I have been trying to get experience in using ROOT Gui classes using available examples. I have been doing this with ROOT 3.05/03 under RH Linux 9.0 and gcc 3.2.2. While running the example provided by Fons (http://root.cern.ch/root/hepvis98/newgui.html) under the debugger I noticed difference after changing the parameters in the line MyMainFrame mainWin(gClient->GetRoot(), 200, 220); in file main.cxx. When I change this line into MyMainFrame mainWin(gClient->GetRoot(), 200, 100); recompile all three files, set a breakpoint on this line, and step line by line I get the following output Breakpoint 1, main (argc=1, argv=0xbffff2b4) at main.cxx:12 12 MyMainFrame mainWin(gClient->GetRoot(), 200, 100); (gdb) s 0x0804b731 in TGClient::GetRoot() const (this=0x881d488) (gdb) s Single stepping until exit from function _ZNK8TGClient7GetRootEv, which has no line number information. MyMainFrame (this=0xbffff160, p=0x88267f0, w=200, h=100) at MyMainFrame.cxx:8 When using the original values 200, 220 I am not getting this message. Thank you and best regards, Michal
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