RE: TPad::GetPrimitive

Add gPad->Update() after h->Draw().

O.

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-----Original Message-----
From: owner-roottalk_at_pcroot.cern.ch
[mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of Carlos Munoz Camacho
Sent: Wednesday, June 08, 2005 4:11 PM
To: roottalk (Mailing list discussing all aspects of the ROOT system)
Subject: [ROOT] TPad::GetPrimitive


Hi,

    If I type in a ROOT session:

TH1F *h=new TH1F("h","h",100,-1,1);
h->Draw();
TPaveStats *st=(TPaveStats*)gPad->GetPrimitive("stats");
st->SetX1NDC(0.1);
h->Draw();

that works fine. Now if a do it in a macro (adding a couple of {} ):

{
TH1F *h=new TH1F("h","h",100,-1,1);
h->Draw();
TPaveStats *st=(TPaveStats*)gPad->GetPrimitive("stats");
st->SetX1NDC(0.1);
h->Draw();
}

ROOT complains like this:

Error: illegal pointer to class object st 0x0 323  FILE:(tmpfile) LINE:5
*** Interpreter error recovered ***

This is ROOT 4.00/08 on Linux. Any hints ?

Carlos

Is there any other (better) way of changing the size of the statbox ?