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// Copyright (c) 2012 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.
#include "ash/ash_export.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/rect.h"
namespace aura {
class RootWindow;
namespace ash {
class ASH_EXPORT MagnificationController {
enum ScrollDirection {
virtual ~MagnificationController() {}
// Creates a new MagnificationController. The caller takes ownership of the
// returned object.
static MagnificationController* CreateInstance();
// Enables (or disables if |enabled| is false) screen magnifier feature.
virtual void SetEnabled(bool enabled) = 0;
// Returns if the screen magnifier is enabled or not.
virtual bool IsEnabled() const = 0;
// Sets the magnification ratio. 1.0f means no magnification.
virtual void SetScale(float scale, bool animate) = 0;
// Returns the current magnification ratio.
virtual float GetScale() const = 0;
// Set the top-left point of the magnification window.
virtual void MoveWindow(int x, int y, bool animate) = 0;
virtual void MoveWindow(const gfx::Point& point, bool animate) = 0;
// Returns the current top-left point of the magnification window.
virtual gfx::Point GetWindowPosition() const = 0;
virtual void SetScrollDirection(ScrollDirection direction) = 0;
// Returns the view port(i.e. the current visible window)'s Rect in root
// window coordinates.
virtual gfx::Rect GetViewportRect() const = 0;
// Follows the focus on web page for non-editable controls.
virtual void HandleFocusedNodeChanged(
bool is_editable_node,
const gfx::Rect& node_bounds_in_screen) = 0;
// Returns |point_of_interest_| in MagnificationControllerImpl. This is
// the internal variable to stores the last mouse cursor (or last touched)
// location. This method is only for test purpose.
virtual gfx::Point GetPointOfInterestForTesting() = 0;
// Returns true if magnifier is still on animation for moving viewport.
// This is only used for testing purpose.
virtual bool IsOnAnimationForTesting() const = 0;
MagnificationController() {}
} // namespace ash