make it possible to switch between panels

cmd/manage/main.go

@@ -10,6 +10,11 @@ import (
 	"github.com/kelseyhightower/envconfig"
 )
 
+const (
+	IN_MENU = iota
+	IN_BOOK
+)
+
 func main() {
 	var c config.Config
 	err := envconfig.Process("library", &c)
@@ -28,21 +33,28 @@ func main() {
 	l := ui.NewList([]string{"foo", "bar", "baz"}, 0)
 	menu := ui.NewBox(
 		"library",
-		[]string{"(e)dit", "(q)uit"},
+		[]string{"(q)uit"},
 		ui.Contents{{
 			Offsets:   ui.Offsets{Top: 1, Left: 2, Bottom: -2, Right: -2},
 			Container: l,
 		}},
 	)
+	book := ui.NewBookDetails()
 	activeBook := ui.NewBox(
 		"book",
 		[]string{"test"},
-		ui.Contents{},
+		ui.Contents{{
+			Offsets:   ui.Offsets{Top: 1, Left: 2, Bottom: -2, Right: -2},
+			Container: book,
+		}},
 	)
 
 	container := ui.NewContainer(
-		ui.Contents{{Container: menu}, {Container: activeBook}},
-		ui.LayoutHorizontalEven,
+		ui.Contents{
+			{Container: menu, Offsets: ui.Offsets{Percent: 1}},
+			{Container: activeBook, Offsets: ui.Offsets{Percent: 2}},
+		},
+		ui.LayoutHorizontalPercent,
 	)
 
 	// init
@@ -52,6 +64,8 @@ func main() {
 	container.Draw(screen)
 	screen.Sync()
 
+	state := IN_MENU
+
 	// UI loop
 	for {
 		e := screen.PollEvent()
@@ -59,16 +73,25 @@ func main() {
 		case *tcell.EventError:
 			screen.Beep()
 		case *tcell.EventKey: // input handling
-			if v.Key() == tcell.KeyUp && l.Selected() > 0 {
-				l.SetSelected(l.Selected() - 1)
-			}
-			if v.Key() == tcell.KeyDown && l.Selected() < len(l.ListMembers())-1 {
-				l.SetSelected(l.Selected() + 1)
-			}
-			if v.Rune() == 'q' {
-				screen.Fini()
-				fmt.Printf("Thank you for playing Wing Commander!\n\n")
-				return
+			if state == IN_MENU {
+				if v.Key() == tcell.KeyUp && l.Selected() > 0 {
+					l.SetSelected(l.Selected() - 1)
+				}
+				if v.Key() == tcell.KeyDown && l.Selected() < len(l.ListMembers())-1 {
+					l.SetSelected(l.Selected() + 1)
+				}
+				if v.Rune() == 'q' {
+					screen.Fini()
+					fmt.Printf("Thank you for playing Wing Commander!\n\n")
+					return
+				}
+				if v.Key() == tcell.KeyRight {
+					state = IN_BOOK
+				}
+			} else if state == IN_BOOK {
+				if v.Key() == tcell.KeyLeft {
+					state = IN_MENU
+				}
 			}
 			screen.Clear()
 			container.Draw(screen)