QWinTaskbarProgress won't show

Question

I'm using windows7 and Qt5.3.0 I added below to my MainWindow's constructor but nothing shows on my taskbar. Did I miss something?

QWinTaskbarProgress * pTaskbarProgress = new QWinTaskbarProgress(this);
pTaskbarProgress->setMinimum(0);
pTaskbarProgress->setMaximum(100);
pTaskbarProgress->setValue(50);
pTaskbarProgress->show();

did you resolve the issue? – László Papp Jul 22 '14 at 06:06 — László Papp, Jul 22 '14 at 06:06

score 12 · Answer 1 · edited Mar 31 '15 at 13:50

12

In fact, it seems like calling

button->setWindow(widget->windowHandle());

in QMainWindow constructor doesn't work and QWinTaskbarProgress won't show at all even after calling setVisible(true) or show().

If created in the QMainWindow constructor it has to be called once the Window is shown like in:

void MainWindow::showEvent(QShowEvent *e)
{
#ifdef Q_OS_WIN32
    m_button->setWindow(windowHandle());
#endif

    e->accept();
}

edited Mar 31 '15 at 13:50

Bowdzone

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answered Nov 13 '14 at 14:01

Kervala

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Thanks! `QMainWindow constructor doesn't work` this is the correct answer for me! – JustWe Jul 05 '18 at 05:49

score 9 · Accepted Answer · edited May 26 '15 at 20:37

9

See the example in the documentation:

QWinTaskbarButton *button = new QWinTaskbarButton(widget);
button->setWindow(widget->windowHandle());
button->setOverlayIcon(QIcon(":/loading.png"));

QWinTaskbarProgress *progress = button->progress();
progress->setVisible(true);
progress->setValue(50);

Seems to me like you have to set this as part of a QWinTaskbarButton.

edited May 26 '15 at 20:37

p.i.g.

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answered Jul 19 '14 at 13:45

onli

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1

That really should be included in [the documentation](http://doc.qt.io/qt-5/qwintaskbarprogress.html). – Nathan Osman Jan 23 '16 at 20:41

score 3 · Answer 3 · answered Jul 19 '14 at 14:34

The history behind this class is that it was part of QWinTaskbarButton, thus it was inherently tightly coupled with that class. You can see the relevant upstream commit that began the refactoring and hence decoupling:

Refactor QWinTaskbarProgress out of QWinTaskbarButton

You are right that it is not too explicit in QWinTaskbarProgress' documentation, so this could be potentially improved upstream, but the QWinTaskbarButton example as well as the Music Player example shows the point, namely you have to replace this line:

QWinTaskbarProgress * pTaskbarProgress = new QWinTaskbarProgress(this);

with:

QWinTaskbarButton * pTaskbarButton = new QWinTaskbarButton(this);
pTaskbarButton->setWindow(windowHandle());
QWinTaskbarProgress * pTaskbarProgress = pTaskbarButton->progress();

You may wish to set the overlay icon as well for the taskbar button with either a custom image or something like what the Music Player examples does:

pTaskbarButton->setOverlayIcon(style()->standardIcon(QStyle::SP_MediaPlay));

QWinTaskbarProgress won't show

3 Answers3

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