[qt3]invisible toolbar

[jacek]

QMainWindow uses it's own layout, so you must use QMainWindow::setCentralWidget().

Try this:

dialog::dialog(QWidget *parent, const char *name) : QMainWindow(parent, name)
{
   // ...
   QWidget *widget = new QWidget( this );
   QListBox *lista = new QListBox( widget );
   // ...
   QVBoxLayout *pionowy = new QVBoxLayout( widget );
   QHBoxLayout *poziomy = new QHBoxLayout( widget );
   // ...
   pionowy->addLayout( poziomy );
   setCentralWidget( widget );
}

dialog::dialog(QWidget *parent, const char *name) : QMainWindow(parent, name)
{
   // ...
   QWidget *widget = new QWidget( this );
   QListBox *lista = new QListBox( widget );
   // ...
   QVBoxLayout *pionowy = new QVBoxLayout( widget );
   QHBoxLayout *poziomy = new QHBoxLayout( widget );
   // ...
   pionowy->addLayout( poziomy );
   setCentralWidget( widget );
}

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