Event that is triggered before cell (and grid) enters into editing mode. The event provides Accept parameter that can be set to block editing before it is started and Text parameter that can be used for adjusting text to be placed into in-place editor.

property OnBeforeEdit: TNxBeforeEditEvent read FOnBeforeEdit write FOnBeforeEdit;

Example

procedure TForm2.NextGrid61BeforeEdit(Sender: TObject; ACol, ARow: Integer;
  var Accept: Boolean; var Text: WideString);
begin
  if Text = '' then Accept := False;
end;