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_ACCESSIBILITY_MAGNIFICATION_MANAGER_H_ 6 #define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_MAGNIFICATION_MANAGER_H_ 7 8 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h" 9 10 class Profile; 11 12 namespace chromeos { 13 14 // MagnificationManager controls the full screen magnifier from chrome-browser 15 // side (not ash side). 16 // 17 // MagnificationManager does: 18 // - Watch logged-in. Changes the behavior between the login screen and user 19 // desktop. 20 // - Watch change of the pref. When the pref changes, the setting of the 21 // magnifier will interlock with it. 22 23 class MagnificationManager { 24 public: 25 // Creates an instance of MagnificationManager. This should be called once, 26 // Returns the existing instance. If there is no instance, creates one. 27 // because only one instance should exist at the same time. 28 static void Initialize(); 29 30 // Deletes the existing instance of MagnificationManager. 31 static void Shutdown(); 32 33 // Returns the existing instance. If there is no instance, returns NULL. 34 static MagnificationManager* Get(); 35 36 // Returns if the screen magnifier is enabled. 37 virtual bool IsMagnifierEnabled() const = 0; 38 39 // Returns the current type of the screen magnifier. 40 virtual ash::MagnifierType GetMagnifierType() const = 0; 41 42 // Enables the screen magnifier. 43 virtual void SetMagnifierEnabled(bool enabled) = 0; 44 45 // Changes the type of the screen magnifier. 46 virtual void SetMagnifierType(ash::MagnifierType type) = 0; 47 48 // Saves the magnifier scale to the pref. 49 virtual void SaveScreenMagnifierScale(double scale) = 0; 50 51 // Loads the magnifier scale from the pref. 52 virtual double GetSavedScreenMagnifierScale() const = 0; 53 54 virtual void SetProfileForTest(Profile* profile) = 0; 55 56 protected: 57 virtual ~MagnificationManager() {} 58 }; 59 60 } // namespace chromeos 61 62 #endif // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_MAGNIFICATION_MANAGER_H_ 63
