Fons:
>From the documentation, it was not clear to me that I should not use
TUnixSystem. I will now use the global pointer gSystem instead. My
example did not need to use TUnixSystem; rather, I used it to demonstrate
the problem I was having using TUnixSystem in my "real" code. Thanks for
you help.
Glen
On 02-Jul-2001 Fons Rademakers wrote:
> Hi Glen,
>
> never create a TUnixSystem object yourself (why was your intention)?
> Anyway, the following version of your viewer.cxx works fine:
>
> //==================================
>#include <TApplication.h>
>#include <TTree.h>
>#include <TFile.h>
>
> class TViewer {
>
> private:
> TTree *fTree;
> TFile *fFile;
>
> public:
> TViewer() {
> fFile = new TFile("tree3.root");
> fTree = (TTree *)fFile->Get("t3");
> fTree->StartViewer();
> }
> ~TViewer() {delete fFile;}
> };
>
> void main(int argc, char **argv) {
>
> TApplication theApp("test",&argc,argv);
> new TViewer();
> theApp.Run();
> }
> //==================================
>
>
> Cheers, Fons.
>
>
>
>
> "Glen R. Salo" wrote:
>>
>> I am having strange problems when I use TUnixSystem as illustrated in
>> the
>> attached code. Compile the code (g++ -o viewer viewer.cxx `root-config
>> --cflags` `root-config --libs`), copy tree3.root from tutorials to the
>> same directory, and run viewer. On my computer, if I draw "ntrack" a
>> histogram is drawn correctly. However, if I try to draw any of the
>> other
>> branches ("stat", "sign", ...), the code immediately exits and writes
>> "Alarm clock" to my shell window. If the UnixSystem line is removed or
>> replaced with "TUnixSystem *System = new TUnixSystem();" the program
>> works
>> fine.
>>
>> Thanks for your help,
>>
>> Glen
>>
>> ----------------------------------------------------------------------
>> ----------
>> Name: viewer.cxx
>> viewer.cxx Type: unspecified type (application/octet-stream)
>> Encoding: base64
>> Description: viewer.cxx
>
> --
> Org: CERN, European Laboratory for Particle Physics.
> Mail: 1211 Geneve 23, Switzerland
> E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
> WWW: http://root.cern.ch/~rdm/ Fax: +41 22 7677910
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