EXAMPLE: provide a clean example

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

.gitignore

@@ -1 +1,2 @@
 *.swp
+gui-example/gui-example

gui-example/Makefile

@@ -0,0 +1,5 @@
+run: build
+	~/go/bin/gui-example
+
+build:
+	GO111MODULE="off" go install

gui-example/main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"log"
+	"os"
+	"time"
+
+	"git.wit.org/wit/gui"
+)
+
+func customExit(gw *gui.GuiWindow) {
+	log.Println("Should Exit Here")
+	os.Exit(0)
+}
+
+func main() {
+	log.Println("starting my Control Panel")
+
+	gui.Config.Width = 1000
+	gui.Config.Height = 400
+	gui.Config.Exit = customExit
+
+	go gui.Main(initGUI)
+
+	watchGUI()
+}
+
+func initGUI() {
+	gui.NewWindow("jcarr start", 640, 480)
+}
+
+func watchGUI() {
+	var i = 1
+	for {
+		log.Println("Waiting for customExit()", i)
+		i += 1
+		time.Sleep(time.Second)
+		if i == 3 {
+			log.Println("Sending ExampleWindow to gui.Queue()")
+			gui.Queue(gui.ExampleWindow)
+		}
+	}
+}

main.go

@@ -32,6 +32,7 @@ func ExampleWindow() {
 	window := box.Window
 	log.Println("box =", box)
 	log.Println("window =", window)
+	box.AddDebugTab("jcarr Debug")
 
 	window.UiWindow.Show()
 }