如何捕获在Electron应用程序中单击应用程序窗口的关闭按钮的事件

Question

我希望能够在Electron应用程序中点击应用程序窗口的关闭按钮.

我正在尝试为Mac OSX开发Electron应用程序.我想隐藏应用程序窗口,而不是在用户像其他Mac应用程序一样单击窗口的关闭按钮时终止应用程序.

但是,我无法检测到系统应该被终止还是应该被隐藏,因为在任何情况下,当单击关闭按钮时调用close事件browser-window,操作系统将关闭或应用程序以quit命令终止Cmd+Q.

有没有办法在Electron应用程序中点击应用程序窗口的关闭按钮？

谢谢您的帮助.

---

后记

要检测单击关闭按钮的事件,我尝试了此代码

var app = require('app');
var BrowserWindow = require('browser-window');
var Menu = require('menu');

var force_quit = false;

var menu = Menu.buildFromTemplate([
  {
    label: 'Sample',
    submenu: [
      {label: 'About App', selector: 'orderFrontStandardAboutPanel:'},
      {label: 'Quit', accelerator: 'CmdOrCtrl+Q', click: function() {force_quit=true; app.quit();}}
    ]
  }]);

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

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

    Menu.setApplicationMenu(menu);

    mainWindow = new BrowserWindow({width:800, height:600});

    mainWindow.on('close', function(e){
        if(!force_quit){
            e.preventDefault();
            mainWindow.hide();
        }
    });

    mainWindow.on('closed', function(){
        console.log("closed");
        mainWindow = null;
        app.quit();
    });

    app.on('activate-with-no-open-windows', function(){
        mainWindow.show();
    });
});

使用此代码,当单击应用程序窗口的关闭按钮时,将隐藏应用程序,并在Cmd+Q键入时终止应用程序.但是,当我尝试关闭操作系统时,会阻止关闭事件.

Answer 1

您可以使用浏览器窗口 api 的close事件来捕获它.您可以尝试以下方法来验证这一点......

var app = require('app');

var force_quit = false;

app.on('ready', function () {        
    mainWindow = new BrowserWindow({ width: 800, height: 600 });

    mainWindow.on('close', function() { //   <---- Catch close event

        // The dialog box below will open, instead of your app closing.
        require('dialog').showMessageBox({
            message: "Close button has been pressed!",
            buttons: ["OK"]
        });
    });
});

更新:

要分离功能,您可以执行以下操作...

var app = require('app');
var BrowserWindow = require('browser-window');
var Menu = require('menu');

var force_quit = false;
var menu = Menu.buildFromTemplate([
{
    label: 'Sample',
    submenu: [
        {label: 'About App', selector: 'orderFrontStandardAboutPanel:'},
        {
            label: 'Quit', 
            accelerator: 'CmdOrCtrl+Q', 
            click: function() { 
                force_quit=true; app.quit();
            }
        }
    ]
}]);

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

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

    Menu.setApplicationMenu(menu);

    mainWindow = new BrowserWindow({width:800, height:600});

    // Continue to handle mainWindow "close" event here
    mainWindow.on('close', function(e){
        if(!force_quit){
            e.preventDefault();
            mainWindow.hide();
        }
    });

    // You can use 'before-quit' instead of (or with) the close event
    app.on('before-quit', function (e) {
        // Handle menu-item or keyboard shortcut quit here
        if(!force_quit){
            e.preventDefault();
            mainWindow.hide();
        }
    });

    // Remove mainWindow.on('closed'), as it is redundant

    app.on('activate-with-no-open-windows', function(){
        mainWindow.show();
    });
});

// This is another place to handle events after all windows are closed
app.on('will-quit', function () {
    // This is a good place to add tests insuring the app is still
    // responsive and all windows are closed.
    console.log("will-quit");
    mainWindow = null;
});

上面的代码使用before-quit 事件处理程序来处理app api上的app"close"事件.浏览器窗口"关闭"事件仍然在浏览器窗口api上处理mainWindow.on('close').

此外,在will-quit应用完全关闭之前,事件是测试问题的更好地方.