Hi Eric,
This problem with the TH1 default constructor is now protected in the CVS
version.
In your case a possible workaround is to do
CInheritTH2 ih;
ih.UseCurrentStyle();
Rene Brun
"ANCIANT E." wrote:
>
> Hello rooters,
> I am using root 3.10.02 + GDK on Microsoft Visual C++ 6
>
> I have a class that inherits from TH2D, when I try to draw it using
> "lego" option, instead of getting full lego-bars, I got thin lego
> (sometimes "lines", sometimes nothings it depends of the order of call
> of the various options) (see attached c1.ps )
>
> If I draw it using "box" option I obtain and empty histogram display.
> (although using the Event Status Option one can verify that bins are not
> empty)
>
> I haven't managed to find out what initialisation of histogram I am
> missing to have them be drawn correctly with "box" and "lego" ,
> apparently TH2D::TH2D() + TH2::TH2() + TH1():TH1() + SetBins(...) don't
> make it...
>
> eric
>
> ----------FILE CInheritTH2.h :
>
> #ifndef CINHERIT_H
> #define CINHERIT_H
>
> #include "TH2.h"
>
> #ifdef __CINT__
> class CInheritTH2 : public TH2D {
> #else
> class __declspec(dllexport) CInheritTH2 : public TH2D {
> #endif
>
> //
> public :
>
> ClassDef(CInheritTH2,0)
>
> };
>
> #endif
>
> -----------FILE CInheritTH2.cpp :
>
> #include "CInheritTH2.h"
>
> ClassImp(CInheritTH2)
>
> --------
> dictionary was generated without major problem :
>
> --------------------Configuration: InheritTH2 - Win32
> Debug--------------------
> Building Root dictionnary
> Compiling...
> Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for
> 80x86
> Copyright (C) Microsoft Corp 1984-1998. All rights reserved.
> cl /G5 /MTd /W3 /GR /GX /ZI /Od /I "../InheritTH2" /D
> "INHERITTH2_EXPORTS" /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D
> "VISUAL_CPLUSPLUS" /D _X86_=1 /D "_DLL" /Fo"Debug/" /Fd"Debug/" /FD /GZ
> /c
> "P:\ Simu\InheritTH2\InheritTH2Dict.cxx"
> "P:\ Simu\InheritTH2\CInheritTH2.cpp"
> InheritTH2Dict.cxx
> p:\simu\inheritth2\cinheritth2.h(9) : warning C4275: non dll-interface
> class 'TH2D' used as base for dll-interface class 'CInheritTH2'
> p:\root_v3.10.02.win32gdk_debug\include\th2.h(265) : see
> declaration of 'TH2D'
> CInheritTH2.cpp
> p:\simu\inheritth2\cinheritth2.h(9) : warning C4275: non dll-interface
> class 'TH2D' used as base for dll-interface class 'CInheritTH2'
> p:\root_v3.10.02.win32gdk_debug\include\th2.h(265) : see
> declaration of 'TH2D'
> Generating Code...
> Linking...
> Microsoft (R) Incremental Linker Version 6.00.8447
> Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
> kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib
> shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib
> msvcrt.lib p:\root_v3.10.02.win32gdk_Debug\lib\*.lib /dll /pdb:none
> /debug /debugtype:both /machine:I386 "/o
> ut:../Debug/InheritTH2.dll" "/implib:../Debug/InheritTH2.lib"
> /subsystem:console,4.0
> .\Debug\InheritTH2Dict.obj
> .\Debug\CInheritTH2.obj
> Creating library ../Debug/InheritTH2.lib and object
> ../Debug/InheritTH2.exp
> LINK : warning LNK4098: defaultlib "LIBCMTD" conflicts with use of other
> libs; use /NODEFAULTLIB:library
>
> InheritTH2.dll - 0 error(s), 3 warning(s)
>
> -----------Now if I use the class from CiNT :
>
> *******************************************
> * *
> * W E L C O M E to R O O T *
> * *
> * Version 3.10/02 17 December 2003 *
> * *
> * You are welcome to visit our Web site *
> * http://root.cern.ch *
> * *
> *******************************************
>
> Compiled for win32gdk.
>
> CINT/ROOT C/C++ Interpreter version 5.15.115, Dec 9 2003
> Type ? for help. Commands must be C++ statements.
> Enclose multiple statements between { }.
> root [0] gSystem->Load("p:/simu/debug/InheritTH2.dll")
> (int)0
> root [1] CInheritTH2 ih
> root [2] ih.SetBins(10,0,10,10,0,10)
> root [4] ih.Fill(5,5)
> (Int_t)78
> root [6] ih.Draw("lego")
> <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
> root [7]
>
> I obtained the strange attached display
>
> ********
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> --------------------------------------------------------------------------------
> Name: c1.ps
> c1.ps Type: Postscript Document (application/postscript)
> Encoding: base64
> Description: c1.ps
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