Preview sizes.

[Scott Kostyshak]

On Sat, Nov 30, 2024 at 11:53:24AM +1300, Andrew Parsloe wrote:
> On 29/11/2024 10:26 pm, Scott Kostyshak wrote:
> > > I've been able to simplify the document to fairly minimal (attached) and can
> > > now provide a recipe:
> > > 
> > > 1. Open LyX and the LyX temporary directory (with the list of lyx_tmpbuf0,
> > > ...)
> > > 
> > > 2. Load test.lyx in LyX
> > > 
> > > 3. A new lyx_tmpbuf<n> is formed; open it asap.
> > > 
> > > 4. If you are quick enough you should see shrunken previews, rather than at
> > > normal screen font size.
> > > 
> > > Opening the temp buffer seems to force or accelerate the generation of the
> > > previews before they have learnt of the screen font size. The numbering of
> > > the equations in test.lyx (or some other delaying process) seems to be
> > > necessary.  I use a Default zoom (and slider) of 168% (old eyes) and preview
> > > size of 1.0.
> > > 
> > > Andrew
> > Thanks, Andrew. Your diagnosis does make sense. I do not notice anything from the user perspective, but indeed I haven't checked the temp directory. I will try to experiment more. From your description, I see two potential bugs:
> > 
> > 1. When the problem occurs, the previews are not updated to the correct size until you edit it, right? Or is it like the bad previews show for one second and then they are correctly updated?
> > 
> > 2. Inocrrect previews are generated before they are corrected.
> > 
> > In my opinion, (1) is worse and potentially easier to fix than (2).
> > 
> > Scott
> 
> My recipe is somewhat ambiguous at step 4. What I mean is that if you open
> the temporary buffer soon enough, the previews that (eventually) form in LyX
> will be diminished.  The shrunken previews persist throughout the session
> unless a preview update of the whole document is forced, most conveniently
> by Ctrl+0 (buffer-zoom). For an inidividual shrunken preview, editing it and
> then moving the cursor outside should restore it to full size, although you
> might get caught by the #13116, #13123 bug where the preview does not
> initially show the changed content. (It seems to depend on the size of the
> document whether this happens or not.)

Thanks for those details. I've tried a couple of tweaks but still cannot reproduce on my side. Hopefully someone else can reproduce.

Scott
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