[Overview][Constants][Types][Classes][Procedures and functions][Index] |
Specifies an event handler signalled when a tree node is about to be changed.
Source position: comctrls.pp line 2889
type TTVChangingEvent = procedure( |
Sender: TObject; |
Node: TTreeNode; |
var AllowChange: Boolean |
) of object; |
Sender |
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Object for the event notification. |
TTVChangingEvent is an object procedure type which specifies an event handler signalled when a tree node is about to be changed. TTVChangingEvent is the type used to implement the TCustomTreeView.OnChanging property.
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OnChanging - specialized event handler while TreeView is being changed. |
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Specifies an event handler signalled when a tree node has been changed. |