DynamicBlock Part II - DynamicBlock now allows a Body
I've modified the DynamicBlock component to allow
it to wrap some other content. this means that you can use DynamicBlock to do
things like use a different PageBorder for different users with the same content
in the middle.RenderBlock cannot
contain a body, the Block it renders can, but if I want to put the same content
inside different blocks I would have to duplicate it or turn it into another
component. DynamicBlock makes the process a whole lot
easier.The changes I've made to
DynamicBlock allow me to declare it with a
body:
<span jwcid="switchBlock">
<p>
This is the body, wrapped by the switched component. I'm not sure if this should
really work and what effect, if any it has on page listeners, or component paths,
but it does render!
</p>
<p>
And to prove that components can be wrapped as well, todays date is:
<span jwcid="@Insert" value="ognl:script.calcTodaysDate()"/>.
</p>
</span>
The specification stays the
same:
<component id="switchBlock" type="DynamicBlock">
<binding name="componentName" expression="selectedComponentName" />
</component>
The components rendered by DynamicBlock
(names bound to the
componentName
parameter) must allow a body and include a
RenderBody
component:
<span jwcid="$content$">
<h1>1</h1>
<span jwcid="@RenderBody"/>
</span>
Looking at the code changes I have made to
get this to work, I'm not exactly sure why it works, but it does do what I want
it to do. Perhaps someone who knows the guts of the Tapestry component body
rendering process better than me can review the source code and see if there are
any side effects to this.I have
uploaded a modified example application and
source-code.This DynamicBlock is a
little less bare-bones, I still need to figure out how to pass parameters from
the DynamicBlock to the component.See
the updated example at: http://examples.mjhenderson.com/dynamicblock/app
Get the source code: dynamicblock-with-body-src.tgz
Posted: Mon - September 6, 2004 at 03:09 PM
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