Fixes #39. Unfocused tab problem solved

system/widget.go

@@ -20,7 +20,7 @@ type Widget struct {
 
 func NewWidget(builtAt, version string) *Widget {
 	widget := Widget{
-		TextWidget: wtf.NewTextWidget(" System ", "system", false),
+		TextWidget: wtf.NewTextWidget(" Build ", "system", false),
 		BuiltAt:    builtAt,
 		Version:    version,
 	}

wtf.go

@@ -201,7 +201,7 @@ func main() {
 
 	FocusTracker = wtf.FocusTracker{
 		App:     app,
-		Idx:     0,
+		Idx:     -1,
 		Widgets: Widgets,
 	}
 

wtf/focus_tracker.go

@@ -17,10 +17,12 @@ type FocusTracker struct {
 // Next sets the focus on the next widget in the widget list. If the current widget is
 // the last widget, sets focus on the first widget.
 func (tracker *FocusTracker) Next() {
+	if tracker.widgetHasFocus() {
 		tracker.blur(tracker.Idx)
 		tracker.increment()
 		tracker.focus(tracker.Idx)
 	}
+}
 
 // None removes focus from the currently-focused widget.
 func (tracker *FocusTracker) None() {
@@ -30,10 +32,12 @@ func (tracker *FocusTracker) None() {
 // Prev sets the focus on the previous widget in the widget list. If the current widget is
 // the last widget, sets focus on the last widget.
 func (tracker *FocusTracker) Prev() {
+	if tracker.widgetHasFocus() {
 		tracker.blur(tracker.Idx)
 		tracker.decrement()
 		tracker.focus(tracker.Idx)
 	}
+}
 
 func (tracker *FocusTracker) Refocus() {
 	tracker.focus(tracker.Idx)
@@ -104,6 +108,10 @@ func (tracker *FocusTracker) increment() {
 // widgetHasFocus returns true if one of the widgets currently has the app's focus,
 // false if none of them do (ie: perhaps a modal dialog currently has it instead)
 func (tracker *FocusTracker) widgetHasFocus() bool {
+	if tracker.Idx < 0 {
+		return true
+	}
+
 	for _, widget := range tracker.Widgets {
 		if widget.TextView() == tracker.App.GetFocus() {
 			return true