Wait sending ScreenIsLocked signal until screen lock window is mapped.

chrome/browser/chromeos/login/screen_locker.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCKER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCKER_H_
 
 #include <string>
 
 #include "base/task.h"
@@ skipping 47 matching lines @@
 
   // Close message bubble to clear error messages.
   void ClearErrors();
 
   // (Re)enable input field.
   void EnableInput();
 
   // Exit the chrome, which will sign out the current session.
   void Signout();
 
-  // Called when the screen locker is ready.
-  void ScreenLockReady();
+  // Called when the all inputs are grabbed.
+  void OnGrabInputs();
 
   // Returns the user to authenticate.
   const UserManager::User& user() const {
     return user_;
   }
 
   // Initialize ScreenLocker class. It will listen to
   // LOGIN_USER_CHANGED notification so that the screen locker accepts
   // lock event only after a user is logged in.
   static void InitClass();
@@ skipping 12 matching lines @@
 
  private:
   friend class DeleteTask<ScreenLocker>;
   friend class test::ScreenLockerTester;
 
   virtual ~ScreenLocker();
 
   // Sets the authenticator.
   void SetAuthenticator(Authenticator* authenticator);
 
+  // Called when the screen lock is ready.
+  void ScreenLockReady();
+
+  // Event handler for map-event.
+  CHROMEGTK_CALLBACK_1(ScreenLocker, void, OnMap, GdkEvent*);
+
   // The screen locker window.
   views::WidgetGtk* lock_window_;
 
   // TYPE_CHILD widget to grab the keyboard/mouse input.
   views::WidgetGtk* lock_widget_;
 
   // A view that accepts password.
   ScreenLockView* screen_lock_view_;
 
   // Logged in user.
   UserManager::User user_;
 
   // Used to authenticate the user to unlock.
   scoped_refptr<Authenticator> authenticator_;
 
   // ScreenLocker grabs all keyboard and mouse events on its
   // gdk window and never let other gdk_window to handle inputs.
   // This MouseEventRelay object is used to forward events to
   // the message bubble's gdk_window so that close button works.
   scoped_ptr<MouseEventRelay> mouse_event_relay_;
 
   // An info bubble to display login failure message.
   MessageBubble* error_info_;
 
+  // True if the screen locker's window is mapped.
+  bool mapped_;
+
+  // True if both mouse input and keyboard input are grabbed.
+  bool input_grabbed_;
+
   // Reference to the single instance of the screen locker object.
   // This is used to make sure there is only one screen locker instance.
   static ScreenLocker* screen_locker_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenLocker);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCKER_H_