bwidgets/inc/basic_widgets/w/base/input.hpp

#ifndef BWIDGETS_INPUT_HPP
#define BWIDGETS_INPUT_HPP

#include <basic_widgets/core/type/concepts.hpp>
#include <basic_widgets/w/base/widget.hpp>
#include <basic_widgets/w/feat/font_handler.hpp>
#include <basic_widgets/w/feat/keyboard_handler.hpp>
#include <basic_widgets/w/feat/mouse_handler.hpp>

namespace bwidgets
{

    template<typename T>
    class Input : public virtual Widget,
                  public virtual FontHandler,
                  public virtual KeyboardHandler,
                  public virtual MouseHandler
    {
    protected:
        using Widget::Widget;

    public:
        static const int          default_border_width = 3;
        inline static const Color default_color_bg = {200, 200, 200, SDL_ALPHA_OPAQUE};
        inline static const Color default_color_bg_focused = {255, 255, 255,
                                                              SDL_ALPHA_OPAQUE};
        static const int          default_float_precision  = 2;
        static const int          default_min_width        = 1;

        int   border_width     = default_border_width;
        Color color_bg_default = default_color_bg;
        Color color_bg_focused = default_color_bg_focused;
        int   float_precision  = default_float_precision;
        int   input_min_width  = default_min_width;
        char  input_width_unit = 'W';
        T     value {};

        virtual void               color_fg(Color c)                      = 0;
        [[nodiscard]] virtual auto input_text() const -> std::string_view = 0;
        virtual void               input_text(std::string txt)            = 0;
        [[nodiscard]] virtual auto is_valid_input(std::string_view) const noexcept
          -> bool                                                         = 0;
        [[nodiscard]] virtual auto process_value(T x) const noexcept -> T = 0;
        [[nodiscard]] virtual auto value_from_string(std::string_view s) const noexcept
          -> T = 0;
        [[nodiscard]] virtual auto value_to_string(T value) const noexcept
          -> std::string = 0;
    };
}

#endif