I would like to filter the files that are shown in a QFileDialog
more specifically than just by file extensions. The examples I found in the Qt documentation only show filters like Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)
and such. In addition to this I would also like to specify a filter for files that should not show up in the file dialog, e.g. XML files (*.xml)
but not Backup XML files (*.backup.xml)
.
So the problem I have is that I would like to show some files in the file dialog that have certain file extension, but I would not like to show other files with a specific file name suffix (and the same file extension).
For example:
Files to show:
file1.xml
file2.xml
Files not to show:
file1.backup.xml
file2.backup.xml
I would like to ask if it is possible to define filters like these for a QFileDialog
?
I believe what you can do is:
Below is an example:
Proxy model:
class FileFilterProxyModel : public QSortFilterProxyModel
{
protected:
virtual bool filterAcceptsRow(int source_row, const QModelIndex& source_parent) const;
};
bool FileFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
{
QModelIndex index0 = sourceModel()->index(sourceRow, 0, sourceParent);
QFileSystemModel* fileModel = qobject_cast<QFileSystemModel*>(sourceModel());
return fileModel->fileName(index0).indexOf(".backup.") < 0;
// uncomment to call the default implementation
//return QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent);
}
dialog was created this way:
QFileDialog dialog;
dialog.setOption(QFileDialog::DontUseNativeDialog);
dialog.setProxyModel(new FileFilterProxyModel);
dialog.setNameFilter("XML (*.xml)");
dialog.exec();
The proxy model is supported by non-native file dialogs only.