View.hpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//

#ifndef SFML_VIEW_HPP
#define SFML_VIEW_HPP

// Headers
#include <SFML/Config.hpp>
#include <SFML/Graphics/Rect.hpp>
#include <SFML/Graphics/Matrix3.hpp>
#include <SFML/System/Vector2.hpp>


namespace sf
{
class RenderTarget;

class SFML_API View
{
public :

    explicit View(const FloatRect& ViewRect = FloatRect(0, 0, 1000, 1000));

    View(const sf::Vector2f& Center, const sf::Vector2f& HalfSize);

    void SetCenter(float X, float Y);

    void SetCenter(const sf::Vector2f& Center);

    void SetHalfSize(float HalfWidth, float HalfHeight);

    void SetHalfSize(const sf::Vector2f& HalfSize);

    void SetFromRect(const FloatRect& ViewRect);

    const sf::Vector2f& GetCenter() const;

    const sf::Vector2f& GetHalfSize() const;

    const sf::FloatRect& GetRect() const;

    void Move(float OffsetX, float OffsetY);

    void Move(const sf::Vector2f& Offset);

    void Zoom(float Factor);

private :

    friend class RenderTarget;

    const Matrix3& GetMatrix() const;

    void RecomputeMatrix();

    // Member data
    sf::Vector2f myCenter;     
    sf::Vector2f myHalfSize;   
    FloatRect    myRect;       
    Matrix3      myMatrix;     
    bool         myNeedUpdate; 
};

} // namespace sf


#endif // SFML_VIEW_HPP