TTreeNodeExpandedState class

In unit ComCtrls

Class used to save and restore the expanded state of a TTreeView.

Declaration

pascal

TTreeNodeExpandedState = class

Description

TTreeNodeExpandedState is a class used to save and restore the expanded state of a TTreeView. The nodes are identified by their Text property.

Usage example:

// save old expanded state
OldExpanded := TTreeNodeExpandedState.Create(ATreeView);
// ... change a lot of nodes ...
// restore old expanded state
OldExpanded.Apply(ATreeView);
OldExpanded.Free;

Methods

`Create`	public	Constructor for the class instance.
`Destroy`	public	Destructor for the class instance.
`Clear`	public	Clear the expanded nodes for the tree structure.
`CreateChildNodes`	public	CreateChildNodes - constructor for the child nodes.
`Apply`	public	Used to restore the expanded state for a node or tree view.

Events

OnGetNodeText public Event handler signalled to get the text for the specified tree node.

Fields

`NodeText`	public	NodeText - the text in the current node.
`Children`	public	Children - the children of the current node, as an AvgLvlTree.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.