EXAMPLE: correctly add a tab to the example app

Signed-off-by: Jeff Carr <jcarr@wit.com>

gui-example/main.go

@@ -26,7 +26,8 @@ func main() {
 }
 
 func initGUI() {
-	gui.NewWindow("jcarr start", 640, 480)
+	n := gui.NewWindow("jcarr start", 640, 480)
+	n.AddDemoTab("up the rabbit hole")
 }
 
 func watchGUI() {
@@ -35,7 +36,7 @@ func watchGUI() {
 		log.Println("Waiting for customExit()", i)
 		i += 1
 		time.Sleep(1 * time.Second)
-		if i == 2 {
+		if i == 4 {
 			log.Println("Sending ExampleWindow to gui.Queue()")
 			gui.Queue(gui.DebugWindow)
 		}

gui.go

@@ -24,6 +24,8 @@ func init() {
 
 	Config.counter = 0
 	Config.prefix = "jwc"
+	Config.DebugNode = false
+	Config.DebugTabs = false
 }
 
 func GuiInit() {

structs.go

@@ -23,6 +23,8 @@ type GuiConfig struct {
 	Width      int
 	Height     int
 	Debug      bool
+	DebugNode  bool
+	DebugTabs  bool
 	DebugTable bool
 	Exit       func(*GuiWindow)
 

window-debug.go

@@ -356,15 +356,11 @@ func addButton(box *ui.Box, name string) *ui.Button {
 	return button
 }
 
-func (n *Node) AddDemoTab(title string) {
-	newNode := n.AddTab(title, makeWindowTemplate())
-	newNode.Dump()
-	tabSetMargined(newNode.uiTab)
-}
-
 func (n *Node) AddDebugTab(title string) {
 	newNode := n.AddTab(title, makeWindowDebug())
-	newNode.Dump()
+	if (Config.DebugNode) {
+		newNode.Dump()
+	}
 	tabSetMargined(newNode.uiTab)
 }
 
@@ -372,10 +368,14 @@ func (n *Node) AddDebugTab(title string) {
 //
 // TODO: do proper tab tracking (will be complicated). low priority
 func tabSetMargined(tab *ui.Tab) {
-	log.Println("tabSetMargined() IGNORE THIS")
+	if (Config.DebugTabs) {
+		log.Println("tabSetMargined() IGNORE THIS")
+	}
 	c := tab.NumPages()
 	for i := 0; i < c; i++ {
-		log.Println("tabSetMargined() i =", i)
+		if (Config.DebugTabs) {
+			log.Println("tabSetMargined() i =", i)
+		}
 		tab.SetMargined(i, true)
 	}
 }

window-template.go

@@ -4,6 +4,14 @@ import "log"
 import "github.com/andlabs/ui"
 import _ "github.com/andlabs/ui/winmanifest"
 
+func (n *Node) AddDemoTab(title string) {
+	newNode := n.AddTab(title, makeWindowTemplate())
+	if (Config.DebugNode) {
+		newNode.Dump()
+	}
+	tabSetMargined(newNode.uiTab)
+}
+
 func makeWindowTemplate() ui.Control {
 	hbox := ui.NewHorizontalBox()
 	hbox.SetPadded(true)