Re: Emacs, QT and Cairo

[joakim@verona.se]

David Engster <deng@randomsample.de> writes:

> Drew Adams writes:
>>> http://blogs.sun.com/tor/resource/formatting-before.png>> I think it is currently not possible to do stuff like this?
>>
>> Depends what you mean by "stuff like this".  See vline.el and col-highlight.el
>>
>> http://www.emacswiki.org/emacs/HighlightCurrentColumn
>
> I mean stuff like "draw a line with a width of 1 pixel transparently at
> a certain position in this buffer". For example, instead of a different
> background color, I would like to draw a rectangle around code forming
> one semantic tag in the Minimap. Another one: I think faint lines
> hinting at the indentation level might be useful at times, like Komodo
> does it:
>
> http://delimitdesign.com/wp-content/uploads/2009/03/komodo-edit-text-editor.jpg
>
> I know I can use overlays to approximate that, but I'd have to jump
> through hoops to get there (just look at the code in vline.el), and in
> the end it's often slow and you have to make compromises (vline vanishes
> while scrolling, for example). And it would probably even look ugly...

There are patches around that allows the buffer background to be an
image. That support could perhaps be tweaked to allow an SVG, generated
from elisp.

It would probably be difficult to keep the SVG and the buffer text in
sync though.




> Regards,
> David
-- 
Joakim Verona