textProgressBar.cc

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// textProgressBar
#include "textProgressBar.h"
 
// c++
#include <iostream>
using std::cout, std::endl;
 
void TextProgressBar::setProgress(int p) {
    // See header for API docs.
 
    // step too small
    if (p < indexStep) return;
 
    // step too small
    if (singleStep == 0) return;
 
    // outside boundaries
    if (p < min || p > max) return;
 
    // progress is between 1 and 100
    // Note: progress is computed from the current threshold (indexStep) and step size (singleStep),
    // not directly from p, because printing is throttled to discrete internal steps.
    double progress = indexStep / singleStep;
 
    // progress outside boundaries
    if (progress > TEXTPROGRESSBARNSTEPS) return;
 
    // adding the single step
    indexStep += singleStep;
 
    // printing header of the bar
    cout << title << startBarChar;
 
    // pos is relative position within the bar
    int pos = barWidth * (progress / TEXTPROGRESSBARNSTEPS);
 
    // print bar, and advance char, empty space at the right places
    for (int i = 0; i < barWidth; ++i) {
        if (i < pos) cout << middleBarChar;
        else if (i == pos) cout << advanceBarChar;
        else cout << " ";
    }
    // print end bar and progress percentage
    cout << endBarChar << " " << progress << " %\r";
 
    // carriage return if needed
    if (progress == TEXTPROGRESSBARNSTEPS) cout << endl;
 
    cout.flush();
}