https://bugs.kde.org/show_bug.cgi?id=516399
Bug ID: 516399
Summary: QFileDialog: Warning
"kf.kio.filewidgets.kfilefiltercombo: Could not find
file filter" when calling selectNameFilter() before
show()/exec()
Classification: Plasma
Product: plasma-integration
Version First master
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
When using a native KDE file dialog via QFileDialog (with the KDE platform
theme/plugin active), calling selectNameFilter() or selectMimeTypeFilter()
immediately after setNameFilters() / setMimeTypeFilters() — but before show()
or exec() — triggers warning in the console:
kf.kio.filewidgets.kfilefiltercombo: Could not find file filter "..."
The filter is eventually applied correctly after the dialog is shown, but the
warning appears due to a timing issue: Qt invokes the selection method right
away, while KDE's KFileFilterCombo only populates the filter list later during
dialog initialization (initializeDialog() → setFilters()).
Steps to Reproduce
#include <QApplication>
#include <QFileDialog>
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
QFileDialog dialog(nullptr);
dialog.setNameFilters({
"Text files (*.txt)",
"Images (*.png *.jpg *.jpeg)",
"All files (*)"
});
// This line triggers the warning on KDE/Plasma
dialog.selectNameFilter("Images (*.png *.jpg *.jpeg)");
dialog.exec(); // or dialog.show() + app.exec()
return app.exec();
}
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