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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_
      6 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_
      7 
      8 #include <string>
      9 
     10 namespace chromeos {
     11 
     12 class ErrorScreen;
     13 class WizardScreen;
     14 
     15 // Interface that handles notifications received from any of login wizard
     16 // screens.
     17 class ScreenObserver {
     18  public:
     19   // Each login screen or a view shown within login wizard view is itself a
     20   // state. Upon exit each view returns one of the results by calling
     21   // OnExit() method. Depending on the result and the current view or state
     22   // login wizard decides what is the next view to show. There must be an
     23   // exit code for each way to exit the screen for each screen.
     24   enum ExitCodes {
     25     // "Continue" was pressed on network screen and network is online.
     26     NETWORK_CONNECTED,
     27     // Connection failed while trying to load a WebPageScreen.
     28     CONNECTION_FAILED,
     29     UPDATE_INSTALLED,
     30     UPDATE_NOUPDATE,
     31     UPDATE_ERROR_CHECKING_FOR_UPDATE,
     32     UPDATE_ERROR_UPDATING,
     33     USER_IMAGE_SELECTED,
     34     EULA_ACCEPTED,
     35     EULA_BACK,
     36     ENTERPRISE_ENROLLMENT_COMPLETED,
     37     ENTERPRISE_AUTO_MAGIC_ENROLLMENT_COMPLETED,
     38     RESET_CANCELED,
     39     KIOSK_AUTOLAUNCH_CANCELED,
     40     KIOSK_AUTOLAUNCH_CONFIRMED,
     41     KIOSK_ENABLE_COMPLETED,
     42     TERMS_OF_SERVICE_DECLINED,
     43     TERMS_OF_SERVICE_ACCEPTED,
     44     WRONG_HWID_WARNING_SKIPPED,
     45     EXIT_CODES_COUNT  // not a real code, must be the last
     46   };
     47 
     48   // Method called by a screen when user's done with it.
     49   virtual void OnExit(ExitCodes exit_code) = 0;
     50 
     51   // Forces current screen showing.
     52   virtual void ShowCurrentScreen() = 0;
     53 
     54   // Notify about new user names and password. It is used to autologin
     55   // just created user without asking the same info once again.
     56   virtual void OnSetUserNamePassword(const std::string& username,
     57                                      const std::string& password) = 0;
     58 
     59   // Whether usage statistics reporting is enabled on EULA screen.
     60   virtual void SetUsageStatisticsReporting(bool val) = 0;
     61   virtual bool GetUsageStatisticsReporting() const = 0;
     62 
     63   virtual ErrorScreen* GetErrorScreen() = 0;
     64   virtual void ShowErrorScreen() = 0;
     65   virtual void HideErrorScreen(WizardScreen* parent_screen) = 0;
     66 
     67  protected:
     68   virtual ~ScreenObserver() {}
     69 };
     70 
     71 }  // namespace chromeos
     72 
     73 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_
     74