setSizePolicy ignored

The use of setSizePolicy (QSizePolicy::Minimum, QSizePolicy::Fixed) in a QDialog subclass is ignored - the dialog may be resized both horizontally and vertically - on Linux, but is correctly honored -the dialog may only be resized horizontally - on Mac OS X. The content of the QDialog widget uses setLayout with a QGridLayout.

Example:

Dialog.hh -

#include <QDialog>

class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog (QWidget *parent = 0);
};

Dialog.cc -

#include "Dialog.hh"
#include <QGridLayout>
#include <QLabel>

Dialog::Dialog (QWidget *parent) : QDialog (parent)
{
setSizePolicy (QSizePolicy::Minimum, QSizePolicy::Fixed);

QGridLayout *layout = new QGridLayout;
layout->addWidget (new QLabel ("Dialog"), 0, 0);
setLayout (layout);
}

main.cc -

#include <QApplication>
#include "Dialog.hh"

int main (int argc, char** argv)
{
QApplication application (argc, argv);
Dialog *dialog = new Dialog;
dialog->show ();
return application.exec ();
}