TTreeNodes.Assign procedure
Implements object persistence for the tree node container.
Declaration
procedure Assign(Source: TPersistent); overrideArguments
Source | Persistent object with the values copied in the method. |
Description
Assign is an overridden method in
TTreeNodes used to
copy values from the persistent object in Source to the current class
instance. Assign ensures that the cache for the container is cleared prior to
loading values from Source.
If Source is derived from TTreeNodes, the nodes in the container are cleared and recreated from the nodes in Source. Node information handled in the method includes:
- ImageIndex
- SelectedIndex
- OverlayIndex
- StateIndex
- Height
- Data pointer (depending on LCL version)
- Count
- Expanded
- Text
If Source is not derived from TTreeNodes, the inherited method is called to perform object persistence.
If Source is Nil, an EConvertError exception is raised.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.