TGAxis tick size

ROOT
1

Hi there,

I’ve created a TGAxis. Everything’s fine except I cannot change the tick size in any way!

TCanvas *canvas = new TCanvas ("canvas","canvas",0,0,1000,618) ; canvas->Range(-10.,0.,10.,100.) ; TGaxis *ax = new TGaxis(-5.,50.,2.,50, -9.,9., 510,"-+"); ax->SetLineColor(kRed) ; ax->SetLabelColor(kBlue) ; ax->SetLabelFont(112) ; ax->SetLabelOffset(0.1) ; ax->SetLabelSize(0.05) ; // ok ax->SetTickSize(0.) ; // ?!? ax->Draw() ;
I’m using Root 5.22.00.

Cheers,
Z

2

do:

TGaxis *ax = new TGaxis(-5.,50.,2.,50, -9.,9., 510,"-+S");
3

Thanks.
Indeed, this was clearly written in the doc.
Maybe should it appear as " chopt=‘S’ " to be consistent with the rest of the doc (I only looked for all the “chopt=” key string during my research).
Sorry for having missed that point.
Z

4

The whole TGAxis doc has to be revisited any way. This option “S” is not intuitive and comes from cernlib. It has to be much more clearly explained.

5

Would also be nice to make the API consistent with TAxis. TGAxis has SetTickSize() while TAxis has SetTickLength() …

6

Yes it would be nice. But there is some backward compatibility issues there .

7

[quote]But there is some backward compatibility issues there[/quote]Unless complementary functions are added to the corresponding headers

/// TGaxis.h void SetTickLength(Float_t ticklength) {SetTickSize(ticklength);} /// TAttAxis.h void SetTickSize(Float_t ticksize) {SetTickLength(ticksize);}(Diff files against master attached)
Cheers,
Z

PS: TAttAxis.h is not the same in head branch 5.34 and master (see TAttAxis.h__diff_hb534_vs_master)
TGaxis_h__gitdiff_master.txt (728 Bytes)
TAttAxis_h__gitdiff_master.txt (744 Bytes)
TAttAxis_h__diff_hb534_vs_master.txt (197 Bytes)

8

Yeah, I don’t see a problem with backward compatibility if you just add a new method.

9

Done.

10

Thx Olivier.
Could you please also patch the v5-34-00-patch branch?
Diff files attached.
Cheers,
Z
TGaxis_h__gitdiff_pb534.txt (728 Bytes)
TAttAxis_h__gitdiff_pb534.txt (1.36 KB)

11

Hi Mathieu,

I Did already … I did both…

Cheers,
Olivier

12

Indeed.
Sorry about that (bad update I suppose).
Thx again.
Z

13

I’d like to ask a question here.

Well, I can:
gStyle->SetFrameLineWidth(Width_t width = 1);
gPad->SetFrameLineWidth(Width_t width = 1);
but I’ve forgotten how I can change the width of the ticks’ lines (for a TAxis and TGaxis).

14

It looks like the is no specific attributes for that.
Looking how the Bold style does it it seems that le tick is:

gStyle->SetLineWidth(3);