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

, 11 Jun 2001
An article about the techniques to pour reusable design (a design pattern) into reusable code with an example of the observer pattern.
// Observer_DemoDlg.h : header file
//

#if !defined(AFX_OBSERVER_DEMODLG_H__D9BBE0D2_334E_40E6_B55C_F2C21504E906__INCLUDED_)
#define AFX_OBSERVER_DEMODLG_H__D9BBE0D2_334E_40E6_B55C_F2C21504E906__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CMainDlg dialog

class CMainDlg : public CDialog
{
// Construction
public:
	CMainDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	//{{AFX_DATA(CMainDlg)
	enum { IDD = IDD_OBSERVER_DEMO_DIALOG };
	CEdit	m_ctrlOutput;
	double	m_fTemperature;
	double	m_fThreshold;
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CMainDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	//{{AFX_MSG(CMainDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	afx_msg void OnApplyTemp();
	afx_msg void OnApplyTresh();
	afx_msg void OnNewstrategy();
	afx_msg void OnOtherEvent();
	afx_msg void OnPowerEvent();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_OBSERVER_DEMODLG_H__D9BBE0D2_334E_40E6_B55C_F2C21504E906__INCLUDED_)

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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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