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