Rect.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2024 Bruno Van de Velde (vdv_b@tgui.eu)
//
// 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 TGUI_RECT_HPP
#define TGUI_RECT_HPP
 
#include <TGUI/Vector2.hpp>
 
#if TGUI_HAS_RENDERER_BACKEND_SFML_GRAPHICS && !TGUI_DISABLE_SFML_CONVERSIONS
    #include <SFML/Graphics/Rect.hpp>
#endif
 
 
TGUI_MODULE_EXPORT namespace tgui
{
    template <typename T>
    class Rect
    {
    public:
 
        constexpr Rect() = default;
 
        template <typename U>
        explicit constexpr Rect(const Rect<U>& rect) :
            left  {static_cast<T>(rect.left)},
            top   {static_cast<T>(rect.top)},
            width {static_cast<T>(rect.width)},
            height{static_cast<T>(rect.height)}
        {
        }
 
#if TGUI_HAS_RENDERER_BACKEND_SFML_GRAPHICS && !TGUI_DISABLE_SFML_CONVERSIONS
        explicit constexpr Rect(sf::Rect<T> rect) :
            left  {rect.left},
            top   {rect.top},
            width {rect.width},
            height{rect.height}
        {
        }
#endif
 
        constexpr Rect(T rectLeft, T rectTop, T rectWidth, T rectHeight) :
            left  {rectLeft},
            top   {rectTop},
            width {rectWidth},
            height{rectHeight}
        {
        }
 
        constexpr Rect(Vector2<T> position, Vector2<T> size) :
            left  {position.x},
            top   {position.y},
            width {size.x},
            height{size.y}
        {
        }
 
        constexpr void setPosition(Vector2<T> position)
        {
            left = position.x;
            top = position.y;
        }
 
        TGUI_NODISCARD constexpr Vector2<T> getPosition() const
        {
            return {left, top};
        }
 
        constexpr void setSize(Vector2<T> size)
        {
            width = size.x;
            height = size.y;
        }
 
        TGUI_NODISCARD constexpr Vector2<T> getSize() const
        {
            return {width, height};
        }
 
#if TGUI_HAS_RENDERER_BACKEND_SFML_GRAPHICS && !TGUI_DISABLE_SFML_CONVERSIONS
        explicit operator sf::Rect<T>() const
        {
            return sf::Rect<T>{left, top, width, height};
        }
#endif
 
        TGUI_NODISCARD constexpr bool contains(const Vector2<T>& pos) const
        {
            return (pos.x >= left) && (pos.x < left + width) && (pos.y >= top) && (pos.y < top + height);
        }
 
        TGUI_NODISCARD constexpr bool intersects(const Rect<T>& rect) const
        {
            // Compute the intersection boundaries
            const T interLeft   = std::max(left, rect.left);
            const T interTop    = std::max(top, rect.top);
            const T interRight  = std::min(left + width, rect.left + rect.width);
            const T interBottom = std::min(top + height, rect.top + rect.height);
 
            // If the intersection is valid (positive non zero area), then there is an intersection
            return (interLeft < interRight) && (interTop < interBottom);
        }
 
    public:
 
        T left = 0;   
        T top = 0;    
        T width = 0;  
        T height = 0; 
    };
 
    template <typename T>
    TGUI_NODISCARD constexpr bool operator==(const Rect<T>& left, const Rect<T>& right)
    {
        return (left.left == right.left) && (left.width == right.width)
            && (left.top == right.top) && (left.height == right.height);
    }
 
    template <typename T>
    TGUI_NODISCARD constexpr bool operator!=(const Rect<T>& left, const Rect<T>& right)
    {
        return !(left == right);
    }
 
 
    using FloatRect = Rect<float>;
    using IntRect = Rect<int>;
    using UIntRect = Rect<unsigned int>;
}
 
 
#endif // TGUI_RECT_HPP