Re: [T5] BeanEditForm and Grid: how to add to (decorate) the default renderer of a field?

[Michael Capper <mj...@avetana.de>]

Done it like this (in a grid, but that's basically the same):

implemented our own GridCell (copy-pasted all of AbstractPropertyEditor and
original GridCell for visibility reasons), but changed these two methods:
	Object beginRender(MarkupWriter writer)
	{

		Object before = renderPropertyValue(writer, getPropertyModel().getId()
													+ "BeforeCell", false);
		Object main = renderPropertyValue(writer, getPropertyModel().getId()
													+ "Cell", true);
		Object after = renderPropertyValue(writer, getPropertyModel().getId()
													+ "AfterCell", false);
		if (main instanceof BlockImpl)
		{
			BlockImpl bi = (BlockImpl) main;
			BlockImpl result = new BlockImpl(bi.getLocation(),
				"multiblock");
			if (before != null && before instanceof BlockImpl)
			{
				result.addToBody((BlockImpl) before);
			}
			result.addToBody(bi);
			if (after != null && after instanceof BlockImpl)
			{
				result.addToBody((BlockImpl) after);
			}
			return result;
		}
		return main;
	}

	protected Object renderPropertyValue(MarkupWriter writer,
					String overrideBlockId, boolean showdefault)
	{
		Block override = overrides.getOverrideBlock(overrideBlockId);
		String datatype = model.getDataType();
		if (override != null)
		{
			Debug.debug("overrideBlock=" + override);
			Block ov = override;
			return override;
		}
		if (showdefault)
		{
			[snip...]
			// Don't render anything else
			return false;
		}
		return null;
	}


where formerly I'd write
		<t:parameter name="lastloggedinBeforeCell">
			i'm your decoration ${originalValue}
		</t:parameter>
in the Component Template now I use
		<t:parameter name="lastloggedinBeforeCell">
			i'm your decoration
		</t:parameter>



I have yet to "wrap" an Actionlink around it, I probably have to split the
ActionLink-Component into two, one before and one after the main BlockImpl,
opening and closing the Link respectively.

Howard Lewis Ship wrote:
> 
> You might be able to accomplish this using a local property override
> and a PropertyEditor component to "drag in" the default property
> editor block.
> 
> Maybe this will help somebody sometime :)
> 
> Mike
> 
> On Wed, Jul 16, 2008 at 4:02 AM, Michael Capper <mj...@avetana.de>
> wrote:
>>
>> Hi,
>> i want to decorate some fields of a BeanEditForm in use. With decorate i
>> mean keep the old but wrap some html around it (e.g. a <hr/>, or wrap it
>> in
>> a ) like
>>
>> <t:BeanEditForm....>
>>  <t:parameter name="firstgroupitem">
>>    <hr/>
>>    <t:body/>
>>  </t:parameter>
>>  ...
>> </t:BeanEditForm>
>>
>> Consider the <t:body/> as a placeholder for whatever would render the
>> original data.
>>
> 

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