how to - programmatic control of datascroller

[x490812]

I wish to be able to programmatically control the rich:datascroller and can find no examples of how to do that; I want to move to the first row on certain conditions - as if I was hitting the [<< <<] button. How do I do that?

[mail.micke]

Hi

This post might help you:
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=125209

[daniel.soneira]

First, bind the control to a backing bean attribute in your jsp.

<rich:datascroller binding="${BackingBean.datascroller}"/>

After that u can use something like that (see function resetDatascroller):

public class BackingBean {
 private UIDatascroller datascroller;

 public UIDatascroller getDatascroller() {
 return datascroller;
 }

 public void setDatascroller(UIDatascroller datascroller) {
 this.datascroller = datascroller;
 }

 private void resetDatascroller() {
 datascroller.setPage(UIDatascroller.FIRST_FACET_NAME);
 }
}

This code snippet shows how to go to the first page of the responding scrollers datatable.

[x490812]

Thank you for the response - the problem I have had when trying to bind ANY richfaces component to a backing bean is

.
.
. at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Unknown Source)
Caused by: javax.el.ELException: /caseDetail.xhtml @510,47 binding="${caseManagement.datascroller}": java.lang.IllegalArgumentException: argument type mismatch
 at com.sun.facelets.el.TagValueExpression.setValue(TagValueExpression.java:101)
 at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:237)
 ... 65 more
Caused by: java.lang.IllegalArgumentException: argument type mismatch
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at javax.el.BeanELResolver.setValue(BeanELResolver.java:108)
 at javax.el.CompositeELResolver.setValue(CompositeELResolver.java:68)
 at com.sun.faces.el.FacesCompositeELResolver.setValue(FacesCompositeELResolver.java:93)
 at org.jboss.el.parser.AstPropertySuffix.setValue(AstPropertySuffix.java:73)
 at org.jboss.el.parser.AstValue.setValue(AstValue.java:84)
 at org.jboss.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:249)
 at com.sun.facelets.el.TagValueExpression.setValue(TagValueExpression.java:93)
 ... 66 more

Any ideas why that would happen?

[daniel.soneira]

Let us see your code regarding that datascroller in the backing bean.

Did you use org.richfaces.component.UIDatascroller as type?

I've used the code I described in my previous post EXACLTY as it is just some days ago and it works :]

You could of course just break on this IllegalArgumentException and look in the debugger what he is trying to pass as argument ;)

[x490812]

Thank you for your response! I have actually posted this in a little more detail in another entry. Here is the link http://www.jboss.com/index.html?module=bb&op=viewtopic&t=127411

If you have any ideas about why, I would love to hear them. What I can tell you is that I put a breapoint in the getter and setter. I am running a seam application, and when the XHTML page is parsed, it runs the getters for the EL expressions needed to render the page. When it gets to the getter for the datascroller is when I get the above error