- Qt 5.5
- Qt Network
- Network Download Manager Example
- textprogressbar.cpp Example File
- Qt 5.5.1 Reference Documentation

# 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;
    }