Wrong y zoom with empty hbar histogram

[ferdymercury]

• Checked for duplicates

Describe the bug

Draw hbar is supposed to be the same as bar, but rotated. However, this fails if the histogram is empty.

Expected behavior

hbar shows the same as bar, but rotated 90 degrees

To Reproduce

auto c = new TCanvas()
c->Divide(2,1)
auto h = new TH1F()
c->cd(1)
h->Draw("bar")
c->cd(2)
h->Draw("hbar")

Setup

   ------------------------------------------------------------------
  | Welcome to ROOT 6.26/06                        https://root.cern |
  | (c) 1995-2021, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for linuxx8664gcc on Jul 28 2022, 18:08:51                 |
  | From tags/v6-26-06@v6-26-06                                      |
  | With c++ (Ubuntu 11.2.0-19ubuntu1) 11.2.0                        |
  | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q'       |
   ------------------------------------------------------------------

Additional context

#12566

[couet]

I see it also with master. Thanks to have reported.

[couet]

This piece of code is the faulty one. It looks weird ... I do not really understand the logic right now.

[couet]

Indeed there is similar code in PaintInit. It does not match. It should be similar I guess.

[couet]

Fix here: #12876

[github-actions]

Hi @couet,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖

[github-actions]

Hi @couet,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖