Hi,
Sorry, I don't have a concise demo code example.
I would like a general facility for creating uniquely named objects mostly
for methods or classes that create internal, named objects. For example, I
have a class which opens a new TCanvas. I would like it to be possible for
multiple instances of this class to coexist -- without having one class's
TCanvas overwrite another's. Some object's, like TCanvas, seem to require a
name (under 2.23 at least, a no name TCanvas doesn't seem to be given a
TCanvasImp).
Is it possible to TTree:Draw into an unnamed TH1?
Right now, I'm using the following code to generate unique names:
Char_t* GetUniqueName(const Char_t* baseName, Int_t baseNum)
{
Char_t *name = new Char_t[200];
baseNum = abs(baseNum);
do {
sprintf(name, "%s%d", baseName, baseNum);
baseNum++;
} while (gROOT->FindObject(name));
return name;
}
Is there a better way?
Thank you.
David
> Hi David,
> I do not see how to implement your suggestion in a general way. This will have
> too many side-effects. Could you give some examples affecting your program?
> The only objects that are automatically added to collections in memory
> are histograms and Trees. We already provide an option (see TH1::AddDirectory)
> to not add automatically histograms to the lists in memory.
>
> Rene Brun
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