bwidgets/input.hpp

#ifndef INPUT_HPP
#define INPUT_HPP

#include "widget.hpp"

template<typename T> class Input : public Widget
{
protected:
    SDL_Rect _input_field_area;
    T _value;

    Input(SDL_Renderer* r) : Widget(r) {}
    virtual void _update_drawing_areas() = 0;

public:
    virtual void viewport(SDL_Rect vp)
    {
        Widget::viewport(vp);
        _update_drawing_areas();
    }

    virtual void render()
    {
        Widget::render();

        SDL_Rect old_vp;

        SDL_RenderGetViewport(_renderer, &old_vp);
        SDL_RenderSetViewport(_renderer, &_viewport);

        SDL_SetRenderDrawColor(_renderer, 0, 0, 255, SDL_ALPHA_OPAQUE);
        SDL_RenderDrawRect(_renderer, &_input_field_area);

        SDL_RenderSetViewport(_renderer, &old_vp);
    }
};

#endif