TcxTreeListIsGroupNodeEvent Type

The procedural type for node group state definition events.

Declaration

delphi

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:

TcxTreeListA control that displays data in a tree-like manner.TcxDBTreeListA data-aware Tree List control.TcxVirtualTreeListA TreeList control used in provider mode.

Tip

TO identify the tree list control type, call the Sender.ClassType function.

Provides access to the currently processed tree list node.

| | IsGroup | Boolean | TrueThe currently processed node (ANode) is a group node.FalseThe 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.