crangeedit.cpp

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#include "stdafx.h"
#include "CRangeEdit.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


//	Defines
//
#define BLANK_ENTRY		-1

CRangeEdit::CRangeEdit() :
myMin ( 0 ),		//	Initialize member variables to zero
myMax ( 100 ),
myLastValidValue ( 0 )
{
}

CRangeEdit::~CRangeEdit()
{
}

BEGIN_MESSAGE_MAP(CRangeEdit, CEdit)
	//{{AFX_MSG_MAP(CRangeEdit)
	ON_CONTROL_REFLECT(EN_UPDATE, OnUpdate)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CRangeEdit::OnUpdate() 
{

	CString strWindowText;
	LONG ValidationNumber;
	strWindowText.Empty ( );
	ValidationNumber = 0;
	RemoveLeadingZeros ( );
	GetWindowText ( strWindowText );
	if ( strWindowText.IsEmpty ( ) )
	{
		myLastValidValue = BLANK_ENTRY;
	}
	else
	{
		ValidationNumber = atol ( strWindowText );
		if ( ( ValidationNumber < myMin ) || ( ValidationNumber > myMax ) )
		{
			if ( myLastValidValue >= 0 )
			{
				strWindowText.Format ( "%d", myLastValidValue );
			}
			else
			{
				strWindowText.Empty ( );
			}
			SetWindowText ( strWindowText );
			SetSel ( strWindowText.GetLength ( ), strWindowText.GetLength ( ) );
			MessageBeep ( 0xFFFFFFFF );
		}
		else
		{
			myLastValidValue = ValidationNumber;
		}
	}
}
void CRangeEdit::SetRange ( LONG inLMin, LONG inLMax )
{
	//	Set the member variables
	//
	myMin = inLMin;
	myMax = inLMax;
	myLastValidValue = myMin;
}
void CRangeEdit::RemoveLeadingZeros ( void )
{

	CString strWindowText;
	SHORT index;
	strWindowText.Empty ( );
	index = 0;
	GetWindowText ( strWindowText );
	if ( strWindowText.GetLength ( ) > 1 )
	{
		index = strWindowText.FindOneOf ( "123456789" );
		if ( index > 0 )
		{
			strWindowText = strWindowText.Mid ( index );
		}
		else  if ( index == -1 )
		{
			strWindowText = "0";
		}
		if ( index != 0 )
		{
			SetWindowText ( strWindowText );
			SetSel ( 0, 0 );
		}
	}
}


#undef BLANK_ENTRY