unit1.pas

学习Delphi最好的教材。通过一个个简单而实用的实例

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Timer1: TTimer;
    Label1: TLabel;
    Button5: TButton;
    Shape1: TShape;
    procedure Timer1Timer(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Timer1Timer(Sender: TObject);
begin
  if Label1.Caption='向上' then
    Shape1.Top:=Shape1.Top-5;
  if Label1.Caption='向左' then
    Shape1.Left:=Shape1.Left-5;
    if Label1.caption='向右'    then
    Shape1.left:=Shape1.left+5;
    if Label1.caption='向下' then
    Shape1.Top:=Shape1.Top+5;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Label1.Caption:='向上';
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  Label1.Caption:='向左';
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
    Label1.caption:='向右';
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
Label1.caption:='向下';
end;

procedure TForm1.Button5Click(Sender: TObject);
begin
  Label1.Caption:='停止';
end;

end.