TBaseVirtualTree.TotalInternalDataSize Property

Keeps the currently accumulated data size for one node.

property TotalInternalDataSize: Cardinal;

Each node in the tree not only supports user data but also an interal area where TVirtualBaseTree descentants can store their own data per node. This internal data area must be allocated by a tree class, that means it must register its need for internal data. The internal data size registered by each descendant is accumulated in the TotalInternalDataSize member and is used to compute the user data offset in the node record. 

Data handling

TBaseVirtualTree Class