We're finding that we have to programmatically increase the pen width of all of the curves within our plot DURING PRINTING (to PDF or an actual printer) by a factor of about 20 -- and then restore the normal pen widths for screen display -- in order for those curves to show up in the printed output with anything more than a hairline width. It looks like the rendering algorithm for screen and print output are the same, with no special provision to re-scale curve line thickness for the much higher resolution of print output.

This is with Qwt 5.2.3. See the accompanying image. Are we missing something? And does Qwt 6.1 (effectively) support curve pen width rescaling for printing?


Thank you in advance,
Phil Weinstein, CADSWES