Re: Refection vs Code Generation

Question, when you "extend" swixml, is it done via xml
declaring the extending classes, or is it
programatically done at runtime before/after the
swixml engine is started and loads xml uis?

--- Lutz Neumann <[email protected]> wrote:
> Yes as Kate said, background="WHITE" works for sure,
> background="Color.WHITE" does not (by the way -
> background="xxx, xxx,
> xxx" works also.)
> Because SwixML includes the Color class as a
> constant provider, all
> predefined colors will work this way.
> Have a look at PrimitiveConverter.java to see all
> included providers.
> 
> If you have special needs you can always register a
> new provider like:
> 
>    
> PrimitiveConverter.addConstantProvider(Font.class);
> 
> .. and use PLAIN, BOLD, ITALIC, ...
> 
> If you want to use system colors (as I do), try the
> following:
> 
> import javax.swing.*;
> 
> import org.jdom.Attribute;
> import org.swixml.Localizer;
> import org.swixml.converters.ColorConverter;
> 
> /**
>  * Extends SwixMLs ColorConverter to use system
> colors.
>  * 
>  * @author Lutz Neumann
>  */
> public class ExtColorConverter extends
> ColorConverter
>     {
>     public Object convert(Class type, Attribute
> attr, Localizer localizer)
>         {
>         if (attr.getValue().startsWith("UIColor."))
>             {
>             return
> UIManager.getColor(attr.getValue().substring(8));
>             }
>         if (attr.getValue().startsWith("Color."))
>            
> attr.setValue(attr.getValue().substring(6));
>         return super.convert(type, attr, localizer);
>         }
>     }
> 
> Register it with:
> 
>        
> ConverterLibrary.getInstance().register(Color.class,
> new ExtColorConverter());
> 
> Now you can use
> foreground="UIColor.activeCaptionText",
> background="UIColor.Button.background", etc. - even
> "Color.WHITE"
> works ;-).
> 
> Hope this helps,
> 
> -Lutz
> 
> 
> 
> > I agree about extending attributes needing to be
> more obvious. I think 
> > this is mostly a documentation issue although I
> haven't actually tried it.
> 
> > The biggest problem with things like new 
> Color(xxx, xxx, xxx) as an 
> > attribute value is that there are just too many
> possibilities that 
> > people would want  and too little time to code
> them all. I think the 
> > best approach is to do the main ones (see below)
> and just really 
> > document how to extend it. Plus get this all the
> things like this into a 
> > plug-in archictecture (old discussion see
> archives) so that we can all 
> > contribute our little bits to the whole.
> 
> > While Color.WHITE may not work I *think* that
> WHITE does. I think all 
> > the Color.xxx have been implemented.  But, it's
> been a while since I 
> > tried that I just remember it working and not
> having to specify hex vals.
> 
> > -Kate
> 
> 
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>
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