ScrollableDataTable multiple and single row selection config

[bdillon]

Hi,

The RichFaces ScrollableDataTable supports multiple and single row selection. How is this configured ? Currently I can only get it to work with multiple selection.

Thanks,

Brian

[victoria122]

Hi bdillon,

Can I ask how you managed to make it multi-selectable?? Only I've been struggling with this for some time!

Thanks
Victoria

[bdillon]

Victoria,

The table allows multiple selection by default. I presume that your issue is with the 'selection' attribute ?

Anyway if this is what the issue is then this is how I got it working with our stuff;

In the xhtml specify the selection attribute to reference an attribute on your backing bean.

<rich:scrollableDataTable ......... value="${dataList}" selection="#{backingBean.selection}">

In the backing bean have something like ;

public class DataTableBB {


List dataList;/** List of the Data to Display **/

//List of the rows which are selected !
List selectRows = new ArrayList();

/**
* Get the RichFaces SimpleSelection object (used to store row selections)
* Called by RichFaces framework !
* @return SimpleSelection
*/
public SimpleSelection getSelection() {
return new SimpleSelection();
}

/**
* Set the RichFaces SimpleSelection object
* Called by RichFaces framework !
* @param selection
*/
public void setSelection(SimpleSelection selection) {
Iterator iterator = selection.getKeys();
while (iterator.hasNext()){
SimpleRowKey key = iterator.next();
//Add the selected row to the list
selectRows.add(key.intValue());
// if you wish to access the data for this row you could call
// dataList.get(key.intValue())
// and add that to a diffent list
}
}


I originally looked at maintaining the SimpleSelection object as the variable (see the following example https://labs.jboss.com/authsec/wiki/en//RichFacesCookbook/ScrollableDataTableSelectionUsage ) but kept getting Serialization exceptions so needed to work around it.

Thanks,

Brian

[victoria122]

Hi Brian,

Thank you. That makes more sense than the binding="", which was throwing the error you mentioned. I hadn't even noticed that you could select many rows.. (blonde moment). I can't seem to find a single select option in the docs, but I have effectively made it single select by wiping the ArrayList on every iteration (Could just use: Packet selectedPacket = new Packet();)

Iterator iterator = selection.getKeys();
 while (iterator.hasNext())
 {
 SimpleRowKey key = (SimpleRowKey) iterator.next();
 //Add the selected row to the list
 //selectRows.add(key.intValue());
 // if you wish to access the data for this row you could call
 selectedPackets = new ArrayList<Packet>();
 selectedPackets.add( this.matchingPackets.get(key.intValue()) );
 }

This would probably confuse the user though.
One major disadvantage of the SimpleSelection is that it seems to be a click behind? I click on line 4 (for example) and it tells me nothing is selected. Next I click on line 8 and it tells me 4 is selected...
I am using the SimpleSelection along with the <a4j:support tag though, so I do have the current selected row from the support tag.

Thank you
Victoria

[nohacks]

Hi Brian and Victoria,

How did you fix your issue with single select?

I ask this because I have the same issue. I have a datagrid and would like to allow user to delete selected rows.

Thanks
Phil

[nohacks]

Any help out there??

Selection on a dataGrid??

Phil