RE: ruby with root + qt

Hello Robert,  

>From your other post http://root.cern.ch/root/roottalk/roottalk09/0691.html

I learned http://pastie.org/558537 your way to build ROOT:  

./configure --prefix=/usr/local --enable-ruby --enable-python --enable-explicitlink --enable-gsl-shared --enable-rpath  

It indicates that you do not build the Qt-layer due lack of the optional "--enable-qt" build parameters. That means you should do that first.
The recommended way is http://root.bnl.gov/QtRoot/How2Install4Unix.html#complement <http://root.bnl.gov/QtRoot/How2Install4Unix.html#complement> Hope this helps, Valeri

From: Riemann, Robert [mailto:robert.riemann_at_physik.hu-berlin.de] Sent: Thu 7/23/2009 2:34 PM
To: Fine, Valeri
Cc: roottalk_at_root.cern.ch; Zoltan.Mathe_at_ucdconnect.ie Subject: Re: [ROOT] ruby with root + qt

I tested the new pyroot example, but the program aborted with the following message:

> python qt3example.py

Traceback (most recent call last):
  File "qt3example.py", line 47, in <module>     terminator = ROOT.TQtRootSlot.CintSlot()   File "lib/ROOT.py", line 345, in __getattr1     return getattr( self, name )
  File "lib/ROOT.py", line 367, in __getattr2     attr = _root.LookupRootEntity( name ) AttributeError: TQtRootSlot

I published qt3example.py on a code-snippet-wiki (editable without login):
http://refactory.org/s/using_root_with_python_and_qt4/view/1

Maybe I find some time on the weekend to read something about the qt-layer configs.

Greets Robert

Am Donnerstag, 23. Juli 2009 19:44:55 schrieb Fine, Valeri:
> Hello Robert,
>
> I have neither Python nor PyQt installed to debug PyROOT related issue.
>
> > I tried to translate the python+qt example from the userguide to ruby.
> >
> >> I had to add one modification (line 17, actually in comments) to get
>
> it
>
> > working, but the program doesn't behave as well as the python-version.
>
> From the first glance the example:
> ftp://root.cern.ch/root/doc/19PythonRuby.pdf is for Qt3.
>
> That was fixed by Zoltan Mathe (See his E-mail below)
>
> >> -----Original Message-----
> >> From: Zoltan MATHE [mailto:Zoltan.Mathe_at_ucdconnect.ie]
> >> Sent: Wednesday, June 10, 2009 7:50 AM
> >> To: Fine, Valeri
> >> Cc: WLavrijsen_at_lbl.gov; Rene Brun
> >> Subject: Re: [Fwd: root and qt problem]
> >>
> >> Hello, :)
> >> I changed the qtexample.py, because it is implemented qt3. I attached
> >>
> >> the file. But it still dosn't work.
>
> ....
>
> I've submitted his patch to CERN.
>
> Index: qtexample.py
> ===================================================================
> --- qtexample.py (revision 29535)
> +++ qtexample.py (working copy)
> @@ -1,26 +1,29 @@
> import sys
> -import qt
>
> +from PyQt4.QtGui import *
> +from PyQt4.QtCore import *
> +
> +
> import ROOT
> import sip
>
> -class window(qt.QMainWindow):
> +class window(QMainWindow):
> def __init__(self):
> # Init the main window.
> - qt.QMainWindow.__init__(self)
> + QMainWindow.__init__(self)
> self.resize(350, 350)
>
> # Create the central widget.
> - self.CentralWidget = qt.QWidget(self)
> + self.CentralWidget = QWidget(self)
> self.setCentralWidget(self.CentralWidget)
> - self.Layout = qt.QGridLayout(self.CentralWidget)
> + self.Layout = QGridLayout(self.CentralWidget)
>
> # Create a button.
> - self.QuitButton = qt.QPushButton(self.centralWidget())
> + self.QuitButton = QPushButton(self.centralWidget())
> self.QuitButton.setText('Quit')
> self.Layout.addWidget(self.QuitButton, 1, 0)
> # Connect the button.
> - qt.QObject.connect(self.QuitButton, qt.SIGNAL('clicked()'),
> self.quit)
> + QObject.connect(self.QuitButton, SIGNAL('clicked()'),
> self.quit)
>
> # Create a root histogram.
> self.hist = ROOT.TH1F("pipo","pipo", 100, 0, 100)
> @@ -31,7 +34,7 @@
>
> # Place the TQtWidget in the main grid layout and draw the
> histogram.
>
> -
> self.Layout.addWidget(sip.wrapinstance(ROOT.AddressOf(self.Canvas)[0],qt
> .QWidget), 0, 0)
> +
> self.Layout.addWidget(sip.wrapinstance(ROOT.AddressOf(self.Canvas)[0],QW
> idget), 0, 0)
> self.hist.Draw()
>
> def quit(self):
> @@ -40,11 +43,12 @@
>
>
> if __name__ == '__main__':
> - application = qt.qApp
> + application = qApp
> terminator = ROOT.TQtRootSlot.CintSlot()
> - termAddress =
> sip.wrapinstance(ROOT.AddressOf(terminator)[0],qt.QObject)
> - qt.QObject.connect(application,
> qt.SIGNAL("lastWindowClosed()"),termAddress ,qt.SLOT("Terminate()"))
> + termAddress =
> sip.wrapinstance(ROOT.AddressOf(terminator)[0],QObject)
> + QObject.connect(application,
> SIGNAL("lastWindowClosed()"),termAddress ,SLOT("Terminate()"))
> w = window()
> w.show()
> ROOT.gApplication.Run(1)
> print 'Bye forever!'
> +
>
> > Closing the TBrowser and restarting with another
> > click on the button doesn't work.
> > In some cases windows freeze. Without the
> > fork-command the qt-window freezes.
>
> From the first glance, your application lacks of the "event loop" by
> some reason.
>
> > Maybe it's a bug. Does anyone have a better idea how to make it with
>
> ruby?
>
> I am not aware about any attempt to use QtRoot with ruby.
>
> Anyway, before going further with the guess job please clarify:
>
> 1. What your ROOT version is
> 2. What your Qt version is
> 3. Does you activate QtROOT layer via ROOT resource file
>
> see: "Qt-layer Configuration"
> ftp://root.cern.ch/root/doc/26ROOTandQt.pdf
> p.424
> ?
> 4. Does the patched version of "qtexample.py" works for you?
>
> Thank you, Valeri
>
>
>
> -
>
> > Greets Robert
> >
> > Versions:
> > Root v5.20/00
> > Ruby ruby 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
> > opensuse 11.1 with kde 4.2.4 and ruby-kde4 4.2.4
> >
> > Code with highlighting on pastie.org: http://pastie.org/548613
> > Code without highlighting here:
> >
> > #!/usr/bin/env ruby
> > $KCODE = 'u' # use utf8 encoding of this file
> >
> > require 'Qt4'
> > require 'libRuby'
> >
> > class CustomWidget < Qt::PushButton
> >
> > slots :browse
> >
> > def initialize( label )
> > super( label )
> > end
> >
> > def browse
> > tb = TBrowser.new
> > # fork do gApplication.Run end
> > end
> >
> > end
> >
> > a = Qt::Application.new(ARGV) # create an application object
> > w = CustomWidget.new( 'Start TBrowser' ) # create an instance of our
>
> self-
>
> > made
> > CustomWidget
> > Qt::Object.connect( w, SIGNAL( :clicked ), w, SLOT( :browse ) )
> > w.show # show our widget
> > a.exec # run the application
Received on Sat Jul 25 2009 - 17:07:34 CEST