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Cross-Platform Qt-Based Implementation of Low Level GUI Layer of ROOT

Cross-Platform Qt-Based Implementation of Low Level GUI Layer of ROOT. V.Fine BNL, Upton. Why ROOT is multi-platform ?. Just to be healthy ! Just because there are plenty of Windows users around. ROOT for different platforms http://root.cern.ch/root/images/ftpstats.gif.

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Cross-Platform Qt-Based Implementation of Low Level GUI Layer of ROOT

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  1. Cross-Platform Qt-Based Implementation of Low Level GUI Layer of ROOT V.Fine BNL, Upton fine@bnl.gov ACAT2002, Moscow

  2. Why ROOT is multi-platform ? • Just to be healthy ! • Just because there are plenty of Windows users around fine@bnl.gov ACAT2002, Moscow

  3. ROOT for different platformshttp://root.cern.ch/root/images/ftpstats.gif fine@bnl.gov ACAT2002, Moscow

  4. ROOT low level GUI interface ROOT (TVirtualPad) ROOT (TG<family> 3 different implementations to develop and support TVirtualX TGWIN32 TGX11 TGWin32GDK fine@bnl.gov ACAT2002, Moscow

  5. ROOT Qt-based GUI interface ROOT ROOT TVirtualX only one (!) implementation TQt fine@bnl.gov ACAT2002, Moscow

  6. What is Qt fine@bnl.gov ACAT2002, Moscow

  7. Why Qt ? It does what it promises ! Myself have been confused no time with Qt documentation and functionality But it is not my (ROOT user) business to make the ROOT team life more easy. The plain implementation of TVirtualX that doesn’t bring any new feature can not justify the efforts to introduce a new extra layer and external dependency of the ROOT package fine@bnl.gov ACAT2002, Moscow

  8. (ROOT + Qt) based applications The question is: “How easy can one create a complex application that uses ROOT to do what only ROOT can provide (namely the features coming from the built-in C++ interpreter) and use Qt to create cross-platform GUI ? ” fine@bnl.gov ACAT2002, Moscow

  9. libQtgui library • Qt-based ROOT consists of a standard ROOT installation with the addition of two additional shared libraries • The libQtGui library contains implementations of abstract interfaces provided by the TGuiFactory ROOT class: • TCanvasImp • TBrowserImp • TContextMenuImp • TControlBarImp • TInspectorImp 0.5 day to implement 1 day to implement ! 2 days to implement fine@bnl.gov ACAT2002, Moscow

  10. Qt designer to create ROOT embedded canvases fine@bnl.gov ACAT2002, Moscow

  11. A test application to combine ROOT and Qt Widget fine@bnl.gov ACAT2002, Moscow

  12. Where to get Qt-ROOT from fine@bnl.gov ACAT2002, Moscow

  13. Qt-ROOT FAQ fine@bnl.gov ACAT2002, Moscow

  14. Qt-ROOT CVS • The source code is available via CVS repository as well. • To check out the sources, you need to be running CVS 1.10 or later (check by doing cvs -v), and have your $CVSROOT set to • :pserver:cvs@usatlas.org:/rootbnl/cvs • The password for user cvs is cvs. • Two cvs commands will do the job: • cvs -d :pserver:cvs@usatlas.org:/rootbnl/cvs login • cvs -d :pserver:cvs@usatlas.org:/rootbnl/cvs co root • AFS access will be provided also. fine@bnl.gov ACAT2002, Moscow

  15. Conclusion There are enough evidences the present approach allows the ROOT developers as well as ROOT users to work with code that has no X11/WIN32 graphics subsystem dependencies and at the same time opens unrestricted access to a rich set of ready-to-use commercial and free GUI Qt-based widgets. The Qt-based version was tested on Unix and Windows. fine@bnl.gov ACAT2002, Moscow

  16. Thank you • Special thanks: • Torre Wenaus, Yuri Fisyak, Victor Perevoztchikov • Anton Fokin • Christian Holm Christensen • ROOT team • ROOT folks from ROOTTALK fine@bnl.gov ACAT2002, Moscow

  17. 0. Long lasting application No penalty 1. Very wide used on Linux system (KDE) 2. Shipped with the source code and installation script (no technical to take over but legal issue). 1. What is accepted level: 1. one pixel was that reliable level 2. dialog window is a mandatory attibute of any system ROOT is designed like we 20 years ago 2. Qt - quality library of Widget weel-though separation of the automaically generated GUI and user-provided custom actions. (Tha tallow to share GUI across applications) 3. Functionality: They treat MS a GUI standard 3. What ROOT may end up with. The best scenario we will ned up with somethin Qt alike but in many years. 4. Price: 1. Free for non-commercial applcation on X11 platform 2. True cross platform (code designed and debugged on with free UNIX will work in Windows 3. This allow to minimiz the number of Windows license 4. Windows license is really cheap anyway (acad. price $700/developer) our experiecne did prove this worth to buy. It is much faster and better to create GUI with Qt rather struggle with TG<classes> 4.1. Lack of documentation 4.2. Lack of functionality 5 License. Qt 2. restrictive Qt 3. can be accepted fine@bnl.gov ACAT2002, Moscow

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