The help page of int QMessageBox::exec() (https://doc.qt.io/qt-6/qmessagebox.html#exec) says:
When using a QMessageBox with standard buttons, this function returns a StandardButton value indicating the standard button that was clicked.
When using QMessageBox with custom buttons, this function returns an opaque value; use clickedButton() to determine which button was clicked.
exporting, the extra dialog appearing when choosing to overwrite a
file is not necessary anymore.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@34222 a592a061-630c-0410-9148-cb99ea01b6c8
Since Qt does not provide this, we have to roll our own dialog.
Hidden warnings are stored in sessions.
The dialog is currently only used in the case where an included file
has a different textclass then the master (bug 3218).
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@29324 a592a061-630c-0410-9148-cb99ea01b6c8