当按下“ esc”时退出全屏（使用带电子的javascript）

Question

我正在使用电子设备开发应用程序，我希望用户在按“ esc”时能够退出全屏模式。我徒劳地尝试了不同的方法。这是在全屏模式下在新浏览器窗口中启动应用并显示和HTML / CSS内容的代码：

    'use strict';

const electron = require('electron');
// Module to control application life.
const app = electron.app;
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow;

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;

function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({fullscreen:true});

  // and load the index.html of the app.
  mainWindow.loadURL('file://' + __dirname + '/index.html');

  // Emitted when the window is closed.
  mainWindow.on('closed', function() {
    // 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.
    mainWindow = null;
  });
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
app.on('ready', createWindow);

// Quit when all windows are closed.
app.on('window-all-closed', function () {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {
    app.quit();
  }
});

app.on('activate', function () {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) {
    createWindow();
  }
});

这是我要添加到此代码中的内容，以能够退出全屏显示，但它不起作用：

app.on('keydown', function(e){
    if(e.keyCode === 27){
      app.exitFullscreen();
    }
});

我也尝试过使用“ cancelFullscreen”。和“全屏：假”。无法运作。

非常感谢您的关注！

Answer 1

非常容易。在渲染过程中添加键盘侦听器，然后通过remote模块操纵窗口。

    const remote = require("electron").remote;

    document.addEventListener("keydown", event => {

        switch (event.key) {
            case "Escape":
                if (remote.getCurrentWindow().isFullScreen()) {
                    remote.getCurrentWindow().setFullScreen(false);
                }
                break;
             }
    });

Answer 2

这里是对我有用的解决方案：

function minimizeWindow () {
    mainWindow.setFullScreen(false);
    console.log(mainWindow);
}

app.on('ready', function() {

  const ret = electron.globalShortcut.register('Escape', function(){
    console.log('Escape is pressed');

        minimizeWindow();
  });

console.log(electron.globalShortcut.isRegistered('Escape'));
});

app.on('will-quit', function(){

  electron.globalShortcut.unregister('Escape');

  electron.globalShortcut.unregisterAll();
});

• 该窗口的属性和方法的文档：http://electron.atom.io/docs/api/browser-window/#winsetmaximizablemaximizable-macos-windows
• 键盘事件的文档：http://electron.atom.io/docs/api/global-shortcut/

Answer 3

也有一些问题，只需为转义键创建一个侦听器并将其放在里面，我建议不要将其放入电子的主文件或渲染器文件中。

 
const { remote } = require('electron');
const { BrowserWindow } = remote;

document.addEventListener("keydown", event => {

        switch (event.key) {
            case "Escape":
                var window = BrowserWindow.getFocusedWindow();
            if(window.isMaximized()){
             window.unmaximize();
           }else{
             window.maximize();
           };
                break;
             }
    });

Answer 4

全局快捷键会捕获所有事件，最好使用隐藏的菜单按钮。例如，您可以使用以下菜单项添加菜单：

{
      label: "Exit full screen",
      visible: false,
      accelerator: "Esc",
      click(item, focusedWindow) {
        if (focusedWindow.isFullScreen()) {
          focusedWindow.setFullScreen(false);
        }
      },
    },

您可以使用电子的setApplicationMenu命令应用新菜单项：https://www.electronjs.org/docs/api/menu#menusetapplicationmenumenu