The drop area for QToolBar gets triggered even when the toolbar is not on the window.

#include <QApplication> 
#include <QMainWindow> 
#include <QToolBar>
int main(int argc, char *argv[]) {     
qDebug() << "Qt version:" << QT_VERSION_STR;          
QApplication app(argc, argv);          
QMainWindow win;     
win.resize(600, 400);     
QToolBar *toolbar = new QToolBar("Main Toolbar", &win);     
QAction *newAction = toolbar->addAction("New");     
QAction *openAction = toolbar->addAction("Open");     
win.addToolBar(Qt::TopToolBarArea, toolbar);          
win.show();          
return app.exec(); 
}