Hi Rooters, When I execute the following code it gives me error message: root [0] .x aticdemos.C Error: Can't call TControlBar::TControlBar() in current scope FILE:/export/data/aticd1/jay1/ROOT/jay/track-cint/mmi/./aticdemos.C LINE:4 Warning: Undeclared data member bar1 FILE:/export/data/aticd1/jay1/ROOT/jay/track-cint/mmi/./aticdemos.C LINE:4 *** Interpreter error recovered *** My code is(aticdemos.C): { gROOT->Reset(); // gROOT->Reset("a"); It does NOT work. bar = new TControlBar("vertical","main menu"); bar1 = new TControlBar("horizontal","Tracking","Tracking Incident X(Y) Position"); bar->AddButton("Utility",".L utility.C", "Load utility functions first"); bar->AddButton("Total Ed",".x toted.C", "Plot 1D histogram of total energy deposit"); bar->AddButton("Start!",".x start.C", "Read 1st event from aticdata.root"); bar->AddButton("Event++",".x nextevent.C", "Next Event read"); bar->AddButton("Which Event?",".x whichevent.C", "A Selected Event read"); bar->AddControlBar(bar1); bar->AddButton("HITS-DISPLAY",".x evdisp.C", "DISPLAY HITS"); bar->AddButton("Quit!",".q", "Exit from ROOT"); bar1->AddButton("Calculation",".x track.C","Calculating Incident X(Y) Position"); bar1->AddButton("DISP-Y BGO",".x disp_y_bgo.C","Display Y-BGO & Tracking"); bar1->AddButton("DISP-X BGO",".x disp_x_bgo.C","Display X-BGO & Tracking"); bar1->AddButton("DISP-Y SCN",".x disp_y_scn.C","Display Y-SCN & Tracking"); bar1->AddButton("DISP-X SCN",".x disp_x_scn.C","Display X-SCN & Tracking"); bar1->AddButton("DISP-SI HITS",".x disp_si_hits.C","Display SI HITS"); bar->Show(); gROOT->SaveContext(); } Do you have any idea about it? I cannot use TControlbar under TControlbar ? --- Thannks in advance. Jayoung
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