unit1.pas

delphi实现的 放大镜功能delphi实现的 放大镜功能delphi实现的 放大镜功能

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, jpeg, StdCtrls;

type
  TForm1 = class(TForm)
    Image1: TImage;
    Image2: TImage;
    Label1: TLabel;
    procedure Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  StretchBlt(Image2.Canvas.Handle,0,0,Image2.Width,Image2.Height,
  Image1.Canvas.Handle, X-20,Y-20,40,40,SRCCOPY);
  Image2.Refresh;
  Screen.Cursors[1]:=LoadCursorFromFile('MAGNIFY.CUR');
  Self.Cursor:=1;
end;

procedure TForm1.FormMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Screen.Cursors[1]:=crDefault;
  Self.Cursor:=1;
end;

end.