QMenu opens first time off screen

[TheBigOnion2]

Hello,
I have a QMenu that is loaded from a model. It is used very much like the older Windows Start button. When I click my QPushButton the menu appears above it. This works perfectly. But when I go to the top of the menu and mouse over "Programs" which opens a sub-menu to the right. The new sub-menu opens but is positioned too low. The bottom of it goes over the task bar and a little bit off the screen. If I move my mouse and then hover over "Programs" again, the sub-menu positions itself correctly.

I have searched long and wide and cannot find a resolution for this. Can someone please shed some light on this for me?

[SGaist]

Hi and welcome to devnet,

What version of Qt are you using ? On which OS ?

Can you provide a minimal compilable example that reproduces this ?

[TheBigOnion2]

Hi,
I'm on RHEL 6 and QT 4. I cannot really post the code as I would have to post my whole application. And I do not know what specific code controls the position of the menu. (thus my question).

Thanks for the help.

[SGaist]

That's one of the reason of making a minimal example. You can put in it just the part that create the QMenu and test it there

[TheBigOnion2]

I really just need to know if someone has had this same problem and what they did to fix it.
Or, what the method/property is on the menu to check/set the starting position.

[lman]

This is an old post but I ran into the same thing with a submenu on a system tray icon.
My system is opensuse leap 15.3 running kde. Qt version 5.12.7. I also compiled with Qt 6.2.2 - no change in behaviour
Below is a minimal application which shows the problem
After starting an icon should appear in the system tray. The problem:
Right click on the icon and move the mouse up to "sub". The submenu will open but not all items are accessible - part of the menu is "off screen" !
Now move the mouse up to "item" and back down to "sub". The submenu is now perfect - all items visible.
After this the menu is always visible until the application is restarted.

Code:

#include <QApplication>
#include <QSystemTrayIcon>
#include <QMenu>
#include <QIcon>

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

  QIcon icon = QIcon::fromTheme("document-open");
  QSystemTrayIcon* sti = new QSystemTrayIcon(icon);
  sti->show();

  QMenu *menu = new QMenu;

  menu->addSeparator();

  menu->addAction("item");

  QMenu* submenu = new QMenu("sub");
  submenu->addAction("s1");
  submenu->addAction("s2");
  submenu->addAction("s3");
  submenu->addAction("s4");
  submenu->addAction("s5");

  menu->addMenu(submenu);
  sti->setContextMenu(menu);

  return app.exec();
}

[Christian Ehrlicher]

You should try with a recent version of Qt.

[lman]

Hi. Thanks for the speedy response.
I installed Qt 6.7.2. The behaviour is still as described above.

[Christian Ehrlicher]

Then please provide a bug report (search first if the issue is already reported): bugreports.qt.io