start moving tab handling into toolkit/

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

tab.go

@@ -0,0 +1,40 @@
+package gui
+
+import (
+	"log"
+//	"fmt"
+
+	"github.com/andlabs/ui"
+	_ "github.com/andlabs/ui/winmanifest"
+
+)
+
+// import toolkit "git.wit.org/wit/gui/toolkit/andlabs"
+
+func (n *Node) AddTabRaw(title string, uiC ui.Control) *Node {
+	log.Println("gui.Node.AddTabRaw()")
+
+	tab := n.uiTab
+	if (tab == nil) {
+		log.Println("gui.Node.AddTabRaw() FAIL tab == nil")
+		return n
+	}
+
+	if (uiC == nil) {
+		// hbox := ui.NewHorizontalBox()
+		// hbox.SetPadded(true)
+		// uiC = hbox
+		log.Println("gui.Node.AddTabRaw() FAIL *ui.Control == nil")
+		return n
+	}
+	tab.Append(title, uiC)
+
+	/*
+	newNode := parent.makeNode(title, 555, 600 + Config.counter)
+	newNode.uiTab = tab
+	newNode.uiBox = uiC
+	// panic("gui.AddTab() after makeNode()")
+	tabSetMargined(newNode.uiTab)
+	*/
+	return n
+}