RE: NX client with root graphics

Hello Roland,

> For the dummies: am I using QtRoot if I've run configure with "--with-
> qt-incdir=/usr/lib/qt-3.3/include --with-qt-libdir=/usr/lib/qt-3.3/
> lib"? "root-config --has-qt" returns "yes".

 No, it is not ENOUGH !!!

> I'm asking because NX
> crashes reliably when starting our readout error monitoring software.
> The problem is that that's a complicated piece of code from which I
> cannot easily extract a portable snippet exhibiting the error :-(
>
> Anything else I could try?

The QtRoot is a ROOT plugin. This means it is not enough to compile and install the QtRoot layer. One has to change either the "$ROOTSYS/etc/system.rootrc" or provide the custom ".rootrc" file to set the proper plugin .

Eitehr file shoiudl contain the lines

Gui.Backend:                qt
Gui.Factory:                qt

Instead of the "standard"

Gui.Backend:                native
Gui.Factory:                native

See: ROOT User's Manual, ROOT / Qt Integration Interfaces ftp://root.cern.ch/root/doc/chapter27.pdf http://root.bnl.gov

To turn the Qt Extension one needs

Gui.Backend:                qt
Gui.Factory:                qtgui

  Yu are using the QtRoot if when start ROOT session you see the Qt-Root banner followed by the usual ROOT banner

> root.exe

** $Id: TGQt.cxx,v 1.2 2006/09/22 17:07:38 fine Exp $ this=0x9d078c0

• *
• W E L C O M E to R O O T *
• *
• Version 5.12/00c 18 August 2006 *
• *
• You are welcome to visit our Web site *
• http://root.cern.ch *
• *

  ---

Compiled on 18 August 2006 for linux with thread support.

CINT/ROOT C/C++ Interpreter version 5.16.13, June 8, 2006 Type ? for help. Commands must be C++ statements. Enclose multiple statements between { }. root.exe [0] .q

  Hope this helps,
  My best regards, Valeri

>
> Thanks,
> Roland
>
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Received on Wed Oct 04 2006 - 21:47:53 MEST