Hi, recently I started to use the wxCode component wxFreeChart due to requirements of one of my projects to display x-y-charts for series of curves.
I have several issues in using wxFreeChart and I hope someone might be able to give some advice. 1) I was able to compile wxFreeChart as a static library but when I try to compile it as a DLL (which is necessary for my project) I get tons of warning messages from Visual C++ 2008/2010 like the following: wxCode\components\freechart\include\wx/drawobject.h(46) : warning C4251: 'Observable<O>::OIt': class 'std::_Vector_iterator<_Ty,_Alloc>' needs to have a DLL interface to be used by clients of class 'Observable<O>' with [ O=DrawObserver ] and [ _Ty=DrawObserver *, _Alloc=std::allocator<DrawObserver *> ] and [ O=DrawObserver ] Although these are "only" warnings and the resulting demo application seems to work (except the dynamic X-Y sample which crashes) I would like to get rid of those warnings since I fear there might be situations where not resolving this might impose problems. 2) At least in the VC++ project files coming with wxFreeChart there are some missing pieces: one has to add the AUI link library for the component itself and the ADV link library for the sample application. Additionally it seems not to be possible to generate a static library for wxFreeChart based on wxWidgets DLLs (although this option can be selected from the build configurations it doesn't work) 3) I plan to produce charts by wxFreeChart and to add them to PDF reports generated based on my own wxCode component wxPdfDocument. In principle I got it to work using my wxPdfDC class but I have problems to display smooth curves. If I use too few data points I see edges in the curve, if I use too many data points I see a very jagged curve. I think this is a problem with all wxDC based classes since they are pixel oriented. Nevertheless it might be possible to get smoother curves by using splines instead of simple lines to connect the data points. How could I accomplish this? Should I create a new XYRenderer? 4) I need to create a X-Y chart with 2 different y-axes where one axis shows the values in degree Celsius and the other in degree Fahrenheit. The problem is that I get crooked values for the axis annotation. For example if I have an axis for Celsius with a range from 20 to 35 degrees I get good annotations for the Celsius axis (namely 20, 25, 30, 35) but for the Fahrenheit axis I get 68, 77, 86, 95, but I would like to get shifted ticks and annotations (i.e. ticks marked with 70, 80 and 90). Is this possible somehow? Or would I have to create a specialized axis class for that purpose? 5) Are there plans to create a version of wxFreeChart based on wxGraphicsContext instead of wxDC? For vector oriented output devices this would be probably a lot better. I myself plan to implement a wxPdfGraphicsContext. Regards, Ulrich ------------------------------------------------------------------------------ RSA® Conference 2012 Save $700 by Nov 18 Register now! http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ wxCode-users mailing list wxCode-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wxcode-users