addMenu problem

[nicolas1]

Hello,

Seems trivial problem, but do not understand why this happens?
Simple program crashes on " menuBar()->addMenu(file_menu_); "

Any suggestion?

class PhotoWarperWindow : public QMainWindow
{
  Q_OBJECT
}
 
PhotoWarperWindow::PhotoWarperWindow(void)
{
  QWidget *widget = new QWidget;
 
  setCentralWidget(widget);
 
  QVBoxLayout *layout = new QVBoxLayout;
 
  layout->setMargin(5);
 
  widget->setLayout(layout);
 
  //CreateActions();
  CreateMenus();
 
  setWindowTitle(QString::fromUtf8("Menus"));
  setMinimumSize(160, 160);
  resize(480, 320);
}
 
void PhotoWarperWindow::CreateMenus()
{
  QMenuBar *mb =  menuBar();
 
  file_menu_ = new QMenu(menuBar());
 
  menuBar()->addMenu(file_menu_);  <- PROGRAM CRASH HERE
}
 
 
int main(int argc, char* argv[])
{
  QApplication app(argc, argv);
 
  PhotoWarperWindow window;
 
  window.show();
 
  return app.exec();
}

class PhotoWarperWindow : public QMainWindow
{
  Q_OBJECT
}

PhotoWarperWindow::PhotoWarperWindow(void)
{
  QWidget *widget = new QWidget;

  setCentralWidget(widget);

  QVBoxLayout *layout = new QVBoxLayout;

  layout->setMargin(5);

  widget->setLayout(layout);

  //CreateActions();
  CreateMenus();

  setWindowTitle(QString::fromUtf8("Menus"));
  setMinimumSize(160, 160);
  resize(480, 320);
}

void PhotoWarperWindow::CreateMenus()
{
  QMenuBar *mb =  menuBar();

  file_menu_ = new QMenu(menuBar());

  menuBar()->addMenu(file_menu_);  <- PROGRAM CRASH HERE
}


int main(int argc, char* argv[])
{
  QApplication app(argc, argv);

  PhotoWarperWindow window;

  window.show();

  return app.exec();
}

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[ComaWhite]

Try it this way

fileMenu = menuBar()->addMenu(tr("&File"));

fileMenu = menuBar()->addMenu(tr("&File"));

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And look at this example
http://doc.trolltech.com/4.5/mainwindows-menus.html

[nicolas1]

Changed to:

file_menu_ = menuBar()->addMenu(tr("&File"));

file_menu_ = menuBar()->addMenu(tr("&File"));

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Program does not get crashed here, but crashes later:

setWindowTitle(QString::fromUtf8("Menus"));

setWindowTitle(QString::fromUtf8("Menus"));

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Surely, I checked "Menus" sample and made same code... But program get crashed

Last call from stack:
QCoreApplication::notifyInternal

[spirit]

could you post compilable example?

[nicolas1]

Solved!

Recompiled source file, where

int main(int argc, char* argv[])
{
  QApplication app(argc, argv);
 
  PhotoWarperWindow window;
 
  window.show();
 
  return app.exec();
}

int main(int argc, char* argv[])
{
  QApplication app(argc, argv);
 
  PhotoWarperWindow window;
 
  window.show();
 
  return app.exec();
}

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And built app, problem cleared... ((