progress_bar.hpp

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#ifndef EAGINE_PROGRESS_BAR_HPP
#define EAGINE_PROGRESS_BAR_HPP
 
#include "string_span.hpp"
#include <string>
 
namespace eagine {
//------------------------------------------------------------------------------
template <typename Putter>
void format_progress_bar(
  Putter& put,
  int width,
  float min,
  float max,
  float prev,
  float curr);
//------------------------------------------------------------------------------
class progress_bar {
public:
    progress_bar() noexcept = default;
 
    auto set_width(int w) noexcept -> auto& {
        _width = w < 0 ? 0 : w;
        return *this;
    }
 
    auto set_min(float min) noexcept -> auto& {
        _min = min;
        return *this;
    }
 
    auto set_max(float max) noexcept -> auto& {
        _max = max;
        return *this;
    }
 
    auto reformat() noexcept -> progress_bar&;
 
    auto update(float value) noexcept -> progress_bar&;
 
    auto get() const noexcept -> string_view {
        return {_buffer.c_str(), span_size_t(_idx)};
    }
 
private:
    int _width{80};
    float _min{-1.F};
    float _max{+1.F};
    float _prev{0.F};
    float _curr{0.F};
    std::size_t _idx{0};
    std::string _buffer;
};
//------------------------------------------------------------------------------
} // namespace eagine
 
#include <eagine/progress_bar.inl>
 
#endif // EAGINE_PROGRESS_BAR_HPP