Hi Hans and Alan, On Mon, 2009-01-19 at 10:19 -0800, Alan W. Irwin wrote: > On 2009-01-19 14:41+0100 hans.rijn...@shell.com wrote: > > > Dear all, > > > > This issue was nicely resolved for the xwin driver onn Linux, but now we > > face the similar behaviour on Window (Vista 64) using the wxwidgets driver. > > > > PlPlot was installed with the pthreads option on (pthreads library from > > gnu), but as soon as you enter the obscured window again, the window title > > shows "not responding" and hence no refresh. > > > > Do we forget something ?
I didn't know, that the pthreads library works on Windows. But apart from that, the wxWidgets driver does not support multi threading at the moment - it works completely single threaded. Although it behaves a little like a mt app, since you can see the driver drawing the plot, but this is since the driver continuously calls the wxWidgets main loop routine, do some drawing and leave immediately the loop again. A plend() call will allow the wxWidgets driver to take over and do the updating of the screen if necessary. If you really need multi-threading this will become a little complicated, but if e.g. you only need the plot screen being updated if it was hidden, etc. and no menu action and so on, it's actually possible to use an internal function of the wxWidgets driver (wxApp::Run() I think) on a regularly basis. In case there are some Events pending (e.g. "Screen needs repaint") then this events will be processed and if the application goes "idle" it returns, which would allow your application to progress. If you manage to call the driver a number of times a second this would be as good as a multi threaded driver. I could have a look on how the xwin driver is doing the pthread stuff and if not that hard I could try to implement it, but that isn't something which I can do in the next days. Would the way I described above be a solution for you? Btw, no driver which works on Windows has pthread support. > > I am now wondering if there is a thread issue for windows or for -dev > wxwidgets? To help resolve that question, are you satisfied with the > threading behaviour of -dev wxwidgets on Linux? In Linux there is also no pthread support of the wxWidgets driver. Regards, Werner > > 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 > __________________________ > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > SourcForge Community > SourceForge wants to tell your story. > http://p.sf.net/sfu/sf-spreadtheword > _______________________________________________ > Plplot-general mailing list > Plplot-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/plplot-general -- Dr. Werner Smekal Institut fuer Allgemeine Physik Technische Universitaet Wien Wiedner Hauptstr 8-10 A-1040 Wien Austria email: sme...@iap.tuwien.ac.at web: http://www.iap.tuwien.ac.at/~smekal phone: +43-(0)1-58801-13463 (office) +43-(0)1-58801-13469 (laboratory) fax: +43-(0)1-58801-13499 ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Plplot-general mailing list Plplot-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-general
