www.pudn.com > LlxDip.rar > DlgIntensity.cpp

// DlgIntensity.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "LlxDip.h" 
#include "DlgIntensity.h" 
#include "DIBAPI.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CDlgIntensity dialog 
 
 
CDlgIntensity::CDlgIntensity(CWnd* pParent /*=NULL*/) 
	: CDialog(CDlgIntensity::IDD, pParent) 
{ 
	//{{AFX_DATA_INIT(CDlgIntensity) 
	m_iLowGray = 0; 
	m_iUpGray = 0; 
	//}}AFX_DATA_INIT 
} 
 
 
void CDlgIntensity::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CDlgIntensity) 
	DDX_Text(pDX, IDC_EDIT_LowGray, m_iLowGray); 
	DDV_MinMaxInt(pDX, m_iLowGray, 0, 255); 
	DDX_Text(pDX, IDC_EDIT_UpGray, m_iUpGray); 
	DDV_MinMaxInt(pDX, m_iUpGray, 0, 255); 
	//}}AFX_DATA_MAP 
} 
 
 
BEGIN_MESSAGE_MAP(CDlgIntensity, CDialog) 
	//{{AFX_MSG_MAP(CDlgIntensity) 
	ON_WM_PAINT() 
	ON_EN_KILLFOCUS(IDC_EDIT_LowGray, OnKillfocusEDITLowGray) 
	ON_EN_KILLFOCUS(IDC_EDIT_UpGray, OnKillfocusEDITUpGray) 
	ON_WM_MOUSEMOVE() 
	ON_WM_LBUTTONDOWN() 
	ON_WM_LBUTTONUP() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CDlgIntensity message handlers 
 
BOOL CDlgIntensity::OnInitDialog()  
{ 
	// 指向源图像象素的指针 
	unsigned char * lpSrc; 
	 
	// 循环变量 
	LONG i; 
	LONG j; 
	 
	// 调用默认OnInitDialog函数 
	CDialog::OnInitDialog(); 
	 
	// 获取绘制直方图的标签 
	CWnd* pWnd = GetDlgItem(IDC_COORD); 
	 
	// 计算接受鼠标事件的有效区域 
	pWnd->GetClientRect(m_MouseRect); 
	pWnd->ClientToScreen(&m_MouseRect); 
	 
	CRect rect; 
	GetClientRect(rect); 
	ClientToScreen(&rect); 
	 
	m_MouseRect.top -= rect.top; 
	m_MouseRect.left -= rect.left; 
	 
	// 设置接受鼠标事件的有效区域 
	m_MouseRect.top += 25; 
	m_MouseRect.left += 10; 
	m_MouseRect.bottom = m_MouseRect.top + 255; 
	m_MouseRect.right = m_MouseRect.left + 256; 
	 
	// 重置计数为0 
	for (i = 0; i < 256; i ++) 
	{ 
		// 清零 
		m_lCount[i] = 0; 
	} 
	 
	// 图像每行的字节数 
	LONG lLineBytes; 
	 
	// 计算图像每行的字节数 
	lLineBytes = WIDTHBYTES(m_lWidth * 8); 
	 
	// 计算各个灰度值的计数 
	for (i = 0; i < m_lHeight; i ++) 
	{ 
		for (j = 0; j < m_lWidth; j ++) 
		{ 
			lpSrc = (unsigned char *)m_lpDIBBits + lLineBytes * i + j; 
			 
			// 计数加1 
			m_lCount[*(lpSrc)]++; 
		} 
	} 
	 
	// 初始化拖动状态 
	m_iIsDraging = 0; 
	 
	// 返回TRUE 
	return TRUE; 
} 
 
void CDlgIntensity::OnKillfocusEDITLowGray()  
{ 
	// 保存变动（控件中数值保存到成员变量中） 
	UpdateData(TRUE); 
	 
	// 判断是否下限超过上限 
	if (m_iLowGray > m_iUpGray) 
	{ 
		// 互换 
		int iTemp = m_iLowGray; 
		m_iLowGray = m_iUpGray; 
		m_iUpGray = iTemp; 
		 
		// 更新（成员变量中数值保存到控件中） 
		UpdateData(FALSE); 
	} 
	 
	// 重绘直方图 
	InvalidateRect(m_MouseRect, TRUE); 
} 
 
void CDlgIntensity::OnKillfocusEDITUpGray()  
{ 
	// 保存变动 
	UpdateData(TRUE); 
	 
	// 判断是否下限超过上限 
	if (m_iLowGray > m_iUpGray) 
	{ 
		// 互换 
		int iTemp = m_iLowGray; 
		m_iLowGray = m_iUpGray; 
		m_iUpGray = iTemp; 
		 
		// 更新 
		UpdateData(FALSE); 
	} 
	 
	// 重绘直方图 
	InvalidateRect(m_MouseRect, TRUE); 
	 
} 
 
void CDlgIntensity::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	// 当用户单击鼠标左键开始拖动 
	 
	// 判断是否在接受鼠标事件的有效区域中 
	if(m_MouseRect.PtInRect(point)) 
	{ 
		if (point.x == (m_MouseRect.left + m_iLowGray)) 
		{ 
			 
			// 设置拖动状态1，拖动下限 
			m_iIsDraging = 1; 
			 
			// 更改光标 
			::SetCursor(::LoadCursor(NULL, IDC_SIZEWE)); 
		} 
		else if (point.x == (m_MouseRect.left + m_iUpGray)) 
		{ 
			 
			// 设置拖动状态为2，拖动上限 
			m_iIsDraging = 2; 
			 
			// 更改光标 
			::SetCursor(::LoadCursor(NULL, IDC_SIZEWE)); 
		} 
	} 
	 
	// 默认单击鼠标左键处理事件 
	CDialog::OnLButtonDown(nFlags, point); 
} 
 
void CDlgIntensity::OnMouseMove(UINT nFlags, CPoint point)  
{ 
	 
	// 判断是否在接受鼠标事件的有效区域中 
	if(m_MouseRect.PtInRect(point)) 
	{ 
		// 判断是否正在拖动 
		if (m_iIsDraging != 0) 
		{ 
			// 判断正在拖动上限还是下限 
			if (m_iIsDraging == 1) 
			{ 
				// 判断是否下限<上限 
				if (point.x - m_MouseRect.left < m_iUpGray) 
				{ 
					// 更改下限 
					m_iLowGray = point.x - m_MouseRect.left; 
				} 
				else 
				{ 
					// 下限拖过上限，设置为上限-1 
					m_iLowGray = m_iUpGray - 1; 
					 
					// 重设鼠标位置 
					point.x = m_MouseRect.left + m_iUpGray - 1; 
				} 
			} 
			else 
			{ 
				// 正在拖动上限 
				 
				// 判断是否上限>下限 
				if (point.x - m_MouseRect.left > m_iLowGray) 
				{ 
					// 更改下限 
					m_iUpGray = point.x - m_MouseRect.left; 
				} 
				else 
				{ 
					// 下限拖过上限，设置为下限＋1 
					m_iUpGray = m_iLowGray + 1; 
					 
					// 重设鼠标位置 
					point.x = m_MouseRect.left + m_iLowGray + 1; 
				} 
			} 
			 
			// 更改光标 
			::SetCursor(::LoadCursor(NULL, IDC_SIZEWE)); 
			 
			// 更新 
			UpdateData(FALSE); 
			 
			// 重绘直方图 
			InvalidateRect(m_MouseRect, TRUE); 
		} 
		else if (point.x == (m_MouseRect.left + m_iLowGray) || point.x == (m_MouseRect.left + m_iUpGray)) 
		{ 
			// 更改光标 
			::SetCursor(::LoadCursor(NULL, IDC_SIZEWE)); 
		} 
	} 
	 
	// 默认鼠标移动处理事件 
	CDialog::OnMouseMove(nFlags, point); 
} 
 
void CDlgIntensity::OnLButtonUp(UINT nFlags, CPoint point)  
{ 
	// 当用户释放鼠标左键停止拖动 
	if (m_iIsDraging != 0) 
	{ 
		// 重置拖动状态 
		m_iIsDraging = 0; 
	} 
	 
	// 默认释放鼠标左键处理事件 
	CDialog::OnLButtonUp(nFlags, point); 
} 
 
void CDlgIntensity::OnPaint()  
{ 
	// 字符串 
	CString str; 
	 
	// 循环变量 
	LONG i; 
	 
	// 最大计数 
	LONG lMaxCount = 0; 
	 
	// 设备上下文 
	CPaintDC dc(this); 
	 
	// 获取绘制坐标的文本框 
	CWnd* pWnd = GetDlgItem(IDC_COORD); 
	 
	// 指针 
	CDC* pDC = pWnd->GetDC(); 
	pWnd->Invalidate(); 
	pWnd->UpdateWindow(); 
	 
	pDC->Rectangle(0,0,330,300); 
	 
	// 创建画笔对象 
	CPen* pPenRed = new CPen; 
	 
	// 红色画笔 
	pPenRed->CreatePen(PS_SOLID,1,RGB(255,0,0)); 
	 
	// 创建画笔对象 
	CPen* pPenBlue = new CPen; 
	 
	// 蓝色画笔 
	pPenBlue->CreatePen(PS_SOLID,1,RGB(0,0, 255)); 
	 
	// 创建画笔对象 
	CPen* pPenGreen = new CPen; 
	 
	// 绿色画笔 
	pPenGreen->CreatePen(PS_DOT,1,RGB(0,255,0)); 
	 
	// 选中当前红色画笔，并保存以前的画笔 
	CGdiObject* pOldPen = pDC->SelectObject(pPenRed); 
	 
	// 绘制坐标轴 
	pDC->MoveTo(10,10); 
	 
	// 垂直轴 
	pDC->LineTo(10,280); 
	 
	// 水平轴 
	pDC->LineTo(320,280); 
	 
	// 写X轴刻度值 
	str.Format("0"); 
	pDC->TextOut(10, 283, str); 
	str.Format("50"); 
	pDC->TextOut(60, 283, str); 
	str.Format("100"); 
	pDC->TextOut(110, 283, str); 
	str.Format("150"); 
	pDC->TextOut(160, 283, str); 
	str.Format("200"); 
	pDC->TextOut(210, 283, str); 
	str.Format("255"); 
	pDC->TextOut(265, 283, str); 
	 
	// 绘制X轴刻度 
	for (i = 0; i < 256; i += 5) 
	{ 
		if ((i & 1) == 0) 
		{ 
			// 10的倍数 
			pDC->MoveTo(i + 10, 280); 
			pDC->LineTo(i + 10, 284); 
		} 
		else 
		{ 
			// 10的倍数 
			pDC->MoveTo(i + 10, 280); 
			pDC->LineTo(i + 10, 282); 
		} 
	} 
	 
	// 绘制X轴箭头 
	pDC->MoveTo(315,275); 
	pDC->LineTo(320,280); 
	pDC->LineTo(315,285); 
	 
	// 绘制X轴箭头 
	pDC->MoveTo(10,10); 
	pDC->LineTo(5,15); 
	pDC->MoveTo(10,10); 
	pDC->LineTo(15,15); 
	 
	// 计算最大计数值 
	for (i = m_iLowGray; i <= m_iUpGray; i ++) 
	{ 
		// 判断是否大于当前最大值 
		if (m_lCount[i] > lMaxCount) 
		{ 
			// 更新最大值 
			lMaxCount = m_lCount[i]; 
		} 
	} 
	 
	// 输出最大计数值 
	pDC->MoveTo(10, 25); 
	pDC->LineTo(14, 25); 
	str.Format("%d", lMaxCount); 
	pDC->TextOut(11, 26, str); 
	 
	// 更改成绿色画笔 
	pDC->SelectObject(pPenGreen);	 
	 
	// 绘制窗口上下限 
	pDC->MoveTo(m_iLowGray + 10, 25); 
	pDC->LineTo(m_iLowGray + 10, 280); 
	 
	pDC->MoveTo(m_iUpGray + 10, 25); 
	pDC->LineTo(m_iUpGray + 10, 280); 
	 
	// 更改成蓝色画笔 
	pDC->SelectObject(pPenBlue);	 
	 
	// 判断是否有计数 
	if (lMaxCount > 0) 
	{ 
		// 绘制直方图 
		for (i = m_iLowGray; i <= m_iUpGray; i ++) 
		{ 
			pDC->MoveTo(i + 10, 280); 
			pDC->LineTo(i + 10, 281 - (int) (m_lCount[i] * 256 / lMaxCount)); 
		} 
	} 
	 
	// 恢复以前的画笔 
	pDC->SelectObject(pOldPen);	 
	 
	// 删除新的画笔 
	delete pPenRed; 
	delete pPenBlue; 
	delete pPenGreen; 
	 
} 
 
void CDlgIntensity::OnOK()  
{ 
	 
	// 判断是否下限超过上限 
	if (m_iLowGray > m_iUpGray) 
	{ 
		// 互换 
		int iTemp = m_iLowGray; 
		m_iLowGray = m_iUpGray; 
		m_iUpGray = iTemp; 
	} 
	 
	// 返回 
	CDialog::OnOK(); 
}