layout: add background color option

1 files changed, 9 insertions, 4 deletions

diff --git a/test/region.go b/test/region.go
index afd739e..0b99a3a 100644
--- a/test/region.go
+++ b/test/region.go
@@ -11,6 +11,10 @@ import (
 	"github.com/faiface/mainthread"
 )
 
+var (
+	bg = gui.HexToColor("#999999") // background color
+)
+
 func main() {
 	mainthread.Run(run)
 }
@@ -24,9 +28,10 @@ func run() {
 	mux, env := gui.NewMux(w)
 
 	// Create region in bottom-right quadrant of window
-	region := layout.NewRegion(mux.MakeEnv(), func(r image.Rectangle) image.Rectangle {
+	resize := func(r image.Rectangle) image.Rectangle {
 		return image.Rect(r.Min.X+r.Dx()/2, r.Min.Y+r.Dy()/2, r.Max.X, r.Max.Y)
-	})
+	}
+	region := layout.NewRegion(mux.MakeEnv(), resize, layout.Background(bg))
 	go blinker(region)
 
 	for event := range env.Events() {
@@ -64,9 +69,9 @@ func blinker(env gui.Env) {
 				go func() {
 					for i := 0; i < 3; i++ {
 						env.Draw() <- redraw(false)
-						time.Sleep(time.Second / 3)
+						time.Sleep(time.Second / 6)
 						env.Draw() <- redraw(true)
-						time.Sleep(time.Second / 3)
+						time.Sleep(time.Second / 6)
 					}
 				}()
 			}