Re: Cool little Coroutines function (Example of use)

Posted by Bart van der Werf

In Reply to Cool little Coroutines function posted by Bart van der Werf

unit Example;

interface

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

type
TCounter = class(TCoroutine)
protected
procedure Execute; override;
end;

TForm1 = class(TForm)
Button1: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
Counter: TCounter;
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

uses Math;

{$R *.dfm}

{ TCounter }

procedure TCounter.Execute;
var
i: Integer;
begin
for i := 0 to 4 do
begin
Form1.Memo1.Lines.Append(IntToStr(i));
Yield;
if IsTerminating then
Exit;
end;
raise Exception.Create('hi');
Form1.Memo1.Lines.Append('-done-');
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
Counter.Invoke;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
Counter := TCounter.Create;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
Counter.Free;
end;

end.