On 2009-06-16 16:21+0100 MaaTt wrote: > Dear all, > > I am totally new to plplot, so any advice is greatly appreciated. > Thank you all in advance (even reading the below) > > In brief, I am wondering if anyone can help me out by telling me > - why clearWidget crashes after pljoin is called; > - what plclear actually does;
Hi Matt: I just discovered today that the qt device had the sense of dev_clear reversed. From the plclear code in plpage.c, if the driver sets pls->dev_clear=1; then the device is called with PLESC_CLEAR to allow the device to handle plclear itself. Otherwise, ff the driver sets pls->dev_clear=0, then a PLplot core fallback is used (overwrite the page with the background colour) which seems perfectly fine to me as a way to simulate clearing the (sub-)page. Indeed, most drivers are content with this PLplot core fallback for clearing the page. Only the wxwidgets device handles PLESC_CLEAR at this time, and pls->dev_clear=0 for all other devices (usually by default) except for qt.cpp. That device inconsistently set pls->dev_clear=1 while not handling PLESC_CLEAR. I have now (revision 10056 in our svn trunk version) fixed that inconsistency bug by setting pls->dev_clear=0 throughout the qt device driver following what is done for most other device drivers. Will you please try the svn trunk version of Plplot to see if that solves your clear issues? You haven't yet replied to my suggestion of downloading a modern Qt4 version for your Linux platform. Does that suggestion solve the inconsistency you were getting between your Linux results with old Qt4 and your windows results with modern Qt4? 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 __________________________ ------------------------------------------------------------------------------ Are you an open source citizen? Join us for the Open Source Bridge conference! Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250. Need another reason to go? 24-hour hacker lounge. Register today! http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org _______________________________________________ Plplot-general mailing list Plplot-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-general
