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 ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_ 6 #define ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_ 7 8 #include "ash/ash_export.h" 9 #include "base/compiler_specific.h" 10 #include "base/logging.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "ui/gfx/point.h" 13 #include "ui/gfx/rect.h" 14 15 namespace aura { 16 class RootWindow; 17 } 18 19 namespace ash { 20 21 class ASH_EXPORT MagnificationController { 22 public: 23 enum ScrollDirection { 24 SCROLL_NONE, 25 SCROLL_LEFT, 26 SCROLL_RIGHT, 27 SCROLL_UP, 28 SCROLL_DOWN 29 }; 30 ~MagnificationController()31 virtual ~MagnificationController() {} 32 33 // Creates a new MagnificationController. The caller takes ownership of the 34 // returned object. 35 static MagnificationController* CreateInstance(); 36 37 // Enables (or disables if |enabled| is false) screen magnifier feature. 38 virtual void SetEnabled(bool enabled) = 0; 39 40 // Returns if the screen magnifier is enabled or not. 41 virtual bool IsEnabled() const = 0; 42 43 // Sets the magnification ratio. 1.0f means no magnification. 44 virtual void SetScale(float scale, bool animate) = 0; 45 // Returns the current magnification ratio. 46 virtual float GetScale() const = 0; 47 48 // Set the top-left point of the magnification window. 49 virtual void MoveWindow(int x, int y, bool animate) = 0; 50 virtual void MoveWindow(const gfx::Point& point, bool animate) = 0; 51 // Returns the current top-left point of the magnification window. 52 virtual gfx::Point GetWindowPosition() const = 0; 53 54 virtual void SetScrollDirection(ScrollDirection direction) = 0; 55 56 // Returns |point_of_interest_| in MagnificationControllerImpl. This is 57 // the internal variable to stores the last mouse cursor (or last touched) 58 // location. This method is only for test purpose. 59 virtual gfx::Point GetPointOfInterestForTesting() = 0; 60 61 protected: MagnificationController()62 MagnificationController() {} 63 64 private: 65 DISALLOW_COPY_AND_ASSIGN(MagnificationController); 66 }; 67 68 } // namespace ash 69 70 #endif // ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_ 71