apps: use DrawEvent.Size instead of Window.Size

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 v0.0.0-20190713112858-112368a2e39a
+	gioui.org/ui v0.0.0-20190714110834-6e97d65af145
 	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

@@ -228,7 +228,7 @@ func (a *App) run() error {
 			case app.DrawEvent:
 				ops.Reset()
 				a.cfg = e.Config
-				cs := layout.ExactConstraints(a.w.Size())
+				cs := layout.ExactConstraints(e.Size)
 				a.Layout(ops, cs)
 				if a.profiling {
 					a.layoutTimings(ops, cs)

apps/hello/hello.go

@@ -52,7 +52,7 @@ func loop(w *app.Window) error {
 			return e.Err
 		case app.DrawEvent:
 			cfg = e.Config
-			cs := layout.ExactConstraints(w.Size())
+			cs := layout.ExactConstraints(e.Size)
 			ops.Reset()
 			ops.Begin()
 			draw.ColorOp{Color: maroon}.Add(ops)