Introduced @show and @hide to controller which are executed on show/hide of controller.

app/assets/javascripts/app/controllers/agent_ticket_create.js.coffee

@@ -104,7 +104,7 @@ class App.TicketCreate extends App.Controller
   url: =>
     '#ticket/create/id/' + @id
 
-  activate: =>
+  show: =>
     @navupdate '#'
 
   changed: =>

app/assets/javascripts/app/controllers/organization_zoom.js.coffee

@@ -31,7 +31,7 @@ class App.OrganizationZoom extends App.Controller
   url: =>
     '#organization/zoom/' + @organization_id
 
-  activate: =>
+  show: =>
     App.OnlineNotification.seen( 'Organization', @organization_id )
     @navupdate '#'
 

app/assets/javascripts/app/controllers/ticket_zoom.js.coffee

@@ -40,9 +40,6 @@ class App.TicketZoom extends App.Controller
         @delay( update, 1800, 'ticket-zoom-' + @ticket_id )
     )
 
-    @bind "task:hide", @onHide
-    @bind "task:show", @onShow
-
   meta: =>
     meta =
       url:        @url()
@@ -58,9 +55,15 @@ class App.TicketZoom extends App.Controller
   url: =>
     '#ticket/zoom/' + @ticket_id
 
-  activate: =>
+  show: =>
     App.OnlineNotification.seen( 'Ticket', @ticket_id )
     @navupdate '#'
+    if @scrollHeader
+      @scrollHeader.continue()
+
+  hide: =>
+    if @scrollHeader
+      @scrollHeader.pause()
 
   changed: =>
     formCurrent = @formParam( @el.find('.edit') )
@@ -407,14 +410,6 @@ class App.TicketZoom extends App.Controller
         forceHeight: false
         holder: @main.get(0)
 
-  onShow: =>
-    if @scrollHeader
-      @scrollHeader.continue()
-
-  onHide: =>
-    if @scrollHeader
-      @scrollHeader.pause()
-
   autosaveStop: =>
     @autosaveLast = {}
     @clearInterval( 'autosave' )

app/assets/javascripts/app/controllers/user_zoom.js.coffee

@@ -30,7 +30,7 @@ class App.UserZoom extends App.Controller
   url: =>
     '#user/zoom/' + @user_id
 
-  activate: =>
+  show: =>
     App.OnlineNotification.seen( 'User', @user_id )
     @navupdate '#'
 

app/assets/javascripts/app/lib/app_post/task_manager.js.coffee

@@ -206,12 +206,8 @@ class _taskManagerSingleton extends App.Controller
 
     # return if controller is already started
     if @workersStarted[key]
-
+      if !to_not_show
-      # activate existing controller
+        @showController( key, params_app )
-      worker = @worker( key )
-      if worker && worker.activate && !to_not_show
-        worker.activate(params_app)
-        App.Event.trigger('ui:rerender:task')
       return
 
     @workersStarted[key] = true
@@ -222,10 +218,22 @@ class _taskManagerSingleton extends App.Controller
 
     # activate controller
     if !to_not_show
-      a.activate(params_app)
+      @showController( key, params_app )
 
     return a
 
+  showController: ( thisKey, params_app ) =>
+    for key of @workersStarted
+      controller = @workers[ key ]
+      if controller
+        if key is thisKey
+          if controller.show
+            controller.show(params_app)
+            App.Event.trigger('ui:rerender:task')
+        else
+          if controller.hide
+            controller.hide()
+
   get: ( key ) =>
     for task in @allTasks
       if task.key is key