The ability mentioned in the subject line is an unpublished PLplot feature that I have used recently for the -colorbar subset of C example 33. Since this is an unpublished feature (the documentation says plscolbg should be called before plinit), I have tried example 33 (using the -colorbar option) for a number of different devices. All the modern devices I have tried (xcairo, qt_widget, psc, wxwidgets, svg) work fine with the specified different background colour starting on the first page of the -colorbar pages (the fifth page of example 33 if the -colorbar example option is used), but -dev xwin (and -dev tk which uses -dev xwin code) do not work properly. For those devices the -colorbar pages of example 33 initially have black backgrounds rather than the specified (unsaturated green) background. However, you get the correct background if you resize the plot. Also, if you attempt to resize page 4 the initially correct black background for that page is turned into the background colour appropriate to page 5.
pladv(0) is largely equivalent to a call to pleop() followed by a call to plbop(). Thus, I suspect the trouble might be that -dev xwin handles end of page and beginning of page with a different style than the modern devices, e.g., by not setting the background colour properly at the correct place. Could somebody with knowledge of -dev xwin take a look to see if it can be brought into line with the style of modern devices with regard to page and background colour handling? The ability to set different background colours for different pages of a multi-page plot is well worth publicizing since the ability is quite useful, but I would like to hold off on changing the plscolbg documentation until we completely understand (and fix) why -dev xwin (and -dev tk) don't respond the same way as modern devices to a call to plscolbg (just before a call to pladv(0) in the example 33 case). So I hope somebody with knowledge of -dev xwin will take on this issue. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
