unit1.pas

DELPHI经典程序

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    GroupBox1: TGroupBox;
    Button1: TButton;
    Edit1: TEdit;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button7: TButton;
    Button8: TButton;
    Button6: TButton;
    Memo2: TMemo;
    Label1: TLabel;
    GroupBox2: TGroupBox;
    Button9: TButton;
    Button10: TButton;
    Label2: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
    procedure Button8Click(Sender: TObject);
    procedure Memo1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Button9Click(Sender: TObject);
    procedure Button10Click(Sender: TObject);
    procedure Memo1Change(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
  var
    n1:Integer;
begin
    n1 := Memo1.Lines.Add( Edit1.Text );
    ShowMessage('新增在第 ' + IntToStr(n1+1) + ' 行');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
    Memo1.Lines.Append( Edit1.Text );
end;

procedure TForm1.Button3Click(Sender: TObject);
 var
   receStr : String;
begin
   receStr := InputBox('Input Box', '要插入在第几行    ', '0');
   Memo1.Lines.Insert( StrToInt(receStr), Edit1.Text);
end;

procedure TForm1.Button4Click(Sender: TObject);
 var
   deleLine : String;
begin
   deleLine := InputBox('Input Box', '要删除第几行    ', '0');
   Memo1.Lines.Delete( StrToInt(deleLine));
end;

procedure TForm1.Button5Click(Sender: TObject);
begin
   Memo1.Lines.Clear;
end;

procedure TForm1.Button6Click(Sender: TObject);
  var
    a :Integer;
begin
    for a := 0 to Memo1.Lines.Count-1 do
      begin
        Memo1.Lines.Move(0,Memo1.Lines.Count-a-1)
      end;
end;

procedure TForm1.Button7Click(Sender: TObject);
 var
   fileStr : String;
begin
   fileStr := InputBox('Input Box', '要存档档名    ', '.\testfile.txt');
   Memo1.Lines.SaveToFile( fileStr );
end;

procedure TForm1.Button8Click(Sender: TObject);
 var
   fileStr : String;
begin
   fileStr := InputBox('Input Box', '要载入的档名    ', '.\testfile.txt');
   Memo1.Lines.LoadFromFile( fileStr );
end;

procedure TForm1.Memo1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
    if ( Length(Trim(Memo1.Lines.Strings[ Memo1.CaretPos.y ]))>0 ) then
       Memo2.Lines.Add( Memo1.Lines.Strings[ Memo1.CaretPos.y ] );
end;

procedure TForm1.Button9Click(Sender: TObject);
begin
    Memo1.WantReturns := not Memo1.WantReturns;
    if (Memo1.WantReturns) then
      Button9.Caption := 'WantReturns T'
     else
      Button9.Caption := 'WantReturns F';
end;
procedure TForm1.Button10Click(Sender: TObject);
begin
    Memo1.WantTabs := not Memo1.WantTabs;
    if (Memo1.WantTabs) then
      Button10.Caption := 'WantTabs T'
     else
      Button10.Caption := 'WantTabs F';
end;

procedure TForm1.Memo1Change(Sender: TObject);
begin
   Label2.Caption := Memo1.Text;
end;

end.