Question

我正在阅读Pluralsight上的Electron Fundamentals课程（Trent，2016）。我不能让加速器在我的＆＃34; Quit＆＃34;菜单项。下面是我的整个main.js文件。菜单是根据我所知道的（下图）成功创建的，直接单击Quit菜单项会关闭应用程序，但Alt + W组合键不会。我在Windows 10上。我错过了什么？

Single Page Apps for GitHub Pages

Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
    at idmas.controller.modules.tableview.CellFactoryCustom.setConditionalFormatting(CellFactoryCustom.java:110)
    at idmas.controller.modules.tableview.CellFactoryCustom$1.updateItem(CellFactoryCustom.java:60)
    at javafx.scene.control.TableCell.updateItem(TableCell.java:663)
    at javafx.scene.control.TableCell.indexChanged(TableCell.java:468)
    at javafx.scene.control.IndexedCell.updateIndex(IndexedCell.java:116)
    at com.sun.javafx.scene.control.skin.TableRowSkinBase.requestCellUpdate(TableRowSkinBase.java:659)
    at com.sun.javafx.scene.control.skin.TableRowSkinBase.handleControlPropertyChanged(TableRowSkinBase.java:234)
    at com.sun.javafx.scene.control.skin.TableRowSkin.handleControlPropertyChanged(TableRowSkin.java:70)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase.lambda$registerChangeListener$61(BehaviorSkinBase.java:197)
    at com.sun.javafx.scene.control.MultiplePropertyChangeListenerHandler$1.changed(MultiplePropertyChangeListenerHandler.java:55)
    at javafx.beans.value.WeakChangeListener.changed(WeakChangeListener.java:89)
    at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
    at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
    at javafx.beans.property.ReadOnlyIntegerPropertyBase.fireValueChangedEvent(ReadOnlyIntegerPropertyBase.java:72)
    at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:102)
    at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:113)
    at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:147)
    at javafx.scene.control.IndexedCell.updateIndex(IndexedCell.java:115)
    at com.sun.javafx.scene.control.skin.VirtualFlow.setCellIndex(VirtualFlow.java:1957)
    at com.sun.javafx.scene.control.skin.VirtualFlow.addTrailingCells(VirtualFlow.java:1344)
    at com.sun.javafx.scene.control.skin.VirtualFlow.layoutChildren(VirtualFlow.java:1197)
    at javafx.scene.Parent.layout(Parent.java:1087)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Parent.layout(Parent.java:1093)
    at javafx.scene.Scene.doLayoutPass(Scene.java:552)
    at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2397)
    at com.sun.javafx.tk.Toolkit.lambda$runPulse$30(Toolkit.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.Toolkit.runPulse(Toolkit.java:354)
    at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:381)
    at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:510)
    at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:490)
    at com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$404(QuantumToolkit.java:319)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

在Windows上看起来需要BrowserWindow上加载的东西。放置loadURL使其有效。除了loadURL之外，还需要尝试一些东西..

app.on('ready', _ => {
    mainWindow = new BrowserWindow()

    mainWindow.loadURL('https://github.com')

   const name = electron.app.getName()

    const template = [
        {
            label: name,
            submenu: [{
                label: `About ${name}` ,
                click: console.log('clicked!')
            },{
                type:'separator'
            },{
                label:'Quit',
                click: _ =>{
                    app.quit()                    
                },
                accelerator:'CmdOrCtrl+Q'
            }
            ]
        }        
    ]

    const menu = Menu.buildFromTemplate(template)
    Menu.setApplicationMenu(menu)
     })

Answer 2

文档在过去一年中发生了变化，不再需要accelerator。现在，您使用globalShortcut定义快捷方式。

Accelerator Documentation：使用register方法向globalShortcut模块注册快捷方式，即

const {app, globalShortcut} = require('electron')

app.on('ready', () => {
  // Register a 'CommandOrControl+Y' shortcut listener.
  globalShortcut.register('CommandOrControl+Y', () => {
    // Do stuff when Y and either Command/Control is pressed.
  })
})

请将您的代码更改为

const electron = require('electron');

const app = electron.app;
const BrowserWindow = electron.BrowserWindow;
const Menu = electron.Menu;
const globalShortcut = electron.globalShortcut;

app.on('ready', _ => {
    new BrowserWindow();

    // Declare shortcuts
    globalShortcut.register('Alt+W', () => app.quit());

    const template = [
    {
        label: "File",
        submenu: [{
            label: 'About',
            click: _ => {
                console.log('clicked');
            }
        },
        {
            type: 'separator'
        },
        {
            label: 'Quit',
            click: _ => {
                app.quit();
            }
        }]
    }];

    const menu = Menu.buildFromTemplate(template);
    Menu.setApplicationMenu(menu);
});

电子菜单加速器不工作

2 个答案: