RE: [ROOT] Problems with windows version

From: Martijn Schellekens (Martijn.Schellekens@iota.u-psud.fr)
Date: Tue Jun 15 2004 - 19:02:58 MEST


Hi Valeri,

Though very interesting, it seems we misunderstood each other. my,

 > Could we than not imagine either writing the file entirely to some
buffer
 > or even just make a temporary copy of it?

dealt with the problem of Root not releiving the C++ scripts once loaded, 
problem apparently taken care of by Masa.

My
 >I will be looking at QtRoot this afternoon, yet I use the Root widget
 > librairy extensively: is that supported?

dealt with your request whether I could try my problems on QtRoot, which I 
did a little earlier with given results.
Thanks anyway,

Martijn



A 10:52 15/06/2004 -0400, Valeri Fine a écrit :
> >
> > Hi Valeri,
> >
> > Could we than not imagine either writing the file entirely to some
>buffer
> > or even just make a temporary copy of it?
> > I will be looking at QtRoot this afternoon, yet I use the Root widget
> > librairy extensively: is that supported?
> >
>
>
>ROOT applies so-called double buffered technique for TCanvas client
>areas.
>This means all "TCanvas/TPad" images first are stored with some "pixmap"
>array and then the filled "pixmap" is painted to the screen.
>In fact that "pixmap" is the "off-screen buffer" you are speaking about.
>
>TVirtualX class provides a method to create and copy such pixmaps
>http://root.cern.ch/root/htmldoc/TVirtualX.html#TVirtualX:CopyPixmap
>
>and write it to the file later
>
>http://root.cern.ch/root/htmldoc/TVirtualX.html#TVirtualX:WritePixmap
>
>That may be sufficient for your task I don't know.
>
>So far so good. But the problem is the format of the "pixmap" is
>platform depended.
>This means under X11 ROOT does X-pixmap, under Win32 it is "Windows
>pixmap",
>with the Qt layer you can get the pointer to QPixmap object etc.
>
>At this point you have several ways to go, namely,
>
>   1. You don't care about that cross-platform features and want to stick
>some particular one (for example X11).
>   2. You can use TImage class that is a ROOT interface to the various
>"image" objects
>   3. You opt for Qt layer to use QPixmap class (that is available for
>all platforms the Trolltech supports
>    see: http://root.bnl.gov/QtRoot/QtRoot.html#cross
>
>The xform.CC macro that comes with Qt layer distribution does show how
>to do what you want, namely, how to pick the QPixmap filled with TPad
>image and customize it elsewhere. One can easily try this version but
>installing it to some Windows machine (Just click
>http://root.bnl.gov/QtRoot/downloads/root.3.10.02.exe.
>That should take about 2-3 min of your time. If it takes more then send
>me a bug report :-)
>
>See:
>http://doc.trolltech.com/3.3/qpixmap.html#save
>http://root.bnl.gov/QtRoot/QtRoot.html#signal
>http://root.bnl.gov/QtRoot/QtRoot.html#embed
>http://root.bnl.gov/QtRoot/QtRoot.html#qt
>
>also
>
>              Hope this helps, Valeri
>
>
> > Thanks to all,
> >
> > Martijn
> >
> > At 16:17 14/06/2004 -0400, Valeri Fine wrote:
> > > >
> > > > Hi Rooters,
> > > >
> > > > I forgot about just another annoying feature I encoutered with the
> > >windows
> > > > version. Once a script is loaded and at some point the execution
> > >failed,
> > > > root does not leave the script so it becomes impossible to access
>that
> > > > script for writing purpose anymore.
> > >
> > >
> > >It is not ROOT feature. It is a feature of Windows file system. If
>some
> > >file is OPEN somewhere it can NOT be re-open again to WRITE unless it
>is
> > >closed.
> > >
> > >I am afraid to do what you want ROOT will have to open and close the
> > >file after each line it reads in.
> > >
> > >Just my 2 cents :-(
> > >
> > >                        Valeri
> > >
> > > > This makes the user having to quit his
> > > > root session before he can correct his mistake. I did not have
>such
> > > > problems with the Linux versions.
> > > >
> > > > Thanks a lot,
> > > >
> > > > Martijn
> > > >
> > > > >Date: Mon, 14 Jun 2004 18:44:10 +0200
> > > > >To: roottalk@cern.ch
> > > > >From: Martijn Schellekens <Martijn.Schellekens@iota.u-psud.fr>
> > > > >Subject: [ROOT] Problems with windows version
> > > > >
> > > > >Hi Rooters,
> > > > >
> > > > >I'm experiencing difficulties with the gSystem->SetBuildDir()
> > >function
> > > > >under windows 2000.
> > > > >Versions tried have been both 4.00/06a and 3.10/02. My files
>simply
> > >dont
> > > > >compile as root can not find its own created header files back.
> > > > >(command used was an absolute path:
> > >gSystem->SetBuildDir("c:/Root/Mlib") )
> > > > >
> > > > >In terms of other annoying features in the windows version:
>sometimes
> > > > >something goes wrong with the displaying of the compiler messages
> > >inside
> > > > >the terminal. Those become simply unreadable. Windows version is
>the
> > > > >french version of 2000.
> > > > >I have by that way a question for the windows users: are there
>any
> > >better
> > > > >windows terminal emulators than those provided by the base
>operating
> > >system?
> > > > >
> > > > >Last and also the least: Xinerama doesn't seem to be supported in
>the
> > >gdk
> > > > >librairy for windows (I only checked this for the windows
>version).
> > >Hence
> > > > >if I open a ComboBox on a second screen, it will open this
>combobox
> > >on my
> > > > >main screen. I dont really care about this but I just wanted to
> > >notify it.
> > > > >
> > > > >Thanks a lot anyway for the job done,
> > > > >
> > > > >Martijn Schellekens
> > > > >
> > > > >PS: Rene, I did get your reply to my question on recursive fits
>from
> > >your
> > > > >website. I filled in the request form with a wrong adress.
> > > > >I thank you very much.



This archive was generated by hypermail 2b29 : Sun Jan 02 2005 - 05:50:08 MET