Re: cursor doesn't show through transparent images in emacs 22, unlike emacs 21

[Ken Manheimer]

On 8/30/06, Richard Stallman <address@hidden> wrote:
>     > > i also see no visible difference when i do or don't put the cursor on
>     > > the image - certainly no sign of the cursor, when it's there.  (was
>     > > the corners heuristic defeated by this particular image?)
>     >
>     > I don't think it is applied unless one uses the :heuristik-mask
>     > property or its equivalent.
>
>     looks like that's the interface i was missing, for controlling how the
>     cursor is displayed when on an image.  the info for it even mentions
>     that the default heuristic is to assume the background color is the
>     one that occurs most frequently in the images four corners.
>
> If I understand these paragraphs right, the first one
> seems to say that the cursor does not appear, and the second
> one says the cursor will not appear unless the programmer has used
> the :heuristic-mask property.  Did I understand them right?
>
> If that is true, we have a bug, right?
>
> But the third paragraph seems to say that the default for
> :heuristic-mask is such as to make sure the cursor appears.
> Did I understand that right?
>
> If that is true, then maybe we don't have a bug.
>
> What's the real situation here?

when i tried it, the cursor wouldn't show unless i included a ":mask
'heuristic" property.  by default, i was referring to the type of
heuristic used when you specify 'heuristic without a specific type.

if i understand correctly from kim and juri's discussion, the only
reason kim saw the cursor in his solid image without specifying a mask
was because he use an image smaller than his default character size,
so there was some empty border around the image.

i believe kim suggested something like showing a margin with the
cursor color around such images when there is no such border, which i
expect is a good for that remaining case.
--
ken
address@hidden
http://myriadicity.net