Qt Reference Documentation

# textprogressbar.cpp Example File

network/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;
     }