Re: draw line

[Kim F. Storm]

"Jonas Bernoulli" <jonas@bernoulli.cc> writes:

> I would like to draw a one-pixel line. I have tried quite a few things
> by now but none of them works.
>
> Here are two ways I have tried. Evaluating them should draw a red line
> on the next line, which is only one pixel high.
>
> (insert (concat "\n" (propertize "\n" 'face '(:background "red")
> 'display '(space :height (1)))))
>
> (insert (concat "\n" (propertize "\n" 'face '(:background "red")
> 'line-height 1)))
>
> This doesn't sound very promissing:
>
> 38.11 Line Height
> ... However, no matter what you specify, the actual line height can
> never be less than the default. ...

Does this help?

   A newline can have a `line-height' text or overlay property that
controls the total height of the display line ending in that newline.

   If the property value is `t', the newline character has no effect on
the displayed height of the line--the visible contents alone determine
the height.  This is useful for tiling small images (or image slices)
without adding blank areas between the images.


-- 
Kim F. Storm  http://www.cua.dk