メニュー

menu := app.Menu.New()

menuItem := menu.Add("Click Me")

checkbox := menu.AddCheckbox("My checkbox", true)  // true = initially checked

menu.AddRadio("Option 1", true)   // true = initially selected
menu.AddRadio("Option 2", false)
menu.AddRadio("Option 3", false)

menu.AddSeparator()

submenu := menu.AddSubmenu("File")
submenu.Add("Open")
submenu.Add("Save")

menu := app.Menu.New()
menu.Add("First Menu")

secondaryMenu := app.Menu.New()
secondaryMenu.Add("Second Menu")

// insert 'secondaryMenu' after 'menu'
menu.Append(secondaryMenu)

// insert 'secondaryMenu' before 'menu'
menu.Prepend(secondaryMenu)

// update the menu
menu.Update()

menu := app.Menu.New()
menu.Add("Waiting for update...")

// after certain logic, the menu has to be updated
menu.Clear()
menu.Add("Update complete!")
menu.Update()

menu := app.Menu.New()
menu.Add("Waiting for update...")

// after certain logic, the menu has to be destroyed
menu.Destroy()

menuItem := menu.Add("Dynamic Item")

// Hide the menu item
menuItem.SetHidden(true)

// Show the menu item
menuItem.SetHidden(false)

// Check current visibility
isHidden := menuItem.Hidden()

menuItem := menu.Add("Save")

// Disable the menu item
menuItem.SetEnabled(false)  // Item appears grayed out and cannot be clicked

// Enable the menu item
menuItem.SetEnabled(true)   // Item becomes clickable again

// Check current enabled state
isEnabled := menuItem.Enabled()

saveMenuItem := menu.Add("Save")

// Initially disable the Save menu item
saveMenuItem.SetEnabled(false)

// Enable Save only when there are unsaved changes
documentChanged := func() {
    saveMenuItem.SetEnabled(true)
    menu.Update()  // Remember to update the menu after changing states
}

// Disable Save after saving
documentSaved := func() {
    saveMenuItem.SetEnabled(false)
    menu.Update()
}

menuItem.OnClick(func(ctx *application.Context) {
    // Handle the click event
    println("Menu item clicked!")
})

menuItem.OnClick(func(ctx *application.Context) {
    // Get the clicked menu item
    clickedItem := ctx.ClickedMenuItem()
    // Get its current state
    isChecked := clickedItem.Checked()
})

menu := app.Menu.New()

// Add complete menu structures
menu.AddRole(application.AppMenu)    // macOS only
menu.AddRole(application.EditMenu)   // Common edit operations
menu.AddRole(application.ViewMenu)   // View controls
menu.AddRole(application.WindowMenu) // Window controls

// Add individual role-based items to a custom menu
fileMenu := menu.AddSubmenu("File")
fileMenu.AddRole(application.CloseWindow)
fileMenu.AddSeparator()
fileMenu.AddRole(application.Quit)

app.Window.NewWithOptions(application.WebviewWindowOptions{
    Title: "Custom Menu Window",
    Windows: application.WindowsWindow{
        Menu: customMenu,  // Override application menu for this window
    },
})

func main() {
    app := application.New(application.Options{})

    // Create application menu
    appMenu := app.Menu.New()
    fileMenu := appMenu.AddSubmenu("File")
    fileMenu.Add("New").OnClick(func(ctx *application.Context) {
        // This will be available in all windows unless overridden
        window := app.Window.Current()
        window.SetTitle("New Window")
    })
    
    // Set as application menu - this is for macOS
    app.Menu.Set(appMenu)

    // Window with custom menu on Windows
    customMenu := app.Menu.New()
    customMenu.Add("Custom Action")
    app.Window.NewWithOptions(application.WebviewWindowOptions{
        Title: "Custom Menu",
        Windows: application.WindowsWindow{
            Menu: customMenu,
        },
    })

    app.Run()
}

<!-- Always show default context menu -->
<div style="--default-contextmenu: show">
    <input type="text" placeholder="Right-click for text operations"/>
    <textarea>Standard text operations available here</textarea>
</div>

<!-- Hide default context menu -->
<div style="--default-contextmenu: hide">
    <div class="custom-component">Custom context menu only</div>
</div>

<!-- Smart context menu behaviour (default) -->
<div style="--default-contextmenu: auto">
    <!-- Shows default menu when text is selected or in input fields -->
    <p>Select this text to see the default menu</p>
    <input type="text" placeholder="Default menu for input operations"/>
</div>

<!-- Parent sets hide -->
<div style="--default-contextmenu: hide">
    <!-- This inherits hide -->
    <p>No context menu here</p>
    
    <!-- This overrides to show -->
    <div style="--default-contextmenu: show">
        <p>Context menu shown here</p>
        
        <!-- This inherits show -->
        <span>Also has context menu</span>
        
        <!-- This resets to automatic behaviour -->
        <div style="--default-contextmenu: auto">
            <p>Shows menu only when text is selected</p>
        </div>
    </div>
</div>

// Create a context menu with identifier "imageMenu"
contextMenu := app.ContextMenu.New()
app.ContextMenu.Add("imageMenu", contextMenu)

contextMenu.Add("Process").OnClick(func(ctx *application.Context) {
    // Get the clicked menu item
    menuItem := ctx.ClickedMenuItem()
    
    // Get the context data as a string
    contextData := ctx.ContextMenuData()
    
    // Check if the menu item is checked (for checkbox/radio items)
    isChecked := ctx.IsChecked()
    
    // Use the data
    if contextData != "" {
        processItem(contextData)
    }
})

contextMenu.Update()

contextMenu.Destroy()

// Backend: Create the context menu
imageMenu := app.ContextMenu.New()
app.ContextMenu.Add("imageMenu", imageMenu)

// Add relevant operations
imageMenu.Add("View Full Size").OnClick(func(ctx *application.Context) {
    // Get the image ID from context data
    if imageID := ctx.ContextMenuData(); imageID != "" {
        openFullSizeImage(imageID)
    }
})

imageMenu.Add("Download").OnClick(func(ctx *application.Context) {
    if imageID := ctx.ContextMenuData(); imageID != "" {
        downloadImage(imageID)
    }
})

imageMenu.Add("Share").OnClick(func(ctx *application.Context) {
    if imageID := ctx.ContextMenuData(); imageID != "" {
        showShareDialog(imageID)
    }
})

<!-- Frontend: Image gallery implementation -->
<div class="gallery">
    <!-- Each image container with context menu -->
    <div class="image-container" 
         style="--custom-contextmenu: imageMenu; --custom-contextmenu-data: img_123">
        <img src="/images/img_123.jpg" alt="Gallery Image"/>
        <span class="caption">Nature Photo</span>
    </div>
    
    <div class="image-container"
         style="--custom-contextmenu: imageMenu; --custom-contextmenu-data: img_124">
        <img src="/images/img_124.jpg" alt="Gallery Image"/>
        <span class="caption">City Photo</span>
    </div>
</div>