Основы работы с окнами

package main

import "github.com/wailsapp/wails/v3/pkg/application"

func main() {
    app := application.New(application.Options{
        Name: "My App",
    })

    // Create a window
    window := app.Window.New()
    
    // Configure it
    window.SetTitle("Hello Wails")
    window.SetSize(800, 600)
    window.Center()
    
    // Show it
    window.Show()

    app.Run()
}

window := app.Window.New()

window := app.Window.NewWithOptions(application.WebviewWindowOptions{
    Title:  "My Application",
    Width:  1200,
    Height: 800,
    X:      100,   // Position from left
    Y:      100,   // Position from top
    AlwaysOnTop: false,
    Frameless: false,
    Hidden: false,
    MinWidth: 400,
    MinHeight: 300,
    MaxWidth: 1920,
    MaxHeight: 1080,
})

window := app.Window.NewWithOptions(application.WebviewWindowOptions{
    Name:  "main-window",
    Title: "Main Application",
})

// Later, find it by name
if mainWindow, ok := app.Window.GetByName("main-window"); ok {
    mainWindow.Show()
}

// Show window
window.Show()

// Hide window
window.Hide()

// Check if visible
if window.IsVisible() {
    fmt.Println("Window is visible")
}

// Set size
window.SetSize(1024, 768)

// Set position
window.SetPosition(100, 100)

// Centre on screen
window.Center()

// Get current size
width, height := window.Size()

// Get current position
x, y := window.Position()

// Minimise
window.Minimise()

// Maximise
window.Maximise()

// Fullscreen
window.Fullscreen()

// Restore to normal
window.Restore()

// Check state
if window.IsMinimised() {
    fmt.Println("Window is minimised")
}

if window.IsMaximised() {
    fmt.Println("Window is maximised")
}

if window.IsFullscreen() {
    fmt.Println("Window is fullscreen")
}

Normal ←→ Minimised
Normal ←→ Maximised
Normal ←→ Fullscreen

// Set title
window.SetTitle("My Application - Document.txt")

// Set background colour — RGBA value (helper for RGB)
window.SetBackgroundColour(application.NewRGBA(0, 0, 0, 255))

// Set always on top
window.SetAlwaysOnTop(true)

// Set resizable
window.SetResizable(false)

// Close window — dispatches WindowClosing; a RegisterHook can call e.Cancel().
window.Close()

if window, ok := app.Window.GetByName("settings"); ok {
    window.Show()
}

id := window.ID()
fmt.Printf("Window ID: %d\n", id)

// Find by ID
if found, ok := app.Window.GetByID(id); ok {
    found.Focus()
}

current := app.Window.Current()
if current != nil {
    current.SetTitle("Active Window")
}

windows := app.Window.GetAll()
fmt.Printf("Total windows: %d\n", len(windows))

for _, w := range windows {
    fmt.Printf("Window: %s (ID: %d)\n", w.Name(), w.ID())
}

app.Window.OnCreate(func(window application.Window) {
    fmt.Printf("Window created: %s\n", window.Name())

    // Configure new windows
    window.SetMinSize(400, 300)
})

window.RegisterHook(events.Common.WindowClosing, func(event *application.WindowEvent) {
    if hasUnsavedChanges() {
        // Ask user for confirmation
        result := showConfirmDialog("Unsaved changes. Close anyway?")
        if result != "yes" {
            // Cancel the close event
            event.Cancel()
        }
    }
})

window.OnWindowEvent(events.Common.WindowClosing, func(event *application.WindowEvent) {
    fmt.Println("Window is closing")
    // Cleanup resources
})

// Main window
mainWindow := app.Window.NewWithOptions(application.WebviewWindowOptions{
    Name:   "main",
    Title:  "Main Application",
    Width:  1200,
    Height: 800,
})

// Settings window
settingsWindow := app.Window.NewWithOptions(application.WebviewWindowOptions{
    Name:   "settings",
    Title:  "Settings",
    Width:  600,
    Height: 400,
    Hidden: true,  // Start hidden
})

// Show settings when needed
settingsWindow.Show()

// In main window
app.Event.Emit("data-updated", map[string]interface{}{
    "value": 42,
})

// In settings window
app.Event.On("data-updated", func(event *application.CustomEvent) {
    data := event.Data.(map[string]interface{})
    value := data["value"].(int)
    fmt.Printf("Received: %d\n", value)
})

// Create child window
childWindow := app.Window.NewWithOptions(application.WebviewWindowOptions{
    Title: "Child Window",
})

// Attach to the parent — presents as a sheet on macOS.
mainWindow.AttachModal(childWindow)

// Create splash screen
splash := app.Window.NewWithOptions(application.WebviewWindowOptions{
    Title:     "Loading...",
    Width:     400,
    Height:    300,
    Frameless: true,
    AlwaysOnTop: true,
})

// Show splash
splash.Show()

// Initialise application
time.Sleep(2 * time.Second)

// Hide splash, show main window
splash.Close()
mainWindow.Show()

var settingsWindow *application.WebviewWindow

func showSettings() {
    if settingsWindow == nil {
        settingsWindow = app.Window.NewWithOptions(application.WebviewWindowOptions{
            Name:   "settings",
            Title:  "Settings",
            Width:  600,
            Height: 400,
        })
    }
    
    settingsWindow.Show()
    settingsWindow.Focus()
}

window.RegisterHook(events.Common.WindowClosing, func(event *application.WindowEvent) {
    if hasUnsavedChanges() {
        // Show dialog
        result := showConfirmDialog("Unsaved changes. Close anyway?")
        if result != "yes" {
            // Cancel the close event
            event.Cancel()
        }
    }
})

window.Show()
window.Center()
window.Focus()

// Wails handles DPI automatically
// Just use logical pixels
window.SetSize(800, 600)

app := application.New(application.Options{
    Mac: application.MacOptions{
        ApplicationShouldTerminateAfterLastWindowClosed: false,
    },
})