Re: [ROOT] Emit signals on Histogram scale change?

From: Rene Brun (Rene.Brun@cern.ch)
Date: Tue Sep 24 2002 - 18:00:56 MEST


Hi Brett,

Could you clarify your request? There are many places where
one can emit a signal. When the pad needs to be repaint, it emits a
signal.
Why this signal is not sufficient for your application?
Do you need a signal for events like:
  - start of pad redraw
    - start of histogram redraw
      -start of axis redraw
        -..
      -end of axis redraw
    - end of histogram redraw
  - end of pad redraw

The pad is already emitting the following signals:
 "RangeChanged()
"RangeAxisChanged()
"Closed()"

Rene Brun

On Tue, 24 Sep 2002, Brett Viren wrote:

> Hi Rene, Fons,
> 
> I have a feature request.  
> 
> Could we please have TH[123] emit an Rt signal in the usual way
> whenever it is rescaled?
> 
> I'm a little vague on the TH[123] internals, but it looks like TAxis
> may be a good place to house this signal.  It looks like the Set()'s,
> SetLimits(), and SetRange() seem to be the only methods which would
> need to emit it.
> 
> What do you think,
> -Brett.
> 



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