CODEWITHSUNDEEP
c++qt
manatttta
manatttta

Reputation: 3124

QFileDialog does not emit signals

I have a QFileDialog in Qt for saving a file.

It is not smmiting signals. I connect it via QFileDialog diag(this); ...

connect(
        dialog, SIGNAL(filterSelected(const QString&)),
        this,                 SLOT(saveAsDiagFilterSelected(const QString&)),
        Qt::QueuedConnection);

Then call it with exec(). The saveAsDiagFilterSelected is never called.

What might be wrong?

This is how I create my dialog:

dialog = new QFileDialog(this);
dialog->setFileMode(QFileDialog::AnyFile);
dialog->setNameFilters(filterList);
dialog->setAcceptMode(QFileDialog::AcceptSave);
dialog->setWindowTitle(windowTitle);

I tried implementing the new signal API (as suggested in comments):

connect(
        dialog, &QFileDialog::filterSelected,
        this,   &MainWindow::saveAsDiagFilterSelected);

but still no results.

Update

Found out that using the OS native dialog (I'm under Linux, dont know if this happens in other SO's), is creating the problem. If I do

dialog->setOption(QFileDialog::DontUseNativeDialog, true);

the signal is emmited. How can I workaround this?

Upvotes: 1

Views: 777

Answers (2)

Kuba hasn't forgotten Monica
Kuba hasn't forgotten Monica

Reputation: 98425

The native dialog on your platform does not inform the user about filter changes, so there's nothing for Qt to emit signals on - it isn't possible with that particular native dialog. Or perhaps the requisite functionality isn't implemented in Qt. This behavior is platform specific. It works on Windows at least.

Upvotes: 2

ahmed
ahmed

Reputation: 5600

Try setting slots/signals like this:

connect(
        dialog, SIGNAL(filterSelected(QString)),
        this, SLOT(saveAsDiagFilterSelected(QString)),
        Qt::QueuedConnection);

Upvotes: 1

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