Description:
Hi,

I try to use the SortableGridDataModel[1] service with the help of my own XMutableGridDataModel[2] interface implementation (ie: the delegator).

After creating the service SortableGridDataModel, when initializing with the XMutableGridDataModel delegator, an XGridDataListener listener tries to register to the delegator with the method addGridDataListener(). But it seems that this listener does not have the required interface XGridDataListener (ie: getTypes() does not return XGridDataListener)

If I look at the source code and more precisely the file libreoffice/toolkit/source/controls/grid/sortablegriddatamodel.cxx[3] it appears the attempt to add the listener line 318[4], but it seems to me that the type XGridDataListener is excluded from the types to return line 271[5].

As a result, if we try to use the SortableGridDataModel service any change in the content of the Grid cannot be notified to this service (ie: the registered listener does not have the XGridDataListener interface, we cannot notify it).
And it results that the management of vertical scroll bars is not supported (ie: scroll bars do not follow the number of rows in the Grid)

As a test, if I include type XGridDataListener in the types returned by getTypes() then it is possible to notify the changes of the delegator and the scroll bar becomes operative.

I will propose a pull request.


[1]: https://www.openoffice.org/api/docs/common/ref/com/sun/star/awt/grid/SortableGridDataModel.html
[2]: https://www.openoffice.org/api/docs/common/ref/com/sun/star/awt/grid/XMutableGridDataModel.html
[3]: https://github.com/LibreOffice/core/blob/master/toolkit/source/controls/grid/sortablegriddatamodel.cxx
[4]: https://github.com/LibreOffice/core/blob/master/toolkit/source/controls/grid/sortablegriddatamodel.cxx#L318
[5]: https://github.com/LibreOffice/core/blob/master/toolkit/source/controls/grid/sortablegriddatamodel.cxx#L271


Steps to Reproduce:
Use the SortableGridDataModel service with the help of your own XMutableGridDataModel (ie: the delegator).

Actual Results:
The SortableGridDataModel service cannot be notified of changes by the delegator.

Expected Results:
The SortableGridDataModel service must be able to be notified of changes by the delegator.


Reproducible: Always


User Profile Reset: No

Additional Info:
if I change the getTypes method of the service SortableGridDataModel then everything works fine.


    Sequence< Type > SAL_CALL SortableGridDataModel::getTypes(  )
    {
        // don't expose the types got via SortableGridDataModel_PrivateBase - they're private, after all
        // No: if we want to be able to be notified of changes coming from the delagator
        // then we need to return the XGridDataListener interface too
        return ::comphelper::concatSequences(
            SortableGridDataModel_Base::getTypes(),
            SortableGridDataModel_PrivateBase::getTypes()
        );
    }