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Observing the world - how to build a reuseable implementation of a design pattern

, 11 Jun 2001 82.5K 316 84
An article about the techniques to pour reusable design (a design pattern) into reusable code with an example of the observer pattern.
//Microsoft Developer Studio generated resource script.
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#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "afxres.h"

/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
// German (Germany) resources

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LANGUAGE LANG_GERMAN, SUBLANG_GERMAN
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#endif //_WIN32

#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
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1 TEXTINCLUDE DISCARDABLE 
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2 TEXTINCLUDE DISCARDABLE 
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3 TEXTINCLUDE DISCARDABLE 
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    "#endif //_WIN32\r\n"
    "#include ""res\\Observer_Demo.rc2""  // non-Microsoft Visual C++ edited resources\r\n"
    "#include ""afxres.rc""         // Standard components\r\n"
    "#endif\r\n"
    "\0"
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#endif    // APSTUDIO_INVOKED


/////////////////////////////////////////////////////////////////////////////
//
// Icon
//

// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
IDR_MAINFRAME           ICON    DISCARDABLE     "res\\Observer_Demo.ico"
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/////////////////////////////////////////////////////////////////////////////


/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32

/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//

IDD_OBSERVER_DEMO_DIALOG DIALOGEX 0, 0, 320, 200
STYLE DS_MODALFRAME | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_APPWINDOW
CAPTION "Observer Demo (not that useful...)"
FONT 8, "MS Sans Serif"
BEGIN
    DEFPUSHBUTTON   "Close",IDOK,260,7,50,14
    EDITTEXT        IDE_OUTPUT,7,107,306,86,ES_MULTILINE | ES_AUTOVSCROLL | 
                    ES_AUTOHSCROLL
    GROUPBOX        "Temperature Sensor",IDC_STATIC,7,7,94,77
    EDITTEXT        IDE_TEMP,37,20,40,14,ES_AUTOHSCROLL
    LTEXT           "Temp:",IDC_STATIC,13,23,21,8
    PUSHBUTTON      "Set",IDB_APPLY_TEMP,78,21,16,12
    PUSHBUTTON      "Power failure",IDB_POWER,37,40,57,14
    PUSHBUTTON      "Other failure",IDB_OTHER,37,58,57,14
    GROUPBOX        "Hurricane Detector",IDC_STATIC,106,7,113,77
    EDITTEXT        IDE_THRESH,171,20,26,14,ES_AUTOHSCROLL
    LTEXT           "Temp. treshhold:",IDC_STATIC,116,23,54,8
    PUSHBUTTON      "Set",IDB_APPLY_TRESH,198,21,16,12
    GROUPBOX        "Strategy",IDC_STATIC,222,43,91,40
    PUSHBUTTON      "New Strategy",IDB_NEWSTRATEGY,247,58,55,14
    LTEXT           "Output:",IDC_STATIC,9,98,24,8
END


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#ifdef _DEBUG
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 FILEOS 0x4L
 FILETYPE 0x1L
 FILESUBTYPE 0x0L
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "040904B0"
        BEGIN
            VALUE "CompanyName", "\0"
            VALUE "FileDescription", "Observer_Demo MFC Application\0"
            VALUE "FileVersion", "1, 0, 0, 1\0"
            VALUE "InternalName", "Observer_Demo\0"
            VALUE "LegalCopyright", "Copyright (C) 2001\0"
            VALUE "LegalTrademarks", "\0"
            VALUE "OriginalFilename", "Observer_Demo.EXE\0"
            VALUE "ProductName", "Observer_Demo Application\0"
            VALUE "ProductVersion", "1, 0, 0, 1\0"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x409, 1200
    END
END

#endif    // !_MAC


/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//

#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO DISCARDABLE 
BEGIN
    IDD_OBSERVER_DEMO_DIALOG, DIALOG
    BEGIN
        LEFTMARGIN, 7
        RIGHTMARGIN, 313
        TOPMARGIN, 7
        BOTTOMMARGIN, 193
    END
END
#endif    // APSTUDIO_INVOKED

#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////



#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
#define _AFX_NO_SPLITTER_RESOURCES
#define _AFX_NO_OLE_RESOURCES
#define _AFX_NO_TRACKER_RESOURCES
#define _AFX_NO_PROPERTY_RESOURCES

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE 9, 1
#pragma code_page(1252)
#endif //_WIN32
#include "res\Observer_Demo.rc2"  // non-Microsoft Visual C++ edited resources
#include "afxres.rc"         // Standard components
#endif

/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

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About the Author

Daniel Lohmann
Germany Germany
Daniel Lohmann (daniel@losoft.de) is Assistant Professor at the Distributed Systems and Operating Systems department at Friedrich-Alexander-University Erlangen-Nuremberg, Germany. His main research topic is the design of a highly customizable and scalable operating system product line for deeply embedded systems using static configuration and aspect-oriented techniques. Before joining Universität Erlangen he worked as a freelance trainer and consultant for NT system programming, advanced C++ programming and OOA/OOD. He is interested in upcoming programming techniques like aspect-oriented programming, generative programming and C++ meta coding and has written some nice and handy tools for Windows NT which you can download at his web site.

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