Rene, Painting isn't the problem. Once it is painted the Menu Bar is Greyed out and you cannot inspect the items on the canvas. I would like to be able to edit the canvas (and historgrams) while the main macro is still running. Thanks again jon On Tue, 20 Jun 2000, Rene Brun wrote: > Hi Jon, > call TCanvas::Update in your loop to force the canvas to be paint. > > By default, the canvas is paint when a <CR> is typed (normal command mode) > or when TCanvas::Update is called. > > Rene Brun > > Jon Gans wrote: > > > > I have a menu system that takes input from cin inside a while loop. This > > macro calls other functions that draw canvases. However, after the canvas > > is drawn, since the calling macro is still in the loop, the canvas are > > frozen. > > > > Is there some semaphore I can overide to make these canvas active while > > the calling macro is waiting for more input? > > > > Thanks > > jon
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