Disabling empty data-bound SelectItems

[Phill]

Hi

I have a SelectItem in a form which I'd like to disable when there are no values displaying in it.

The data is loaded up from a datasource and then filtered on the client side (I've overriden getPickListFilterCriteria()) and everything seems to work fine.

The problem is, I'm having a really difficult time trying to get the number of options that are currently displayed when filtered - Smart GWT just doesn't seem to have that information anywhere.

Things I have tried so far:

- filterClientPickListData() - this seems to return null for data bound pick lists
- add a DataArrivedHandler and extract the ResultSet directly. However each method I seemed to call on the ResultSet that was a subclass of RecordList seemed to be broken, i.e. it came up with "self.getLength is not a function".

I can't believe that something which is seemingly so simple is so complicated to achieve. If anyone has any ideas I'd be very grateful.

Smart GWT version: 2.2
Browser: Firefox 3.6.6

Thanks,
Phill

[Isomorphic]

Have you already tried DataArrivedEvent.getEndRow() or are you saying that's not working?

Can you show a test case for this situation where you are seeing a problem with the ResultSet object?

[Phill]

Have you already tried DataArrivedEvent.getEndRow() or are you saying that's not working?

getEndRow does work, but the data is only loaded once - it's filtered on the client side. This is the issue you see, I need to get the number of options being displayed once the data has been filtered.

Can you show a test case for this situation where you are seeing a problem with the ResultSet object?

I don't have time to set up a green fields app, however if I add the following code into my form:

new SelectItem()
{
    private ResultSet _resultSet;

    {
        setName( "Test" );
        setTitle( "Testing" );
        setOptionDataSource( new ApplicabilityDataSource( 2 ) );

        addDataArrivedHandler( new DataArrivedHandler()
        {
            @Override
            public void onDataArrived( DataArrivedEvent event )
            {
                _resultSet = event.getData();
            }
        } );
    }


    @Override
    public void clearValue()
    {
        if (null != _resultSet)
        {
            _resultSet.setCriteria( getPickListFilterCriteria() );
            int length = _resultSet.getLength();
        }
    }

    @Override
    protected Criteria getPickListFilterCriteria()
    {
        Integer model = (Integer) CatalogueFilterForm.this.getValue( MODEL );

        if (null != model)
        {
            Criteria criteria = new Criteria( "hierId", model.toString() );

            return criteria;
        }

        return null;
    }
}

I get an error on the line _resultSet.getLength().

Uncaught exception escaped : com.google.gwt.core.client.JavaScriptException
(TypeError): self.getLength is not a function
 fileName: http://localhost:8000
 lineNumber: 190
 stack: ()@http://localhost:8000:190
@:0
([object GWTJavaObject],131108,[object GWTJavaObject])@http://localhost:8000/epc/hosted.html?epc:56
([object Object],[object Object],766134)@http://localhost:8000:456
((function () {var param = {form: arguments[0], item: arguments[1], value: arguments[2]};var event = __gwt_makeJavaInvoke(1)(null, 11665437, param);__gwt_makeJavaInvoke(1)(selfJ, 131108, event);}),[object Object],[object Object])@http://localhost:8000:6
@:0
(null,65560,(function () {var param = {form: arguments[0], item: arguments[1], value: arguments[2]};var event = __gwt_makeJavaInvoke(1)(null, 11665437, param);__gwt_makeJavaInvoke(1)(selfJ, 131108, event);}),[object Object],[object Object])@http://localhost:8000/epc/hosted.html?epc:56
[...]

[sjivan]

Confirmed the issue. This will be fixed shortly.

Sanjiv

[sjivan]

This has been fixed. Please pick up the latest nightly build.

Sanjiv