How to draw object immediately

[Vladislav]

Dear Bertrand, Couet and Wile_E_Coyote
Thanks!!!

Also I found topic with the same solution from Bertrand).

How to call gSystem->ProcessEvents() to avoid frozen canvas

Dear rooters, I am writing a histogram display program. It fetches histograms from a server and display them locally. The canvas where the histogram is drawn should respond to user mouse events. Here is a simplified version: { TTimer *timer = new TTimer(0); timer->SetCommand("gSystem->ProcessEvents();"); timer->Start(); TH1F h1("h1", "histo from a gaussian", 100, -3, 3); while(1) { h1.FillRandom("gaus", 10000); h1.Draw(); getchar(); // break in some condition } …