F.E.I.S/Toolbox.h

//
// Created by Syméon on 13/01/2019.
//

#ifndef FEIS_TOOLBOX_H
#define FEIS_TOOLBOX_H

#define IM_MAX(_A,_B)       (((_A) >= (_B)) ? (_A) : (_B))

#include <SFML/Window.hpp>
#include <filesystem>

namespace Toolbox {
    bool isShortcutPressed(std::initializer_list<sf::Keyboard::Key> anyOf, std::initializer_list<sf::Keyboard::Key> allOf);
    void pushNewRecentFile(std::filesystem::path path);
    std::vector<std::string> getRecentFiles();

    struct CustomConstraints {
        static void ContentSquare(ImGuiSizeCallbackData* data) {
            float TitlebarHeight = ImGui::GetFontSize() + ImGui::GetStyle().FramePadding.y * 2.f;
            float y = data->DesiredSize.y - TitlebarHeight;
            float x = data->DesiredSize.x;
            data->DesiredSize = ImVec2(IM_MAX(x,y), IM_MAX(x,y) + TitlebarHeight);
        }
    };
}

template<typename T>
class AffineTransform {
public:
    AffineTransform(T low_input, T high_input, T low_output, T high_output)  {
        if (low_input == high_input) {
            throw std::invalid_argument("low and high input values for affine transform must be different !");
        }
        a = (high_output-low_output)/(high_input-low_input);
        b = (high_input*low_output - high_output*low_input)/(high_input-low_input);
    };
    T transform(T val) {return a*val + b;};
    T backwards_transform(T val) {
        // if we're too close to zero
        if (std::abs(a) < 10e-10) {
            throw std::runtime_error("Can't apply backwards transformation, coefficient is too close to zero");
        } else {
            return (val-b)/a;
        }
    };
private:
    T a;
    T b;
};

#endif //FEIS_TOOLBOX_H