Qt 6.3.1 QFileSystemModel TextAlignmentRole issue

Rory_1

My program subclasses QFileSystemModel to set the alignment for a data in a QTreeView. I have created a minimal program to show the issue. I am using a Mac Studio and the latest MacOS and XCode.

pro file:

QT += core gui widgets
SOURCES += main.cpp
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

main.cpp

#include <QtWidgets>

class FSModel : public QFileSystemModel
{
public:
    FSModel(QWidget *parent = nullptr) {}
    QVariant data(const QModelIndex &index, int role) const {
        if (role == Qt::TextAlignmentRole)
            return static_cast<QVariant>(Qt::AlignRight | Qt::AlignVCenter);
        return QFileSystemModel::data(index, role);
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QMainWindow mw;
    QTreeView tree;
    FSModel fsModel;
    fsModel.setRootPath(fsModel.myComputer().toString());
    tree.setModel(&fsModel);
    tree.setStyleSheet("QTreeView::item{padding:10px;}");
    tree.setFixedSize(500,60);
    mw.setCentralWidget(&tree);
    mw.show();
    return a.exec();
}

The line

return static_cast<QVariant>(Qt::AlignRight | Qt::AlignVCenter);

works when compiled in any prior version of Qt, but combining horizontal and vertical alignments does not work in 6.3.1.

Result with 6.3.0

Result with 6.3.1

SGaist

Hi,

I am surprised it works at all, you should not use static_cast, it's the wrong tool. You should properly create a QVariant for example using the fromValue method.

Rory_1

@SGaist Thanks!! That did the trick.