Yes, of course. Sorry, for misleading you. My fault.
I simply forgot that the button and paginator links are not rendered my you, but by the datascroller directly. So, you cannot add an action listener, of course.
Well, I hope this should work:
Sub-class the HtmlDataScrollerRenderer, call it MyHtmlDataScrollerRenderer and register it as the default renderer for datascroller:
<renderer>
<component-family>javax.faces.Panel</component-family>
<renderer-type>org.apache.myfaces.DataScroller</renderer-type>
<renderer-class>ro.citrusmedia.lims.web.ui.util.MyHtmlDataScrollerRenderer</renderer-class>
</renderer>
Now in your MyHtmlDataScrollerRenderer overwrite the decode method:
public void decode(FacesContext context, UIComponent component)
{
super.decode(context, component);
UIData uiData = findUIData((HtmlDataScroller)component, component);
//Now use the getRows, getRowIndex methods to find out the current
//page and do some action...
}I hope this works, I have not tried it.
Of course, this would also be the place where one would queue a <hint>not yet existing</hint> PageSelectionEvent that later gets broadcasted to a <hint>also not yet existing</hint> PageSelectionListener, as you suggested. ;-)
Manfred
Catalin Kormos wrote:
Hi Manfred, thanks for your reply,
I'm afraid that i don't realy understand; adding an action listener to my scroll buttons, what this means exactly? i tryied using <f:actionListener>...like this:
<f:facet name="first" > <h:graphicImage url="../images/datascroller/arrow-first.jpg" border="0" /> <f:actionListener type="ro.citrusmedia.lims.web.ui.util.WebTableModel"/> </f:facet> but it trows the following exception: org.apache.jasper.JasperException: Component _id53 is no ActionSource
And what about the page indexes? the user can jump to a specific page using also the links to each page (1,2,3,...n), not just the navigation buttons.
When using the viewRoot's findComponent, i have to know the name (id) of the dataTable...which i don't (from my backend bean).
--- Manfred Geiler <[EMAIL PROTECTED]> wrote:
Catalin,
Add an action listener to your scroll buttons.
In this action listener get the data table component
(use findComponent of the viewRoot). The dataTable has all the (public)
properties you need:
- getRowCount() returns the total number of rows
- getRows() returns number of rows per page
- getFirst() returns the index of the current top
row
With some division and modulo it is easy to
calculate the current page number: see getPageIndex method in
HtmlDataScrollerRenderer.
Manfred
Catalin Kormos wrote:
--- "Korhonen, Kalle" <[EMAIL PROTECTED]> wrote:
-----Original Message-----
From: Catalin Kormos [mailto:[EMAIL PROTECTED] Subject: pageSelectionListener tag implementation
help needed
I have to tell that i'm very frustrated that
there
is no way
to find out the page selection change on a
dataTable that
displays rows on more than one page. Please correct me if i'm wrong.
Bind your dataScroller pageIndexVar to a property
in
your own bean, i.e. on the .jsp page: <x:dataScroller .... pageIndexVar="#{myTableBean.pageIndex}" </x:dataScroller>
And in your pageIndex's setter do whatever you needed to do when the page changes, e.g.
Public void setPageIndex(Integer pageIndex) {
if (pageIndex == null) return; if (!pageIndex.equals(this.pageIndex))
pageChanged();
this.pageIndex = pageIndex;
}
Would that work?
No, it does't work. The pageIndexVar represents
only a
name used by a bean which holds the page index
value,
that can be used inside the dataScroller tag;
(like
the var for dataTable). So, binding it like you
said,
only changes the name of that bean...(the bean's
name
which holds the actual value). Thanks anyway for
your
interest.
Any other ideeas?
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