> I wasn't able to get it to work. I have dvisvgm installed. I tried
> with the standard config, with dvipng, etc. preview-point-buf-change is
> called, but no buffer frames appear. When I get the chance, I'll try
> starting from a naked config and see if it works then.
Hmmm.. I am not sure what could be the reason. Just to confirm, you have to have
`preview-image-type` be 'point-dvisvgm (or 'point-dvipng) not 'dvipng.
> My interest in this as an alternative to the usual preview approach is
> that when I edit beamer documents, I sometimes want to see whole frame
> environments (rather than individual formulas) previewed as a unit.
> It'll be nice if the package is flexible enough to allow that option.
The package uses preview, so anything that can be previewed there can be shown
in a frame.
I think making beamer frames preview-able should be doable by calling (untested)
\PreviewEnvironmentMacro[{[]}]{frame}
after the preview package is loaded or by modifying `preview-default-preamble`
or `preview-LaTeX-command` to include this call.
However, this would cause the frame to be previewed as a while and prevent
previewing
environments inside it.
> I haven't encountered this issue myself, but a couple people have told
> me that they experience display errors when using
> preview-leave-open-previews-visible with files in certain shared
> folders, so it might be worth thinking through if the issue you raise
> here could be related to that.
Difficult to say for me. It was very difficult to debug this code when I saw
those errors. I think improving the handling of files (to avoid display errors
and file orphaning) would be welcome.
On 27/08/2025, Uwe Brauer wrote:
> I see, but if I add a new formula, I have to run preview-at-point again,
> right?
Not if you have the hook in 'after-change-functions to call
'preview-point-buf-change
which is what this piece of configuration is doing (requires re-opening the tex
file)
(add-hook 'LaTeX-mode-hook
(lambda () (add-hook 'after-change-functions
#'preview-point-buf-change nil t)))
'preview-point-buf-change automatically calls `preview-at-point` if there's a
preview already at point, or if (by default) the point is inside a math
environment.
Best regards,
-- Al
