Re: Scrolling as overlap avoidance (Re: Alternative approach to scrolling, with demos)

Hmm, ok, I see a potential problem with the use case under point #10 in
http://www.dcmp.org/captioningkey/text.html - for the purpose of showing as
much image as possible, you want the background width to be no larger than
the actual text width + padding. That is what is shown in this image (and
also in #9). But if you scale the font, you eventually need to wrap around
when the left/right cues grow too close to each other.

That leaves two options:

1. explicitly specify cue width, and have the background extend all the way
across the width. That covers more image than you should, and also doesn't
look very pleasing aesthetically if you have a large black/translucent bar
with no text in it.

2. force some kind of maximum width, after which you wrap around - but the
cue width can be smaller than the max depending on font metrics. And the
background extends only across the real cue width.

I'm not yet fully up to speed - does WebVTT cover #2? Or are there
alternatives that could give the desired behavior?

Christian


On Thu, May 8, 2014 at 6:58 PM, Silvia Pfeiffer
<silviapfeiffer1@gmail.com>wrote:

> On Fri, May 9, 2014 at 3:25 AM, Christian Vogler
> <christian.vogler@gallaudet.edu> wrote:
> > Just checking here, what does this mean for text background? Say, you
> have
> > white text on black background - will the black extend only to the width
> of
> > the actual text plus padding?
>
> In the non-region case:
>
> If you explicitly specify the width of your cue and the text is much
> smaller than the width, the background will still cover the fully
> specified width.
> If you do not specify a width, then the cue with is determined
> automatically based on the text width and the background will only be
> on the width of the text.
>
>
> In the region case:
>
> The non-region case background on ::cue still applies.
>
> However, there is now also a region box whose size is explicitly
> determined (width/height). You can set a background color on that box
> with ::cue-region . That background covers the full width of the
> region no matter the width of the cues or cue text inside.
> As for the height: in the case of scrolling regions, the height is
> dynamic and depends on the number of lines that are being rendered.
> For non-scrolling regions the height is fixed, so a non-scrolling
> region without cues inside with a red background will be a red
> rectangle on screen.
>
>
> Hope that clarifies it?
>
> Silvia.
>



-- 
Christian Vogler, PhD
Director, Technology Access Program
Department of Communication Studies
SLCC 1116
Gallaudet University
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