Re: [e4-dev] css

[Bogdan Gheorghe <gheorghe@xxxxxxxxxx>]

Hi Tom -

Your observations are right on - there
needs to be a better distinction made between our "custom" CSS
syntax and the standard selectors. I'm all for refactoring the custom property
names - I've opened https://bugs.eclipse.org/bugs/show_bug.cgi?id=354783
to track this. 

We also really need a CSS editor both
for code completion and for "live" editing of a CSS file. I'm
not sure if you had a bug open for this - I've created https://bugs.eclipse.org/bugs/show_bug.cgi?id=354785
just in case. I'm not sure how far along you are, but I'd be ready and
willing to help. Having a dependency on XText for the tooling is OK but
I don't know if we would want to add it as a dependency to the css core
(something to look at later). 

Bogdan

PS. Some of those constructs that you
mentioned were giving the editor a hard time should be alright. I've seen
legit examples of combing a class id with an id selector:

<h1 id="one" class="two">This
Should Be Red</h1>

#one.two { color: red; }

From:	Tom Schindl <tom.schindl@xxxxxxxxxxxxxxx>
To:	E4 Project developer mailing list <e4-dev@xxxxxxxxxxx>
Date:	08/15/2011 01:51 PM
Subject:	Re: [e4-dev] css
Sent by:	e4-dev-bounces@xxxxxxxxxxx

---

Hi Ann,

You have to distinguish between:
a) CSS as a Language (e.g. selectors, pseudo-selectors,...)
b) CSS-properties

We only support the very basic attributes like font, color, background
color (including some paint types), ... and some custom ones (for
CTabFolder).

I've sent a mail to this list after we shipped 4.1 where I highlight
some problems with our current css treatment because we are not
following general rules here (e.g. it is good practice to prefix custom
attributes using -vendor (e.g. -moz, -webkit,...)) and our own SDK-CSS
is not even valid CSS because the selector some of the selectors defined
are simply invalid if you read the css spec.

Sad enough I didn't get a response on it.

My personal opinion on CSS is that we advertised it completely wrong
because people now think they can apply all CSS-Properties they can in
HTML which is far from true because naturally SWT has constraints we are
not able to overcome.

I think in reality only toolkits who completely draw the UI (like Swing,
JavaFX, Browser-Rendering-Engines) are able to fully implement
CSS-Properties but as said that's my personal opinion and others may
disagree.

Tom

Am 15.08.11 19:40, schrieb Ann Smith:
> Thank you Angelo that information is very helpful. For example for
> shadows on my labels can I use this property within my application?
> I am building a GUI and some of CSS2 support is ran from a browser
> window. or can you direct me to any tutorials or projects that are
GUI
> based and have used CSS2?
> 
> Regards,
> Ann.
> 
> On Mon, Aug 15, 2011 at 6:33 PM, Angelo zerr <angelo.zerr@xxxxxxxxx
> <mailto:angelo.zerr@xxxxxxxxx>>
wrote:
> 
>     Hi Ann,
> 
>     Just for your information, E4 CSS engine is based on
W3C SAC Parser
>     API http://www.w3.org/Style/CSS/SAC/
to load CSS style properties.
>     The implementation used by E4 CSS engine is batik which
supports
>     CSS2 (not CSS3). Problem with CSS3 that it doesn't exists
Java
>     implementation for CSS3 (not for CSS2). Once it will
exists CSS3
>     implementation (SAC Parser), it will be easy to use
it without
>     changing E4 CSS engine to use CSS3.
> 
>     Regards Angelo
> 
> 
>     2011/8/15 Ann Smith <annsmith.smith38@xxxxxxxxx
>     <mailto:annsmith.smith38@xxxxxxxxx>>
> 
>         Thanks that is exactly what I was looking
for. Do you call the
>         CTabFolder within the CSS files? or is
there any tutorials out
>         there?
> 
>         Thanks for your help,
>         Ann
> 
> 
>         On Mon, Aug 15, 2011 at 4:18 PM, Bogdan
Gheorghe
>         <gheorghe@xxxxxxxxxx <mailto:gheorghe@xxxxxxxxxx>>
wrote:
> 
>             Hi Ann -
> 
>             Currently it is mainly css2
support with a number of custom
>             properties for CTabFolder.
You can find these here:
>             _http://wiki.eclipse.org/E4/CSS/SWT_Mapping_
> 
>             Regards,
>             B
> 
> 
>             From:      
           Ann Smith <annsmith.smith38@xxxxxxxxx
>             <mailto:annsmith.smith38@xxxxxxxxx>>
>             To:      
           E4 Project developer
mailing list <e4-dev@xxxxxxxxxxx
>             <mailto:e4-dev@xxxxxxxxxxx>>
>             Date:      
           08/12/2011 04:43
AM
>             Subject:      
           [e4-dev] css
>             Sent by:      
           e4-dev-bounces@xxxxxxxxxxx
>             <mailto:e4-dev-bounces@xxxxxxxxxxx>
> 
> 
>             ------------------------------------------------------------------------
> 
> 
> 
>             Hi,
>              
>             Just wondering does e4 support
css3 if using a stand alone
>             GUI? or is it only css2?
>              
>             Ann._______________________________________________
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