Qt 5.9 | Qt Network | Network Download Manager Example | textprogressbar.cpp Example File

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# textprogressbar.cpp Example File

downloadmanager/textprogressbar.cpp

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      #include "textprogressbar.h"
      #include <QByteArray>
      #include <stdio.h>

      TextProgressBar::TextProgressBar()
          : value(0), maximum(-1), iteration(0)
      {
      }

      void TextProgressBar::clear()
      {
          printf("\n");
          fflush(stdout);

          iteration = 0;
          value = 0;
          maximum = -1;
      }

      void TextProgressBar::update()
      {
          ++iteration;

          if (maximum > 0) {
              // we know the maximum
              // draw a progress bar
              int percent = value * 100 / maximum;
              int hashes = percent / 2;

              QByteArray progressbar(hashes, '#');
              if (percent % 2)
                  progressbar += '>';

              printf("\r[%-50s] %3d%% %s     ",
                     progressbar.constData(),
                     percent,
                     qPrintable(message));
          } else {
              // we don't know the maximum, so we can't draw a progress bar
              int center = (iteration % 48) + 1; // 50 spaces, minus 2
              QByteArray before(qMax(center - 2, 0), ' ');
              QByteArray after(qMin(center + 2, 50), ' ');

              printf("\r[%s###%s]      %s      ",
                     before.constData(), after.constData(), qPrintable(message));
          }
      }

      void TextProgressBar::setMessage(const QString &m)
      {
          message = m;
      }

      void TextProgressBar::setStatus(qint64 val, qint64 max)
      {
          value = val;
          maximum = max;
      }