Draw only visible windows

windowmanager.go

@@ -73,7 +73,7 @@ func (wm *WindowManager) Draw(screen tcell.Screen) {
 
 	var hasFullScreen bool
 	for _, w := range wm.windows {
-		if !w.fullscreen {
+		if !w.fullscreen || !w.IsVisible() {
 			continue
 		}
 
@@ -88,9 +88,11 @@ func (wm *WindowManager) Draw(screen tcell.Screen) {
 	}
 
 	for _, w := range wm.windows {
-		w.SetBorder(true)
-		w.SetRect(x+w.x, x+w.y, w.width, w.height)
-		w.Draw(screen)
+		if w.IsVisible() {
+			w.SetBorder(true)
+			w.SetRect(x+w.x, x+w.y, w.width, w.height)
+			w.Draw(screen)
+		}
 	}
 }