[OpenAjaxIDE] [OpenAjaxGadgets] Widget constructors - property bag *not* passed

Howard Weingram weingram at tibco.com
Wed Aug 13 17:06:25 PDT 2008


I am not sure about this, Jon.
 
The property bag being passed in could include properties
(such as local security callbacks) that are not intended for 
external advertisement.
 
Could we please leave this in here for now? Thanks.
 
hw


________________________________

	From: gadgets-bounces at openajax.org
[mailto:gadgets-bounces at openajax.org] On Behalf Of Jon Ferraiolo
	Sent: Wednesday, August 13, 2008 1:07 PM
	To: ide at openajax.org; gadgets at openajax.org
	Subject: [OpenAjaxGadgets] Widget constructors - property bag
*not* passed
	
	

	As we worked on the reference implementation, we discovered that
there was no need to pass a property bag to the widget constructor, as
we have talked about in the past. The widget can simply call
widgetwrapper.getPropertyValue() for any property values that it needs,
and can make the call to getPropertyValue() at the time when the widget
needs the information. Another approach to getting property values is to
take advantage of the @@foo@@ macro substitution feature by including
something like <javascript>var
backgroundcolor='@@bgcolor@@';</javascript>
	
	In our reference implementation, we maintain copies of property
values on both sides (i.e., one copy in the mashup editor and one copy
in the widget itself), so when a widget calls getPropertyValue(), there
is negligible performance impact. It seems likely that other
implementations would use a similar approach.
	
	Does anyone see any problems with removing the preliminary
section in the spec (i.e., still has red-colored comments) that talks
about passing the property bag to the widget constructor? To me, this is
a vestigial section that no longer makes sense. Here is the section of
the spec that I propose to remove:
	
	*
http://www.openajax.org/member/wiki/OpenAjax_Metadata_Specification_Widg
et_Metadata#Widget_properties_and_widget_constructor_arguments
	
	If no one objects by the end of the week, I'll remove this
section.
	
	Jon
	
	
	
	
	

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