RE: Changing canvas size

Hi Akira,

SetWindowSize changes the window size but the action is kept in a queue and not performed immediately. To flush the queue it is enough to do gSystem->ProcessEvents(); . That's what SaveAs is doing and that's why your 2nd png file has the correct size. So to make your macro working it is enough to modify it as shown in the following example. On my side I will add a gSystem->ProcessEvents(); in SetWindowSize (like in SaveAs), so it will not be necessary to add it in users' macros, and the example given in the help of TPad will be correct.

{

   Double_t w = 600;
   Double_t h = 600;
   TCanvas * c1 = new TCanvas("c", "c", w, h);    c->SetWindowSize(w + (w - c->GetWw()), h + (h - c->GetWh()));    gSystem->ProcessEvents();
   c->SaveAs("c1.png");
   c->SaveAs("c2.png");
}

Cheers, Olivier

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