Re: [ROOT] How to make colz default for TBrowser?

From: Valeriy Onuchin (Valeri.Onoutchine@cern.ch)
Date: Sat Sep 20 2003 - 19:15:41 MEST 

 Hi Rene,
it's easy to fix by adding changes to SetOpt function

void SetOpt(TObject* obj)
 {
    TObject* memobj = obj;

    if (obj->InheritsFrom(TKey::Class())) {
        memobj =   ((TKey*)obj)->ReadObj();
    }

    if (memobj && memobj->InheritsFrom(TH2::Class())) {
       ((TH2*)memobj)->SetOption("colz");
    }
 } 

Regards. Valeriy


> Hi Valeriy,
> 
> Your technique does not work in case of browsing histograms in a file 
> (most frequent case). In this case obj is a TKey not a TH1.
> 
> Rene
> 
> On Sat, 20 Sep 2003, 
> Valeriy Onuchin wrote:
> 
> >  Hi Alexander
> > it can be done with a trick using signal-slots:
> >  - create macro (e.g. tst.C) containing the following function:
> > 
> > void SetOpt(TObject* obj)
> > {
> >    if (obj->InheritsFrom(TH2::Class())) {
> >       ((TH2*)obj)->SetOption("colz");
> >    }
> > } 
> > 
> >   - load it 
> >   root[].L tst.C
> >  - make class signal-slot connection
> >   root[] TQObject::Connect("TRootBrowser","DoubleClicked(TObject*)",0,0,"SetOpt(TObject*)");
> > 
> > mouse double click in any root browser will invoke SetOpt function
> > 
> > That's all. 
> > 
> > Regards. Valeriy
> > 
> > 
> > > Hi,
> > > 
> > > in the TBrowser, I would like to click on a TH2 and have it drawn with
> > > option 'colz' by default. I tried to edit the root.mimes but this did not
> > > help. How can this be done?
> > > 
> > > Thanks for your help.
> > > 
> > > Alexander
> > > 
> > > 
> > 
> 
>

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