let app_icon = new Tray(normal_icon);
        const context_menu = Menu.buildFromTemplate([
            {
                label: 'Show Window',
                click: () => win.show(),
            },
            {
                label: 'Force Update',
                click: () => fetcher.doScraping(),
            },
            {
                label: 'Quit',
                accelerator: 'CmdOrCtrl+Q',
                click: () => app.quit(),
            }
        ]);
        app_icon.setContextMenu(context_menu);

        ipc.on('renderer-ready', () => fetcher.start());
        ipc.on('force-update-repos', () => fetcher.doScraping());
        ipc.on('tray-icon-normal', () => app_icon.setImage(normal_icon));
        ipc.on('tray-icon-notified', () => app_icon.setImage(notified_icon));
        ipc.on('start-github-login', () => doLogin(fetcher, win.webContents));

        if (app_config.hot_key !== '') {
            shortcut.register(
                    app_config.hot_key,
                    () => win.isVisible() ? win.hide() : win.show()
                );
        }
    });

 return new Promise(resolve => {
     ipc.on('picked-langs', (event: Event, langs: string[]) => {
         console.log('picked!: ' + JSON.stringify(langs));
         if (langs.length === 0) {
             langs.push('all');
         }
         resolve(langs);
     });
 }).catch(err => {

$( document ).ready((): void => {
  document.title = packageDescription.name;
  editor = new UmlEditor.UmlEditor();

  editor.setDocuments();

  var ipc: any = require("ipc");

  ipc.on("save", () => {
    editor.saveDocument();
  });

  ipc.on("update", () => {
    editor.renderJumlyDocument();
  });

  ipc.on("requestClipboardArea", () => {
    editor.copyToClipboard();
  });
});

    constructor(props: {}) {
        super(props);

        this.application = new Application(this.charSize, this.contentSize);
        this.application.activateTerminal(this.application.terminals[0]);

        this.state = { terminals: this.application.terminals };

        $(window).resize(() => this.application.contentSize = this.contentSize);
        IPC.on('change-working-directory', (directory: string) =>
            this.application.activeTerminal.currentDirectory = directory
        );
    }

    menu_window.on('after-create-window', () => {
        menu_window.tray.setToolTip('Show Menu Window');
        let fetcher = new TrendFetcher(
                menu_window.window.webContents,
                app_config.languages,
                app_config.proxy || undefined
            );
        auth.getToken().then((access_token: string) => {
            fetcher.setToken(access_token);
        });

        ipc.on('renderer-ready', () => fetcher.start());
        ipc.on('force-update-repos', () => fetcher.doScraping());
        ipc.on('tray-icon-normal', () => menu_window.tray.setImage(normal_icon));
        ipc.on('tray-icon-notified', () => menu_window.tray.setImage(notified_icon));
        ipc.on('start-github-login', () => doLogin(fetcher, menu_window.window.webContents));

        if (app_config.hot_key !== '') {
            shortcut.register(
                    app_config.hot_key,
                    () => menu_window.window.isVisible() ? menu_window.hideWindow() : menu_window.showWindow()
                );
        }
    });

	private Ready(): void {
		// create the browser window.
		this.mainWindow = new BrowserWindow({width: 800, height: 800});

		this.BuildMenu();

		// and load the index.html of the app.
		this.mainWindow.loadUrl(this.startURI);

		// emitted when the window is closed.
		this.mainWindow.on("closed", () => {
			// dereference the window object, usually you would store windows
			// in an array if your app supports multi windows, this is the time
			// when you should delete the corresponding element.
			this.mainWindow = null;
		});

		ipc.on("copyToClipboard", (event: any, rect: any) => {
				this.CopyToClipboard(rect);
			}
		);
	}

// report crashes to the Electron project
require('crash-reporter').start();

// prevent window being GC'd
var mainWindow = null;
var shell = null;

app.on('window-all-closed', function () {
	if (process.platform !== 'darwin') {
		app.quit();
	}
});

ipc.on('platform', function(event, arg) {
  event.sender.send('platform', os.platform());
});

ipc.on('load-configuration', function(event, arg) {
  userConfig.loadConfiguration().then((config) => {
    event.sender.send('user-configuration', config);
  });
});

app.on('ready', function () {
	mainWindow = new BrowserWindow({
		width: 1024,
		height: 768,
		resizable: true
	});