mainform.pas

外国人写的各种类型的源代码,有兴趣的朋友看看吧！是学习的好东西哟

unit MainForm;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
    PT: TPainterThread;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
  Button1.Enabled := False;
  Button2.Enabled := True;
  PT := TPainterThread.Create (False);  // start
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  PT.Free;
  Button1.Enabled := True;
  Button2.Enabled := False;
end;

procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Canvas.Pen.Color := Color; // of the form
  Canvas.Brush.Color := Color;
  Canvas.Ellipse (x - 30, y - 30, x + 30, y + 30);
end;

end.