Smart Grid

#ifndef __Common_h__
#define __Common_h__

#include "StdAfx.h"
#include <time.h>


/*
Data types
*/

typedef basic_string< TCHAR > String;

/*
	Global functions
*/

BOOL OleDate2Tm(DATE dtSrc, struct tm& tmDest);
BOOL Tm2OleDate(struct tm& tmSrc, DATE& dtDest);

/*
Used for automatic saving and restoring DC contexts
*/
class CSaveDC
{
public:

	CSaveDC( HDC dc )
	{
		m_bRestored = false;
		m_hDC = dc;
		m_nID = ::SaveDC( dc );
	}

	void RestoreDC()
	{
		::RestoreDC( m_hDC, m_nID );
		m_bRestored = true;
	}

	~CSaveDC()
	{
		if( !m_bRestored )
		{
			RestoreDC();
		}
	}

private:
	HDC m_hDC;
	int m_nID;
	bool m_bRestored;
};



/*
Used for automatic management of GDI objects
*/
template < class GDIObjectType >
class CGDIObject
{
public:
	
	CGDIObject( GDIObjectType hGDIObject = NULL )
	{
		_ASSERTE( hGDIObject );
		m_hGDIObject = hGDIObject;
	}

	CGDIObject( const CGDIObject< GDIObjectType >& gdiObject )
	{
		/*
			Do not copy this object
		*/
		_ASSERTE( FALSE );
	}

	~CGDIObject()
	{
		_ASSERTE( m_hGDIObject );
		::DeleteObject( m_hGDIObject );
	}

	CGDIObject< GDIObjectType >& operator=( const CGDIObject< GDIObjectType >& gdiObject )
	{
		/*
		Do not assign this object
		*/
		_ASSERTE( FALSE );
		return *this;
	}

	operator GDIObjectType()
	{
		return static_cast< GDIObjectType >( m_hGDIObject );
	}

private:
	GDIObjectType m_hGDIObject;
};

#endif // __Common_h__