<rich:datascroller>: Reset of page index after re-rendering

[ma.aqcon]

Hi everyone,

I have a question regarding <rich:datascroller>...

I have the following use case:
- User enters some filter criteria and clicks a button to display data in a dataTable
- Data table is displayed, datascroller shows 10 pages
- User selects e.g. page index 7 of 10
- User changes the filter criteria and clicks the button again (New result has only e.g. 3 pages)
- Data table is empty because the page index stil seems to be set to 7, the user has to select page 1/2/3 manually ...

My question: Is there a way to set back the page index to 1?

Thanks in advance&Regards
Michael

[sri_hari]

set the first attribute of the data table to 0

[ma.aqcon]

Thanks for your response.

I did a quick test without success but I will do some further investigation ...

[daniel.soneira]

First - bind your datascroller into the backing bean.

JSP:

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

Then - in your search action you can invoke the method resetDatascroller described below.

Here is the Backing bean:

private UIDatascroller datascroller;

public UIDatascroller getDatascroller() {
 return datascroller;
}

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

private void resetDatascroller() {
 logger.debug("resetDatascroller");
 if (datascroller != null) {
 datascroller.setPage(UIDatascroller.FIRST_FACET_NAME);
 }
}

If one of the developers happens to read this - I don't know if this has been changed in 3.2.0 (I work with 3.1.5) - but could you please put a similar code snippet into the developer documentation for the datascroller. I guess this is a very common issue that almost everyone using a datascroller encounters very quickly.

[ma.aqcon]

Thanks, Daniel! Your solution works fine for me!

I have only two minor additions.
JSP should be

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

This version of setPage is deprecated (probably in 3.2.0):

 datascroller.setPage(UIDatascroller.FIRST_FACET_NAME);

And is replaced by a version with an integer argument:

 datascroller.setPage(1);

[ma.aqcon]

This does not work with the latest 3.2.1GA anymore :-(

[mchisty]

This is a weird behaviour of RichFaces. However the following solution also works (you don't even have to bind with UIDatascroller) 

Here is the java code snippet: WorkflowMaintain.java 

private int page; 

public int getPage() {  return page; }       

public void setPage(int page) { this.page = page; } 

public void someActionMethod() { this.page=1; } 

In page: mypage.xhtml 

<rich:datascroller

                              for="workflow_item_datatable"

                              id="search_result_ds"

                              page="#{workflowMaintain.page}" />

When re-rendering and calling the action method (someActionMethod), you just set the page variable to 1.  

Thanks,

.. Chisty