// GreyDlg.cpp : implementation file
//

#include "stdafx.h"
#include "dip.h"
#include "GreyDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CGreyDlg dialog


CGreyDlg::CGreyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CGreyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CGreyDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	int i;
	for(i=0;i<256;i++)
		grey[i]=0;
}


void CGreyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CGreyDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CGreyDlg, CDialog)
	//{{AFX_MSG_MAP(CGreyDlg)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGreyDlg message handlers

int CGreyDlg::DoModal() 
{
	// TODO: Add your specialized code here and/or call the base class
	
	return CDialog::DoModal();
}


void CGreyDlg::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	//顯示背景框
	dc.Rectangle(10,10,300,400);
	int i;
	LONG greymax=0;
	for(i=0;i<256;i++)
	{
		if (grey[i]>greymax) greymax=grey[i];
	}
	
	//顯示灰度直方圖
	
	dc.MoveTo(283,395-int(grey[0]*1.0/greymax*380));	
	for(i=1;i<256;i++)
	{
		dc.LineTo(283-i,395-int(grey[i]*1.0/greymax*380));
		dc.MoveTo(283-i,395-int(grey[i]*1.0/greymax*380));
	}

	// Do not call CDialog::OnPaint() for painting messages
}