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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.
#ifndef ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_
#define ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_
#pragma once
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/point.h"
#include "ui/gfx/rect.h"
namespace aura {
class RootWindow;
}
namespace ash {
namespace internal {
class MagnificationController {
public:
MagnificationController();
virtual ~MagnificationController() {}
// Sets the magnification ratio. 1.0f means no magnification.
void SetScale(float scale);
// Returns the current magnification ratio.
float GetScale() const { return scale_; }
// Set the top-left point of the magnification window.
void MoveWindow(int x, int y);
void MoveWindow(const gfx::Point& point);
// Returns the current top-left point of the magnification window.
gfx::Point GetWindowPosition() const { return gfx::Point(x_, y_); }
// Ensures that the given point/rect is inside the magnification window. If
// not, the controller moves the window to contain the given point/rect.
void EnsureShowRect(const gfx::Rect& rect);
void EnsureShowPoint(const gfx::Point& point, bool animation);
private:
aura::RootWindow* root_window_;
// Current scale, position of the magnification window.
float scale_;
int x_;
int y_;
// Returns the rect of the magnification window.
gfx::Rect GetWindowRect();
// Moves the magnification window to new scale and position. This method
// should be called internally just after the scale and/or the position are
// changed.
void RedrawScreen(bool animation);
DISALLOW_COPY_AND_ASSIGN(MagnificationController);
};
} // namespace internal
} // namespace ash
#endif // ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_
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