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;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
// Canvas是画布
  Canvas.MoveTo(0,0);    //MoveTo 将画笔移到
  Canvas.LineTo(200,20);   //LineTo 画线到
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  Canvas.Rectangle(20,40,200,70);
  //画矩形，4个数字分别是左上角、右下角的x,y坐标
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  Canvas.Ellipse(20,40,200,70);
  //画椭圆，4个数字分别是外围的矩形的左上角、右下角的x,y坐标
end;

end.