I have divided a canvas in pads with TCanvas::Divide(int,int). In a later
stage I would like to update the canvas, but some of the pads are
modified. However, I do not understand how to tell that to the TCanvas.
More concrete:
TH1F* firsthisto = new TH1F(...);
TH1F* secondhisto = new TH1F(..);
TCanvas* c1 = new TCanvas();
c1->Divide(2,1);
c1->cd(1) ; firsthisto->Draw();
c1->cd(2) ; secondhisto->Draw();
firsthisto->Fill(...);
secondhisto->Fill(...);
c1->Modified();
c1->Update();
// Up to here everything works fine
firsthisto->Fill(...);
secondhisto->Fill(...);
c1->Modified();
c1->Update();
// Now the histograms are not changed.
Probably I need to modify each subpad. However, if I try to access them
with
c1->cd(1); (c1->GetSelectedPad())->Modified();
there is a segmentation fault.
How should I set `modified' for the subpads? Is it possible to set
`modified' for all subpads at once ?
Regards,
Wouter