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#ifndef __PROGRESS_BAR_H__
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#define __PROGRESS_BAR_H__
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#include <cmath>
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#include <cstdint>
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#include <iostream>
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#include <string>
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class ProgressBar
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{
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public:
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ProgressBar(
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const std::string& label,
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uint32_t bar_length,
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uint8_t progress=0)
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: label(label),
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bar_length(bar_length),
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progress(progress)
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{ }
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~ProgressBar() = default;
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void update(uint8_t new_progress)
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{
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// Progress is defined between 0 and 100 inclusive
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if (this->progress >= 100)
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{
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return;
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}
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this->progress = new_progress;
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std::cout << this->label;
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std::cout << " [";
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uint32_t pos = std::lround((static_cast<double>(this->progress) / 100)
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* this->bar_length);
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for (uint32_t idx = 0; idx < this->bar_length; ++idx)
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{
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if (idx < pos)
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{
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std::cout << "=";
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}
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else if ((idx == pos) && (idx == this->bar_length))
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{
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std::cout << "=";
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}
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else if (idx == pos)
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{
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std::cout << ">";
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}
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else
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{
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std::cout << " ";
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}
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}
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std::cout << "] " << int(this->progress) << " %\r";
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// NOTE: normally newline would only be output when progress reaches
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// 100% but here we redrawing an entire section of lines so
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// we want a newline for each update() call
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std::cout << std::endl;
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}
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ProgressBar& operator++()
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{
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this->update(this->progress + 1);
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return *this;
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}
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private:
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std::string label;
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uint32_t bar_length;
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uint8_t progress;
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};
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#endif // __PROGRESS_BAR_H__
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