TcxTreeListIsGroupNodeEvent Type

The procedural type for node group state definition events.

Declaration

TcxTreeListIsGroupNodeEvent = procedure(Sender: TcxCustomTreeList; ANode: TcxTreeListNode; var IsGroup: Boolean) of object;

Name	Type	Description
Sender	TcxCustomTreeList	Provides access to the tree list control that raised the current node group state definition event. To access all public API members, cast the `Sender` parameter value to one of the following classes depending on the actual tree list type: TcxTreeList A control that displays data in a tree-like manner. TcxDBTreeList A data-aware version of the TreeList control. TcxVirtualTreeList A TreeList control used in provider mode. Tip TO identify the tree list control type, call the `Sender`.ClassType function.
ANode	TcxTreeListNode	Provides access to the currently processed tree list node.
IsGroup	Boolean	If `True`, the currently processed node (`ANode`) is a group node. If `False`, the currently processed node is an ordinary node.

This event occurs every time a tree list control is about to determine the group state of a node.

The TcxCustomTreeList.OnIsGroupNode event references the TcxTreeListIsGroupNodeEvent procedural type.