diff --git a/src/github.com/dkolbly/wl/common.go b/src/github.com/dkolbly/wl/common.go
index 308014d3..e741da3a 100644
--- a/src/github.com/dkolbly/wl/common.go
+++ b/src/github.com/dkolbly/wl/common.go
@@ -1,8 +1,6 @@
 package wl
 
-import (
-	"context"
-)
+import "context"
 
 type ProxyId uint32
 
diff --git a/src/github.com/dkolbly/wl/context.go b/src/github.com/dkolbly/wl/context.go
index 3ab3852c..c02234d0 100644
--- a/src/github.com/dkolbly/wl/context.go
+++ b/src/github.com/dkolbly/wl/context.go
@@ -27,10 +27,15 @@ type Context struct {
 func (ctx *Context) Register(proxy Proxy) {
 	ctx.mu.Lock()
 	defer ctx.mu.Unlock()
-	ctx.currentId += 1
-	proxy.SetId(ctx.currentId)
+	pid := proxy.Id()
 	proxy.SetContext(ctx)
-	ctx.objects[ctx.currentId] = proxy
+	if pid > 0 {
+		ctx.objects[pid] = proxy
+	} else {
+		ctx.currentId += 1
+		proxy.SetId(ctx.currentId)
+		ctx.objects[ctx.currentId] = proxy
+	}
 }
 
 func (ctx *Context) lookupProxy(id ProxyId) Proxy {
diff --git a/src/ibus-bamboo/client.go b/src/ibus-bamboo/client.go
index e648d3f5..481d8f5b 100644
--- a/src/ibus-bamboo/client.go
+++ b/src/ibus-bamboo/client.go
@@ -7,6 +7,7 @@
 package main
 
 import (
+	"context"
 	"sync"
 
 	wl "github.com/dkolbly/wl"
@@ -67,12 +68,13 @@ func (p *ZwlrForeignToplevelManagerV1) RemoveFinishedHandler(h ZwlrForeignToplev
 	}
 }
 
-func (p *ZwlrForeignToplevelManagerV1) Dispatch(event *wl.Event) {
+func (p *ZwlrForeignToplevelManagerV1) Dispatch(c context.Context, event *wl.Event) {
 	switch event.Opcode {
 	case 0:
 		if len(p.toplevelHandlers) > 0 {
 			ev := ZwlrForeignToplevelManagerV1ToplevelEvent{}
-			ev.Toplevel = event.Proxy(p.Context()).(*ZwlrForeignToplevelHandleV1)
+			// ev.Toplevel = event.Proxy(p.Context()).(*ZwlrForeignToplevelHandleV1)
+			ev.Toplevel = NewZwlrForeignToplevelHandleV1(p.Context(), wl.ProxyId(event.Uint32()))
 			p.mu.RLock()
 			for _, h := range p.toplevelHandlers {
 				h.HandleZwlrForeignToplevelManagerV1Toplevel(ev)
@@ -339,7 +341,7 @@ func (p *ZwlrForeignToplevelHandleV1) RemoveParentHandler(h ZwlrForeignToplevelH
 	}
 }
 
-func (p *ZwlrForeignToplevelHandleV1) Dispatch(event *wl.Event) {
+func (p *ZwlrForeignToplevelHandleV1) Dispatch(c context.Context, event *wl.Event) {
 	switch event.Opcode {
 	case 0:
 		if len(p.titleHandlers) > 0 {
@@ -435,8 +437,9 @@ type ZwlrForeignToplevelHandleV1 struct {
 	parentHandlers      []ZwlrForeignToplevelHandleV1ParentHandler
 }
 
-func NewZwlrForeignToplevelHandleV1(ctx *wl.Context) *ZwlrForeignToplevelHandleV1 {
+func NewZwlrForeignToplevelHandleV1(ctx *wl.Context, pid wl.ProxyId) *ZwlrForeignToplevelHandleV1 {
 	ret := new(ZwlrForeignToplevelHandleV1)
+	ret.SetId(pid)
 	ctx.Register(ret)
 	return ret
 }
diff --git a/src/ibus-bamboo/version.go b/src/ibus-bamboo/version.go
index 2ef87c97..5c7a42e3 100644
--- a/src/ibus-bamboo/version.go
+++ b/src/ibus-bamboo/version.go
@@ -19,4 +19,4 @@
 
 package main
 
-const Version = "v0.6.9"
+const Version = "v0.7.0"
diff --git a/src/ibus-bamboo/wl_introspector.go b/src/ibus-bamboo/wl_introspector.go
index de64d02e..99e25912 100644
--- a/src/ibus-bamboo/wl_introspector.go
+++ b/src/ibus-bamboo/wl_introspector.go
@@ -13,38 +13,65 @@ func wlGetFocusWindowClass() error {
 	if err != nil {
 		return fmt.Errorf("Connect to Wayland server failed %s", err)
 	}
+	appIdChan := make(chan string, 10)
+	err = registerGlobals(display, appIdChan)
+	if err != nil {
+		return err
+	}
+	for {
+		select {
+		case wlAppId = <-appIdChan:
+			fmt.Println("wlAppId = ", wlAppId)
+		case display.Context().Dispatch() <- struct{}{}:
+		}
+	}
+	display.Context().Close()
+	return nil
+}
+
+func registerGlobals(display *wl.Display, appIdChan chan string) error {
 	registry, err := display.GetRegistry()
 	if err != nil {
 		return fmt.Errorf("Display.GetRegistry failed : %s", err)
 	}
-	_, err = display.Sync()
+
+	callback, err := display.Sync()
 	if err != nil {
 		return fmt.Errorf("Display.Sync failed %s", err)
 	}
-	appIdChan := make(chan string, 10)
+
 	rgeChan := make(chan wl.RegistryGlobalEvent)
 	rgeHandler := registrar{rgeChan}
 	registry.AddGlobalHandler(rgeHandler)
+
+	cdeChan := make(chan wl.CallbackDoneEvent)
+	cdeHandler := doner{cdeChan}
+
+	callback.AddDoneHandler(cdeHandler)
+	adHandler := appIdHandler{appIdChan, false}
+loop:
 	for {
 		select {
 		case ev := <-rgeChan:
-			if err := registerInterface(registry, ev, display.Context(), appIdChan); err != nil {
+			if err := registerInterface(registry, ev, display.Context(), &adHandler); err != nil {
 				return err
 			}
-		case wlAppId = <-appIdChan:
 		case display.Context().Dispatch() <- struct{}{}:
+		case <-cdeChan:
+			break loop
 		}
 	}
+
 	registry.RemoveGlobalHandler(rgeHandler)
-	display.Context().Close()
+	callback.RemoveDoneHandler(cdeHandler)
 	return nil
 }
 
-func registerInterface(registry *wl.Registry, ev wl.RegistryGlobalEvent, ctx *wl.Context, appIdChan chan string) error {
+func registerInterface(registry *wl.Registry, ev wl.RegistryGlobalEvent, ctx *wl.Context, adHandler *appIdHandler) error {
 	switch ev.Interface {
 	case "zwlr_foreign_toplevel_manager_v1":
 		manager := NewZwlrForeignToplevelManagerV1(ctx)
-		manager.AddToplevelHandler(toplevelHandlers{appIdChan})
+		manager.AddToplevelHandler(toplevelHandlers{adHandler})
 		err := registry.Bind(ev.Name, ev.Interface, ev.Version, manager)
 		if err != nil {
 			return fmt.Errorf("Unable to bind ZwlrForeignToplevelManagerV1 interface: %s", err)
@@ -53,6 +80,14 @@ func registerInterface(registry *wl.Registry, ev wl.RegistryGlobalEvent, ctx *wl
 	return nil
 }
 
+type doner struct {
+	ch chan wl.CallbackDoneEvent
+}
+
+func (d doner) HandleCallbackDone(ev wl.CallbackDoneEvent) {
+	d.ch <- ev
+}
+
 type registrar struct {
 	ch chan wl.RegistryGlobalEvent
 }
@@ -61,19 +96,28 @@ func (r registrar) HandleRegistryGlobal(ev wl.RegistryGlobalEvent) {
 	r.ch <- ev
 }
 type toplevelHandlers struct {
-	ch chan string
+	adHandler *appIdHandler
 }
 
 func (t toplevelHandlers) HandleZwlrForeignToplevelManagerV1Toplevel(ev ZwlrForeignToplevelManagerV1ToplevelEvent) {
-	ev.Toplevel.AddAppIdHandler(appIdHandler{t.ch})
+	ev.Toplevel.AddAppIdHandler(t.adHandler)
+	ev.Toplevel.AddDoneHandler(t.adHandler)
 }
 
 type appIdHandler struct {
 	ch chan string
+	isAppIdUpdated bool
 }
 
-func (a appIdHandler) HandleZwlrForeignToplevelHandleV1AppId(ev ZwlrForeignToplevelHandleV1AppIdEvent) {
-	print(ev.AppId)
+func (a *appIdHandler) HandleZwlrForeignToplevelHandleV1AppId(ev ZwlrForeignToplevelHandleV1AppIdEvent) {
 	a.ch <- ev.AppId
+	a.isAppIdUpdated = true
+}
+
+func (a *appIdHandler) HandleZwlrForeignToplevelHandleV1Done(ev ZwlrForeignToplevelHandleV1DoneEvent) {
+	if !a.isAppIdUpdated {
+		a.ch <- ""
+	}
+	a.isAppIdUpdated = false
 }