V.0.1.0 Codename Threadbare

Development branch for milestone v.0.1.0 Codename Threadbare.

Please keep using feature branches and merge them against v.0.1.0-codename-threadbare.

cmd/gosdn-tview/app/app.go

@@ -5,8 +5,10 @@ import "github.com/rivo/tview"
 type view interface {
 	GetContent() tview.Primitive
 }
+
 type App struct {
-	app *tview.Application
+	app   *tview.Application
+	pages *tview.Pages
 }
 
 func NewApp() *App {
@@ -16,8 +18,19 @@ func NewApp() *App {
 	return a
 }
 
-func (a *App) SetView(v view) {
-	a.app.SetRoot(v.GetContent(), true)
+func (a *App) SetRoot(v view) {
+	a.pages = v.GetContent().(*tview.Pages)
+	a.app.SetRoot(a.pages, true)
+}
+
+func (a *App) SwitchPage(s string) {
+	if a.pages.HasPage(s) {
+		a.pages.SwitchToPage(s)
+	}
+}
+
+func (a *App) AddPage(name string, p view) {
+	a.pages.AddPage(name, p.GetContent(), true, false)
 }
 
 func (a *App) Run() error {