add Caller in keyboard ,add OnKdbReturnBackCb on Page interface

sysgo/UI/confirm_page.go

@@ -1,7 +1,7 @@
 package UI
 
 import (
-	
+	//"fmt"
 	"github.com/veandco/go-sdl2/ttf"
 	
 //	"github.com/cuu/gogame/surface"
@@ -144,7 +144,7 @@ func (self *ConfirmPage) Init() {
 
 
 func (self *ConfirmPage) KeyDown( ev *event.Event ) {
-
+ 
 	if ev.Data["Key"] == CurKeys["A"] || ev.Data["Key"] == CurKeys["Menu"] {
 		self.ReturnToUpLevelPage()
 		self.Screen.Draw()

sysgo/UI/keyboard.go

@@ -89,7 +89,7 @@ type Keyboard struct {
 	Textarea *Textarea
 	Selector *KeyboardSelector
 
-	
+	Caller PageInterface
 }
 
 func NewKeyboard() *Keyboard {
@@ -466,6 +466,9 @@ func (self *Keyboard) KeyDown( ev *event.Event) {
 		fmt.Println(strings.Join(self.Textarea.MyWords,""))
 		self.ReturnToUpLevelPage()
 		self.Screen.SwapAndShow()
+    if self.Caller != nil {
+      self.Caller.OnKbdReturnBackCb()
+    }
 		//Uplevel/Parent page invoke OnReturnBackCb,eg: ConfigWireless
 		
 	}

sysgo/UI/page.go

@@ -207,6 +207,7 @@ type PageInterface interface {
 	
 	OnLoadCb()
 	OnReturnBackCb()
+  OnKbdReturnBackCb()
 	OnExitCb()
 
 //	IconClick()
@@ -921,6 +922,10 @@ func (self *Page) OnLoadCb() {
 	
 }
 
+func (self *Page) OnKbdReturnBackCb() {
+	
+}
+
 func (self *Page) OnReturnBackCb() {
 	
 }