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50
51#include "textprogressbar.h"
52
53#include <QByteArray>
54
55#include <cstdio>
56
57using namespace std;
58
59void TextProgressBar::clear()
60{
61 printf(format: "\n");
62 fflush(stdout);
63
64 value = 0;
65 maximum = -1;
66 iteration = 0;
67}
68
69void TextProgressBar::update()
70{
71 ++iteration;
72
73 if (maximum > 0) {
74 // we know the maximum
75 // draw a progress bar
76 int percent = value * 100 / maximum;
77 int hashes = percent / 2;
78
79 QByteArray progressbar(hashes, '#');
80 if (percent % 2)
81 progressbar += '>';
82
83 printf(format: "\r[%-50s] %3d%% %s ",
84 progressbar.constData(),
85 percent,
86 qPrintable(message));
87 } else {
88 // we don't know the maximum, so we can't draw a progress bar
89 int center = (iteration % 48) + 1; // 50 spaces, minus 2
90 QByteArray before(qMax(a: center - 2, b: 0), ' ');
91 QByteArray after(qMin(a: center + 2, b: 50), ' ');
92
93 printf(format: "\r[%s###%s] %s ",
94 before.constData(), after.constData(), qPrintable(message));
95 }
96}
97
98void TextProgressBar::setMessage(const QString &m)
99{
100 message = m;
101}
102
103void TextProgressBar::setStatus(qint64 val, qint64 max)
104{
105 value = val;
106 maximum = max;
107}
108

source code of qtbase/examples/network/downloadmanager/textprogressbar.cpp