133a3b98d7
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@6147 8e941d3f-bd1b-0410-a28a-d453659cc2b4
144 lines
3.3 KiB
ObjectPascal
144 lines
3.3 KiB
ObjectPascal
(* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TurboPower SysTools
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*
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* The Initial Developer of the Original Code is
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* TurboPower Software
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*
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* Portions created by the Initial Developer are Copyright (C) 1996-2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** *)
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{$IFDEF FPC}
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{$mode DELPHI}
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{$ENDIF}
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unit Observer;
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interface
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uses
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{$IFNDEF FPC}
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Windows, Messages,
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{$ENDIF}
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SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
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StdCtrls, StPtrns, ExtCtrls;
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type
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TObserverForm = class(TForm)
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Panel1: TPanel;
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Button1: TButton;
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Edit1: TEdit;
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Label1: TLabel;
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Button2: TButton;
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Button3: TButton;
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Button4: TButton;
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procedure Edit1Change(Sender: TObject);
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procedure Button1Click(Sender: TObject);
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procedure Button2Click(Sender: TObject);
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procedure Button3Click(Sender: TObject);
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procedure Button4Click(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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procedure FormDestroy(Sender: TObject);
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private
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// Code for the observer
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{ Private declarations }
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public
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TheObserver: TStObserver;
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procedure ReceiveNotification1(WhatChanged: TObject);
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procedure ReceiveNotification2(WhatChanged: TObject);
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procedure ReceiveNotification3(WhatChanged: TObject);
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procedure ReceiveNotification4(WhatChanged: TObject);
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{ Public declarations }
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end;
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var
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ObserverForm: TObserverForm;
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implementation
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{$IFDEF FPC}
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{$R *.lfm}
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{$ELSE}
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{$R *.dfm}
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{$ENDIF}
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procedure TObserverForm.Edit1Change(Sender: TObject);
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begin
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TheObserver.Notify(TObject(Edit1.Text));
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end;
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procedure TObserverForm.ReceiveNotification1(WhatChanged: TObject);
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begin
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Button1.Caption := String(WhatChanged);
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end;
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procedure TObserverForm.ReceiveNotification2(WhatChanged: TObject);
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begin
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Button2.Caption := String(WhatChanged);
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end;
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procedure TObserverForm.ReceiveNotification3(WhatChanged: TObject);
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begin
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Button3.Caption := String(WhatChanged);
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end;
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procedure TObserverForm.ReceiveNotification4(WhatChanged: TObject);
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begin
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Button4.Caption := String(WhatChanged);
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end;
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procedure TObserverForm.Button1Click(Sender: TObject);
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begin
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Edit1.Text:= 'Reset 1';
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end;
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procedure TObserverForm.Button2Click(Sender: TObject);
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begin
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Edit1.Text:= 'Reset 2';
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end;
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procedure TObserverForm.Button3Click(Sender: TObject);
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begin
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Edit1.Text:= 'Reset 3';
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end;
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procedure TObserverForm.Button4Click(Sender: TObject);
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begin
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Edit1.Text:= 'Reset 4';
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end;
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procedure TObserverForm.FormCreate(Sender: TObject);
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begin
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TheObserver := TStObserver.Create;
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TheObserver.Add(ReceiveNotification1);
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TheObserver.Add(ReceiveNotification2);
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TheObserver.Add(ReceiveNotification3);
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TheObserver.Add(ReceiveNotification4);
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end;
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procedure TObserverForm.FormDestroy(Sender: TObject);
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begin
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TheObserver.Free;
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end;
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end.
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