wxScrolled<T>::GetSizeAvailableForScrollTarget() method to compute the size
available for the scroll target as function of the main window size, please
see the documentation of this method for more details.
+
+- Signatures of wxDataViewCustomRenderer::Activate(),
+ wxDataViewCustomRenderer::LeftClick() and
+ wxDataViewCustomRenderer::StartDrag() virtual methods changed. You will need
+ to change them in your derived renderer class too if you override them.
+
*/