Hi, I thought R_G_B system worked only with the plugin, but the plugin is only needed to pick-up colors from the UI. The code to render colors from R_G_B attribute has been added by Pepe in the BasicStyle code (which, IMHO, is fine).
The idea of a style able to render a polygon layer with four colors is a nice idea. The four color theorem has been so hard to prove that I doubt that the implementation of such a plugin is an easy task, but it would be an interesting theme for a student or any person with a good mathematical (graph) knowledge. Michaël > Hi, > > R_G_B system works only with Color chooser plugin which comes with OpenJUMP > Plus. Perhaps that plugin could be modified to give random fills for the > selected polygons. > > Here comes another idea. Sometimes it would be nice to have polygon maps > where adjacent polygons have different colors according to the four color > theorem. Or seven colors it that would be easier to compute. That feature > would also suit well as an option for Color chooser plugin. > http://en.wikipedia.org/wiki/Four_color_theorem<http://en.wikipedia.org/wiki/Four_color_theorem.> > http://people.math.gatech.edu/~thomas/FC/fourcolor.html > http://146.163.152.131/teaching/projects/poettker_final.pdf > > -Jukka Rahkonen- > > > ________________________________ > Michaël Michaud wrote: > > Hi, > I need to change the color of the selected data. > Can anyone help me to find in which class or which method that changes colors > and give the selected data a specefic or random color different from the old > one. > thanks in advance. >> Do you want to "show" selected features, and give them back the original >> color if >> the selection change or do you want to apply the new color permanently ? >> In the first case, you just have to "select" features so that they appear >> with the >> thick yellow* border line. Use the SelectionManager and FeatureSelection >> classes >> *Can be change from the options >> In the second case, you'll have to use an attribute to store the >> color information (which means you have to modify or prepare the >> schema for that) >> You can either put semantic information in the attribute then apply >> a ColorThemingStyle (which may be a bit tricky) >> or, more simple, add a "R_G_B" attribute and store colors as >> RRVVBB hexadecimal values. >> Michaël > > > -- > *Asma OUQALLI* > > Élève ingénieur : 3ème Sciences d'Information Géographique (SIG). > Chef de commission développement professionnel - Rotaract EHTP. > Chef de cellule Media - Olympiades EHTP 2012. > Ecole Hassania des Travaux Publics. > Mobile : +212 672 48 23 15. > Email : asma.ouqa...@gmail.com<mailto:asma.ouqa...@gmail.com> > > > > > ------------------------------------------------------------------------------ > Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester > Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the > endpoint security space. For insight on selecting the right partner to > tackle endpoint security challenges, access the full report. > http://p.sf.net/sfu/symantec-dev2dev > > > > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net<mailto:Jump-pilot-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > > ------------------------------------------------------------------------------ > Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester > Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the > endpoint security space. For insight on selecting the right partner to > tackle endpoint security challenges, access the full report. > http://p.sf.net/sfu/symantec-dev2dev > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
