Re: Draw histograms in Canvas

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Mar 26 1999 - 15:27:14 MET


Hi Anton,
Iconizing a canvas and back will not force  a call to the TH1 drawing
functions.
The TCanvas::Update function is only called when the canvas content has
been modified, or the scale of the canvas modified by growing/shrinking
its dimensions with the mouse.

Rene Brun

On Fri, 26 Mar 1999, Anton Fokin wrote:

> Hi rooters,
> 
> I wonder if a histogram will be actually drawn (i.e. histogram->Draw() will
> consume the same amount of processor time and go through the the same code)
> if a Canvas is iconized/hidden/etc. Or it's my duty to check if a histogram
> is hidden and doesn't need to be redrawn. Also, if I go from an iconized to
> normal Canvas, will it force automatic redraw update for all histograms
> belonging to the Canvas?
> 
> Best regards,
> 
> Dr. Anton Fokin
> 
> Division of Cosmic and Subatomic Physics
> Lund University
> Sweden
> 
> 



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