When printing an AdvStringGrid to a PDF printer it doesn't properly handle the cancelation of the PDF filename dialog

VCL TMS VCL UI Pack
1

TAdvStringGrid.PrivatePrintRect assumes that printing has started as soon as Printer.BeginDoc has been called.
But if a PDF printer is used (set as system's default), Printer.BeginDoc will lead to a filename dialog showing up, at first.
If that dialog gets cancelled by the user, TAdvStringGrid.PrivatePrintRect continues anyway and an EPrinter exception "Printer is not printing" is thrown in VCL.Printers as a result.

Instead we would expect that printing is just cancelled silently, without an exception.

TPrinter.BeginDoc resets its printing flag/property FPrinting, if the dialog has been cancelled. So probably the flag just needs to be checked another time, after calling BeginDoc.

2

Thanks for reporting. We applied an improvement that will be included in the next update.