unit1.pas

本光盘是《Delphi 7应用教程》一书的配套光盘

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    MainMenu1: TMainMenu;
    File1: TMenuItem;
    Edit1: TMenuItem;
    New1: TMenuItem;
    Open1: TMenuItem;
    Save1: TMenuItem;
    Exit1: TMenuItem;
    Font1: TMenuItem;
    Memo1: TMemo;
    SaveDialog1: TSaveDialog;
    OpenDialog1: TOpenDialog;
    FontDialog1: TFontDialog;
    N1: TMenuItem;
    procedure New1Click(Sender: TObject);
    procedure Open1Click(Sender: TObject);
    procedure Save1Click(Sender: TObject);
    procedure Exit1Click(Sender: TObject);
    procedure Font1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
var
  FileName:String; //定义全局变量

{$R *.dfm}

procedure TForm1.New1Click(Sender: TObject);
begin
  if (Memo1.Modified)And(MessageDlg('Would you save the file?',mtConfirmation,
    mbYesNoCancel,0)=mrYes) then
    Save1.Click; //如果文档修改并愿意保存该文档就保存（相当于单击Save1.Click）
  Memo1.Clear;//清除文档，相当于新建一个文档
  FileName:='未命名文件';
  Form1.Caption:=FileName;//将文件名赋给窗体
end;

procedure TForm1.Open1Click(Sender: TObject);
begin
  if OpenDialog1.Execute then
    begin
      FileName:=OpenDialog1.FileName;
      Memo1.Lines.LoadFromFile(FileName);//调用LoadFromFile方法将文档读到
                                         //Memo1中
      Form1.Caption:=FileName;
    end;
end;

procedure TForm1.Save1Click(Sender: TObject);
begin
  if SaveDialog1.Execute then
    begin
      FileName:=SaveDialog1.FileName;
      Form1.Caption:=FileName;
      Memo1.Lines.SaveToFile(FileName);//调用SaveToFile方法保存文档
    end;
end;

procedure TForm1.Exit1Click(Sender: TObject);
begin
  Close;
end;

procedure TForm1.Font1Click(Sender: TObject);
begin
  if FontDialog1.Execute then
    Memo1.Font:=FontDialog1.Font;//将对话框的字体（名字、大小和颜色等）
                                 //赋给Memo1中的文本
end; 

end.