[v2]Abnormal behavior when restoring a minimized Wails window on Windows. #4109
Description
Description
After maximizing the window and minimizing it, waking it up through the singleton does not restore maximization. @leaanthony
To Reproduce
Create a single-instance maximized window.
func main() {
// Create an instance of the app structure
app := NewApp()
// Create application with options
err := wails.Run(&options.App{
Title: "wailstest",
WindowStartState: options.Maximised,
AssetServer: &assetserver.Options{
Assets: assets,
},
BackgroundColour: &options.RGBA{R: 27, G: 38, B: 54, A: 1},
OnStartup: app.startup,
SingleInstanceLock: &options.SingleInstanceLock{
UniqueId: "UNIQUE_ID",
OnSecondInstanceLaunch: app.OnSecondInstanceLaunch,
},
Bind: []interface{}{
app,
},
})
if err != nil {
println("Error:", err.Error())
}
}
// App struct
type App struct {
ctx context.Context
}
// NewApp creates a new App application struct
func NewApp() *App {
return &App{}
}
func (a *App) OnSecondInstanceLaunch(secondInstanceData options.SecondInstanceData) {
if runtime.WindowIsMinimised(a.ctx) {
runtime.WindowUnminimise(a.ctx)
}
runtime.Show(a.ctx)
go runtime.EventsEmit(a.ctx, "launchArgs", secondInstanceData.Args)
}
// startup is called when the app starts. The context is saved
// so we can call the runtime methods
func (a *App) startup(ctx context.Context) {
a.ctx = ctx
}
// Greet returns a greeting for the given name
func (a *App) Greet(name string) string {
return fmt.Sprintf("Hello %s, It's show time!", name)
}
Expected behaviour
The window should be restored to maximized when awakened by the singleton.
Screenshots
20250303-190322.mp4
Attempted Fixes
func (fm *Form) Restore() {
// SC_RESTORE param for WM_SYSCOMMAND to restore app if it is minimized
const SC_RESTORE = 0xF120
// restore the minimized window, if it is
w32.SendMessage(
fm.hwnd,
w32.WM_SYSCOMMAND,
SC_RESTORE, // <- the window has already been restored here.
0,
)
//w32.ShowWindow(fm.hwnd, w32.SW_RESTORE)
w32.ShowWindow(fm.hwnd, w32.SW_SHOW) // <- use this
}
System Details
Wails Doctor
# Wails
Version | v2.9.2
# System
┌─────────────────────────────────────────────────────────────────────────────────────────┐
| OS | Windows 10 Enterprise |
| Version | 2009 (Build: 22631) |
| ID | 23H2 |
| Go Version | go1.22.9 |
| Platform | windows |
| Architecture | amd64 |
| CPU | 13th Gen Intel(R) Core(TM) i9-13900H |
| GPU 1 | NVIDIA GeForce RTX 3050 4GB Laptop GPU (NVIDIA) - Driver: 31.0.15.2799 |
| GPU 2 | Intel(R) Iris(R) Xe Graphics (Intel Corporation) - Driver: 31.0.101.4575 |
| Memory | 32GB |
└─────────────────────────────────────────────────────────────────────────────────────────┘
# Diagnosis
Optional package(s) installation details:
- upx : Available at https://upx.github.io/
- nsis : More info at https://wails.io/docs/guides/windows-installer/
SUCCESS Your system is ready for Wails development!
♥ If Wails is useful to you or your company, please consider sponsoring the project:
https://github.com/sponsors/leaanthonyAdditional context
No response