apps: update to new NewWindow API

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

apps/go.mod

@@ -3,7 +3,7 @@ module gioui.org/apps
 go 1.12
 
 require (
-	gioui.org/ui v0.0.0-20190712135441-2296393471ae
+	gioui.org/ui v0.0.0-20190712184729-a3b9c7818fa7
 	github.com/google/go-github/v24 v24.0.1
 	golang.org/x/exp v0.0.0-20190627132806-fd42eb6b336f
 	golang.org/x/image v0.0.0-20190703141733-d6a02ce849c9

apps/gophers/main.go

@@ -137,14 +137,6 @@ func main() {
 		fmt.Println("The quota for anonymous GitHub API access is very low. Specify a token with -token to avoid quota errors.")
 		fmt.Println("See https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line.")
 	}
-	err := app.CreateWindow(&app.WindowOptions{
-		Width:  ui.Dp(400),
-		Height: ui.Dp(800),
-		Title:  "Gophers",
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
 	app.Main()
 }
 
@@ -169,14 +161,17 @@ func init() {
 	theme.tertText = colorMaterial(&ops, rgb(0xbbbbbb))
 	theme.brand = colorMaterial(&ops, rgb(0x62798c))
 	theme.white = colorMaterial(&ops, rgb(0xffffff))
+	w, err := app.NewWindow(&app.WindowOptions{
+		Width:  ui.Dp(400),
+		Height: ui.Dp(800),
+		Title:  "Gophers",
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
 	go func() {
-		for w := range app.Windows() {
-			w := w
-			go func() {
-				if err := newApp(w).run(); err != nil {
-					log.Fatal(err)
-				}
-			}()
+		if err := newApp(w).run(); err != nil {
+			log.Fatal(err)
 		}
 	}()
 }

apps/hello/hello.go

@@ -20,24 +20,20 @@ import (
 )
 
 func main() {
-	wopt := app.WindowOptions{Width: ui.Px(612), Height: ui.Px(792), Title: "Hello"}
-	if err := app.CreateWindow(&wopt); err != nil {
-		log.Fatal(err)
-	}
 	app.Main()
 }
 
 // On iOS and Android main will never be called, so
 // setting up the window must run in an init function.
 func init() {
+	wopt := app.WindowOptions{Width: ui.Dp(800), Height: ui.Dp(600), Title: "Hello"}
+	w, err := app.NewWindow(&wopt)
+	if err != nil {
+		log.Fatal(err)
+	}
 	go func() {
-		for w := range app.Windows() {
-			w := w
-			go func() {
-				if err := loop(w); err != nil {
-					log.Fatal(err)
-				}
-			}()
+		if err := loop(w); err != nil {
+			log.Fatal(err)
 		}
 	}()
 }