QDialog is going behind QMainWindow after click on QMainWindow screen.......

[Milansinh Vadher]

Hi All,
I am developing one QT application, Where I am creating QMainWindow and have one push button on mainwindow.

After clicking on push button, I am opening QDialog of fixed size.

Code snippet :
class TempDialog : public QDialog
{

}

function :
void MainWindow::on_push_button_clicked() {
Dialog *dialog = new TempDialog(this);
dialog->setModal(true);
dialog->setWindowFlags(Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint |
Qt::WindowStayOnTopHint);
dialog->exec();
}

So, When dialog gets created at that time it's on top of Main Window.

But problem is if we click on main window screen - then dialog is going behind mainwindow screen.

My requirement is like - I don't wont to move dialog behind mainwindow if we touch on mainwindow screen.

Note : My Mainwindow is full screen and Dialog is small square box on top of Mainwindow.

Please suggest me approach how to achieve.

I am using Linux wayland Display for output.

Thanks in advance.

[JonB]

@Milansinh-Vadher
So far as I know it should already stay on top, though I use Xorg not Wayland. Are you sure your TempDialog class does not alter something about the dialog?

It is possible that there is some "desktop setting" which could alter dialog-topness-behaviour, I don't know.

You could also test with Dialog *dialog = new TempDialog(nullptr);. This would make the dialog application-modal instead of mainwindow-modal, just to see how that behaves.

You could also remove your Qt::WindowStayOnTopHint, since that should be necessary, just in case that is actually making it go wrong.

[Milansinh Vadher]

@JonB Yes i am sure it's not altering anything about dialog.

[SGaist]

Hi and welcome to devnet,

Which Linux distribution are you using ?
Are you using a desktop environment and if so which is it ?
Which version of Qt are you using ?
Is it the one from your distribution ?

[Milansinh Vadher]

Hi All,

It's got resolved. Issue was from weston-wayland side and for same weston has given patch.

After applying that patch issue got resolved.

https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/210

Thanks all.