TShape -绘制事件上的绘制问题

procedure TForm1.FormCreate(Sender: TObject);
begin
  Shape1 := TShape.Create(Self);
  Shape1.Parent := Self;
  Shape1.Left := 10;
  Shape1.Top := 10;
  Shape1.Width := 100;
  Shape1.Height := 100;
  Shape1.Brush.Color := clRed;
end;

procedure TForm1.Shape1Paint(Sender: TObject; Canvas: TCanvas; const ARect: TRect);
begin
  // 自定义绘制代码
  Canvas.Brush.Color := clBlue;
  Canvas.FillRect(ARect);
  Canvas.Pen.Color := clWhite;
  Canvas.Rectangle(ARect);
end;

procedure TForm1.Shape1Resize(Sender: TObject);
begin
  Shape1.Invalidate;
end;

Shape1.ZOrder := 1; // 设置组件的 ZOrder

Shape1.Brush.Color := clRed;
Shape1.Pen.Color := clBlack;

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls;

type
  TForm1 = class(TForm)
    Shape1: TShape;
    procedure FormCreate(Sender: TObject);
    procedure Shape1Paint(Sender: TObject; Canvas: TCanvas; const ARect: TRect);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  Shape1 := TShape.Create(Self);
  Shape1.Parent := Self;
  Shape1.Left := 10;
  Shape1.Top := 10;
  Shape1.Width := 100;
  Shape1.Height := 100;
  Shape1.Brush.Color := clRed;
end;

procedure TForm1.Shape1Paint(Sender: TObject; Canvas: TCanvas; const ARect: TRect);
begin
  // 自定义绘制代码
  Canvas.Brush.Color := clBlue;
  Canvas.FillRect(ARect);
  Canvas.Pen.Color := clWhite;
  Canvas.Rectangle(ARect);
end;

end.