如何修复Delphi组件与TFont属性,在设计时“无法将NIL分配给TFont

我已经开始在Delphi 6 Pro中构建一个新组件.目前它只有一个TFont发布的财产.但是,当我在设计时将组件放在Form上,并单击“textAttr_1”属性(省略号)的编辑按钮时,我得到一个异常,说“不能将NIL分配给TFont”.我做错了什么导致了这个错误？以下是组件的代码：

unit JvExtendedTextAttributes;

interface

uses
  Windows,Messages,SysUtils,Classes,JvRichEdit,Graphics;

type
  TJvExtendedTextAttributes = class(TComponent)
  private
    { Private declarations }
  protected
    { Protected declarations }
    FTextAttr_1: TFont;
  public
    { Public declarations }
    constructor Create(AOwner: TComponent);
  published
    { Published declarations }
    property textAttr_1: TFont read FTextAttr_1 write FTextAttr_1;
  end;

procedure Register;

implementation

procedure Register;
begin
  RegisterComponents('FAVORITES',[TJvExtendedTextAttributes]);
end;

// ---------------------------------------------------------------

constructor TJvExtendedTextAttributes.Create(AOwner: TComponent);
begin
    inherited Create(AOwner);

    FTextAttr_1 := TFont.Create;
end;

// ---------------------------------------------------------------


end.

property Font: TFont read FFont write SetFont;
...
procedure TMyComponent.SetFont(Value: TFont);
begin
  FFont.Assign(Value);
end;