make many methods virtual to allow custmization in derived classes. Proposed by Mathieu for vertical menus.
make many methods virtual to allow custmization in derived classes. Proposed
by Mathieu for vertical menus.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@4625 27541ba8-7e3a-0410-8455-c3a389f83636

zzxuanyuan/root-compressor-dummy,Duraznos/root,zzxuanyuan/root,tc3t/qoot,bbockelm/root,alexschlueter/cern-root,zzxuanyuan/root,mkret2/root,0x0all/ROOT,pspe/root,satyarth934/root,sawenzel/root,satyarth934/root,omazapa/root,mattkretz/root,zzxuanyuan/root-compressor-dummy,esakellari/my_root_for_test,kirbyherm/root-r-tools,vukasinmilosevic/root,BerserkerTroll/root,esakellari/root,BerserkerTroll/root,mkret2/root,davidlt/root,georgtroska/root,esakellari/root,buuck/root,dfunke/root,BerserkerTroll/root,olifre/root,sawenzel/root,davidlt/root,jrtomps/root,agarciamontoro/root,perovic/root,veprbl/root,Duraznos/root,Duraznos/root,abhinavmoudgil95/root,satyarth934/root,root-mirror/root,veprbl/root,krafczyk/root,jrtomps/root,lgiommi/root,Y--/root,thomaskeck/root,sirinath/root,lgiommi/root,buuck/root,satyarth934/root,Duraznos/root,jrtomps/root,bbockelm/root,nilqed/root,mkret2/root,smarinac/root,beniz/root,ffurano/root5,jrtomps/root,olifre/root,esakellari/root,simonpf/root,agarciamontoro/root,krafczyk/root,cxx-hep/root-cern,krafczyk/root,bbockelm/root,BerserkerTroll/root,arch1tect0r/root,ffurano/root5,esakellari/root,mattkretz/root,evgeny-boger/root,omazapa/root-old,sirinath/root,tc3t/qoot,abhinavmoudgil95/root,sawenzel/root,agarciamontoro/root,beniz/root,buuck/root,CristinaCristescu/root,veprbl/root,karies/root,buuck/root,mhuwiler/rootauto,perovic/root,sbinet/cxx-root,BerserkerTroll/root,esakellari/root,simonpf/root,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,root-mirror/root,gbitzes/root,omazapa/root,omazapa/root,evgeny-boger/root,esakellari/root,esakellari/my_root_for_test,jrtomps/root,mattkretz/root,veprbl/root,omazapa/root-old,nilqed/root,pspe/root,olifre/root,georgtroska/root,esakellari/root,ffurano/root5,CristinaCristescu/root,krafczyk/root,krafczyk/root,mhuwiler/rootauto,alexschlueter/cern-root,gbitzes/root,ffurano/root5,vukasinmilosevic/root,krafczyk/root,pspe/root,karies/root,0x0all/ROOT,mkret2/root,dfunke/root,karies/root,esakellari/my_root_for_test,esakellari/root,olifre/root,pspe/root,Dr15Jones/root,arch1tect0r/root,kirbyherm/root-r-tools,gganis/root,bbockelm/root,smarinac/root,sawenzel/root,dfunke/root,tc3t/qoot,Dr15Jones/root,davidlt/root,alexschlueter/cern-root,agarciamontoro/root,zzxuanyuan/root,perovic/root,buuck/root,dfunke/root,thomaskeck/root,vukasinmilosevic/root,omazapa/root,gganis/root,zzxuanyuan/root,nilqed/root,agarciamontoro/root,abhinavmoudgil95/root,karies/root,CristinaCristescu/root,Y--/root,olifre/root,simonpf/root,sbinet/cxx-root,tc3t/qoot,dfunke/root,veprbl/root,krafczyk/root,dfunke/root,pspe/root,zzxuanyuan/root-compressor-dummy,cxx-hep/root-cern,zzxuanyuan/root-compressor-dummy,lgiommi/root,CristinaCristescu/root,Y--/root,root-mirror/root,jrtomps/root,cxx-hep/root-cern,esakellari/my_root_for_test,vukasinmilosevic/root,abhinavmoudgil95/root,BerserkerTroll/root,omazapa/root-old,vukasinmilosevic/root,kirbyherm/root-r-tools,simonpf/root,arch1tect0r/root,strykejern/TTreeReader,nilqed/root,gbitzes/root,omazapa/root,zzxuanyuan/root,zzxuanyuan/root,gbitzes/root,olifre/root,simonpf/root,bbockelm/root,gbitzes/root,strykejern/TTreeReader,esakellari/my_root_for_test,evgeny-boger/root,dfunke/root,thomaskeck/root,olifre/root,CristinaCristescu/root,Y--/root,beniz/root,mattkretz/root,omazapa/root,georgtroska/root,sawenzel/root,0x0all/ROOT,perovic/root,simonpf/root,beniz/root,sbinet/cxx-root,jrtomps/root,smarinac/root,pspe/root,CristinaCristescu/root,smarinac/root,olifre/root,davidlt/root,zzxuanyuan/root,abhinavmoudgil95/root,sawenzel/root,vukasinmilosevic/root,jrtomps/root,sirinath/root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,buuck/root,evgeny-boger/root,beniz/root,nilqed/root,sbinet/cxx-root,sirinath/root,smarinac/root,sbinet/cxx-root,Duraznos/root,bbockelm/root,karies/root,zzxuanyuan/root-compressor-dummy,pspe/root,mhuwiler/rootauto,zzxuanyuan/root,abhinavmoudgil95/root,evgeny-boger/root,arch1tect0r/root,ffurano/root5,veprbl/root,pspe/root,buuck/root,krafczyk/root,ffurano/root5,mhuwiler/rootauto,sirinath/root,abhinavmoudgil95/root,smarinac/root,kirbyherm/root-r-tools,strykejern/TTreeReader,lgiommi/root,sbinet/cxx-root,esakellari/root,root-mirror/root,omazapa/root,tc3t/qoot,tc3t/qoot,arch1tect0r/root,Dr15Jones/root,bbockelm/root,cxx-hep/root-cern,nilqed/root,evgeny-boger/root,davidlt/root,davidlt/root,beniz/root,gganis/root,strykejern/TTreeReader,arch1tect0r/root,mattkretz/root,arch1tect0r/root,sirinath/root,omazapa/root-old,davidlt/root,olifre/root,pspe/root,satyarth934/root,zzxuanyuan/root,root-mirror/root,gbitzes/root,nilqed/root,BerserkerTroll/root,sirinath/root,karies/root,krafczyk/root,nilqed/root,root-mirror/root,Duraznos/root,pspe/root,lgiommi/root,ffurano/root5,alexschlueter/cern-root,esakellari/root,abhinavmoudgil95/root,omazapa/root-old,zzxuanyuan/root-compressor-dummy,omazapa/root-old,zzxuanyuan/root-compressor-dummy,perovic/root,zzxuanyuan/root,beniz/root,lgiommi/root,root-mirror/root,agarciamontoro/root,karies/root,cxx-hep/root-cern,gganis/root,thomaskeck/root,beniz/root,georgtroska/root,0x0all/ROOT,CristinaCristescu/root,georgtroska/root,sawenzel/root,karies/root,tc3t/qoot,davidlt/root,sbinet/cxx-root,mkret2/root,cxx-hep/root-cern,Y--/root,gganis/root,BerserkerTroll/root,esakellari/my_root_for_test,lgiommi/root,omazapa/root,georgtroska/root,strykejern/TTreeReader,omazapa/root,mkret2/root,sawenzel/root,simonpf/root,sbinet/cxx-root,gganis/root,kirbyherm/root-r-tools,BerserkerTroll/root,dfunke/root,cxx-hep/root-cern,esakellari/my_root_for_test,satyarth934/root,tc3t/qoot,alexschlueter/cern-root,thomaskeck/root,buuck/root,satyarth934/root,zzxuanyuan/root,omazapa/root,evgeny-boger/root,nilqed/root,simonpf/root,abhinavmoudgil95/root,abhinavmoudgil95/root,agarciamontoro/root,bbockelm/root,zzxuanyuan/root,lgiommi/root,omazapa/root-old,veprbl/root,mattkretz/root,beniz/root,sbinet/cxx-root,CristinaCristescu/root,olifre/root,davidlt/root,krafczyk/root,georgtroska/root,nilqed/root,gbitzes/root,Duraznos/root,gganis/root,simonpf/root,sbinet/cxx-root,gganis/root,gbitzes/root,evgeny-boger/root,thomaskeck/root,arch1tect0r/root,krafczyk/root,smarinac/root,Dr15Jones/root,veprbl/root,buuck/root,Duraznos/root,thomaskeck/root,agarciamontoro/root,mhuwiler/rootauto,Duraznos/root,mattkretz/root,0x0all/ROOT,vukasinmilosevic/root,Y--/root,satyarth934/root,jrtomps/root,mkret2/root,0x0all/ROOT,perovic/root,mkret2/root,omazapa/root-old,esakellari/my_root_for_test,Duraznos/root,gbitzes/root,gganis/root,mhuwiler/rootauto,vukasinmilosevic/root,simonpf/root,tc3t/qoot,alexschlueter/cern-root,dfunke/root,georgtroska/root,olifre/root,arch1tect0r/root,buuck/root,Dr15Jones/root,perovic/root,CristinaCristescu/root,sbinet/cxx-root,smarinac/root,Y--/root,sawenzel/root,evgeny-boger/root,perovic/root,agarciamontoro/root,gganis/root,sirinath/root,mattkretz/root,CristinaCristescu/root,pspe/root,vukasinmilosevic/root,thomaskeck/root,lgiommi/root,beniz/root,alexschlueter/cern-root,nilqed/root,bbockelm/root,perovic/root,agarciamontoro/root,smarinac/root,mhuwiler/rootauto,mattkretz/root,gbitzes/root,mkret2/root,bbockelm/root,strykejern/TTreeReader,simonpf/root,karies/root,omazapa/root,karies/root,mhuwiler/rootauto,Dr15Jones/root,omazapa/root-old,davidlt/root,omazapa/root-old,jrtomps/root,veprbl/root,Y--/root,thomaskeck/root,root-mirror/root,Duraznos/root,perovic/root,vukasinmilosevic/root,esakellari/my_root_for_test,kirbyherm/root-r-tools,davidlt/root,georgtroska/root,sawenzel/root,lgiommi/root,root-mirror/root,arch1tect0r/root,lgiommi/root,mhuwiler/rootauto,esakellari/my_root_for_test,root-mirror/root,root-mirror/root,mhuwiler/rootauto,karies/root,gganis/root,satyarth934/root,beniz/root,bbockelm/root,omazapa/root-old,smarinac/root,Dr15Jones/root,Y--/root,evgeny-boger/root,kirbyherm/root-r-tools,thomaskeck/root,satyarth934/root,sirinath/root,evgeny-boger/root,BerserkerTroll/root,sirinath/root,agarciamontoro/root,BerserkerTroll/root,0x0all/ROOT,0x0all/ROOT,tc3t/qoot,mkret2/root,Y--/root,CristinaCristescu/root,strykejern/TTreeReader,cxx-hep/root-cern,dfunke/root,georgtroska/root,jrtomps/root,arch1tect0r/root,zzxuanyuan/root-compressor-dummy,sawenzel/root,Y--/root,buuck/root,vukasinmilosevic/root,mattkretz/root,mattkretz/root,satyarth934/root,mkret2/root,georgtroska/root,veprbl/root,perovic/root,esakellari/root,dfunke/root,sirinath/root,mhuwiler/rootauto,veprbl/root,gbitzes/root,0x0all/ROOT