Instant preview displays qtree.sty trees without nodes

[zakryto@…]

With \usepackage[noeepic]{qtree} in the preamble, Instant Preview displays the simple tree \Tree [.a b c ]
without nodes. The tree shows up correctly (with nodes) in the PDF when viewed with ps2pdf or dvipdfm.
This could be because Instant Preview uses pdflatex?

[Juergen Spitzmueller]

confirmed.

[Juergen Spitzmueller]

The branches disappear within the dvipng process.

[Juergen Spitzmueller]

It's a dvipng problem indeed. Look here:
​http://lists.gnu.org/archive/html/dvipng/2007-06/msg00000.html

Nothing we can do from the LyX side ATM.

[Juergen Spitzmueller]

Jan-Ã
ke Larsson, the dvipng developer, wrote:

"From what I can see, the branches are drawn using raw postscript code.
This is different from the usual EPS-inclusion specials that dvipng
handles gracefully. Possibly, I could add code to a) draw the lines
using libgd primitives or b) send these specials to gs, but to do that
in a generic way is difficult. Not sure what to do here."

[Uwe Stöhr]

It's a dvipng problem indeed.

Marking WONTFIX as we cannot fix this.

[Juergen Spitzmueller]

Just to inform the people suffering from this: Jan-Ã
ke Larsson wrote on the
dvipng list, that he's about fixing this issue. So chance is good that the next
dvipng version will display qtree properly.

[Juergen Spitzmueller]

Status update: Jan-Ã
ke Larsson has fixed the problem in the development tree of
dvipng:
​http://lists.gnu.org/archive/html/dvipng/2007-07/msg00001.html

I tested it and it works fine now. So expect the forthcoming dvipng version
(probaly 2.0) to display the qtree branches correctly.