Reference TSceneMouseArgs

  TSceneMouseArgs = record
  public
    { The button causing the event, buttonNone for moves }
    Button: TSceneButton;
    { The mouse position and its change since the last mouse event }
    X: Float;
    Y: Float;
    XRel: Float;
    YRel: Float;
    { State of the modifier keys }
    Shift: TShiftKeys;
    Handled: Boolean;
  end;