Is there anyone reading this mailing list that has faced the same (or similar) problem?
Il giorno gio, 28/04/2011 alle 15.28 +0200, Francesca Martelli ha scritto: > Thank you Jody, but I would like to draw directly on the screen, since > the point changes its coordinates frequently and if I create a feature > collection, each time I change the point, the entire map is repainted > causing a flickering effect. The application is a kind of GPS navigator: > there is a map (map context with a number of shapefile in UTM) and I > need to represent a moving vehicle. > > I have already tried to use the glass pane, but this does not solve the > problem since it is not possible to clear the glass pane, so old > positions remain painted over that. The only way I found for cleaning > the glass pane is to set visibility to false and to true again, but this > provokes flickering!!! > > So, I was looking for a different approach... > francesca > > > Il giorno gio, 28/04/2011 alle 23.15 +1000, Jody Garnett ha scritto: > > Perhaps you can define a feature collection (in memory) with your > > point; declare the correct coordinate reference system for your UTM > > zone (when you do this). > > > > > > And then add that FeatureCollection to the screen as a separate layer? > > > > > > There are a number of FeatureCollection implementations available for > > you to work with: > > -http://docs.geotools.org/latest/userguide/library/main/collection.html > > > > > > The indexed one is very fast to display (but not suitable for use if > > you are changing your point). > > > > > > Jody > > > > On Thu, Apr 28, 2011 at 10:52 PM, Francesca Martelli > > <[email protected]> wrote: > > Hi all, > > I have a problem with translation from utm coordinates in > > screen pixel > > position. I have already seen the tutorials (world2screen, > > data2world...), but examples reported there seem do not work > > in my case. > > > > I have a mapContext with shapefiles in a jmappane, and I would > > like to > > paint a point (with position expressed in UTM coordinates) > > over the map. > > > > Any help is greatly appreciated. > > Francesca > > > > > > -- > > Francesca Martelli, Computer Science Ph.D. > > Algorithms and Computational Mathematics Group, IIT - CNR, > > Pisa > > Phone: +39 050 315 3191 (office), +39 050 315 2333 (fax) > > http://www.iit.cnr.it/francesca.martelli/ > > email: [email protected] > > > > > > > > > > ------------------------------------------------------------------------------ > > 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 > > _______________________________________________ > > Geotools-gt2-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > > > > > -- Francesca Martelli, Computer Science Ph.D. Algorithms and Computational Mathematics Group, IIT - CNR, Pisa Phone: +39 050 315 3191 (office), +39 050 315 2333 (fax) http://www.iit.cnr.it/francesca.martelli/ email: [email protected] ------------------------------------------------------------------------------ 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 _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
