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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls;
type
IEvents = interface
['{XXXXXX...}']
procedure UpdateStringList;
procedure OnFin(var Stop: Boolean);
end;
TMonTimer = class(TTimer)
private
fEvents: IEvents;
fCount: integer;
procedure Fake(Sender: TObject);
protected
procedure Timer; override;
public
constructor Create(const AEvents: IEvents); reintroduce;
end;
TForm1 = class(TForm, IEvents)
mmo1: TMemo;
private
fMonTimer: TMonTimer;
fStringList: TStringList;
protected
procedure UpdateStringList;
procedure OnFin(var Stop: Boolean);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
{ TMonTimer }
constructor TMonTimer.Create(const AEvents: IEvents);
begin
fEvents := AEvents;
fCount := 0;
inherited Create(nil);
OnTimer := Fake;
end;
procedure TMonTimer.Fake(Sender: TObject);
begin
end;
procedure TMonTimer.Timer;
var
Stop: Boolean;
begin
inherited;
if assigned(fEvents) then
begin
fEvents.UpdateStringList;
if fCount = 10 then
fEvents.OnFin(Stop);
if Stop then Enabled := False;
Inc(fCount);
end;
end;
{ TForm1 }
constructor TForm1.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
mmo1.Lines.Clear;
fStringList := TStringList.Create;
fMonTimer := TMonTimer.Create(Self);
fMonTimer.Interval := 500;
end;
destructor TForm1.Destroy;
begin
fMonTimer.Free;
inherited Destroy;
end;
procedure TForm1.OnFin(var Stop: Boolean);
begin
mmo1.Lines.Add('fin');
Stop := True;
end;
procedure TForm1.UpdateStringList;
begin
mmo1.Lines.Add(IntToStr(Random(5000)));
end; |
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