Re: Data scroller with bound variables for pageCountVar and pageIndexVar

[Travis Reeder]

The reason why I thought it would behave like ascending and sortBy is 
that if you have a very large data set, you probably don't want to load 
the whole set and let the datatable/datascroller handle it.  I just 
wanted to grab say 50 records and show them.  So I was setting the 
pagecount and then passing only the 50 records to show based on the 
pageIndex variable. 

I think this type of functionality should be in datascroller the way I 
was using it so that you can handle extremely large data sets. 

Travis
Korhonen, Kalle wrote:
Paginator, like the name sort of suggests, creates page links (e.g. 234
5 678) between prev and next page links.
Kalle 

________________________________
	From: Travis Reeder [mailto:[EMAIL PROTECTED] 
	Sent: Tuesday, December 14, 2004 6:37 PM
	To: MyFaces Discussion
	Subject: Re: Data scroller with bound variables for pageCountVar
and pageIndexVar
	
	
	Oh jeez, my bad, I just figured out how this is supposed to
work, I didn't realize it did most of the work for you.
	
	What's the paginator all about?
	
	Travis
	
	Travis Reeder wrote: 

		Ok, 
		
		I tried it by binding like so:
		
		pageCountVar="#{myBean.pageCount}"
		pageIndexVar="#{myBean.pageIndex}"
		
		Both Integers, but I get this.  
		
		java.lang.ClassCastException: java.lang.Integer
		    at
org.apache.myfaces.custom.datascroller.HtmlDataScroller.getPageCountVar(
HtmlDataScroller.java:185)
		    at
org.apache.myfaces.custom.datascroller.HtmlDataScrollerRenderer.encodeCh
ildren(HtmlDataScrollerRenderer.java:171)
		    at
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.jav
a:317)
		    at
javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:370
)
		
		Can someone explain how those are supposed to work?  My
assumption is that they are just like sortBy and ascending in
x:dataTable where if I click on it, those variables get set
appropriately.  For example, if i click on forward one in the data
scroller, I would expect the pageIndexVar to be incremented by one.  Is
this not the case?  
		
		The classcast is here, because it's expecting a string.
		
		    if (_pageIndexVar != null) return _pageIndexVar;
		        ValueBinding vb =
getValueBinding("pageIndexVar");
		        return vb != null ?
(String)vb.getValue(getFacesContext()) : null;
		
		Travis
		
		
		
		Korhonen, Kalle wrote: 

			I haven't tried pageCountVar, and I don't see
how binding it to a
			property would be useful, as the bean should
already be the source of
			the table data and thus should know the count,
but I'm using
			pageIndexVar exactly like that and I don't need
to guess; I *know* it
			works.
			
			Kalle 
			
			  

				-----Original Message-----
				From: Catalin Kormos
[mailto:[EMAIL PROTECTED] 
				Sent: Thursday, December 09, 2004 12:25
AM
				To: MyFaces Discussion
				Subject: RE: Data scroller with bound
variables for 
				pageCountVar and pageIndexVar
				
				And it works? i guess it does't. To
reset the dataTable to 
				the first page, or any page, there is
the "first" attribute 
				for the dataTable which can be bound to
a bean property.
				
				The attributes "pageIndexVar" and
"pageCountVar" of the 
				dataScroller are like the "var"
attribute of the dataTable, 
				you can use the value of them inside the
dataScroller.
				
				<x:dataScroller id="scroll_2"
				                for="data"
	
pageCountVar="#{myBean.count}"        
				                  
	
pageIndexVar="#{myBean.index}">
				
				
				--- "Korhonen, Kalle"
<[EMAIL PROTECTED]> <mailto:[EMAIL PROTECTED]>  wrote:
				
				    

					Can't? I'm using pageIndexVar
bound to a bean property exactly like 
					that, to reset to the first page
etc.
					
					Kalle
					
					      

					-----Original Message-----
					From: Travis Reeder
					        

	
[mailto:[EMAIL PROTECTED]
					      

					Sent: Thursday, December 09,
2004 12:00 AM
					To:
[EMAIL PROTECTED]
					Subject: Data scroller with
bound variables for
					        

					pageCountVar
					      

					and pageIndexVar
					
					Is there any reason pageCountVar
and pageIndexVar
					        

					can't be
					      

					bound to a value like sortColumn
and sortAscending
					        

					are in the
					      

					x:dataTable ?  for
					example:
					<x:dataScroller id="scroll_2"
	
for="data"
					                           
					        

					pageCountVar="#{myBean.count}"
					      

					                           
					        

					pageIndexVar="#{myBean.index}"
					      

					                            >
					
					
					--
					Travis Reeder
					Ecommstats Web Analytics
					
					
					        

						
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		Travis Reeder
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