trigger MapMode ScaleX change in writer

[Caolán McNamara]

On Wed, 2022-05-25 at 21:42 +0800, Mark Hung wrote:
> here is another precondition: OutputDevice must be a printer (bPrt
> ==true)

I think this requires that "Use printer metrics for document
formatting" is enabled to get to this path (tools, options, writer,
compatibility) which I think is "PrinterIndependantLayout" of
"disabled" in the config setting in the file format.

If I create a new document, enable that "use printer metrics", add some
text and then use the "file, print" dialog and I get a hit of bPrt of
true. If you can reproduce the same I think that backtrace is valuable
to you to attempt a test, e.g. PrintOrPDFExport(pOut, ...) where I see
pOut->GetOutDevType() is OUTPUT_PRINTER (unotxdoc.cxx:2962) so I'd
guess something like

a doc with "use printer metrics" enabled
ScopedVclPtrInstance<Printer> printer,
SwViewShell::PrintOrPDFExport(printer, ...
might get you where you want to go