mirror of
https://github.com/wailsapp/wails.git
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docs: Comprehensive API Reference documentation with event tables and examples
- Restructured API Reference to use flat file structure instead of subdirectories - Added complete API documentation for all major Wails v3 APIs - Created comprehensive event tables documenting all built-in system events - Fixed incorrect window lifecycle methods (OnClose/OnFocus/OnBlur don't exist) - Replaced with correct OnWindowEvent() and RegisterHook() implementations - Added detailed explanations of Common Events vs Platform-Native Events - Expanded Frontend Runtime API with complete method signatures and examples - Added comprehensive Dialogs, Menu, and Events API documentation - Included practical code examples for Go and JavaScript throughout - Documented event patterns with use case descriptions - Removed placeholder content and "Best Practices" sections - Made Go API Conventions collapsible with beginner-friendly intro text 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
parent
b2b1abd3ce
commit
3f1e16dcfb
13 changed files with 3834 additions and 709 deletions
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@ -266,41 +266,13 @@ export default defineConfig({
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collapsed: true,
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items: [
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{ label: "Overview", link: "/reference/overview" },
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{
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label: "Application",
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collapsed: true,
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autogenerate: { directory: "reference/application" },
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},
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{
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label: "Window",
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collapsed: true,
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autogenerate: { directory: "reference/window" },
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},
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{
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label: "Menu",
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collapsed: true,
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autogenerate: { directory: "reference/menu" },
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},
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{
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label: "Events",
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collapsed: true,
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autogenerate: { directory: "reference/events" },
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},
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{
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label: "Dialogs",
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collapsed: true,
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autogenerate: { directory: "reference/dialogs" },
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},
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{
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label: "Runtime",
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collapsed: true,
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autogenerate: { directory: "reference/runtime" },
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},
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{
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label: "CLI",
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collapsed: true,
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autogenerate: { directory: "reference/cli" },
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},
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{ label: "Application", link: "/reference/application" },
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{ label: "Window", link: "/reference/window" },
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{ label: "Menu", link: "/reference/menu" },
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{ label: "Events", link: "/reference/events" },
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{ label: "Dialogs", link: "/reference/dialogs" },
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{ label: "Frontend Runtime", link: "/reference/frontend-runtime" },
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{ label: "CLI", link: "/reference/cli" },
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],
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},
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@ -277,7 +277,7 @@ cd myapp && wails3 dev
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## Next Steps
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Next: [Build a complete application](/tutorials/03-notes-vanilla), browse [examples](https://github.com/wailsapp/wails/tree/v3-alpha/v3/examples), or check the [API reference](/reference/application-api). Migrating from v2? See the [upgrade guide](/migration/v2-to-v3).
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Next: [Build a complete application](/tutorials/03-notes-vanilla), browse [examples](https://github.com/wailsapp/wails/tree/v3-alpha/v3/examples), or check the [API reference](/reference/application). Migrating from v2? See the [upgrade guide](/migration/v2-to-v3).
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:::note[Production Ready]
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@ -389,103 +389,30 @@ import (
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"github.com/wailsapp/wails/v3/pkg/application"
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)
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type App struct {
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app *application.Application
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}
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func NewApp(app *application.Application) *App {
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return &App{app: app}
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}
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func (a *App) Startup() {
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// Listen for events
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a.app.OnEvent("data-updated", func(e *application.CustomEvent) {
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a.app.Logger.Info("Data updated", "data", e.Data)
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})
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// Listen for shutdown
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a.app.OnApplicationEvent(application.EventApplicationShutdown, func(e *application.ApplicationEvent) {
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a.app.Logger.Info("Shutting down")
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// Cleanup
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})
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}
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func (a *App) ShowMessage(message string) {
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a.app.InfoDialog().
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SetTitle("Message").
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SetMessage(message).
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Show()
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}
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func (a *App) GetData() string {
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// Get clipboard
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text, _ := a.app.Clipboard.Text()
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return text
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}
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func main() {
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app := application.New(application.Options{
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Name: "My App",
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Services: []application.Service{
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application.NewService(NewApp(app)),
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Name: "My Application",
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Description: "A demo application",
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Mac: application.MacOptions{
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ApplicationShouldTerminateAfterLastWindowClosed: true,
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},
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})
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app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
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Title: "My App",
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Width: 800,
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Height: 600,
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// Create main window
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window := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
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Title: "My App",
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Width: 1024,
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Height: 768,
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MinWidth: 800,
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MinHeight: 600,
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BackgroundColour: application.NewRGB(255, 255, 255),
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URL: "http://wails.localhost/",
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})
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window.Centre()
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window.Show()
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app.Run()
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}
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```
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## Best Practices
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### ✅ Do
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- **Store app reference** - Keep in service structs
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- **Use managers** - Access features through managers
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- **Handle errors** - Check dialog results
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- **Use logger** - Structured logging
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- **Clean up** - Use shutdown hooks
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### ❌ Don't
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- **Don't block Run()** - It's the event loop
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- **Don't ignore errors** - Handle all errors
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- **Don't create multiple apps** - One per process
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- **Don't call Quit() in startup** - Let app initialize
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## Next Steps
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<CardGrid>
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<Card title="Window API" icon="laptop">
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Complete window management reference.
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[Learn More →](/reference/window-api)
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</Card>
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<Card title="Services" icon="puzzle">
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Learn about service architecture.
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[Learn More →](/features/bindings/services)
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</Card>
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<Card title="Events" icon="star">
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Master the event system.
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[Learn More →](/features/events/system)
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</Card>
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<Card title="dialogs" icon="information">
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Use native dialogs.
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[Learn More →](/features/dialogs/overview)
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</Card>
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</CardGrid>
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---
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**Questions?** Ask in [Discord](https://discord.gg/JDdSxwjhGf) or check the [examples](https://github.com/wailsapp/wails/tree/v3-alpha/v3/examples).
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28
docs/src/content/docs/reference/cli.mdx
Normal file
28
docs/src/content/docs/reference/cli.mdx
Normal file
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@ -0,0 +1,28 @@
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---
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title: CLI Reference
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description: Complete reference for the Wails CLI commands
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sidebar:
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order: 1
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---
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## Overview
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The Wails CLI (`wails3`) provides commands for creating, developing, building, and managing Wails applications.
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## Coming Soon
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This section is under construction. For now, use `wails3 --help` or `wails3 [command] --help` for command documentation.
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**Common commands:**
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```bash
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wails3 init # Create a new project
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wails3 dev # Run in development mode
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wails3 build # Build for production
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wails3 generate # Generate bindings or runtime
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wails3 doctor # Check development environment
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```
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---
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**Questions?** Ask in [Discord](https://discord.gg/JDdSxwjhGf) or check the [examples](https://github.com/wailsapp/wails/tree/v3-alpha/v3/examples).
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791
docs/src/content/docs/reference/dialogs.mdx
Normal file
791
docs/src/content/docs/reference/dialogs.mdx
Normal file
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@ -0,0 +1,791 @@
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---
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title: Dialogs API
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description: Complete reference for native dialog APIs
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sidebar:
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order: 5
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---
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import { Card, CardGrid } from "@astrojs/starlight/components";
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## Overview
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The Dialogs API provides methods to show native file dialogs and message dialogs.
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**Dialog Types:**
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- **File Dialogs** - Open, Save, and Select Folder dialogs
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- **Message Dialogs** - Info, Error, Warning, and Question dialogs
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All dialogs are **native OS dialogs** that match the platform's look and feel.
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## File Dialogs
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### OpenFileDialog()
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Creates a file open dialog.
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```go
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func (a *App) OpenFileDialog() *OpenFileDialog
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```
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**Example:**
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```go
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dialog := app.OpenFileDialog()
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```
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### OpenFileDialog Methods
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#### SetTitle()
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Sets the dialog title.
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```go
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func (d *OpenFileDialog) SetTitle(title string) *OpenFileDialog
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```
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**Example:**
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```go
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dialog.SetTitle("Select Image")
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```
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#### SetFilters()
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Sets file type filters.
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```go
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func (d *OpenFileDialog) SetFilters(filters []FileFilter) *OpenFileDialog
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```
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**FileFilter structure:**
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```go
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type FileFilter struct {
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DisplayName string // "Images", "Documents", etc.
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Pattern string // "*.png;*.jpg", "*.pdf;*.doc", etc.
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}
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```
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**Example:**
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```go
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dialog.SetFilters([]application.FileFilter{
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{DisplayName: "Images", Pattern: "*.png;*.jpg;*.gif"},
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{DisplayName: "Documents", Pattern: "*.pdf;*.docx"},
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{DisplayName: "All Files", Pattern: "*.*"},
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})
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```
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#### SetDefaultDirectory()
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Sets the initial directory.
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```go
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func (d *OpenFileDialog) SetDefaultDirectory(path string) *OpenFileDialog
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```
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**Example:**
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```go
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homeDir, _ := os.UserHomeDir()
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dialog.SetDefaultDirectory(homeDir)
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```
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#### PromptForSingleSelection()
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Shows the dialog and returns the selected file.
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```go
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func (d *OpenFileDialog) PromptForSingleSelection() (string, error)
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```
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**Returns:**
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- `string` - Selected file path
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- `error` - Error if cancelled or failed
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**Example:**
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```go
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path, err := app.OpenFileDialog().
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SetTitle("Select Image").
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SetFilters([]application.FileFilter{
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{DisplayName: "Images", Pattern: "*.png;*.jpg;*.gif"},
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}).
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PromptForSingleSelection()
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if err != nil {
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// User cancelled or error occurred
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return
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}
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// Use the selected file
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processFile(path)
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```
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#### PromptForMultipleSelection()
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Shows the dialog and returns multiple selected files.
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```go
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func (d *OpenFileDialog) PromptForMultipleSelection() ([]string, error)
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```
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**Returns:**
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- `[]string` - Array of selected file paths
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- `error` - Error if cancelled or failed
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**Example:**
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```go
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paths, err := app.OpenFileDialog().
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SetTitle("Select Images").
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SetFilters([]application.FileFilter{
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{DisplayName: "Images", Pattern: "*.png;*.jpg"},
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}).
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PromptForMultipleSelection()
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if err != nil {
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return
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}
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for _, path := range paths {
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processFile(path)
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}
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```
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### SaveFileDialog()
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Creates a file save dialog.
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```go
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func (a *App) SaveFileDialog() *SaveFileDialog
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```
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**Example:**
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```go
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dialog := app.SaveFileDialog()
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```
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### SaveFileDialog Methods
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#### SetTitle()
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Sets the dialog title.
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```go
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func (d *SaveFileDialog) SetTitle(title string) *SaveFileDialog
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```
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#### SetDefaultFilename()
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Sets the default filename.
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```go
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func (d *SaveFileDialog) SetDefaultFilename(filename string) *SaveFileDialog
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```
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**Example:**
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```go
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dialog.SetDefaultFilename("document.pdf")
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```
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|
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#### SetFilters()
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Sets file type filters (same as OpenFileDialog).
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|
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```go
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func (d *SaveFileDialog) SetFilters(filters []FileFilter) *SaveFileDialog
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```
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|
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#### SetDefaultDirectory()
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Sets the initial directory (same as OpenFileDialog).
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|
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```go
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func (d *SaveFileDialog) SetDefaultDirectory(path string) *SaveFileDialog
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```
|
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|
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#### PromptForSingleSelection()
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Shows the dialog and returns the save path.
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```go
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func (d *SaveFileDialog) PromptForSingleSelection() (string, error)
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```
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|
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**Example:**
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```go
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path, err := app.SaveFileDialog().
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SetTitle("Save Document").
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SetDefaultFilename("untitled.pdf").
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SetFilters([]application.FileFilter{
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{DisplayName: "PDF Document", Pattern: "*.pdf"},
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}).
|
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PromptForSingleSelection()
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||||
|
||||
if err != nil {
|
||||
// User cancelled
|
||||
return
|
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}
|
||||
|
||||
// Save to the selected path
|
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saveDocument(path)
|
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```
|
||||
|
||||
### SelectFolderDialog()
|
||||
|
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Creates a folder selection dialog.
|
||||
|
||||
```go
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func (a *App) SelectFolderDialog() *SelectFolderDialog
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||||
```
|
||||
|
||||
**Example:**
|
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```go
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||||
dialog := app.SelectFolderDialog()
|
||||
```
|
||||
|
||||
### SelectFolderDialog Methods
|
||||
|
||||
#### SetTitle()
|
||||
|
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Sets the dialog title.
|
||||
|
||||
```go
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func (d *SelectFolderDialog) SetTitle(title string) *SelectFolderDialog
|
||||
```
|
||||
|
||||
#### SetDefaultDirectory()
|
||||
|
||||
Sets the initial directory.
|
||||
|
||||
```go
|
||||
func (d *SelectFolderDialog) SetDefaultDirectory(path string) *SelectFolderDialog
|
||||
```
|
||||
|
||||
#### PromptForSingleSelection()
|
||||
|
||||
Shows the dialog and returns the selected folder.
|
||||
|
||||
```go
|
||||
func (d *SelectFolderDialog) PromptForSingleSelection() (string, error)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
path, err := app.SelectFolderDialog().
|
||||
SetTitle("Select Output Folder").
|
||||
PromptForSingleSelection()
|
||||
|
||||
if err != nil {
|
||||
// User cancelled
|
||||
return
|
||||
}
|
||||
|
||||
// Use the selected folder
|
||||
outputDir = path
|
||||
```
|
||||
|
||||
## Message Dialogs
|
||||
|
||||
### InfoDialog()
|
||||
|
||||
Creates an information dialog.
|
||||
|
||||
```go
|
||||
func (a *App) InfoDialog() *InfoDialog
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
dialog := app.InfoDialog()
|
||||
```
|
||||
|
||||
### InfoDialog Methods
|
||||
|
||||
#### SetTitle()
|
||||
|
||||
Sets the dialog title.
|
||||
|
||||
```go
|
||||
func (d *InfoDialog) SetTitle(title string) *InfoDialog
|
||||
```
|
||||
|
||||
#### SetMessage()
|
||||
|
||||
Sets the dialog message.
|
||||
|
||||
```go
|
||||
func (d *InfoDialog) SetMessage(message string) *InfoDialog
|
||||
```
|
||||
|
||||
#### Show()
|
||||
|
||||
Shows the dialog.
|
||||
|
||||
```go
|
||||
func (d *InfoDialog) Show()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
app.InfoDialog().
|
||||
SetTitle("Success").
|
||||
SetMessage("File saved successfully!").
|
||||
Show()
|
||||
```
|
||||
|
||||
### ErrorDialog()
|
||||
|
||||
Creates an error dialog.
|
||||
|
||||
```go
|
||||
func (a *App) ErrorDialog() *ErrorDialog
|
||||
```
|
||||
|
||||
**Methods:** Same as InfoDialog (SetTitle, SetMessage, Show)
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
app.ErrorDialog().
|
||||
SetTitle("Error").
|
||||
SetMessage("Failed to save file: " + err.Error()).
|
||||
Show()
|
||||
```
|
||||
|
||||
### WarningDialog()
|
||||
|
||||
Creates a warning dialog.
|
||||
|
||||
```go
|
||||
func (a *App) WarningDialog() *WarningDialog
|
||||
```
|
||||
|
||||
**Methods:** Same as InfoDialog (SetTitle, SetMessage, Show)
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
app.WarningDialog().
|
||||
SetTitle("Warning").
|
||||
SetMessage("This action cannot be undone.").
|
||||
Show()
|
||||
```
|
||||
|
||||
### QuestionDialog()
|
||||
|
||||
Creates a question dialog with custom buttons.
|
||||
|
||||
```go
|
||||
func (a *App) QuestionDialog() *QuestionDialog
|
||||
```
|
||||
|
||||
### QuestionDialog Methods
|
||||
|
||||
#### SetTitle()
|
||||
|
||||
Sets the dialog title.
|
||||
|
||||
```go
|
||||
func (d *QuestionDialog) SetTitle(title string) *QuestionDialog
|
||||
```
|
||||
|
||||
#### SetMessage()
|
||||
|
||||
Sets the dialog message.
|
||||
|
||||
```go
|
||||
func (d *QuestionDialog) SetMessage(message string) *QuestionDialog
|
||||
```
|
||||
|
||||
#### SetButtons()
|
||||
|
||||
Sets the button labels.
|
||||
|
||||
```go
|
||||
func (d *QuestionDialog) SetButtons(buttons ...string) *QuestionDialog
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `buttons` - Variable number of button labels
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
dialog.SetButtons("Yes", "No")
|
||||
dialog.SetButtons("Save", "Don't Save", "Cancel")
|
||||
```
|
||||
|
||||
#### SetDefaultButton()
|
||||
|
||||
Sets which button is the default (activated by pressing Enter).
|
||||
|
||||
```go
|
||||
func (d *QuestionDialog) SetDefaultButton(index int) *QuestionDialog
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Make "Yes" the default button
|
||||
dialog.SetButtons("Yes", "No").SetDefaultButton(0)
|
||||
```
|
||||
|
||||
#### SetCancelButton()
|
||||
|
||||
Sets which button is the cancel button (activated by pressing Escape).
|
||||
|
||||
```go
|
||||
func (d *QuestionDialog) SetCancelButton(index int) *QuestionDialog
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Make "Cancel" the cancel button
|
||||
dialog.SetButtons("Save", "Don't Save", "Cancel").SetCancelButton(2)
|
||||
```
|
||||
|
||||
#### Show()
|
||||
|
||||
Shows the dialog and returns the selected button.
|
||||
|
||||
```go
|
||||
func (d *QuestionDialog) Show() (string, error)
|
||||
```
|
||||
|
||||
**Returns:**
|
||||
- `string` - The label of the button that was clicked
|
||||
- `error` - Error if dialog failed to show
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
result, err := app.QuestionDialog().
|
||||
SetTitle("Confirm").
|
||||
SetMessage("Do you want to save changes?").
|
||||
SetButtons("Save", "Don't Save", "Cancel").
|
||||
SetDefaultButton(0).
|
||||
SetCancelButton(2).
|
||||
Show()
|
||||
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
switch result {
|
||||
case "Save":
|
||||
saveDocument()
|
||||
case "Don't Save":
|
||||
// Continue without saving
|
||||
case "Cancel":
|
||||
return
|
||||
}
|
||||
```
|
||||
|
||||
## Complete Examples
|
||||
|
||||
### File Selection Example
|
||||
|
||||
```go
|
||||
type FileService struct {
|
||||
app *application.Application
|
||||
}
|
||||
|
||||
func (s *FileService) OpenImage() (string, error) {
|
||||
path, err := s.app.OpenFileDialog().
|
||||
SetTitle("Select Image").
|
||||
SetFilters([]application.FileFilter{
|
||||
{DisplayName: "Images", Pattern: "*.png;*.jpg;*.jpeg;*.gif"},
|
||||
{DisplayName: "All Files", Pattern: "*.*"},
|
||||
}).
|
||||
PromptForSingleSelection()
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return path, nil
|
||||
}
|
||||
|
||||
func (s *FileService) SaveDocument(defaultName string) (string, error) {
|
||||
path, err := s.app.SaveFileDialog().
|
||||
SetTitle("Save Document").
|
||||
SetDefaultFilename(defaultName).
|
||||
SetFilters([]application.FileFilter{
|
||||
{DisplayName: "PDF Document", Pattern: "*.pdf"},
|
||||
{DisplayName: "Text Document", Pattern: "*.txt"},
|
||||
}).
|
||||
PromptForSingleSelection()
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return path, nil
|
||||
}
|
||||
|
||||
func (s *FileService) SelectOutputFolder() (string, error) {
|
||||
path, err := s.app.SelectFolderDialog().
|
||||
SetTitle("Select Output Folder").
|
||||
PromptForSingleSelection()
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return path, nil
|
||||
}
|
||||
```
|
||||
|
||||
### Confirmation Dialog Example
|
||||
|
||||
```go
|
||||
func (s *Service) DeleteItem(id string) error {
|
||||
// Confirm before deleting
|
||||
result, err := s.app.QuestionDialog().
|
||||
SetTitle("Confirm Delete").
|
||||
SetMessage("Are you sure you want to delete this item?").
|
||||
SetButtons("Delete", "Cancel").
|
||||
SetDefaultButton(1). // Default to Cancel
|
||||
SetCancelButton(1).
|
||||
Show()
|
||||
|
||||
if err != nil || result == "Cancel" {
|
||||
return nil // User cancelled
|
||||
}
|
||||
|
||||
// Perform deletion
|
||||
return deleteFromDatabase(id)
|
||||
}
|
||||
```
|
||||
|
||||
### Save Changes Dialog
|
||||
|
||||
```go
|
||||
func (s *Editor) PromptSaveChanges() (bool, error) {
|
||||
result, err := s.app.QuestionDialog().
|
||||
SetTitle("Unsaved Changes").
|
||||
SetMessage("Do you want to save your changes before closing?").
|
||||
SetButtons("Save", "Don't Save", "Cancel").
|
||||
SetDefaultButton(0).
|
||||
SetCancelButton(2).
|
||||
Show()
|
||||
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
|
||||
switch result {
|
||||
case "Save":
|
||||
return s.Save()
|
||||
case "Don't Save":
|
||||
return true, nil
|
||||
case "Cancel":
|
||||
return false, nil
|
||||
}
|
||||
|
||||
return false, nil
|
||||
}
|
||||
```
|
||||
|
||||
### Multi-File Processing
|
||||
|
||||
```go
|
||||
func (s *Service) ProcessMultipleFiles() error {
|
||||
// Select multiple files
|
||||
paths, err := s.app.OpenFileDialog().
|
||||
SetTitle("Select Files to Process").
|
||||
SetFilters([]application.FileFilter{
|
||||
{DisplayName: "Images", Pattern: "*.png;*.jpg"},
|
||||
}).
|
||||
PromptForMultipleSelection()
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if len(paths) == 0 {
|
||||
s.app.InfoDialog().
|
||||
SetTitle("No Files Selected").
|
||||
SetMessage("Please select at least one file.").
|
||||
Show()
|
||||
return nil
|
||||
}
|
||||
|
||||
// Process files
|
||||
for i, path := range paths {
|
||||
err := processFile(path)
|
||||
if err != nil {
|
||||
s.app.ErrorDialog().
|
||||
SetTitle("Processing Error").
|
||||
SetMessage(fmt.Sprintf("Failed to process %s: %v", path, err)).
|
||||
Show()
|
||||
continue
|
||||
}
|
||||
|
||||
// Show progress
|
||||
s.app.EmitEvent("progress", map[string]interface{}{
|
||||
"current": i + 1,
|
||||
"total": len(paths),
|
||||
})
|
||||
}
|
||||
|
||||
// Show completion
|
||||
s.app.InfoDialog().
|
||||
SetTitle("Complete").
|
||||
SetMessage(fmt.Sprintf("Successfully processed %d files", len(paths))).
|
||||
Show()
|
||||
|
||||
return nil
|
||||
}
|
||||
```
|
||||
|
||||
### Error Handling with Dialogs
|
||||
|
||||
```go
|
||||
func (s *Service) SaveFile(data []byte) error {
|
||||
// Select save location
|
||||
path, err := s.app.SaveFileDialog().
|
||||
SetTitle("Save File").
|
||||
SetDefaultFilename("data.json").
|
||||
SetFilters([]application.FileFilter{
|
||||
{DisplayName: "JSON File", Pattern: "*.json"},
|
||||
}).
|
||||
PromptForSingleSelection()
|
||||
|
||||
if err != nil {
|
||||
// User cancelled - not an error
|
||||
return nil
|
||||
}
|
||||
|
||||
// Attempt to save
|
||||
err = os.WriteFile(path, data, 0644)
|
||||
if err != nil {
|
||||
// Show error dialog
|
||||
s.app.ErrorDialog().
|
||||
SetTitle("Save Failed").
|
||||
SetMessage(fmt.Sprintf("Could not save file: %v", err)).
|
||||
Show()
|
||||
return err
|
||||
}
|
||||
|
||||
// Show success
|
||||
s.app.InfoDialog().
|
||||
SetTitle("Success").
|
||||
SetMessage("File saved successfully!").
|
||||
Show()
|
||||
|
||||
return nil
|
||||
}
|
||||
```
|
||||
|
||||
### Platform-Specific Defaults
|
||||
|
||||
```go
|
||||
import (
|
||||
"os"
|
||||
"path/filepath"
|
||||
"runtime"
|
||||
)
|
||||
|
||||
func (s *Service) GetDefaultDirectory() string {
|
||||
homeDir, _ := os.UserHomeDir()
|
||||
|
||||
switch runtime.GOOS {
|
||||
case "windows":
|
||||
return filepath.Join(homeDir, "Documents")
|
||||
case "darwin":
|
||||
return filepath.Join(homeDir, "Documents")
|
||||
case "linux":
|
||||
return filepath.Join(homeDir, "Documents")
|
||||
default:
|
||||
return homeDir
|
||||
}
|
||||
}
|
||||
|
||||
func (s *Service) OpenWithDefaults() (string, error) {
|
||||
return s.app.OpenFileDialog().
|
||||
SetTitle("Open File").
|
||||
SetDefaultDirectory(s.GetDefaultDirectory()).
|
||||
SetFilters([]application.FileFilter{
|
||||
{DisplayName: "All Files", Pattern: "*.*"},
|
||||
}).
|
||||
PromptForSingleSelection()
|
||||
}
|
||||
```
|
||||
|
||||
## Best Practices
|
||||
|
||||
### ✅ Do
|
||||
|
||||
- **Use native dialogs** - They match the platform's look and feel
|
||||
- **Provide clear titles** - Help users understand the purpose
|
||||
- **Set appropriate filters** - Guide users to correct file types
|
||||
- **Handle cancellation** - Check for errors (user may cancel)
|
||||
- **Show confirmation for destructive actions** - Use QuestionDialog
|
||||
- **Provide feedback** - Use InfoDialog for success messages
|
||||
- **Set sensible defaults** - Default directory, filename, etc.
|
||||
|
||||
### ❌ Don't
|
||||
|
||||
- **Don't ignore errors** - User cancellation returns an error
|
||||
- **Don't use ambiguous button labels** - "OK" vs "Save"/"Cancel"
|
||||
- **Don't overuse dialogs** - They interrupt workflow
|
||||
- **Don't show errors for cancellation** - It's a normal action
|
||||
- **Don't forget file filters** - Help users find the right files
|
||||
- **Don't hardcode paths** - Use os.UserHomeDir() or similar
|
||||
|
||||
## Dialog Types by Platform
|
||||
|
||||
### macOS
|
||||
|
||||
- Dialogs slide down from title bar
|
||||
- "Sheet" style attached to parent window
|
||||
- Native macOS appearance
|
||||
|
||||
### Windows
|
||||
|
||||
- Standard Windows dialogs
|
||||
- Follows Windows design guidelines
|
||||
- Modern Windows 10/11 appearance
|
||||
|
||||
### Linux
|
||||
|
||||
- GTK dialogs on GTK-based systems
|
||||
- Qt dialogs on Qt-based systems
|
||||
- Matches desktop environment
|
||||
|
||||
## Common Patterns
|
||||
|
||||
### "Save As" Pattern
|
||||
|
||||
```go
|
||||
func (s *Service) SaveAs(currentPath string) (string, error) {
|
||||
// Extract filename from current path
|
||||
filename := filepath.Base(currentPath)
|
||||
|
||||
// Show save dialog
|
||||
path, err := s.app.SaveFileDialog().
|
||||
SetTitle("Save As").
|
||||
SetDefaultFilename(filename).
|
||||
PromptForSingleSelection()
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return path, nil
|
||||
}
|
||||
```
|
||||
|
||||
### "Open Recent" Pattern
|
||||
|
||||
```go
|
||||
func (s *Service) OpenRecent(recentPath string) error {
|
||||
// Check if file still exists
|
||||
if _, err := os.Stat(recentPath); os.IsNotExist(err) {
|
||||
result, _ := s.app.QuestionDialog().
|
||||
SetTitle("File Not Found").
|
||||
SetMessage("The file no longer exists. Remove from recent files?").
|
||||
SetButtons("Remove", "Cancel").
|
||||
Show()
|
||||
|
||||
if result == "Remove" {
|
||||
s.removeFromRecent(recentPath)
|
||||
}
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
return s.openFile(recentPath)
|
||||
}
|
||||
```
|
||||
801
docs/src/content/docs/reference/events.mdx
Normal file
801
docs/src/content/docs/reference/events.mdx
Normal file
|
|
@ -0,0 +1,801 @@
|
|||
---
|
||||
title: Events API
|
||||
description: Complete reference for the Events API
|
||||
sidebar:
|
||||
order: 4
|
||||
---
|
||||
|
||||
import { Card, CardGrid } from "@astrojs/starlight/components";
|
||||
|
||||
## Overview
|
||||
|
||||
The Events API provides methods to emit and listen to events, enabling communication between different parts of your application.
|
||||
|
||||
**Event Types:**
|
||||
- **Application Events** - App lifecycle events (startup, shutdown)
|
||||
- **Window Events** - Window state changes (focus, blur, resize)
|
||||
- **Custom Events** - User-defined events for app-specific communication
|
||||
|
||||
**Communication Patterns:**
|
||||
- **Go to Frontend** - Emit events from Go, listen in JavaScript
|
||||
- **Frontend to Go** - Not directly (use service bindings instead)
|
||||
- **Frontend to Frontend** - Via Go or local runtime events
|
||||
- **Window to Window** - Target specific windows or broadcast to all
|
||||
|
||||
## Event Methods (Go)
|
||||
|
||||
### EmitEvent()
|
||||
|
||||
Emits a custom event to all windows.
|
||||
|
||||
```go
|
||||
func (a *App) EmitEvent(name string, data ...interface{})
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `name` - Event name
|
||||
- `data` - Optional data to send with the event
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Emit simple event
|
||||
app.EmitEvent("user-logged-in")
|
||||
|
||||
// Emit with data
|
||||
app.EmitEvent("data-updated", map[string]interface{}{
|
||||
"count": 42,
|
||||
"status": "success",
|
||||
})
|
||||
|
||||
// Emit multiple values
|
||||
app.EmitEvent("progress", 75, "Processing files...")
|
||||
```
|
||||
|
||||
### OnEvent()
|
||||
|
||||
Listens for custom events in Go.
|
||||
|
||||
```go
|
||||
func (a *App) OnEvent(name string, callback func(*CustomEvent)) func()
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `name` - Event name to listen for
|
||||
- `callback` - Function called when event is emitted
|
||||
|
||||
**Returns:** Cleanup function to remove the event listener
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Listen for events
|
||||
cleanup := app.OnEvent("user-action", func(e *application.CustomEvent) {
|
||||
data := e.Data.(map[string]interface{})
|
||||
action := data["action"].(string)
|
||||
app.Logger.Info("User action", "action", action)
|
||||
})
|
||||
|
||||
// Later, remove listener
|
||||
cleanup()
|
||||
```
|
||||
|
||||
### Window-Specific Events
|
||||
|
||||
Emit events to a specific window:
|
||||
|
||||
```go
|
||||
// Emit to specific window
|
||||
window.EmitEvent("notification", "Hello from Go!")
|
||||
|
||||
// Emit to all windows
|
||||
app.EmitEvent("global-update", data)
|
||||
```
|
||||
|
||||
## Event Methods (Frontend)
|
||||
|
||||
### On()
|
||||
|
||||
Listens for events from Go.
|
||||
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
On(eventName, callback)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `eventName` - Name of the event to listen for
|
||||
- `callback` - Function called when event is received
|
||||
|
||||
**Returns:** Cleanup function
|
||||
|
||||
**Example:**
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
// Listen for events
|
||||
const cleanup = On('data-updated', (data) => {
|
||||
console.log('Count:', data.count)
|
||||
console.log('Status:', data.status)
|
||||
updateUI(data)
|
||||
})
|
||||
|
||||
// Later, remove listener
|
||||
cleanup()
|
||||
```
|
||||
|
||||
### Once()
|
||||
|
||||
Listens for a single event occurrence.
|
||||
|
||||
```javascript
|
||||
import { Once } from '@wailsio/runtime'
|
||||
|
||||
Once(eventName, callback)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```javascript
|
||||
import { Once } from '@wailsio/runtime'
|
||||
|
||||
// Listen for first occurrence only
|
||||
Once('initialization-complete', (data) => {
|
||||
console.log('App initialized!', data)
|
||||
// This will only fire once
|
||||
})
|
||||
```
|
||||
|
||||
### Off()
|
||||
|
||||
Removes an event listener.
|
||||
|
||||
```javascript
|
||||
import { Off } from '@wailsio/runtime'
|
||||
|
||||
Off(eventName, callback)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```javascript
|
||||
import { On, Off } from '@wailsio/runtime'
|
||||
|
||||
const handler = (data) => {
|
||||
console.log('Event received:', data)
|
||||
}
|
||||
|
||||
// Start listening
|
||||
On('my-event', handler)
|
||||
|
||||
// Stop listening
|
||||
Off('my-event', handler)
|
||||
```
|
||||
|
||||
### OffAll()
|
||||
|
||||
Removes all listeners for an event.
|
||||
|
||||
```javascript
|
||||
import { OffAll } from '@wailsio/runtime'
|
||||
|
||||
OffAll(eventName)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```javascript
|
||||
// Remove all listeners for this event
|
||||
OffAll('data-updated')
|
||||
```
|
||||
|
||||
## Application Events
|
||||
|
||||
### OnApplicationEvent()
|
||||
|
||||
Listens for application lifecycle events.
|
||||
|
||||
```go
|
||||
func (a *App) OnApplicationEvent(eventType ApplicationEventType, callback func(*ApplicationEvent)) func()
|
||||
```
|
||||
|
||||
**Event Types:**
|
||||
- `EventApplicationStarted` - Application has started
|
||||
- `EventApplicationShutdown` - Application is shutting down
|
||||
- `EventApplicationDebug` - Debug event (dev mode only)
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Handle application startup
|
||||
app.OnApplicationEvent(application.EventApplicationStarted, func(e *application.ApplicationEvent) {
|
||||
app.Logger.Info("Application started")
|
||||
// Initialize resources
|
||||
})
|
||||
|
||||
// Handle application shutdown
|
||||
app.OnApplicationEvent(application.EventApplicationShutdown, func(e *application.ApplicationEvent) {
|
||||
app.Logger.Info("Application shutting down")
|
||||
// Cleanup resources, save state
|
||||
database.Close()
|
||||
saveSettings()
|
||||
})
|
||||
```
|
||||
|
||||
## Window Events
|
||||
|
||||
### OnWindowEvent()
|
||||
|
||||
Listens for window-specific events.
|
||||
|
||||
```go
|
||||
func (w *Window) OnWindowEvent(eventType WindowEventType, callback func(*WindowEvent)) func()
|
||||
```
|
||||
|
||||
**Event Types:**
|
||||
- `EventWindowFocus` - Window gained focus
|
||||
- `EventWindowBlur` - Window lost focus
|
||||
- `EventWindowClose` - Window is closing
|
||||
- `EventWindowResize` - Window was resized
|
||||
- `EventWindowMove` - Window was moved
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Handle window focus
|
||||
window.OnWindowEvent(application.EventWindowFocus, func(e *application.WindowEvent) {
|
||||
app.Logger.Info("Window focused")
|
||||
})
|
||||
|
||||
// Handle window resize
|
||||
window.OnWindowEvent(application.EventWindowResize, func(e *application.WindowEvent) {
|
||||
width, height := window.Size()
|
||||
app.Logger.Info("Window resized", "width", width, "height", height)
|
||||
})
|
||||
```
|
||||
|
||||
## Common Patterns
|
||||
|
||||
These patterns demonstrate proven approaches for using events in real-world applications. Each pattern solves a specific communication challenge between your Go backend and frontend, helping you build responsive, well-structured applications.
|
||||
|
||||
### Request/Response Pattern
|
||||
|
||||
Use this when you want to notify the frontend about the completion of backend operations, such as after data fetching, file processing, or background tasks. The service binding returns data directly, while events provide additional notifications for UI updates like showing toast messages or refreshing lists.
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
// Service method
|
||||
type DataService struct {
|
||||
app *application.Application
|
||||
}
|
||||
|
||||
func (s *DataService) FetchData(query string) ([]Item, error) {
|
||||
items := fetchFromDatabase(query)
|
||||
|
||||
// Emit event when done
|
||||
s.app.EmitEvent("data-fetched", map[string]interface{}{
|
||||
"query": query,
|
||||
"count": len(items),
|
||||
})
|
||||
|
||||
return items, nil
|
||||
}
|
||||
```
|
||||
|
||||
**JavaScript:**
|
||||
|
||||
```javascript
|
||||
import { FetchData } from './bindings/DataService'
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
// Listen for completion event
|
||||
On('data-fetched', (data) => {
|
||||
console.log(`Fetched ${data.count} items for query: ${data.query}`)
|
||||
showNotification(`Found ${data.count} results`)
|
||||
})
|
||||
|
||||
// Call service method
|
||||
const items = await FetchData("search term")
|
||||
displayItems(items)
|
||||
```
|
||||
|
||||
### Progress Updates
|
||||
|
||||
Ideal for long-running operations like file uploads, batch processing, large data imports, or video encoding. Emit progress events during the operation to update progress bars, status text, or step indicators in the UI, providing users with real-time feedback.
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
func (s *Service) ProcessFiles(files []string) error {
|
||||
total := len(files)
|
||||
|
||||
for i, file := range files {
|
||||
// Process file
|
||||
processFile(file)
|
||||
|
||||
// Emit progress event
|
||||
s.app.EmitEvent("progress", map[string]interface{}{
|
||||
"current": i + 1,
|
||||
"total": total,
|
||||
"percent": float64(i+1) / float64(total) * 100,
|
||||
"file": file,
|
||||
})
|
||||
}
|
||||
|
||||
s.app.EmitEvent("processing-complete")
|
||||
return nil
|
||||
}
|
||||
```
|
||||
|
||||
**JavaScript:**
|
||||
|
||||
```javascript
|
||||
import { On, Once } from '@wailsio/runtime'
|
||||
|
||||
// Update progress bar
|
||||
On('progress', (data) => {
|
||||
progressBar.style.width = `${data.percent}%`
|
||||
statusText.textContent = `Processing ${data.file}... (${data.current}/${data.total})`
|
||||
})
|
||||
|
||||
// Handle completion
|
||||
Once('processing-complete', () => {
|
||||
progressBar.style.width = '100%'
|
||||
statusText.textContent = 'Complete!'
|
||||
setTimeout(() => hideProgressBar(), 2000)
|
||||
})
|
||||
```
|
||||
|
||||
### Multi-Window Communication
|
||||
|
||||
Perfect for applications with multiple windows like settings panels, dashboards, or document viewers. Broadcast events to synchronize state across all windows (theme changes, user preferences) or send targeted events to specific windows for window-specific updates.
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
// Broadcast to all windows
|
||||
app.EmitEvent("theme-changed", "dark")
|
||||
|
||||
// Send to specific window
|
||||
preferencesWindow.EmitEvent("settings-updated", settings)
|
||||
|
||||
// Window-specific listener
|
||||
window1.OnEvent("request-data", func(e *application.CustomEvent) {
|
||||
// Only this window will receive this event
|
||||
window1.EmitEvent("data-response", data)
|
||||
})
|
||||
```
|
||||
|
||||
**JavaScript:**
|
||||
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
// Listen in any window
|
||||
On('theme-changed', (theme) => {
|
||||
document.body.className = theme
|
||||
})
|
||||
```
|
||||
|
||||
### State Synchronization
|
||||
|
||||
Use when you need to keep frontend and backend state in sync, such as user sessions, application configuration, or collaborative features. When state changes on the backend, emit events to update all connected frontends, ensuring consistency across your application.
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
type StateService struct {
|
||||
app *application.Application
|
||||
state map[string]interface{}
|
||||
mu sync.RWMutex
|
||||
}
|
||||
|
||||
func (s *StateService) UpdateState(key string, value interface{}) {
|
||||
s.mu.Lock()
|
||||
s.state[key] = value
|
||||
s.mu.Unlock()
|
||||
|
||||
// Notify all windows
|
||||
s.app.EmitEvent("state-updated", map[string]interface{}{
|
||||
"key": key,
|
||||
"value": value,
|
||||
})
|
||||
}
|
||||
|
||||
func (s *StateService) GetState(key string) interface{} {
|
||||
s.mu.RLock()
|
||||
defer s.mu.RUnlock()
|
||||
return s.state[key]
|
||||
}
|
||||
```
|
||||
|
||||
**JavaScript:**
|
||||
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
import { GetState } from './bindings/StateService'
|
||||
|
||||
// Keep local state in sync
|
||||
let localState = {}
|
||||
|
||||
On('state-updated', async (data) => {
|
||||
localState[data.key] = data.value
|
||||
updateUI(data.key, data.value)
|
||||
})
|
||||
|
||||
// Initialize state
|
||||
const initialState = await GetState("all")
|
||||
localState = initialState
|
||||
```
|
||||
|
||||
### Event-Driven Notifications
|
||||
|
||||
Best for displaying user feedback like success confirmations, error alerts, or info messages. Instead of calling UI code directly from services, emit notification events that the frontend handles consistently, making it easy to change notification styles or add features like notification history.
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
type NotificationService struct {
|
||||
app *application.Application
|
||||
}
|
||||
|
||||
func (s *NotificationService) Success(message string) {
|
||||
s.app.EmitEvent("notification", map[string]interface{}{
|
||||
"type": "success",
|
||||
"message": message,
|
||||
})
|
||||
}
|
||||
|
||||
func (s *NotificationService) Error(message string) {
|
||||
s.app.EmitEvent("notification", map[string]interface{}{
|
||||
"type": "error",
|
||||
"message": message,
|
||||
})
|
||||
}
|
||||
|
||||
func (s *NotificationService) Info(message string) {
|
||||
s.app.EmitEvent("notification", map[string]interface{}{
|
||||
"type": "info",
|
||||
"message": message,
|
||||
})
|
||||
}
|
||||
```
|
||||
|
||||
**JavaScript:**
|
||||
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
// Unified notification handler
|
||||
On('notification', (data) => {
|
||||
const toast = document.createElement('div')
|
||||
toast.className = `toast toast-${data.type}`
|
||||
toast.textContent = data.message
|
||||
|
||||
document.body.appendChild(toast)
|
||||
|
||||
setTimeout(() => {
|
||||
toast.classList.add('fade-out')
|
||||
setTimeout(() => toast.remove(), 300)
|
||||
}, 3000)
|
||||
})
|
||||
```
|
||||
|
||||
## Complete Example
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"sync"
|
||||
"time"
|
||||
"github.com/wailsapp/wails/v3/pkg/application"
|
||||
)
|
||||
|
||||
type EventDemoService struct {
|
||||
app *application.Application
|
||||
mu sync.Mutex
|
||||
}
|
||||
|
||||
func NewEventDemoService(app *application.Application) *EventDemoService {
|
||||
service := &EventDemoService{app: app}
|
||||
|
||||
// Listen for custom events
|
||||
app.OnEvent("user-action", func(e *application.CustomEvent) {
|
||||
data := e.Data.(map[string]interface{})
|
||||
app.Logger.Info("User action received", "data", data)
|
||||
})
|
||||
|
||||
return service
|
||||
}
|
||||
|
||||
func (s *EventDemoService) StartLongTask() {
|
||||
go func() {
|
||||
s.app.EmitEvent("task-started")
|
||||
|
||||
for i := 1; i <= 10; i++ {
|
||||
time.Sleep(500 * time.Millisecond)
|
||||
|
||||
s.app.EmitEvent("task-progress", map[string]interface{}{
|
||||
"step": i,
|
||||
"total": 10,
|
||||
"percent": i * 10,
|
||||
})
|
||||
}
|
||||
|
||||
s.app.EmitEvent("task-completed", map[string]interface{}{
|
||||
"message": "Task finished successfully!",
|
||||
})
|
||||
}()
|
||||
}
|
||||
|
||||
func (s *EventDemoService) BroadcastMessage(message string) {
|
||||
s.app.EmitEvent("broadcast", message)
|
||||
}
|
||||
|
||||
func main() {
|
||||
app := application.New(application.Options{
|
||||
Name: "Event Demo",
|
||||
})
|
||||
|
||||
// Handle application lifecycle
|
||||
app.OnApplicationEvent(application.EventApplicationStarted, func(e *application.ApplicationEvent) {
|
||||
app.Logger.Info("Application started!")
|
||||
})
|
||||
|
||||
app.OnApplicationEvent(application.EventApplicationShutdown, func(e *application.ApplicationEvent) {
|
||||
app.Logger.Info("Application shutting down...")
|
||||
})
|
||||
|
||||
// Register service
|
||||
service := NewEventDemoService(app)
|
||||
app.RegisterService(application.NewService(service))
|
||||
|
||||
// Create window
|
||||
window := app.NewWebviewWindow()
|
||||
|
||||
// Handle window events
|
||||
window.OnWindowEvent(events.Common.WindowFocus, func(e *application.WindowEvent) {
|
||||
window.EmitEvent("window-state", "focused")
|
||||
})
|
||||
|
||||
window.OnWindowEvent(events.Common.WindowLostFocus, func(e *application.WindowEvent) {
|
||||
window.EmitEvent("window-state", "blurred")
|
||||
})
|
||||
|
||||
window.Show()
|
||||
app.Run()
|
||||
}
|
||||
```
|
||||
|
||||
**JavaScript:**
|
||||
|
||||
```javascript
|
||||
import { On, Once } from '@wailsio/runtime'
|
||||
import { StartLongTask, BroadcastMessage } from './bindings/EventDemoService'
|
||||
|
||||
// Task events
|
||||
On('task-started', () => {
|
||||
console.log('Task started...')
|
||||
document.getElementById('status').textContent = 'Running...'
|
||||
})
|
||||
|
||||
On('task-progress', (data) => {
|
||||
const progressBar = document.getElementById('progress')
|
||||
progressBar.style.width = `${data.percent}%`
|
||||
console.log(`Step ${data.step} of ${data.total}`)
|
||||
})
|
||||
|
||||
Once('task-completed', (data) => {
|
||||
console.log('Task completed!', data.message)
|
||||
document.getElementById('status').textContent = data.message
|
||||
})
|
||||
|
||||
// Broadcast events
|
||||
On('broadcast', (message) => {
|
||||
console.log('Broadcast:', message)
|
||||
alert(message)
|
||||
})
|
||||
|
||||
// Window state events
|
||||
On('window-state', (state) => {
|
||||
console.log('Window is now:', state)
|
||||
document.body.dataset.windowState = state
|
||||
})
|
||||
|
||||
// Trigger long task
|
||||
document.getElementById('startTask').addEventListener('click', async () => {
|
||||
await StartLongTask()
|
||||
})
|
||||
|
||||
// Send broadcast
|
||||
document.getElementById('broadcast').addEventListener('click', async () => {
|
||||
const message = document.getElementById('message').value
|
||||
await BroadcastMessage(message)
|
||||
})
|
||||
```
|
||||
|
||||
## Built-in Events
|
||||
|
||||
Wails provides built-in system events for application and window lifecycle. These events are emitted automatically by the framework.
|
||||
|
||||
### Common Events vs Platform-Native Events
|
||||
|
||||
Wails provides two types of system events:
|
||||
|
||||
**Common Events** (`events.Common.*`) are cross-platform abstractions that work consistently across macOS, Windows, and Linux. These are the events you should use in your application for maximum portability.
|
||||
|
||||
**Platform-Native Events** (`events.Mac.*`, `events.Windows.*`, `events.Linux.*`) are the underlying OS-specific events that Common Events are mapped from. These provide access to platform-specific behaviors and edge cases.
|
||||
|
||||
**How They Work:**
|
||||
|
||||
```go
|
||||
import "github.com/wailsapp/wails/v3/pkg/events"
|
||||
|
||||
// ✅ RECOMMENDED: Use Common Events for cross-platform code
|
||||
window.OnWindowEvent(events.Common.WindowClosing, func(e *application.WindowEvent) {
|
||||
// This works on all platforms
|
||||
})
|
||||
|
||||
// Platform-specific events for advanced use cases
|
||||
window.OnWindowEvent(events.Mac.WindowWillClose, func(e *application.WindowEvent) {
|
||||
// macOS-specific "will close" event (before WindowClosing)
|
||||
})
|
||||
|
||||
window.OnWindowEvent(events.Windows.WindowClosing, func(e *application.WindowEvent) {
|
||||
// Windows-specific close event
|
||||
})
|
||||
```
|
||||
|
||||
**Event Mapping:**
|
||||
|
||||
Platform-native events are automatically mapped to Common Events:
|
||||
|
||||
- macOS: `events.Mac.WindowShouldClose` → `events.Common.WindowClosing`
|
||||
- Windows: `events.Windows.WindowClosing` → `events.Common.WindowClosing`
|
||||
- Linux: `events.Linux.WindowDeleteEvent` → `events.Common.WindowClosing`
|
||||
|
||||
This mapping happens automatically in the background, so when you listen for `events.Common.WindowClosing`, you'll receive it regardless of the platform.
|
||||
|
||||
**When to Use Each:**
|
||||
|
||||
- **Use Common Events** for 99% of your application code - they provide consistent behavior across platforms
|
||||
- **Use Platform-Native Events** only when you need platform-specific functionality that isn't available in Common Events (e.g., macOS-specific window lifecycle events, Windows power management events)
|
||||
|
||||
### Application Events
|
||||
|
||||
| Event | Description | When Emitted | Cancellable |
|
||||
|-------|-------------|--------------|-------------|
|
||||
| `ApplicationOpenedWithFile` | Application opened with a file | When app is launched with a file (e.g., from file association) | No |
|
||||
| `ApplicationStarted` | Application has finished launching | After app initialization is complete and app is ready | No |
|
||||
| `ApplicationLaunchedWithUrl` | Application launched with a URL | When app is launched via URL scheme | No |
|
||||
| `ThemeChanged` | System theme changed | When OS theme switches between light/dark mode | No |
|
||||
|
||||
**Usage:**
|
||||
|
||||
```go
|
||||
import "github.com/wailsapp/wails/v3/pkg/events"
|
||||
|
||||
app.OnApplicationEvent(events.Common.ApplicationStarted, func(e *application.ApplicationEvent) {
|
||||
app.Logger.Info("Application ready!")
|
||||
})
|
||||
|
||||
app.OnApplicationEvent(events.Common.ThemeChanged, func(e *application.ApplicationEvent) {
|
||||
// Update app theme
|
||||
})
|
||||
```
|
||||
|
||||
### Window Events
|
||||
|
||||
| Event | Description | When Emitted | Cancellable |
|
||||
|-------|-------------|--------------|-------------|
|
||||
| `WindowClosing` | Window is about to close | Before window closes (user clicked X, Close() called) | Yes |
|
||||
| `WindowDidMove` | Window moved to new position | After window position changes (debounced) | No |
|
||||
| `WindowDidResize` | Window was resized | After window size changes | No |
|
||||
| `WindowDPIChanged` | Window DPI scaling changed | When moving between monitors with different DPI (Windows) | No |
|
||||
| `WindowFilesDropped` | Files dropped via native OS drag-drop | After files are dropped from OS onto window | No |
|
||||
| `WindowFocus` | Window gained focus | When window becomes active | No |
|
||||
| `WindowFullscreen` | Window entered fullscreen | After Fullscreen() or user enters fullscreen | No |
|
||||
| `WindowHide` | Window was hidden | After Hide() or window becomes occluded | No |
|
||||
| `WindowLostFocus` | Window lost focus | When window becomes inactive | No |
|
||||
| `WindowMaximise` | Window was maximized | After Maximise() or user maximizes | Yes (macOS) |
|
||||
| `WindowMinimise` | Window was minimized | After Minimise() or user minimizes | Yes (macOS) |
|
||||
| `WindowRestore` | Window restored from min/max state | After Restore() (Windows primarily) | No |
|
||||
| `WindowRuntimeReady` | Wails runtime loaded and ready | When JavaScript runtime initialization completes | No |
|
||||
| `WindowShow` | Window became visible | After Show() or window becomes visible | No |
|
||||
| `WindowUnFullscreen` | Window exited fullscreen | After UnFullscreen() or user exits fullscreen | No |
|
||||
| `WindowUnMaximise` | Window exited maximized state | After UnMaximise() or user unmaximizes | Yes (macOS) |
|
||||
| `WindowUnMinimise` | Window exited minimized state | After UnMinimise()/Restore() or user restores | Yes (macOS) |
|
||||
| `WindowZoomIn` | Window content zoom increased | After ZoomIn() called (macOS primarily) | Yes (macOS) |
|
||||
| `WindowZoomOut` | Window content zoom decreased | After ZoomOut() called (macOS primarily) | Yes (macOS) |
|
||||
| `WindowZoomReset` | Window content zoom reset to 100% | After ZoomReset() called (macOS primarily) | Yes (macOS) |
|
||||
| `WindowDropZoneFilesDropped` | Files dropped on JS-defined drop zone | When files dropped onto element with drop zone | No |
|
||||
|
||||
**Usage:**
|
||||
|
||||
```go
|
||||
import "github.com/wailsapp/wails/v3/pkg/events"
|
||||
|
||||
// Listen for window events
|
||||
window.OnWindowEvent(events.Common.WindowFocus, func(e *application.WindowEvent) {
|
||||
app.Logger.Info("Window focused")
|
||||
})
|
||||
|
||||
// Cancel window close
|
||||
window.RegisterHook(events.Common.WindowClosing, func(e *application.WindowEvent) {
|
||||
result, _ := app.QuestionDialog().
|
||||
SetMessage("Close window?").
|
||||
SetButtons("Yes", "No").
|
||||
Show()
|
||||
|
||||
if result == "No" {
|
||||
e.Cancel() // Prevent close
|
||||
}
|
||||
})
|
||||
|
||||
// Wait for runtime ready
|
||||
window.OnWindowEvent(events.Common.WindowRuntimeReady, func(e *application.WindowEvent) {
|
||||
app.Logger.Info("Runtime ready, safe to emit events to frontend")
|
||||
window.EmitEvent("app-initialized", data)
|
||||
})
|
||||
```
|
||||
|
||||
**Important Notes:**
|
||||
|
||||
- **WindowRuntimeReady** is critical - wait for this event before emitting events to the frontend
|
||||
- **WindowDidMove** and **WindowDidResize** are debounced (50ms default) to prevent event flooding
|
||||
- **Cancellable events** can be prevented by calling `event.Cancel()` in a `RegisterHook()` handler
|
||||
- **WindowFilesDropped** is for native OS file drops; **WindowDropZoneFilesDropped** is for web-based drop zones
|
||||
- Some events are platform-specific (e.g., WindowDPIChanged on Windows, zoom events primarily on macOS)
|
||||
|
||||
## Event Naming Conventions
|
||||
|
||||
```go
|
||||
// Good - descriptive and specific
|
||||
app.EmitEvent("user:logged-in", user)
|
||||
app.EmitEvent("data:fetch:complete", results)
|
||||
app.EmitEvent("ui:theme:changed", theme)
|
||||
|
||||
// Bad - vague and unclear
|
||||
app.EmitEvent("event1", data)
|
||||
app.EmitEvent("update", stuff)
|
||||
app.EmitEvent("e", value)
|
||||
```
|
||||
|
||||
## Performance Considerations
|
||||
|
||||
### Debouncing High-Frequency Events
|
||||
|
||||
```go
|
||||
type Service struct {
|
||||
app *application.Application
|
||||
lastEmit time.Time
|
||||
debounceWindow time.Duration
|
||||
}
|
||||
|
||||
func (s *Service) EmitWithDebounce(event string, data interface{}) {
|
||||
now := time.Now()
|
||||
if now.Sub(s.lastEmit) < s.debounceWindow {
|
||||
return // Skip this emission
|
||||
}
|
||||
|
||||
s.app.EmitEvent(event, data)
|
||||
s.lastEmit = now
|
||||
}
|
||||
```
|
||||
|
||||
### Throttling Events
|
||||
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
let lastUpdate = 0
|
||||
const throttleMs = 100
|
||||
|
||||
On('high-frequency-event', (data) => {
|
||||
const now = Date.now()
|
||||
if (now - lastUpdate < throttleMs) {
|
||||
return // Skip this update
|
||||
}
|
||||
|
||||
processUpdate(data)
|
||||
lastUpdate = now
|
||||
})
|
||||
```
|
||||
809
docs/src/content/docs/reference/frontend-runtime.mdx
Normal file
809
docs/src/content/docs/reference/frontend-runtime.mdx
Normal file
|
|
@ -0,0 +1,809 @@
|
|||
---
|
||||
title: Frontend Runtime
|
||||
description: The Wails JavaScript runtime package for frontend integration
|
||||
sidebar:
|
||||
order: 1
|
||||
---
|
||||
|
||||
The Wails frontend runtime is the standard library for Wails applications. It provides a
|
||||
number of features that may be used in your applications, including:
|
||||
|
||||
- Window management
|
||||
- Dialogs
|
||||
- Browser integration
|
||||
- Clipboard
|
||||
- Menus
|
||||
- System information
|
||||
- Events
|
||||
- Context Menus
|
||||
- Screens
|
||||
- WML (Wails Markup Language)
|
||||
|
||||
The runtime is required for integration between Go and the frontend. There are 2
|
||||
ways to integrate the runtime:
|
||||
|
||||
- Using the `@wailsio/runtime` package
|
||||
- Using a pre-built bundle
|
||||
|
||||
## Using the npm package
|
||||
|
||||
The `@wailsio/runtime` package is a JavaScript package that provides access to
|
||||
the Wails runtime from the frontend. It is used by all standard templates
|
||||
and is the recommended way to integrate the runtime into your application.
|
||||
By using the `@wailsio/runtime` package, you will only include the parts of the runtime that you use.
|
||||
|
||||
The package is available on npm and can be installed using:
|
||||
|
||||
```shell
|
||||
npm install --save @wailsio/runtime
|
||||
```
|
||||
|
||||
## Using a pre-built bundle
|
||||
|
||||
Some projects will not use a Javascript bundler and may prefer to use a
|
||||
pre-built bundled version of the runtime. This version can be generated locally
|
||||
using the following command:
|
||||
|
||||
```shell
|
||||
wails3 generate runtime
|
||||
```
|
||||
|
||||
The command will output a `runtime.js` (and `runtime.debug.js`) file in the current
|
||||
directory. This file is an ES module that can be imported by your application scripts
|
||||
just like the npm package, but the API is also exported to the global window object,
|
||||
so for simpler applications you can use it as follows:
|
||||
|
||||
```html
|
||||
<html>
|
||||
<head>
|
||||
<script type="module" src="./runtime.js"></script>
|
||||
<script>
|
||||
window.onload = function () {
|
||||
wails.Window.SetTitle("A new window title");
|
||||
}
|
||||
</script>
|
||||
</head>
|
||||
<!--- ... -->
|
||||
</html>
|
||||
```
|
||||
|
||||
:::caution
|
||||
It is important to include the `type="module"` attribute on the `<script>` tag that loads the runtime
|
||||
and to wait for the page to be fully loaded before calling the API,
|
||||
because scripts with the `type="module"` attribute run asynchronously.
|
||||
:::
|
||||
|
||||
## Initialisation
|
||||
|
||||
Apart from the API functions, the runtime provides support for context menus and window dragging.
|
||||
These features will only work as expected after the runtime has been initialised.
|
||||
Even if you don't use the API, make sure to include a side-effect import statement
|
||||
somewhere in your frontend code:
|
||||
|
||||
```javascript
|
||||
import "@wailsio/runtime";
|
||||
```
|
||||
|
||||
Your bundler should detect the presence of side-effects and include
|
||||
all required initialisation code in the build.
|
||||
|
||||
:::note
|
||||
If you prefer the pre-built bundle, adding a script tag as shown above suffices.
|
||||
:::
|
||||
|
||||
## API Reference
|
||||
|
||||
The runtime is organized into modules, each providing specific functionality. Import only what you need:
|
||||
|
||||
```javascript
|
||||
import { On, Emit } from '@wailsio/runtime/events'
|
||||
import Window from '@wailsio/runtime/window'
|
||||
import { SetText, Text } from '@wailsio/runtime/clipboard'
|
||||
```
|
||||
|
||||
### Events
|
||||
|
||||
Event system for communication between Go and JavaScript.
|
||||
|
||||
#### On()
|
||||
|
||||
Register a callback for an event.
|
||||
|
||||
```typescript
|
||||
function On(eventName: string, callback: (event: WailsEvent) => void): () => void
|
||||
```
|
||||
|
||||
**Returns:** Unsubscribe function
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime/events'
|
||||
|
||||
const unsubscribe = On('user-logged-in', (event) => {
|
||||
console.log('User:', event.data.username)
|
||||
})
|
||||
|
||||
// Later: unsubscribe()
|
||||
```
|
||||
|
||||
#### Once()
|
||||
|
||||
Register a callback that runs only once.
|
||||
|
||||
```typescript
|
||||
function Once(eventName: string, callback: (event: WailsEvent) => void): () => void
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Once } from '@wailsio/runtime/events'
|
||||
|
||||
Once('app-ready', () => {
|
||||
console.log('App initialized')
|
||||
})
|
||||
```
|
||||
|
||||
#### Emit()
|
||||
|
||||
Emit an event to Go backend.
|
||||
|
||||
```typescript
|
||||
function Emit(name: string, data?: any): Promise<void>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Emit } from '@wailsio/runtime/events'
|
||||
|
||||
await Emit('button-clicked', { buttonId: 'submit' })
|
||||
```
|
||||
|
||||
#### Off()
|
||||
|
||||
Remove event listeners.
|
||||
|
||||
```typescript
|
||||
function Off(...eventNames: string[]): void
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Off } from '@wailsio/runtime/events'
|
||||
|
||||
Off('user-logged-in', 'user-logged-out')
|
||||
```
|
||||
|
||||
#### OffAll()
|
||||
|
||||
Remove all event listeners.
|
||||
|
||||
```typescript
|
||||
function OffAll(): void
|
||||
```
|
||||
|
||||
### Window
|
||||
|
||||
Window management methods. The default export is the current window.
|
||||
|
||||
```javascript
|
||||
import Window from '@wailsio/runtime/window'
|
||||
|
||||
// Current window
|
||||
await Window.SetTitle('New Title')
|
||||
await Window.Center()
|
||||
|
||||
// Get another window
|
||||
const otherWindow = Window.Get('secondary')
|
||||
await otherWindow.Show()
|
||||
```
|
||||
|
||||
#### Visibility
|
||||
|
||||
**Show()** - Shows the window
|
||||
|
||||
```typescript
|
||||
function Show(): Promise<void>
|
||||
```
|
||||
|
||||
**Hide()** - Hides the window
|
||||
|
||||
```typescript
|
||||
function Hide(): Promise<void>
|
||||
```
|
||||
|
||||
**Close()** - Closes the window
|
||||
|
||||
```typescript
|
||||
function Close(): Promise<void>
|
||||
```
|
||||
|
||||
#### Size and Position
|
||||
|
||||
**SetSize(width, height)** - Sets window size
|
||||
|
||||
```typescript
|
||||
function SetSize(width: number, height: number): Promise<void>
|
||||
```
|
||||
|
||||
**Size()** - Gets window size
|
||||
|
||||
```typescript
|
||||
function Size(): Promise<{ width: number, height: number }>
|
||||
```
|
||||
|
||||
**SetPosition(x, y)** - Sets absolute position
|
||||
|
||||
```typescript
|
||||
function SetPosition(x: number, y: number): Promise<void>
|
||||
```
|
||||
|
||||
**Position()** - Gets absolute position
|
||||
|
||||
```typescript
|
||||
function Position(): Promise<{ x: number, y: number }>
|
||||
```
|
||||
|
||||
**Center()** - Centers the window
|
||||
|
||||
```typescript
|
||||
function Center(): Promise<void>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import Window from '@wailsio/runtime/window'
|
||||
|
||||
// Resize and center
|
||||
await Window.SetSize(800, 600)
|
||||
await Window.Center()
|
||||
|
||||
// Get current size
|
||||
const { width, height } = await Window.Size()
|
||||
```
|
||||
|
||||
#### Window State
|
||||
|
||||
**Minimise()** - Minimizes the window
|
||||
|
||||
```typescript
|
||||
function Minimise(): Promise<void>
|
||||
```
|
||||
|
||||
**Maximise()** - Maximizes the window
|
||||
|
||||
```typescript
|
||||
function Maximise(): Promise<void>
|
||||
```
|
||||
|
||||
**Fullscreen()** - Enters fullscreen
|
||||
|
||||
```typescript
|
||||
function Fullscreen(): Promise<void>
|
||||
```
|
||||
|
||||
**Restore()** - Restores from minimized/maximized/fullscreen
|
||||
|
||||
```typescript
|
||||
function Restore(): Promise<void>
|
||||
```
|
||||
|
||||
**IsMinimised()** - Checks if minimized
|
||||
|
||||
```typescript
|
||||
function IsMinimised(): Promise<boolean>
|
||||
```
|
||||
|
||||
**IsMaximised()** - Checks if maximized
|
||||
|
||||
```typescript
|
||||
function IsMaximised(): Promise<boolean>
|
||||
```
|
||||
|
||||
**IsFullscreen()** - Checks if fullscreen
|
||||
|
||||
```typescript
|
||||
function IsFullscreen(): Promise<boolean>
|
||||
```
|
||||
|
||||
#### Window Properties
|
||||
|
||||
**SetTitle(title)** - Sets window title
|
||||
|
||||
```typescript
|
||||
function SetTitle(title: string): Promise<void>
|
||||
```
|
||||
|
||||
**Name()** - Gets window name
|
||||
|
||||
```typescript
|
||||
function Name(): Promise<string>
|
||||
```
|
||||
|
||||
**SetBackgroundColour(r, g, b, a)** - Sets background color
|
||||
|
||||
```typescript
|
||||
function SetBackgroundColour(r: number, g: number, b: number, a: number): Promise<void>
|
||||
```
|
||||
|
||||
**SetAlwaysOnTop(alwaysOnTop)** - Keeps window on top
|
||||
|
||||
```typescript
|
||||
function SetAlwaysOnTop(alwaysOnTop: boolean): Promise<void>
|
||||
```
|
||||
|
||||
**SetResizable(resizable)** - Makes window resizable
|
||||
|
||||
```typescript
|
||||
function SetResizable(resizable: boolean): Promise<void>
|
||||
```
|
||||
|
||||
#### Focus and Screen
|
||||
|
||||
**Focus()** - Focuses the window
|
||||
|
||||
```typescript
|
||||
function Focus(): Promise<void>
|
||||
```
|
||||
|
||||
**IsFocused()** - Checks if focused
|
||||
|
||||
```typescript
|
||||
function IsFocused(): Promise<boolean>
|
||||
```
|
||||
|
||||
**GetScreen()** - Gets the screen the window is on
|
||||
|
||||
```typescript
|
||||
function GetScreen(): Promise<Screen>
|
||||
```
|
||||
|
||||
#### Content
|
||||
|
||||
**Reload()** - Reloads the page
|
||||
|
||||
```typescript
|
||||
function Reload(): Promise<void>
|
||||
```
|
||||
|
||||
**ForceReload()** - Forces page reload (clears cache)
|
||||
|
||||
```typescript
|
||||
function ForceReload(): Promise<void>
|
||||
```
|
||||
|
||||
#### Zoom
|
||||
|
||||
**SetZoom(level)** - Sets zoom level
|
||||
|
||||
```typescript
|
||||
function SetZoom(level: number): Promise<void>
|
||||
```
|
||||
|
||||
**GetZoom()** - Gets zoom level
|
||||
|
||||
```typescript
|
||||
function GetZoom(): Promise<number>
|
||||
```
|
||||
|
||||
**ZoomIn()** - Increases zoom
|
||||
|
||||
```typescript
|
||||
function ZoomIn(): Promise<void>
|
||||
```
|
||||
|
||||
**ZoomOut()** - Decreases zoom
|
||||
|
||||
```typescript
|
||||
function ZoomOut(): Promise<void>
|
||||
```
|
||||
|
||||
**ZoomReset()** - Resets zoom to 100%
|
||||
|
||||
```typescript
|
||||
function ZoomReset(): Promise<void>
|
||||
```
|
||||
|
||||
### Clipboard
|
||||
|
||||
Clipboard operations.
|
||||
|
||||
#### SetText()
|
||||
|
||||
Set clipboard text.
|
||||
|
||||
```typescript
|
||||
function SetText(text: string): Promise<void>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { SetText } from '@wailsio/runtime/clipboard'
|
||||
|
||||
await SetText('Hello from Wails!')
|
||||
```
|
||||
|
||||
#### Text()
|
||||
|
||||
Get clipboard text.
|
||||
|
||||
```typescript
|
||||
function Text(): Promise<string>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Text } from '@wailsio/runtime/clipboard'
|
||||
|
||||
const clipboardText = await Text()
|
||||
console.log('Clipboard:', clipboardText)
|
||||
```
|
||||
|
||||
### Application
|
||||
|
||||
Application-level methods.
|
||||
|
||||
#### Show()
|
||||
|
||||
Shows all application windows.
|
||||
|
||||
```typescript
|
||||
function Show(): Promise<void>
|
||||
```
|
||||
|
||||
#### Hide()
|
||||
|
||||
Hides all application windows.
|
||||
|
||||
```typescript
|
||||
function Hide(): Promise<void>
|
||||
```
|
||||
|
||||
#### Quit()
|
||||
|
||||
Quits the application.
|
||||
|
||||
```typescript
|
||||
function Quit(): Promise<void>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Quit } from '@wailsio/runtime/application'
|
||||
|
||||
// Add quit button
|
||||
document.getElementById('quit-btn').addEventListener('click', async () => {
|
||||
await Quit()
|
||||
})
|
||||
```
|
||||
|
||||
### Browser
|
||||
|
||||
Open URLs in the default browser.
|
||||
|
||||
#### OpenURL()
|
||||
|
||||
Opens a URL in the system browser.
|
||||
|
||||
```typescript
|
||||
function OpenURL(url: string | URL): Promise<void>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { OpenURL } from '@wailsio/runtime/browser'
|
||||
|
||||
await OpenURL('https://wails.io')
|
||||
```
|
||||
|
||||
### Screens
|
||||
|
||||
Screen information and management.
|
||||
|
||||
#### GetAll()
|
||||
|
||||
Gets all screens.
|
||||
|
||||
```typescript
|
||||
function GetAll(): Promise<Screen[]>
|
||||
```
|
||||
|
||||
#### GetPrimary()
|
||||
|
||||
Gets the primary screen.
|
||||
|
||||
```typescript
|
||||
function GetPrimary(): Promise<Screen>
|
||||
```
|
||||
|
||||
#### GetCurrent()
|
||||
|
||||
Gets the current active screen.
|
||||
|
||||
```typescript
|
||||
function GetCurrent(): Promise<Screen>
|
||||
```
|
||||
|
||||
**Screen Interface:**
|
||||
|
||||
```typescript
|
||||
interface Screen {
|
||||
ID: string
|
||||
Name: string
|
||||
ScaleFactor: number
|
||||
X: number
|
||||
Y: number
|
||||
Size: { Width: number, Height: number }
|
||||
Bounds: { X: number, Y: number, Width: number, Height: number }
|
||||
WorkArea: { X: number, Y: number, Width: number, Height: number }
|
||||
IsPrimary: boolean
|
||||
Rotation: number
|
||||
}
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { GetAll, GetPrimary } from '@wailsio/runtime/screens'
|
||||
|
||||
// List all screens
|
||||
const screens = await GetAll()
|
||||
screens.forEach(screen => {
|
||||
console.log(`${screen.Name}: ${screen.Size.Width}x${screen.Size.Height}`)
|
||||
})
|
||||
|
||||
// Get primary screen
|
||||
const primary = await GetPrimary()
|
||||
console.log('Primary screen:', primary.Name)
|
||||
```
|
||||
|
||||
### Dialogs
|
||||
|
||||
Native OS dialogs from JavaScript.
|
||||
|
||||
#### Info()
|
||||
|
||||
Shows an information dialog.
|
||||
|
||||
```typescript
|
||||
function Info(options: MessageDialogOptions): Promise<string>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Info } from '@wailsio/runtime/dialogs'
|
||||
|
||||
await Info({
|
||||
Title: 'Success',
|
||||
Message: 'Operation completed successfully!'
|
||||
})
|
||||
```
|
||||
|
||||
#### Error()
|
||||
|
||||
Shows an error dialog.
|
||||
|
||||
```typescript
|
||||
function Error(options: MessageDialogOptions): Promise<string>
|
||||
```
|
||||
|
||||
#### Warning()
|
||||
|
||||
Shows a warning dialog.
|
||||
|
||||
```typescript
|
||||
function Warning(options: MessageDialogOptions): Promise<string>
|
||||
```
|
||||
|
||||
#### Question()
|
||||
|
||||
Shows a question dialog with custom buttons.
|
||||
|
||||
```typescript
|
||||
function Question(options: QuestionDialogOptions): Promise<string>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { Question } from '@wailsio/runtime/dialogs'
|
||||
|
||||
const result = await Question({
|
||||
Title: 'Confirm Delete',
|
||||
Message: 'Are you sure you want to delete this file?',
|
||||
Buttons: [
|
||||
{ Label: 'Delete', IsDefault: false },
|
||||
{ Label: 'Cancel', IsDefault: true }
|
||||
]
|
||||
})
|
||||
|
||||
if (result === 'Delete') {
|
||||
// Delete the file
|
||||
}
|
||||
```
|
||||
|
||||
#### OpenFile()
|
||||
|
||||
Shows a file open dialog.
|
||||
|
||||
```typescript
|
||||
function OpenFile(options: OpenFileDialogOptions): Promise<string | string[]>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```javascript
|
||||
import { OpenFile } from '@wailsio/runtime/dialogs'
|
||||
|
||||
const file = await OpenFile({
|
||||
Title: 'Select Image',
|
||||
Filters: [
|
||||
{ DisplayName: 'Images', Pattern: '*.png;*.jpg;*.jpeg' },
|
||||
{ DisplayName: 'All Files', Pattern: '*.*' }
|
||||
]
|
||||
})
|
||||
|
||||
if (file) {
|
||||
console.log('Selected:', file)
|
||||
}
|
||||
```
|
||||
|
||||
#### SaveFile()
|
||||
|
||||
Shows a file save dialog.
|
||||
|
||||
```typescript
|
||||
function SaveFile(options: SaveFileDialogOptions): Promise<string>
|
||||
```
|
||||
|
||||
### WML (Wails Markup Language)
|
||||
|
||||
WML provides declarative attributes for common actions. Add attributes to HTML elements:
|
||||
|
||||
#### Attributes
|
||||
|
||||
**wml-event** - Emits an event when clicked
|
||||
|
||||
```html
|
||||
<button wml-event="save-clicked">Save</button>
|
||||
```
|
||||
|
||||
**wml-window** - Calls a window method
|
||||
|
||||
```html
|
||||
<button wml-window="Close">Close Window</button>
|
||||
<button wml-window="Minimise">Minimize</button>
|
||||
```
|
||||
|
||||
**wml-target-window** - Specifies target window for wml-window
|
||||
|
||||
```html
|
||||
<button wml-window="Show" wml-target-window="settings">
|
||||
Show Settings
|
||||
</button>
|
||||
```
|
||||
|
||||
**wml-openurl** - Opens a URL in the browser
|
||||
|
||||
```html
|
||||
<a href="#" wml-openurl="https://wails.io">Visit Wails</a>
|
||||
```
|
||||
|
||||
**wml-confirm** - Shows confirmation dialog before action
|
||||
|
||||
```html
|
||||
<button wml-window="Close" wml-confirm="Are you sure you want to close?">
|
||||
Close
|
||||
</button>
|
||||
```
|
||||
|
||||
**Example:**
|
||||
|
||||
```html
|
||||
<div>
|
||||
<button wml-event="save-clicked">Save</button>
|
||||
<button wml-window="Minimise">Minimize</button>
|
||||
<button wml-window="Close" wml-confirm="Close window?">Close</button>
|
||||
<a href="#" wml-openurl="https://github.com/wailsapp/wails">GitHub</a>
|
||||
</div>
|
||||
```
|
||||
|
||||
## Complete Example
|
||||
|
||||
```javascript
|
||||
import { On, Emit } from '@wailsio/runtime/events'
|
||||
import Window from '@wailsio/runtime/window'
|
||||
import { SetText, Text } from '@wailsio/runtime/clipboard'
|
||||
import { Question } from '@wailsio/runtime/dialogs'
|
||||
import { GetAll } from '@wailsio/runtime/screens'
|
||||
|
||||
// Listen for events from Go
|
||||
On('data-updated', (event) => {
|
||||
console.log('Data:', event.data)
|
||||
updateUI(event.data)
|
||||
})
|
||||
|
||||
// Window management
|
||||
document.getElementById('center-btn').addEventListener('click', async () => {
|
||||
await Window.Center()
|
||||
})
|
||||
|
||||
document.getElementById('fullscreen-btn').addEventListener('click', async () => {
|
||||
const isFullscreen = await Window.IsFullscreen()
|
||||
if (isFullscreen) {
|
||||
await Window.UnFullscreen()
|
||||
} else {
|
||||
await Window.Fullscreen()
|
||||
}
|
||||
})
|
||||
|
||||
// Clipboard operations
|
||||
document.getElementById('copy-btn').addEventListener('click', async () => {
|
||||
await SetText('Copied from Wails!')
|
||||
})
|
||||
|
||||
// Dialog with confirmation
|
||||
document.getElementById('delete-btn').addEventListener('click', async () => {
|
||||
const result = await Question({
|
||||
Title: 'Confirm',
|
||||
Message: 'Delete this item?',
|
||||
Buttons: [
|
||||
{ Label: 'Delete' },
|
||||
{ Label: 'Cancel', IsDefault: true }
|
||||
]
|
||||
})
|
||||
|
||||
if (result === 'Delete') {
|
||||
await Emit('delete-item', { id: currentItemId })
|
||||
}
|
||||
})
|
||||
|
||||
// Screen information
|
||||
const screens = await GetAll()
|
||||
console.log(`Detected ${screens.length} screen(s)`)
|
||||
screens.forEach(screen => {
|
||||
console.log(`- ${screen.Name}: ${screen.Size.Width}x${screen.Size.Height}`)
|
||||
})
|
||||
```
|
||||
|
||||
## Best Practices
|
||||
|
||||
### ✅ Do
|
||||
|
||||
- **Import selectively** - Only import what you need
|
||||
- **Handle promises** - All methods return promises
|
||||
- **Use WML for simple actions** - Cleaner than JavaScript
|
||||
- **Check return values** - Especially for dialogs
|
||||
- **Unsubscribe events** - Clean up when done
|
||||
|
||||
### ❌ Don't
|
||||
|
||||
- **Don't forget await** - Most methods are async
|
||||
- **Don't block UI** - Use async/await properly
|
||||
- **Don't ignore errors** - Always handle rejections
|
||||
|
||||
## TypeScript Support
|
||||
|
||||
The runtime includes full TypeScript definitions:
|
||||
|
||||
```typescript
|
||||
import { On, WailsEvent } from '@wailsio/runtime/events'
|
||||
import Window from '@wailsio/runtime/window'
|
||||
|
||||
On('custom-event', (event: WailsEvent) => {
|
||||
// TypeScript knows event.data, event.name, event.sender
|
||||
console.log(event.data)
|
||||
})
|
||||
|
||||
// All methods are fully typed
|
||||
const size: { width: number, height: number } = await Window.Size()
|
||||
```
|
||||
|
|
@ -1,178 +0,0 @@
|
|||
---
|
||||
title: Menu API
|
||||
description: Complete reference for the Menu API
|
||||
sidebar:
|
||||
order: 3
|
||||
---
|
||||
|
||||
import { Card, CardGrid } from "@astrojs/starlight/components";
|
||||
|
||||
## Overview
|
||||
|
||||
The Menu API provides methods to create and manage application menus, context menus, and system tray menus.
|
||||
|
||||
## Creating Menus
|
||||
|
||||
### NewMenu()
|
||||
|
||||
```go
|
||||
menu := app.NewMenu()
|
||||
```
|
||||
|
||||
### Add()
|
||||
|
||||
```go
|
||||
item := menu.Add("Menu Item")
|
||||
```
|
||||
|
||||
### AddSubmenu()
|
||||
|
||||
```go
|
||||
submenu := menu.AddSubmenu("File")
|
||||
```
|
||||
|
||||
### AddSeparator()
|
||||
|
||||
```go
|
||||
menu.AddSeparator()
|
||||
```
|
||||
|
||||
## Menu Item Methods
|
||||
|
||||
### OnClick()
|
||||
|
||||
```go
|
||||
item.OnClick(func(ctx *application.Context) {
|
||||
fmt.Println("Clicked!")
|
||||
})
|
||||
```
|
||||
|
||||
### SetLabel()
|
||||
|
||||
```go
|
||||
item.SetLabel("New Label")
|
||||
```
|
||||
|
||||
### SetEnabled()
|
||||
|
||||
```go
|
||||
item.SetEnabled(false)
|
||||
menu.Update() // Important!
|
||||
```
|
||||
|
||||
### SetChecked()
|
||||
|
||||
```go
|
||||
item.SetChecked(true)
|
||||
```
|
||||
|
||||
### SetAccelerator()
|
||||
|
||||
```go
|
||||
item.SetAccelerator("Ctrl+S")
|
||||
```
|
||||
|
||||
## Application Menu
|
||||
|
||||
### SetApplicationMenu()
|
||||
|
||||
```go
|
||||
menu := app.NewMenu()
|
||||
fileMenu := menu.AddSubmenu("File")
|
||||
fileMenu.Add("Open").OnClick(openFile)
|
||||
fileMenu.Add("Quit").OnClick(func(ctx *application.Context) {
|
||||
app.Quit()
|
||||
})
|
||||
|
||||
app.SetApplicationMenu(menu)
|
||||
```
|
||||
|
||||
## Context Menu
|
||||
|
||||
### RegisterContextMenu()
|
||||
|
||||
```go
|
||||
menu := app.NewMenu()
|
||||
menu.Add("Copy").OnClick(copyHandler)
|
||||
menu.Add("Paste").OnClick(pasteHandler)
|
||||
|
||||
app.RegisterContextMenu("myContext", menu)
|
||||
```
|
||||
|
||||
## System Tray Menu
|
||||
|
||||
```go
|
||||
tray := app.NewSystemTray()
|
||||
menu := app.NewMenu()
|
||||
menu.Add("Show").OnClick(showWindow)
|
||||
menu.Add("Quit").OnClick(app.Quit)
|
||||
tray.SetMenu(menu)
|
||||
```
|
||||
|
||||
## Complete Example
|
||||
|
||||
```go
|
||||
// Create application menu
|
||||
menu := app.NewMenu()
|
||||
|
||||
// File menu
|
||||
fileMenu := menu.AddSubmenu("File")
|
||||
fileMenu.Add("New").SetAccelerator("Ctrl+N").OnClick(newFile)
|
||||
fileMenu.Add("Open").SetAccelerator("Ctrl+O").OnClick(openFile)
|
||||
fileMenu.AddSeparator()
|
||||
fileMenu.Add("Quit").SetAccelerator("Ctrl+Q").OnClick(func(ctx *application.Context) {
|
||||
app.Quit()
|
||||
})
|
||||
|
||||
// Edit menu
|
||||
editMenu := menu.AddSubmenu("Edit")
|
||||
editMenu.Add("Cut").SetAccelerator("Ctrl+X").OnClick(cut)
|
||||
editMenu.Add("Copy").SetAccelerator("Ctrl+C").OnClick(copy)
|
||||
editMenu.Add("Paste").SetAccelerator("Ctrl+V").OnClick(paste)
|
||||
|
||||
// Set as application menu
|
||||
app.SetApplicationMenu(menu)
|
||||
```
|
||||
|
||||
## Best Practices
|
||||
|
||||
### ✅ Do
|
||||
|
||||
- Call `menu.Update()` after changing item state
|
||||
- Use standard accelerators
|
||||
- Provide clear labels
|
||||
- Group related items
|
||||
|
||||
### ❌ Don't
|
||||
|
||||
- Don't forget to call Update()
|
||||
- Don't use ambiguous labels
|
||||
- Don't overcomplicate menus
|
||||
|
||||
## Next Steps
|
||||
|
||||
<CardGrid>
|
||||
<Card title="Application Menus" icon="list">
|
||||
Learn about application menus.
|
||||
|
||||
[Learn More →](/learn/application-menu)
|
||||
</Card>
|
||||
|
||||
<Card title="Context Menus" icon="puzzle">
|
||||
Create context menus.
|
||||
|
||||
[Learn More →](/learn/context-menu)
|
||||
</Card>
|
||||
|
||||
<Card title="System Tray" icon="star">
|
||||
System tray menus.
|
||||
|
||||
[Learn More →](/learn/system-tray-menu)
|
||||
</Card>
|
||||
|
||||
<Card title="Menu Patterns" icon="open-book">
|
||||
Common menu patterns.
|
||||
|
||||
[Learn More →](/learn/menu-patterns)
|
||||
</Card>
|
||||
</CardGrid>
|
||||
724
docs/src/content/docs/reference/menu.mdx
Normal file
724
docs/src/content/docs/reference/menu.mdx
Normal file
|
|
@ -0,0 +1,724 @@
|
|||
---
|
||||
title: Menu API
|
||||
description: Complete reference for the Menu API
|
||||
sidebar:
|
||||
order: 3
|
||||
---
|
||||
|
||||
import { Card, CardGrid } from "@astrojs/starlight/components";
|
||||
|
||||
## Overview
|
||||
|
||||
The Menu API provides methods to create and manage application menus, context menus, and system tray menus.
|
||||
|
||||
**Menu Types:**
|
||||
- **Application Menus** - Top menu bar (File, Edit, etc.)
|
||||
- **Context Menus** - Right-click menus
|
||||
- **System Tray Menus** - Menus in the system tray/notification area
|
||||
|
||||
## Creating Menus
|
||||
|
||||
### NewMenu()
|
||||
|
||||
Creates a new menu.
|
||||
|
||||
```go
|
||||
func (a *App) NewMenu() *Menu
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
menu := app.NewMenu()
|
||||
```
|
||||
|
||||
## Menu Methods
|
||||
|
||||
### Add()
|
||||
|
||||
Adds a menu item to the menu.
|
||||
|
||||
```go
|
||||
func (m *Menu) Add(label string) *MenuItem
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `label` - The text displayed for the menu item
|
||||
|
||||
**Returns:** The created menu item
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
item := menu.Add("Open File")
|
||||
item.OnClick(func(ctx *application.Context) {
|
||||
// Handle click
|
||||
})
|
||||
```
|
||||
|
||||
### AddSubmenu()
|
||||
|
||||
Adds a submenu to the menu.
|
||||
|
||||
```go
|
||||
func (m *Menu) AddSubmenu(label string) *Menu
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `label` - The submenu label
|
||||
|
||||
**Returns:** The created submenu
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
fileMenu := menu.AddSubmenu("File")
|
||||
fileMenu.Add("New")
|
||||
fileMenu.Add("Open")
|
||||
fileMenu.Add("Save")
|
||||
```
|
||||
|
||||
### AddSeparator()
|
||||
|
||||
Adds a visual separator line between menu items.
|
||||
|
||||
```go
|
||||
func (m *Menu) AddSeparator()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
menu.Add("Copy")
|
||||
menu.Add("Paste")
|
||||
menu.AddSeparator()
|
||||
menu.Add("Select All")
|
||||
```
|
||||
|
||||
**Best practice:** Use separators to group related menu items.
|
||||
|
||||
### AddCheckbox()
|
||||
|
||||
Adds a checkable menu item.
|
||||
|
||||
```go
|
||||
func (m *Menu) AddCheckbox(label string, checked bool) *MenuItem
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `label` - The checkbox label
|
||||
- `checked` - Initial checked state
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
darkMode := menu.AddCheckbox("Dark Mode", false)
|
||||
darkMode.OnClick(func(ctx *application.Context) {
|
||||
isChecked := darkMode.Checked()
|
||||
// Toggle dark mode
|
||||
})
|
||||
```
|
||||
|
||||
### AddRadio()
|
||||
|
||||
Adds a radio menu item (mutually exclusive group).
|
||||
|
||||
```go
|
||||
func (m *Menu) AddRadio(label string, checked bool) *MenuItem
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `label` - The radio button label
|
||||
- `checked` - Initial checked state
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Create radio group for view modes
|
||||
viewMenu := menu.AddSubmenu("View")
|
||||
listView := viewMenu.AddRadio("List View", true)
|
||||
gridView := viewMenu.AddRadio("Grid View", false)
|
||||
treeView := viewMenu.AddRadio("Tree View", false)
|
||||
|
||||
listView.OnClick(func(ctx *application.Context) {
|
||||
setViewMode("list")
|
||||
})
|
||||
gridView.OnClick(func(ctx *application.Context) {
|
||||
setViewMode("grid")
|
||||
})
|
||||
```
|
||||
|
||||
### Update()
|
||||
|
||||
Updates the menu to reflect any changes made to menu items.
|
||||
|
||||
```go
|
||||
func (m *Menu) Update()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
item.SetEnabled(false)
|
||||
menu.Update() // Must call to apply changes
|
||||
```
|
||||
|
||||
**Important:** Always call `Update()` after modifying menu item properties.
|
||||
|
||||
## Menu Item Methods
|
||||
|
||||
### OnClick()
|
||||
|
||||
Registers a click handler for the menu item.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) OnClick(callback func(ctx *application.Context)) *MenuItem
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `callback` - Function called when item is clicked
|
||||
|
||||
**Returns:** The menu item (for chaining)
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
item.OnClick(func(ctx *application.Context) {
|
||||
fmt.Println("Menu item clicked")
|
||||
app.Logger.Info("User clicked menu item")
|
||||
})
|
||||
```
|
||||
|
||||
### SetLabel()
|
||||
|
||||
Changes the menu item's label.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) SetLabel(label string) *MenuItem
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
item.SetLabel("Save As...")
|
||||
menu.Update()
|
||||
```
|
||||
|
||||
### SetEnabled()
|
||||
|
||||
Enables or disables the menu item.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) SetEnabled(enabled bool) *MenuItem
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Disable save when no document is open
|
||||
saveItem.SetEnabled(hasOpenDocument)
|
||||
menu.Update()
|
||||
```
|
||||
|
||||
**Common pattern:**
|
||||
```go
|
||||
// Update menu state based on application state
|
||||
func updateMenuState() {
|
||||
saveItem.SetEnabled(hasUnsavedChanges)
|
||||
undoItem.SetEnabled(canUndo)
|
||||
redoItem.SetEnabled(canRedo)
|
||||
menu.Update()
|
||||
}
|
||||
```
|
||||
|
||||
### SetChecked()
|
||||
|
||||
Sets the checked state for checkbox/radio menu items.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) SetChecked(checked bool) *MenuItem
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
darkModeItem.SetChecked(isDarkModeEnabled)
|
||||
menu.Update()
|
||||
```
|
||||
|
||||
### Checked()
|
||||
|
||||
Returns the current checked state.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) Checked() bool
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
if darkModeItem.Checked() {
|
||||
// Dark mode is enabled
|
||||
}
|
||||
```
|
||||
|
||||
### SetAccelerator()
|
||||
|
||||
Sets a keyboard shortcut for the menu item.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) SetAccelerator(accelerator string) *MenuItem
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `accelerator` - Keyboard shortcut (e.g., "Ctrl+S", "Cmd+Q")
|
||||
|
||||
**Accelerator format:**
|
||||
- **Modifiers:** `Ctrl`, `Cmd`, `Alt`, `Shift`
|
||||
- **Keys:** `A-Z`, `0-9`, `F1-F12`, `Enter`, `Backspace`, etc.
|
||||
- **Platform:** Use `Cmd` on macOS, `Ctrl` on Windows/Linux
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
saveItem.SetAccelerator("Ctrl+S")
|
||||
quitItem.SetAccelerator("Ctrl+Q")
|
||||
newItem.SetAccelerator("Ctrl+N")
|
||||
```
|
||||
|
||||
**Platform-aware example:**
|
||||
```go
|
||||
import "runtime"
|
||||
|
||||
var quitShortcut string
|
||||
if runtime.GOOS == "darwin" {
|
||||
quitShortcut = "Cmd+Q"
|
||||
} else {
|
||||
quitShortcut = "Ctrl+Q"
|
||||
}
|
||||
quitItem.SetAccelerator(quitShortcut)
|
||||
```
|
||||
|
||||
### SetTooltip()
|
||||
|
||||
Sets a tooltip that appears when hovering over the menu item.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) SetTooltip(tooltip string) *MenuItem
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
item.SetTooltip("Opens a file from disk")
|
||||
```
|
||||
|
||||
### SetHidden()
|
||||
|
||||
Shows or hides the menu item.
|
||||
|
||||
```go
|
||||
func (mi *MenuItem) SetHidden(hidden bool) *MenuItem
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Hide debug menu in production
|
||||
debugItem.SetHidden(!isDevelopment)
|
||||
menu.Update()
|
||||
```
|
||||
|
||||
## Application Menu
|
||||
|
||||
### SetApplicationMenu()
|
||||
|
||||
Sets the application's main menu bar.
|
||||
|
||||
```go
|
||||
func (a *App) SetApplicationMenu(menu *Menu)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
menu := app.NewMenu()
|
||||
|
||||
// File menu
|
||||
fileMenu := menu.AddSubmenu("File")
|
||||
fileMenu.Add("New").SetAccelerator("Ctrl+N").OnClick(newFile)
|
||||
fileMenu.Add("Open").SetAccelerator("Ctrl+O").OnClick(openFile)
|
||||
fileMenu.Add("Save").SetAccelerator("Ctrl+S").OnClick(saveFile)
|
||||
fileMenu.AddSeparator()
|
||||
fileMenu.Add("Exit").SetAccelerator("Ctrl+Q").OnClick(func(ctx *application.Context) {
|
||||
app.Quit()
|
||||
})
|
||||
|
||||
// Edit menu
|
||||
editMenu := menu.AddSubmenu("Edit")
|
||||
editMenu.Add("Undo").SetAccelerator("Ctrl+Z").OnClick(undo)
|
||||
editMenu.Add("Redo").SetAccelerator("Ctrl+Y").OnClick(redo)
|
||||
editMenu.AddSeparator()
|
||||
editMenu.Add("Cut").SetAccelerator("Ctrl+X").OnClick(cut)
|
||||
editMenu.Add("Copy").SetAccelerator("Ctrl+C").OnClick(copy)
|
||||
editMenu.Add("Paste").SetAccelerator("Ctrl+V").OnClick(paste)
|
||||
|
||||
app.SetApplicationMenu(menu)
|
||||
```
|
||||
|
||||
**Platform notes:**
|
||||
- **macOS:** Menu appears in the top menu bar
|
||||
- **Windows/Linux:** Menu appears in the window title bar
|
||||
- **macOS:** Automatically adds application menu with app name
|
||||
|
||||
## Context Menus
|
||||
|
||||
### RegisterContextMenu()
|
||||
|
||||
Registers a context menu (right-click menu) with a specific name.
|
||||
|
||||
```go
|
||||
func (a *App) RegisterContextMenu(name string, menu *Menu)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `name` - Unique identifier for the context menu
|
||||
- `menu` - The menu to show
|
||||
|
||||
**Go:**
|
||||
|
||||
```go
|
||||
// Create context menu
|
||||
contextMenu := app.NewMenu()
|
||||
contextMenu.Add("Cut").OnClick(cut)
|
||||
contextMenu.Add("Copy").OnClick(copy)
|
||||
contextMenu.Add("Paste").OnClick(paste)
|
||||
contextMenu.AddSeparator()
|
||||
contextMenu.Add("Select All").OnClick(selectAll)
|
||||
|
||||
// Register it
|
||||
app.RegisterContextMenu("editor", contextMenu)
|
||||
```
|
||||
|
||||
**HTML:**
|
||||
|
||||
```html
|
||||
<!-- Trigger context menu on right-click -->
|
||||
<div data-wails-context-menu="editor">
|
||||
Right-click here for context menu
|
||||
</div>
|
||||
```
|
||||
|
||||
**Dynamic context menus:**
|
||||
```go
|
||||
// Update context menu based on selection
|
||||
func updateContextMenu() {
|
||||
contextMenu := app.NewMenu()
|
||||
|
||||
if hasSelection {
|
||||
contextMenu.Add("Cut").OnClick(cut)
|
||||
contextMenu.Add("Copy").OnClick(copy)
|
||||
}
|
||||
|
||||
contextMenu.Add("Paste").SetEnabled(hasClipboardContent).OnClick(paste)
|
||||
|
||||
app.RegisterContextMenu("editor", contextMenu)
|
||||
}
|
||||
```
|
||||
|
||||
## System Tray Menu
|
||||
|
||||
### NewSystemTray()
|
||||
|
||||
Creates a new system tray icon.
|
||||
|
||||
```go
|
||||
func (a *App) NewSystemTray() *SystemTray
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
tray := app.NewSystemTray()
|
||||
```
|
||||
|
||||
### SetIcon()
|
||||
|
||||
Sets the system tray icon.
|
||||
|
||||
```go
|
||||
func (st *SystemTray) SetIcon(icon []byte) *SystemTray
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
iconData, _ := os.ReadFile("icon.png")
|
||||
tray.SetIcon(iconData)
|
||||
```
|
||||
|
||||
### SetMenu()
|
||||
|
||||
Sets the menu for the system tray.
|
||||
|
||||
```go
|
||||
func (st *SystemTray) SetMenu(menu *Menu) *SystemTray
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
trayMenu := app.NewMenu()
|
||||
trayMenu.Add("Show Window").OnClick(func(ctx *application.Context) {
|
||||
window.Show()
|
||||
window.SetFocus()
|
||||
})
|
||||
trayMenu.Add("Settings").OnClick(openSettings)
|
||||
trayMenu.AddSeparator()
|
||||
trayMenu.Add("Quit").OnClick(func(ctx *application.Context) {
|
||||
app.Quit()
|
||||
})
|
||||
|
||||
tray.SetMenu(trayMenu)
|
||||
```
|
||||
|
||||
### SetTooltip()
|
||||
|
||||
Sets the tooltip shown when hovering over the tray icon.
|
||||
|
||||
```go
|
||||
func (st *SystemTray) SetTooltip(tooltip string) *SystemTray
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
tray.SetTooltip("My Application - Running")
|
||||
```
|
||||
|
||||
### OnClick()
|
||||
|
||||
Handles left-click on the tray icon.
|
||||
|
||||
```go
|
||||
func (st *SystemTray) OnClick(callback func()) *SystemTray
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
tray.OnClick(func() {
|
||||
if window.IsVisible() {
|
||||
window.Hide()
|
||||
} else {
|
||||
window.Show()
|
||||
window.SetFocus()
|
||||
}
|
||||
})
|
||||
```
|
||||
|
||||
## Complete Examples
|
||||
|
||||
### Standard Application Menu
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/wailsapp/wails/v3/pkg/application"
|
||||
)
|
||||
|
||||
func createMenu(app *application.Application) *application.Menu {
|
||||
menu := app.NewMenu()
|
||||
|
||||
// File menu
|
||||
fileMenu := menu.AddSubmenu("File")
|
||||
fileMenu.Add("New").
|
||||
SetAccelerator("Ctrl+N").
|
||||
OnClick(func(ctx *application.Context) {
|
||||
// Create new document
|
||||
})
|
||||
fileMenu.Add("Open").
|
||||
SetAccelerator("Ctrl+O").
|
||||
OnClick(func(ctx *application.Context) {
|
||||
// Open file dialog
|
||||
})
|
||||
fileMenu.Add("Save").
|
||||
SetAccelerator("Ctrl+S").
|
||||
OnClick(func(ctx *application.Context) {
|
||||
// Save document
|
||||
})
|
||||
fileMenu.AddSeparator()
|
||||
fileMenu.Add("Exit").OnClick(func(ctx *application.Context) {
|
||||
app.Quit()
|
||||
})
|
||||
|
||||
// Edit menu
|
||||
editMenu := menu.AddSubmenu("Edit")
|
||||
editMenu.Add("Undo").SetAccelerator("Ctrl+Z")
|
||||
editMenu.Add("Redo").SetAccelerator("Ctrl+Y")
|
||||
editMenu.AddSeparator()
|
||||
editMenu.Add("Cut").SetAccelerator("Ctrl+X")
|
||||
editMenu.Add("Copy").SetAccelerator("Ctrl+C")
|
||||
editMenu.Add("Paste").SetAccelerator("Ctrl+V")
|
||||
|
||||
// View menu
|
||||
viewMenu := menu.AddSubmenu("View")
|
||||
darkMode := viewMenu.AddCheckbox("Dark Mode", false)
|
||||
darkMode.OnClick(func(ctx *application.Context) {
|
||||
// Toggle dark mode
|
||||
isChecked := darkMode.Checked()
|
||||
app.Logger.Info("Dark mode", "enabled", isChecked)
|
||||
})
|
||||
viewMenu.AddSeparator()
|
||||
viewMenu.AddRadio("List View", true)
|
||||
viewMenu.AddRadio("Grid View", false)
|
||||
viewMenu.AddRadio("Detail View", false)
|
||||
|
||||
// Help menu
|
||||
helpMenu := menu.AddSubmenu("Help")
|
||||
helpMenu.Add("Documentation").OnClick(func(ctx *application.Context) {
|
||||
// Open docs
|
||||
})
|
||||
helpMenu.Add("About").OnClick(func(ctx *application.Context) {
|
||||
// Show about dialog
|
||||
})
|
||||
|
||||
return menu
|
||||
}
|
||||
|
||||
func main() {
|
||||
app := application.New(application.Options{
|
||||
Name: "Menu Demo",
|
||||
})
|
||||
|
||||
menu := createMenu(app)
|
||||
app.SetApplicationMenu(menu)
|
||||
|
||||
window := app.NewWebviewWindow()
|
||||
window.Show()
|
||||
|
||||
app.Run()
|
||||
}
|
||||
```
|
||||
|
||||
### System Tray Application
|
||||
|
||||
```go
|
||||
func setupSystemTray(app *application.Application, window *application.Window) {
|
||||
// Create system tray
|
||||
tray := app.NewSystemTray()
|
||||
|
||||
// Set icon
|
||||
iconData, _ := os.ReadFile("icon.png")
|
||||
tray.SetIcon(iconData)
|
||||
tray.SetTooltip("My App - Running")
|
||||
|
||||
// Handle left-click on tray icon
|
||||
tray.OnClick(func() {
|
||||
if window.IsVisible() {
|
||||
window.Hide()
|
||||
} else {
|
||||
window.Show()
|
||||
window.SetFocus()
|
||||
}
|
||||
})
|
||||
|
||||
// Create tray menu
|
||||
trayMenu := app.NewMenu()
|
||||
|
||||
showItem := trayMenu.Add("Show Window")
|
||||
showItem.OnClick(func(ctx *application.Context) {
|
||||
window.Show()
|
||||
window.SetFocus()
|
||||
})
|
||||
|
||||
trayMenu.AddSeparator()
|
||||
|
||||
trayMenu.Add("Settings").OnClick(func(ctx *application.Context) {
|
||||
// Open settings window
|
||||
})
|
||||
|
||||
trayMenu.Add("About").OnClick(func(ctx *application.Context) {
|
||||
// Show about dialog
|
||||
})
|
||||
|
||||
trayMenu.AddSeparator()
|
||||
|
||||
trayMenu.Add("Quit").OnClick(func(ctx *application.Context) {
|
||||
app.Quit()
|
||||
})
|
||||
|
||||
tray.SetMenu(trayMenu)
|
||||
}
|
||||
```
|
||||
|
||||
### Dynamic Menu Updates
|
||||
|
||||
```go
|
||||
type Editor struct {
|
||||
app *application.Application
|
||||
menu *application.Menu
|
||||
undoItem *application.MenuItem
|
||||
redoItem *application.MenuItem
|
||||
saveItem *application.MenuItem
|
||||
undoStack []string
|
||||
redoStack []string
|
||||
hasChanges bool
|
||||
}
|
||||
|
||||
func (e *Editor) createMenu() {
|
||||
e.menu = e.app.NewMenu()
|
||||
|
||||
fileMenu := e.menu.AddSubmenu("File")
|
||||
e.saveItem = fileMenu.Add("Save").SetAccelerator("Ctrl+S")
|
||||
e.saveItem.OnClick(func(ctx *application.Context) {
|
||||
e.save()
|
||||
})
|
||||
|
||||
editMenu := e.menu.AddSubmenu("Edit")
|
||||
e.undoItem = editMenu.Add("Undo").SetAccelerator("Ctrl+Z")
|
||||
e.undoItem.OnClick(func(ctx *application.Context) {
|
||||
e.undo()
|
||||
})
|
||||
|
||||
e.redoItem = editMenu.Add("Redo").SetAccelerator("Ctrl+Y")
|
||||
e.redoItem.OnClick(func(ctx *application.Context) {
|
||||
e.redo()
|
||||
})
|
||||
|
||||
e.updateMenuState()
|
||||
e.app.SetApplicationMenu(e.menu)
|
||||
}
|
||||
|
||||
func (e *Editor) updateMenuState() {
|
||||
// Update menu items based on current state
|
||||
e.saveItem.SetEnabled(e.hasChanges)
|
||||
e.undoItem.SetEnabled(len(e.undoStack) > 0)
|
||||
e.redoItem.SetEnabled(len(e.redoStack) > 0)
|
||||
e.menu.Update()
|
||||
}
|
||||
|
||||
func (e *Editor) onChange() {
|
||||
e.hasChanges = true
|
||||
e.updateMenuState()
|
||||
}
|
||||
|
||||
func (e *Editor) save() {
|
||||
// Save logic
|
||||
e.hasChanges = false
|
||||
e.updateMenuState()
|
||||
}
|
||||
```
|
||||
|
||||
## Best Practices
|
||||
|
||||
### ✅ Do
|
||||
|
||||
- **Use standard accelerators** - Follow platform conventions (Ctrl+C for copy, etc.)
|
||||
- **Call Update() after changes** - Menu won't reflect changes otherwise
|
||||
- **Group related items** - Use separators to organize menu items
|
||||
- **Disable unavailable actions** - Don't hide, disable with SetEnabled(false)
|
||||
- **Use clear labels** - Be concise and descriptive
|
||||
- **Follow platform conventions** - macOS vs Windows/Linux menu patterns
|
||||
|
||||
### ❌ Don't
|
||||
|
||||
- **Don't forget Update()** - Most common mistake
|
||||
- **Don't nest too deeply** - Keep menus 2-3 levels maximum
|
||||
- **Don't use ambiguous labels** - "Process" vs "Process Document"
|
||||
- **Don't overcomplicate** - Keep menus simple and focused
|
||||
- **Don't mix metaphors** - Consistent naming and organization
|
||||
|
||||
## Platform-Specific Notes
|
||||
|
||||
### macOS
|
||||
|
||||
- Application menu automatically added with app name
|
||||
- Use `Cmd` instead of `Ctrl` for accelerators
|
||||
- "About", "Preferences", and "Quit" in application menu by default
|
||||
|
||||
### Windows/Linux
|
||||
|
||||
- No automatic application menu
|
||||
- Use `Ctrl` for accelerators
|
||||
- "Exit" typically in File menu
|
||||
|
|
@ -12,98 +12,18 @@ import { Card, CardGrid, Tabs, TabItem } from "@astrojs/starlight/components";
|
|||
This is the complete API reference for Wails v3. It documents every public type, method, and option available in the framework.
|
||||
|
||||
**Organisation:**
|
||||
- **Application** - Core application APIs
|
||||
- **Window** - Window creation and management
|
||||
- **Menu** - Application, context, and system tray menus
|
||||
- **Events** - Event system and built-in events
|
||||
- **Dialogs** - File and message dialogs
|
||||
- **Runtime** - Frontend runtime APIs
|
||||
- **CLI** - Command-line interface
|
||||
|
||||
## Quick Navigation
|
||||
|
||||
<CardGrid>
|
||||
<Card title="Application API" icon="seti:go">
|
||||
Core application creation and lifecycle.
|
||||
|
||||
- `application.New()`
|
||||
- `application.Options`
|
||||
- `app.Run()`
|
||||
- Lifecycle hooks
|
||||
|
||||
[View API →](/reference/application/core)
|
||||
</Card>
|
||||
|
||||
<Card title="Window API" icon="laptop">
|
||||
Window creation and management.
|
||||
|
||||
- `app.NewWebviewWindow()`
|
||||
- `WebviewWindow` methods
|
||||
- Window options
|
||||
- Window events
|
||||
|
||||
[View API →](/reference/window/webview-window)
|
||||
</Card>
|
||||
|
||||
<Card title="Menu API" icon="list-format">
|
||||
Menu creation and management.
|
||||
|
||||
- Application menus
|
||||
- Context menus
|
||||
- System tray menus
|
||||
- Menu items
|
||||
|
||||
[View API →](/reference/menu/application-menu)
|
||||
</Card>
|
||||
|
||||
<Card title="Events API" icon="rocket">
|
||||
Event system and built-in events.
|
||||
|
||||
- `app.EmitEvent()`
|
||||
- `app.OnEvent()`
|
||||
- Built-in events
|
||||
- Custom events
|
||||
|
||||
[View API →](/reference/events/system)
|
||||
</Card>
|
||||
|
||||
<Card title="Dialogs API" icon="approve-check">
|
||||
File and message dialogs.
|
||||
|
||||
- File open/save
|
||||
- Message dialogs
|
||||
- dialog options
|
||||
- Platform behaviour
|
||||
|
||||
[View API →](/reference/dialogs/file)
|
||||
</Card>
|
||||
|
||||
<Card title="Runtime API" icon="seti:javascript">
|
||||
Frontend runtime APIs (JavaScript).
|
||||
|
||||
- Window management
|
||||
- Events
|
||||
- Clipboard
|
||||
- Browser
|
||||
|
||||
[View API →](/reference/runtime/window)
|
||||
</Card>
|
||||
|
||||
<Card title="CLI Reference" icon="seti:shell">
|
||||
Command-line interface.
|
||||
|
||||
- `wails3 init`
|
||||
- `wails3 dev`
|
||||
- `wails3 build`
|
||||
- All commands
|
||||
|
||||
[View API →](/reference/cli/init)
|
||||
</Card>
|
||||
</CardGrid>
|
||||
- [Application](/reference/application) - Core application APIs
|
||||
- [Window](/reference/window) - Window creation and management
|
||||
- [Menu](/reference/menu) - Application, context, and system tray menus
|
||||
- [Events](/reference/events) - Event system and built-in events
|
||||
- [Dialogs](/reference/dialogs) - File and message dialogs
|
||||
- [Frontend Runtime](/reference/frontend-runtime) - Frontend runtime APIs
|
||||
- [CLI](/reference/cli) - Command-line interface
|
||||
|
||||
## API Conventions
|
||||
|
||||
### Go API Conventions
|
||||
<details>
|
||||
<summary><strong>Go API Conventions</strong> - For developers new to Go</summary>
|
||||
|
||||
#### Naming
|
||||
|
||||
|
|
@ -145,6 +65,8 @@ app := application.New(application.Options{
|
|||
})
|
||||
```
|
||||
|
||||
</details>
|
||||
|
||||
### JavaScript API Conventions
|
||||
|
||||
#### Naming
|
||||
|
|
|
|||
|
|
@ -1,92 +0,0 @@
|
|||
---
|
||||
title: Runtime Overview
|
||||
description: The Wails JavaScript runtime package for frontend integration
|
||||
sidebar:
|
||||
order: 1
|
||||
---
|
||||
|
||||
The Wails runtime is the standard library for Wails applications. It provides a
|
||||
number of features that may be used in your applications, including:
|
||||
|
||||
- Window management
|
||||
- Dialogs
|
||||
- Browser integration
|
||||
- Clipboard
|
||||
- Menus
|
||||
- System information
|
||||
- Events
|
||||
- Context Menus
|
||||
- Screens
|
||||
- WML (Wails Markup Language)
|
||||
|
||||
The runtime is required for integration between Go and the frontend. There are 2
|
||||
ways to integrate the runtime:
|
||||
|
||||
- Using the `@wailsio/runtime` package
|
||||
- Using a pre-built bundle
|
||||
|
||||
## Using the npm package
|
||||
|
||||
The `@wailsio/runtime` package is a JavaScript package that provides access to
|
||||
the Wails runtime from the frontend. It is used by all standard templates
|
||||
and is the recommended way to integrate the runtime into your application.
|
||||
By using the `@wailsio/runtime` package, you will only include the parts of the runtime that you use.
|
||||
|
||||
The package is available on npm and can be installed using:
|
||||
|
||||
```shell
|
||||
npm install --save @wailsio/runtime
|
||||
```
|
||||
|
||||
## Using a pre-built bundle
|
||||
|
||||
Some projects will not use a Javascript bundler and may prefer to use a
|
||||
pre-built bundled version of the runtime. This version can be generated locally
|
||||
using the following command:
|
||||
|
||||
```shell
|
||||
wails3 generate runtime
|
||||
```
|
||||
|
||||
The command will output a `runtime.js` (and `runtime.debug.js`) file in the current
|
||||
directory. This file is an ES module that can be imported by your application scripts
|
||||
just like the npm package, but the API is also exported to the global window object,
|
||||
so for simpler applications you can use it as follows:
|
||||
|
||||
```html
|
||||
<html>
|
||||
<head>
|
||||
<script type="module" src="./runtime.js"></script>
|
||||
<script>
|
||||
window.onload = function () {
|
||||
wails.Window.SetTitle("A new window title");
|
||||
}
|
||||
</script>
|
||||
</head>
|
||||
<!--- ... -->
|
||||
</html>
|
||||
```
|
||||
|
||||
:::caution
|
||||
It is important to include the `type="module"` attribute on the `<script>` tag that loads the runtime
|
||||
and to wait for the page to be fully loaded before calling the API,
|
||||
because scripts with the `type="module"` attribute run asynchronously.
|
||||
:::
|
||||
|
||||
## Initialisation
|
||||
|
||||
Apart from the API functions, the runtime provides support for context menus and window dragging.
|
||||
These features will only work as expected after the runtime has been initialised.
|
||||
Even if you don't use the API, make sure to include a side-effect import statement
|
||||
somewhere in your frontend code:
|
||||
|
||||
```javascript
|
||||
import "@wailsio/runtime";
|
||||
```
|
||||
|
||||
Your bundler should detect the presence of side-effects and include
|
||||
all required initialisation code in the build.
|
||||
|
||||
:::note
|
||||
If you prefer the pre-built bundle, adding a script tag as shown above suffices.
|
||||
:::
|
||||
|
|
@ -1,223 +0,0 @@
|
|||
---
|
||||
title: Window API
|
||||
description: Complete reference for the Window API
|
||||
sidebar:
|
||||
order: 2
|
||||
---
|
||||
|
||||
import { Card, CardGrid } from "@astrojs/starlight/components";
|
||||
|
||||
## Overview
|
||||
|
||||
The Window API provides methods to control window appearance, behaviour, and lifecycle. Access through window instances or the Window manager.
|
||||
|
||||
## Core Methods
|
||||
|
||||
### Show() / Hide()
|
||||
|
||||
```go
|
||||
window.Show() // Show window
|
||||
window.Hide() // Hide window
|
||||
```
|
||||
|
||||
### Close()
|
||||
|
||||
```go
|
||||
window.Close() // Close window
|
||||
```
|
||||
|
||||
### SetTitle()
|
||||
|
||||
```go
|
||||
window.SetTitle("New Title")
|
||||
```
|
||||
|
||||
### SetSize()
|
||||
|
||||
```go
|
||||
window.SetSize(800, 600)
|
||||
```
|
||||
|
||||
### Size()
|
||||
|
||||
```go
|
||||
width, height := window.Size()
|
||||
```
|
||||
|
||||
### SetPosition()
|
||||
|
||||
```go
|
||||
window.SetPosition(100, 100)
|
||||
```
|
||||
|
||||
### Position()
|
||||
|
||||
```go
|
||||
x, y := window.Position()
|
||||
```
|
||||
|
||||
### Centre()
|
||||
|
||||
```go
|
||||
window.Centre() // Centre on screen
|
||||
```
|
||||
|
||||
### SetFocus()
|
||||
|
||||
```go
|
||||
window.SetFocus() // Bring to front
|
||||
```
|
||||
|
||||
## State Methods
|
||||
|
||||
### Minimise() / UnMinimise()
|
||||
|
||||
```go
|
||||
window.Minimise()
|
||||
window.UnMinimise()
|
||||
```
|
||||
|
||||
### Maximise() / UnMaximise()
|
||||
|
||||
```go
|
||||
window.Maximise()
|
||||
window.UnMaximise()
|
||||
```
|
||||
|
||||
### Fullscreen() / UnFullscreen()
|
||||
|
||||
```go
|
||||
window.Fullscreen()
|
||||
window.UnFullscreen()
|
||||
```
|
||||
|
||||
### IsMinimised() / IsMaximised() / IsFullscreen()
|
||||
|
||||
```go
|
||||
if window.IsMinimised() {
|
||||
window.UnMinimise()
|
||||
}
|
||||
```
|
||||
|
||||
## Content Methods
|
||||
|
||||
### SetURL()
|
||||
|
||||
```go
|
||||
window.SetURL("http://wails.localhost/page.html")
|
||||
```
|
||||
|
||||
### SetHTML()
|
||||
|
||||
```go
|
||||
window.SetHTML("<h1>Hello</h1>")
|
||||
```
|
||||
|
||||
### Reload()
|
||||
|
||||
```go
|
||||
window.Reload() // Reload content
|
||||
```
|
||||
|
||||
## Event Methods
|
||||
|
||||
### OnClose()
|
||||
|
||||
```go
|
||||
window.OnClose(func() bool {
|
||||
// Return false to prevent close
|
||||
return true
|
||||
})
|
||||
```
|
||||
|
||||
### OnFocus() / OnBlur()
|
||||
|
||||
```go
|
||||
window.OnFocus(func() {
|
||||
fmt.Println("Window focused")
|
||||
})
|
||||
|
||||
window.OnBlur(func() {
|
||||
fmt.Println("Window lost focus")
|
||||
})
|
||||
```
|
||||
|
||||
### EmitEvent()
|
||||
|
||||
```go
|
||||
window.EmitEvent("custom-event", data)
|
||||
```
|
||||
|
||||
## Properties
|
||||
|
||||
### Name()
|
||||
|
||||
```go
|
||||
name := window.Name()
|
||||
```
|
||||
|
||||
### SetEnabled()
|
||||
|
||||
```go
|
||||
window.SetEnabled(false) // Disable window
|
||||
```
|
||||
|
||||
## Complete Example
|
||||
|
||||
```go
|
||||
// Create and configure window
|
||||
window := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
|
||||
Title: "My Window",
|
||||
Width: 800,
|
||||
Height: 600,
|
||||
})
|
||||
|
||||
// Set up event handlers
|
||||
window.OnClose(func() bool {
|
||||
result, _ := app.QuestionDialog().
|
||||
SetMessage("Close window?").
|
||||
SetButtons("Yes", "No").
|
||||
Show()
|
||||
return result == "Yes"
|
||||
})
|
||||
|
||||
window.OnFocus(func() {
|
||||
window.SetTitle("My Window (Active)")
|
||||
})
|
||||
|
||||
window.OnBlur(func() {
|
||||
window.SetTitle("My Window")
|
||||
})
|
||||
|
||||
// Show window
|
||||
window.Centre()
|
||||
window.Show()
|
||||
```
|
||||
|
||||
## Next Steps
|
||||
|
||||
<CardGrid>
|
||||
<Card title="Application API" icon="rocket">
|
||||
Application methods and managers.
|
||||
|
||||
[Learn More →](/reference/application-api)
|
||||
</Card>
|
||||
|
||||
<Card title="Window Basics" icon="laptop">
|
||||
Learn window management.
|
||||
|
||||
[Learn More →](/features/windows/basics)
|
||||
</Card>
|
||||
|
||||
<Card title="Window Options" icon="seti:config">
|
||||
All window configuration options.
|
||||
|
||||
[Learn More →](/features/windows/options)
|
||||
</Card>
|
||||
|
||||
<Card title="Events" icon="star">
|
||||
Window event handling.
|
||||
|
||||
[Learn More →](/features/windows/events)
|
||||
</Card>
|
||||
</CardGrid>
|
||||
644
docs/src/content/docs/reference/window.mdx
Normal file
644
docs/src/content/docs/reference/window.mdx
Normal file
|
|
@ -0,0 +1,644 @@
|
|||
---
|
||||
title: Window API
|
||||
description: Complete reference for the Window API
|
||||
sidebar:
|
||||
order: 2
|
||||
---
|
||||
|
||||
import { Card, CardGrid } from "@astrojs/starlight/components";
|
||||
|
||||
## Overview
|
||||
|
||||
The Window API provides methods to control window appearance, behaviour, and lifecycle. Access through window instances or the Window manager.
|
||||
|
||||
**Common operations:**
|
||||
- Create and show windows
|
||||
- Control size, position, and state
|
||||
- Handle window events
|
||||
- Manage window content
|
||||
- Configure appearance and behaviour
|
||||
|
||||
## Visibility
|
||||
|
||||
### Show()
|
||||
|
||||
Shows the window. If the window was hidden, it becomes visible.
|
||||
|
||||
```go
|
||||
func (w *Window) Show()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
window := app.NewWebviewWindow()
|
||||
window.Show()
|
||||
```
|
||||
|
||||
### Hide()
|
||||
|
||||
Hides the window without closing it. The window remains in memory and can be shown again.
|
||||
|
||||
```go
|
||||
func (w *Window) Hide()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Hide window temporarily
|
||||
window.Hide()
|
||||
|
||||
// Show it again later
|
||||
window.Show()
|
||||
```
|
||||
|
||||
**Use cases:**
|
||||
- System tray applications that hide to tray
|
||||
- Wizard flows where windows are reused
|
||||
- Temporary hiding during operations
|
||||
|
||||
### Close()
|
||||
|
||||
Closes the window. This triggers the `WindowClosing` event.
|
||||
|
||||
```go
|
||||
func (w *Window) Close()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
window.Close()
|
||||
```
|
||||
|
||||
**Note:** If a registered hook calls `event.Cancel()`, the close will be prevented.
|
||||
|
||||
## Window Properties
|
||||
|
||||
### SetTitle()
|
||||
|
||||
Sets the window title bar text.
|
||||
|
||||
```go
|
||||
func (w *Window) SetTitle(title string)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `title` - The new window title
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
window.SetTitle("My Application - Document.txt")
|
||||
```
|
||||
|
||||
### Name()
|
||||
|
||||
Returns the window's unique name identifier.
|
||||
|
||||
```go
|
||||
func (w *Window) Name() string
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
name := window.Name()
|
||||
fmt.Println("Window name:", name)
|
||||
|
||||
// Retrieve window by name later
|
||||
window := app.GetWindowByName(name)
|
||||
```
|
||||
|
||||
## Size and Position
|
||||
|
||||
### SetSize()
|
||||
|
||||
Sets the window dimensions in pixels.
|
||||
|
||||
```go
|
||||
func (w *Window) SetSize(width, height int)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `width` - Window width in pixels
|
||||
- `height` - Window height in pixels
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
window.SetSize(1024, 768)
|
||||
```
|
||||
|
||||
### Size()
|
||||
|
||||
Returns the current window dimensions.
|
||||
|
||||
```go
|
||||
func (w *Window) Size() (width, height int)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
width, height := window.Size()
|
||||
fmt.Printf("Window is %dx%d\n", width, height)
|
||||
```
|
||||
|
||||
### SetMinSize() / SetMaxSize()
|
||||
|
||||
Sets minimum and maximum window dimensions.
|
||||
|
||||
```go
|
||||
func (w *Window) SetMinSize(width, height int)
|
||||
func (w *Window) SetMaxSize(width, height int)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Prevent window from being too small
|
||||
window.SetMinSize(800, 600)
|
||||
|
||||
// Prevent window from being too large
|
||||
window.SetMaxSize(1920, 1080)
|
||||
```
|
||||
|
||||
### SetPosition()
|
||||
|
||||
Sets the window position relative to the top-left corner of the screen.
|
||||
|
||||
```go
|
||||
func (w *Window) SetPosition(x, y int)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `x` - Horizontal position in pixels
|
||||
- `y` - Vertical position in pixels
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Position window at top-left
|
||||
window.SetPosition(0, 0)
|
||||
|
||||
// Position window 100px from top-left
|
||||
window.SetPosition(100, 100)
|
||||
```
|
||||
|
||||
### Position()
|
||||
|
||||
Returns the current window position.
|
||||
|
||||
```go
|
||||
func (w *Window) Position() (x, y int)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
x, y := window.Position()
|
||||
fmt.Printf("Window is at (%d, %d)\n", x, y)
|
||||
```
|
||||
|
||||
### Centre()
|
||||
|
||||
Centers the window on the screen.
|
||||
|
||||
```go
|
||||
func (w *Window) Centre()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
window := app.NewWebviewWindow()
|
||||
window.Centre()
|
||||
window.Show()
|
||||
```
|
||||
|
||||
**Note:** Centre on the primary monitor. For multi-monitor setups, see screen APIs.
|
||||
|
||||
### SetFocus()
|
||||
|
||||
Brings the window to the front and gives it keyboard focus.
|
||||
|
||||
```go
|
||||
func (w *Window) SetFocus()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Bring window to front
|
||||
window.SetFocus()
|
||||
```
|
||||
|
||||
## Window State
|
||||
|
||||
### Minimise() / UnMinimise()
|
||||
|
||||
Minimizes the window to the taskbar/dock or restores it.
|
||||
|
||||
```go
|
||||
func (w *Window) Minimise()
|
||||
func (w *Window) UnMinimise()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Minimize window
|
||||
window.Minimise()
|
||||
|
||||
// Restore from minimized state
|
||||
window.UnMinimise()
|
||||
```
|
||||
|
||||
### Maximise() / UnMaximise()
|
||||
|
||||
Maximizes the window to fill the screen or restores it to its previous size.
|
||||
|
||||
```go
|
||||
func (w *Window) Maximise()
|
||||
func (w *Window) UnMaximise()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Maximize window
|
||||
window.Maximise()
|
||||
|
||||
// Restore to previous size
|
||||
window.UnMaximise()
|
||||
```
|
||||
|
||||
### Fullscreen() / UnFullscreen()
|
||||
|
||||
Enters or exits fullscreen mode.
|
||||
|
||||
```go
|
||||
func (w *Window) Fullscreen()
|
||||
func (w *Window) UnFullscreen()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Enter fullscreen
|
||||
window.Fullscreen()
|
||||
|
||||
// Exit fullscreen
|
||||
window.UnFullscreen()
|
||||
```
|
||||
|
||||
### IsMinimised() / IsMaximised() / IsFullscreen()
|
||||
|
||||
Checks the current window state.
|
||||
|
||||
```go
|
||||
func (w *Window) IsMinimised() bool
|
||||
func (w *Window) IsMaximised() bool
|
||||
func (w *Window) IsFullscreen() bool
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
if window.IsMinimised() {
|
||||
window.UnMinimise()
|
||||
}
|
||||
|
||||
if window.IsMaximised() {
|
||||
fmt.Println("Window is maximized")
|
||||
}
|
||||
|
||||
if window.IsFullscreen() {
|
||||
window.UnFullscreen()
|
||||
}
|
||||
```
|
||||
|
||||
## Window Content
|
||||
|
||||
### SetURL()
|
||||
|
||||
Navigates to a specific URL within the window.
|
||||
|
||||
```go
|
||||
func (w *Window) SetURL(url string)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `url` - URL to navigate to (can be `http://wails.localhost/` for embedded assets)
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Navigate to embedded page
|
||||
window.SetURL("http://wails.localhost/settings.html")
|
||||
|
||||
// Navigate to external URL (if allowed)
|
||||
window.SetURL("https://wails.io")
|
||||
```
|
||||
|
||||
### SetHTML()
|
||||
|
||||
Sets the window content directly from an HTML string.
|
||||
|
||||
```go
|
||||
func (w *Window) SetHTML(html string)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `html` - HTML content to display
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
html := `
|
||||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head><title>Dynamic Content</title></head>
|
||||
<body>
|
||||
<h1>Hello from Go!</h1>
|
||||
<p>This content was generated dynamically.</p>
|
||||
</body>
|
||||
</html>
|
||||
`
|
||||
window.SetHTML(html)
|
||||
```
|
||||
|
||||
**Use cases:**
|
||||
- Dynamic content generation
|
||||
- Simple windows without frontend build process
|
||||
- Error pages or splash screens
|
||||
|
||||
### Reload()
|
||||
|
||||
Reloads the current window content.
|
||||
|
||||
```go
|
||||
func (w *Window) Reload()
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Reload current page
|
||||
window.Reload()
|
||||
```
|
||||
|
||||
**Note:** Useful during development or when content needs refreshing.
|
||||
|
||||
## Window Events
|
||||
|
||||
Wails provides two methods for handling window events:
|
||||
|
||||
- **OnWindowEvent()** - Listen to window events (cannot prevent them)
|
||||
- **RegisterHook()** - Hook into window events (can prevent them by calling `event.Cancel()`)
|
||||
|
||||
### OnWindowEvent()
|
||||
|
||||
Registers a callback for window events.
|
||||
|
||||
```go
|
||||
func (w *Window) OnWindowEvent(
|
||||
eventType events.WindowEventType,
|
||||
callback func(event *WindowEvent),
|
||||
) func()
|
||||
```
|
||||
|
||||
**Returns:** Cleanup function to remove the event listener
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
import "github.com/wailsapp/wails/v3/pkg/events"
|
||||
|
||||
// Listen for window focus
|
||||
window.OnWindowEvent(events.Common.WindowFocus, func(e *application.WindowEvent) {
|
||||
app.Logger.Info("Window gained focus")
|
||||
})
|
||||
|
||||
// Listen for window lost focus
|
||||
window.OnWindowEvent(events.Common.WindowLostFocus, func(e *application.WindowEvent) {
|
||||
app.Logger.Info("Window lost focus")
|
||||
})
|
||||
|
||||
// Listen for window resize
|
||||
window.OnWindowEvent(events.Common.WindowDidResize, func(e *application.WindowEvent) {
|
||||
app.Logger.Info("Window resized")
|
||||
})
|
||||
```
|
||||
|
||||
**Common Window Events:**
|
||||
- `events.Common.WindowClosing` - Window is about to close
|
||||
- `events.Common.WindowFocus` - Window gained focus
|
||||
- `events.Common.WindowLostFocus` - Window lost focus
|
||||
- `events.Common.WindowDidMove` - Window moved
|
||||
- `events.Common.WindowDidResize` - Window resized
|
||||
- `events.Common.WindowMinimise` - Window minimized
|
||||
- `events.Common.WindowMaximise` - Window maximized
|
||||
- `events.Common.WindowFullscreen` - Window entered fullscreen
|
||||
|
||||
### RegisterHook()
|
||||
|
||||
Registers a hook for window events. Hooks run before listeners and can prevent the event by calling `event.Cancel()`.
|
||||
|
||||
```go
|
||||
func (w *Window) RegisterHook(
|
||||
eventType events.WindowEventType,
|
||||
callback func(event *WindowEvent),
|
||||
) func()
|
||||
```
|
||||
|
||||
**Returns:** Cleanup function to remove the hook
|
||||
|
||||
**Example - Prevent window close:**
|
||||
```go
|
||||
import "github.com/wailsapp/wails/v3/pkg/events"
|
||||
|
||||
window.RegisterHook(events.Common.WindowClosing, func(e *application.WindowEvent) {
|
||||
result, _ := app.QuestionDialog().
|
||||
SetTitle("Confirm Close").
|
||||
SetMessage("Are you sure you want to close this window?").
|
||||
SetButtons("Yes", "No").
|
||||
Show()
|
||||
|
||||
if result == "No" {
|
||||
e.Cancel() // Prevent window from closing
|
||||
}
|
||||
})
|
||||
```
|
||||
|
||||
**Example - Save before closing:**
|
||||
```go
|
||||
window.RegisterHook(events.Common.WindowClosing, func(e *application.WindowEvent) {
|
||||
if hasUnsavedChanges {
|
||||
result, _ := app.QuestionDialog().
|
||||
SetMessage("Save changes before closing?").
|
||||
SetButtons("Save", "Don't Save", "Cancel").
|
||||
Show()
|
||||
|
||||
switch result {
|
||||
case "Save":
|
||||
saveData()
|
||||
// Allow close
|
||||
case "Don't Save":
|
||||
// Allow close
|
||||
case "Cancel":
|
||||
e.Cancel() // Prevent close
|
||||
}
|
||||
}
|
||||
})
|
||||
```
|
||||
|
||||
### EmitEvent()
|
||||
|
||||
Emits a custom event to the window's frontend.
|
||||
|
||||
```go
|
||||
func (w *Window) EmitEvent(name string, data ...interface{})
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `name` - Event name
|
||||
- `data` - Optional data to send with the event
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Send data to specific window
|
||||
window.EmitEvent("data-updated", map[string]interface{}{
|
||||
"count": 42,
|
||||
"status": "success",
|
||||
})
|
||||
```
|
||||
|
||||
**Frontend (JavaScript):**
|
||||
```javascript
|
||||
import { On } from '@wailsio/runtime'
|
||||
|
||||
On('data-updated', (data) => {
|
||||
console.log('Count:', data.count)
|
||||
console.log('Status:', data.status)
|
||||
})
|
||||
```
|
||||
|
||||
## Other Methods
|
||||
|
||||
### SetEnabled()
|
||||
|
||||
Enables or disables user interaction with the window.
|
||||
|
||||
```go
|
||||
func (w *Window) SetEnabled(enabled bool)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Disable window during long operation
|
||||
window.SetEnabled(false)
|
||||
|
||||
// Perform operation
|
||||
performLongOperation()
|
||||
|
||||
// Re-enable window
|
||||
window.SetEnabled(true)
|
||||
```
|
||||
|
||||
### SetBackgroundColour()
|
||||
|
||||
Sets the window background color (shown before content loads).
|
||||
|
||||
```go
|
||||
func (w *Window) SetBackgroundColour(r, g, b, a uint8)
|
||||
```
|
||||
|
||||
**Parameters:**
|
||||
- `r` - Red (0-255)
|
||||
- `g` - Green (0-255)
|
||||
- `b` - Blue (0-255)
|
||||
- `a` - Alpha/opacity (0-255)
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Set white background
|
||||
window.SetBackgroundColour(255, 255, 255, 255)
|
||||
|
||||
// Set dark background
|
||||
window.SetBackgroundColour(30, 30, 30, 255)
|
||||
```
|
||||
|
||||
### SetResizable()
|
||||
|
||||
Controls whether the window can be resized by the user.
|
||||
|
||||
```go
|
||||
func (w *Window) SetResizable(resizable bool)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Make window fixed size
|
||||
window.SetResizable(false)
|
||||
```
|
||||
|
||||
### SetAlwaysOnTop()
|
||||
|
||||
Sets whether the window stays above other windows.
|
||||
|
||||
```go
|
||||
func (w *Window) SetAlwaysOnTop(alwaysOnTop bool)
|
||||
```
|
||||
|
||||
**Example:**
|
||||
```go
|
||||
// Keep window on top
|
||||
window.SetAlwaysOnTop(true)
|
||||
```
|
||||
|
||||
## Complete Example
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/wailsapp/wails/v3/pkg/application"
|
||||
"github.com/wailsapp/wails/v3/pkg/events"
|
||||
)
|
||||
|
||||
func main() {
|
||||
app := application.New(application.Options{
|
||||
Name: "Window API Demo",
|
||||
})
|
||||
|
||||
// Create window with options
|
||||
window := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
|
||||
Title: "My Application",
|
||||
Width: 1024,
|
||||
Height: 768,
|
||||
MinWidth: 800,
|
||||
MinHeight: 600,
|
||||
BackgroundColour: application.NewRGB(255, 255, 255),
|
||||
URL: "http://wails.localhost/",
|
||||
})
|
||||
|
||||
// Configure window behavior
|
||||
window.SetResizable(true)
|
||||
window.SetMinSize(800, 600)
|
||||
window.SetMaxSize(1920, 1080)
|
||||
|
||||
// Set up event hooks
|
||||
window.RegisterHook(events.Common.WindowClosing, func(e *application.WindowEvent) {
|
||||
// Confirm before closing
|
||||
result, _ := app.QuestionDialog().
|
||||
SetTitle("Confirm Close").
|
||||
SetMessage("Are you sure you want to close this window?").
|
||||
SetButtons("Yes", "No").
|
||||
Show()
|
||||
|
||||
if result == "No" {
|
||||
e.Cancel()
|
||||
}
|
||||
})
|
||||
|
||||
// Listen for window events
|
||||
window.OnWindowEvent(events.Common.WindowFocus, func(e *application.WindowEvent) {
|
||||
window.SetTitle("My Application (Active)")
|
||||
app.Logger.Info("Window gained focus")
|
||||
})
|
||||
|
||||
window.OnWindowEvent(events.Common.WindowLostFocus, func(e *application.WindowEvent) {
|
||||
window.SetTitle("My Application")
|
||||
app.Logger.Info("Window lost focus")
|
||||
})
|
||||
|
||||
// Position and show window
|
||||
window.Centre()
|
||||
window.Show()
|
||||
|
||||
app.Run()
|
||||
}
|
||||
```
|
||||
Loading…
Add table
Add a link
Reference in a new issue