apps: remove use of app.Window.IsAlive

Signed-off-by: Elias Naur <mail@eliasnaur.com>

apps/gophers/main.go

@@ -185,7 +185,7 @@ func (a *App) run() error {
 	a.w.Profiling = *stats
 	ops := new(ui.Ops)
 	var lastMallocs uint64
-	for a.w.IsAlive() {
+	for {
 		select {
 		case users := <-a.updateUsers:
 			a.users = users
@@ -219,6 +219,9 @@ func (a *App) run() error {
 						a.ctxCancel = nil
 					}
 				}
+				if e.Stage == app.StageDead {
+					return a.w.Err()
+				}
 			case *app.CommandEvent:
 				switch e.Type {
 				case app.CommandBack:
@@ -253,7 +256,6 @@ func (a *App) run() error {
 			}
 		}
 	}
-	return a.w.Err()
 }
 
 func newApp(w *app.Window) *App {

apps/hello/hello.go

@@ -32,12 +32,16 @@ func main() {
 func init() {
 	go func() {
 		for w := range app.Windows() {
-			go loop(w)
+			go func() {
+				if err := loop(w); err != nil {
+					log.Fatal(err)
+				}
+			}()
 		}
 	}()
 }
 
-func loop(w *app.Window) {
+func loop(w *app.Window) error {
 	regular, err := sfnt.Parse(goregular.TTF)
 	if err != nil {
 		panic("failed to load font")
@@ -48,9 +52,13 @@ func loop(w *app.Window) {
 	face := faces.For(regular, ui.Sp(72))
 	message := "Hello, Gio"
 	ops := new(ui.Ops)
-	for w.IsAlive() {
+	for {
 		e := <-w.Events()
 		switch e := e.(type) {
+		case app.StageEvent:
+			if e.Stage == app.StageDead {
+				return w.Err()
+			}
 		case app.DrawEvent:
 			cfg = e.Config
 			cs := layout.ExactConstraints(w.Size())
@@ -63,7 +71,4 @@ func loop(w *app.Window) {
 			faces.Frame()
 		}
 	}
-	if err := w.Err(); err != nil {
-		log.Fatal(err)
-	}
 }