unit1.pas

用delphi开发的一个文本编辑器的实例

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    SaveDialog1: TSaveDialog;
    OpenDialog1: TOpenDialog;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    Button7: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
memo1.Lines.Add('在末端添加文本');
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
memo1.Lines.Text:='这里是Memo组件示例';
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
if Memo1.SelLength>0 then
   Memo1.CutToClipboard;
end;

procedure TForm1.Button5Click(Sender: TObject);
begin
if savedialog1.Execute then
memo1.Lines.SaveToFile(savedialog1.FileName);
end;

procedure TForm1.Button6Click(Sender: TObject);
begin
if Opendialog1.Execute then
memo1.Lines.LoadFromFile(opendialog1.FileName);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
if Memo1.SelLength>0 then
   Memo1.CopyToClipboard;
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
if Memo1.SelLength=0 then
   Memo1.PasteFromClipboard;
end;

procedure TForm1.Button7Click(Sender: TObject);
begin
close;
end;

end.