On Fri, May 10, 2013 at 7:05 PM, Allan Day <allanp...@gmail.com> wrote:
> Owen Taylor <otay...@redhat.com> wrote:
>> I think you can quickly get into prohibitively heavy complexity here,
>> which is why, presumably, that CSS doesn't try to to have the idea of
>> start and end states.
>
> Indeed.
Just out of curiosity... wouldn't it make sense to have the concept of
start and end states, if at least the start states could be wildcarded ?
This way one could specify:
"pressed" -> "insensitive" (a custom transition to become insensitive)
"*" -> "insensitive" (the default transition to become insensitive)
Anyway, if this is intentionally impossible by the CSS specification,
and if we are hell bent on following that specification to the letter,
then I suppose there is no argument... just seems a bit impractical
to define these intermediate states in code...
Cheers,
-Tristan
>> If I was handling this on the web, I'd probably do something like,
>> in setup:
>>
>> $(button).transitionEnd(
>> function() {
>> $(this).removeClass('pressing');
>> });
>>
>> When pressed:
>>
>> $(button).addClass('pressed').addClass('pressing');
>>
>> In CSS:
>>
>> .button.pressed { background: red; }
>> .button.pressing { transition: background 1s; }
>>
>> I think we possibly should do something similar here. We could do
>> something like:
>>
>> gtk_style_context_add_temporary_class(button,
>> GTK_STYLE_CLASS_PRESSING);
>>
>> With the semantics of "temporary" meaning "removed when last transition
>> finishes". I don't think you'd need many of these style classes to allow
>> most of what the designers want.
>
> If you want to get an idea of how many transitions there might be, I'd
> be happy to write up what I'd like to happen in terms of behaviour.
>
> Allan
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