[Seaside] Difference WAStaticHtmlCanvas >< WAHtmlCanvas

Philippe Marschall philippe.marschall at gmail.com
Wed Mar 12 05:57:30 UTC 2008

2008/3/12, Ramon Leon <ramon.leon at allresnet.com>:
> > Today I had a look at The WACanvas hierarchy, but I do not
>  > understand the difference between WAStaticHtmlCanvas and WAHtmlCanvas.
> > Cheers,
>  >
>  > Claus
>  Look closer, WAHtmlCanvas is an abstract class, #document must be overridden
>  by subclasses.  They are mostly the same thing, WAStaticHtmlCanvas is just a
>  concrete implementation for it.  If WAStaticHtmlCanvas didn't exist and you
>  used WAHtmlCanvas directly, you'd have the WARenderCanvas inheriting from an
>  implementation class.  With the current implementation, WAStaticHtmlCanvas
>  is free to grow without messing up WARenderCanvas, it's cleaner the way it
>  is, one abstract class with two concrete implementations.
>  I'm looking at 2.8 btw, it may have changed in 2.9.  It does look like
>  #textArea needs pushed up, it's the same in both subclasses.

It's still like this, I reported a bug:


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