Allow left, center, and right alignment of text

cmd/rpi/main.go

@@ -16,7 +16,7 @@ import (
 )
 
 const (
-	RefreshRateHz = 1
+	RefreshRateHz = 120
 	MempoolURL    = "mempool.space"
 )
 
@@ -29,10 +29,10 @@ func main() {
 	c := rgbmatrix.NewCanvas(m)
 
 	d := display.New(c,
-		display.NewSlot(9, 5, 4, 0, 0),
-		display.NewSlot(5, 5, 4, 44, 0),
-		display.NewSlot(7, 13, 8, 5, 9),
-		display.NewSlot(12, 5, 4, 7, 27),
+		display.NewSlot(display.Left, 9, 5, 4, 0, 0),
+		display.NewSlot(display.Right, 5, 5, 4, 44, 0),
+		display.NewSlot(display.Center, 8, 13, 8, 0, 9),
+		display.NewSlot(display.Center, 16, 5, 4, 0, 27),
 	)
 
 	ctx, cancel := context.WithCancel(context.Background())
@@ -85,7 +85,6 @@ func main() {
 		for {
 			select {
 			case m := <-msgs:
-				fmt.Printf("%+v\n", m)
 				if m.Fees != nil {
 					feesMutex.Lock()
 					fees = *m.Fees