Tuesday, April 29, 2014

Re: UiBinder and writing custom parsers

On Monday, April 28, 2014 8:48:51 PM UTC+2, stuckagain wrote:
I need to write a custom widget that is to be used in UiBinder to easily layout a form of properly aligned fields (in multiple columns).

I tried to avoid using a custom widget by defining some resusable stylenames, but it would be much nicer if I could just abstract away whether you need a DIV/TABLE/TR/TD/SPAN/LABEL or any other HTML tag.
I gets complicated very quickly and if you have many screens there should be a lot more reuse possible.

I basically just want that the developer can do something like:

  <x:row><x:label>Label</x:label><x:field><w:TextBox ui:field='text'/></x:field></x:row>
  <x:row><x:label>Label 2</x:label><x:field><w:TextBox ui:field='text'></x:field></x:row>

So I need to be able to mix some plain HTML tags with some custom defined ones.

Is this the officially supported way of doing this ? There is no developer documentation available on this topic. 

There simply is no official way: https://code.google.com/p/google-web-toolkit/issues/detail?id=4461

Maybe you could use a RenderablePanel and IsRenderable widgets, but it's experimental: http://www.gwtproject.org/javadoc/latest/com/google/gwt/user/client/ui/IsRenderable.html
That said, in modern browsers (I know that you're unfortunately tied to older ones too), using widgets shouldn't really harm performance; the DOM has become quite fast recently (in some browsers, I've heard DOM manipulations can be faster than innerHTML)

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