I have managed to attach my filename to my print out by overloading the wxPrintout constructor with my chosen name.
wxPrintout(const wxString& title = wxT("Printout"));
In my code:
VRPrintout::VRPrintout(blababala):wxPrintout(_("Heartrate")),
But on printing to save as a PDF, in the filename dialog, it reads "Printing Heartrate".
How can I get rid of "Printing" added before the name or even change it?