I believe that I have finished the preview stuff, bar some minor tidy-ups. Attached is a screen shot for you. It's now quick (doesn't block LyX when the buffer is loaded) and the user code has a nice, neat interface. Should please André ;-)
One minor question. Should the foreground colour of the preview be blue
(math) or black (standard text)? Ie, should I use LColor::foreground or
LColor::math?
Two points to address:
1. The preview lettering is not the same size as that of the rest of LyX. I
believe that's because I've misunderstood something ;-)
I'm using
\screen_dpi 95
\screen_zoom 130
Running "gs -r124.5" (= 95 * 130 / 100) gives the result shown.
Anybody got any idea about this stuff?
2. The ascent/descent of the preview is incorrect. Not surprising since I
haven't attempted to extract this info from the PostScript file. I /have/
kept a copy of David's mail on the subject so might look at it in the near
future...
However, at the moment I don't understand the ascent/descent code in
InsetFormula. André, why are you interested in par_->ascent(),
par_->height()? Why not just return the image height? Basically, I don't
understand what's meant to be happening.
int InsetFormula::ascent(BufferView *, LyXFont const &) const
{
const int a = par_->ascent();
if (!canPreview())
return a + 1;
return a + 1 - (par_->height() - loader_->image()->getHeight()) / 2;
}
int InsetFormula::descent(BufferView *, LyXFont const &) const
{
const int d = par_->descent();
if (!canPreview())
return d + 1;
return d + 1 - (par_->height() - loader_->image()->getHeight()) / 2;
}
Any insights?
Angus
preview.png
Description: PNG image
