Hi Phil: In response to your remarks on the bug tracker for bug 173, I would like to discuss this a bit more on plplot-devel with you, and once I get a full education on this wxwidgets gradient subject from you I might add a further comment to bug 173 on the bug tracker for future reference (if anybody brings up this subject again).
Apparently the wxDC class (documented at <http://docs.wxwidgets.org/3.1/classwx_d_c.html>) supports arbitrary affine transformations (including rotations) now. So it seems to me that rotation of results from wxDC::GradientFillLinear could be used to provide at least an arbitrarily rotated rectangular gradient result to plgradient. That still leave the problem of dealing with the more general case where the gradient was required for a non-rectangular (arbitrary) polygon, but could that be handled by natively masking the (possibly rotated) rectangular area with that polygon? Or is such native masking not available with the wxDC class? Another possibility is wxGraphicsContext::CreateLinearGradientBrush (documented at <http://docs.wxwidgets.org/3.1/classwx_graphics_context.html>). I don't understand how such a gradient brush would be applied, but apparently there are no rectangular restrictions on it. Or is this possibility completely shot down because the new wxwidgets code only inherits from wxDC and not wxGraphicsContext so we have no access to the CreateLinearGradientBrush method? My final question is a general C++ one. What syntax do I need to look for to tell what wxWidgets library classes we inherit from? I am pretty sure, for example that class wxPLDevice : public PlDevice means our wxPLDevice class inherits from our PLDevice class. But I cannot find any equivalent syntax for what wxWidgets library classes (such as wxDC or wxGraphicsContext above) we inherit from. I would appreciate an answer to this question since that should allow me to always know in the future exactly what wxWidgets library methods are available to us. 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); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.sf.net); 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 __________________________ ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
