dlgpointstre.cpp

vc++数字图像处理 ,是一本很不错的介绍数字图像方面的书籍,这里有本书的全部源码

// DlgPointStre.cpp : implementation file
//

#include "stdafx.h"
#include "ch1_1.h"
#include "DlgPointStre.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDlgPointStre dialog


CDlgPointStre::CDlgPointStre(CWnd* pParent /*=NULL*/)
	: CDialog(CDlgPointStre::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDlgPointStre)
	m_bX1 = 0;
	m_bY1 = 0;
	m_bX2 = 0;
	m_bY2 = 0;
	//}}AFX_DATA_INIT
}


void CDlgPointStre::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDlgPointStre)
	DDX_Text(pDX, IDC_EDIT_X1, m_bX1);
	DDV_MinMaxByte(pDX, m_bX1, 0, 255);
	DDX_Text(pDX, IDC_EDIT_X2, m_bX2);
	DDV_MinMaxByte(pDX, m_bY1, 0, 255);
	DDX_Text(pDX, IDC_EDIT_Y1, m_bY1);
	DDV_MinMaxByte(pDX, m_bX2, 0, 255);
	DDX_Text(pDX, IDC_EDIT_Y2, m_bY2);
	DDV_MinMaxByte(pDX, m_bY2, 0, 255);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CDlgPointStre, CDialog)
	//{{AFX_MSG_MAP(CDlgPointStre)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_WM_PAINT()
	ON_EN_KILLFOCUS(IDC_EDIT_X1, OnKillfocusEditX1)
	ON_EN_KILLFOCUS(IDC_EDIT_X2, OnKillfocusEditX2)
	ON_EN_KILLFOCUS(IDC_EDIT_Y1, OnKillfocusEditY1)
	ON_EN_KILLFOCUS(IDC_EDIT_Y2, OnKillfocusEditY2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDlgPointStre message handlers

BOOL CDlgPointStre::OnInitDialog() 
{
	
	// 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;
	
	// 初始化拖动状态
	m_iIsDraging = 0;
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void CDlgPointStre::OnKillfocusEditX1() 
{
	// 更新
	UpdateData(TRUE);
	
	// 判断是否下限超过上限
	if (m_bX1 > m_bX2)
	{
		// 互换
		BYTE bTemp = m_bX1;
		m_bX1 = m_bX2;
		m_bX2 = bTemp;
		bTemp = m_bY1;
		m_bY1 = m_bY2;
		m_bY2 = bTemp;
		
		// 更新
		UpdateData(FALSE);
	}
	
	// 重绘
	InvalidateRect(m_MouseRect, TRUE);
}

void CDlgPointStre::OnKillfocusEditX2() 
{
	// 更新
	UpdateData(TRUE);
	
	// 判断是否下限超过上限
	if (m_bX1 > m_bX2)
	{
		// 互换
		BYTE bTemp = m_bX1;
		m_bX1 = m_bX2;
		m_bX2 = bTemp;
		bTemp = m_bY1;
		m_bY1 = m_bY2;
		m_bY2 = bTemp;
		
		// 更新
		UpdateData(FALSE);
	}
	
	// 重绘
	InvalidateRect(m_MouseRect, TRUE);
}

void CDlgPointStre::OnKillfocusEditY1() 
{
	// 更新
	UpdateData(TRUE);
	
	// 重绘
	InvalidateRect(m_MouseRect, TRUE);
}

void CDlgPointStre::OnKillfocusEditY2() 
{
	// 更新
	UpdateData(TRUE);
	
	// 重绘
	InvalidateRect(m_MouseRect, TRUE);
}

void CDlgPointStre::OnOK() 
{
	// 判断是否下限超过上限
	if (m_bX1 > m_bX2)
	{
		// 互换
		BYTE bTemp = m_bX1;
		m_bX1 = m_bX2;
		m_bX2 = bTemp;
		bTemp = m_bY1;
		m_bY1 = m_bY2;
		m_bY2 = bTemp;
		
		// 更新
		UpdateData(FALSE);
	}
	
	// 默认处理事件
	CDialog::OnOK();
}

void CDlgPointStre::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// 当用户单击鼠标左键开始拖动
	if(m_MouseRect.PtInRect(point))
	{
		CRect	rectTemp;
		
		// 计算点1临近区域
		rectTemp.left = m_MouseRect.left + m_bX1 - 2;
		rectTemp.right = m_MouseRect.left + m_bX1 + 2;
		rectTemp.top = 255 + m_MouseRect.top - m_bY1 - 2;
		rectTemp.bottom = 255 + m_MouseRect.top - m_bY1 + 2;
		
		// 判断用户是不是想拖动点1
		if (rectTemp.PtInRect(point))
		{
			
			// 设置拖动状态1，拖动点1
			m_iIsDraging = 1;
			
			// 更改光标
			::SetCursor(::LoadCursor(NULL, IDC_SIZEALL));
		}
		else
		{
			// 计算点2临近区域
			rectTemp.left = m_MouseRect.left + m_bX2 - 2;
			rectTemp.right = m_MouseRect.left + m_bX2 + 2;
			rectTemp.top = 255 + m_MouseRect.top - m_bY2 - 2;
			rectTemp.bottom = 255 + m_MouseRect.top - m_bY2 + 2;
			
			// 判断用户是不是想拖动点2
			if (rectTemp.PtInRect(point))
			{
				
				// 设置拖动状态为2，拖动点2
				m_iIsDraging = 2;
				
				// 更改光标
				::SetCursor(::LoadCursor(NULL, IDC_SIZEALL));
			}
		}
	}
	
	// 默认单击鼠标左键处理事件
	CDialog::OnLButtonDown(nFlags, point);
}

void CDlgPointStre::OnMouseMove(UINT nFlags, CPoint point) 
{
	// 判断当前光标是否在绘制区域
	if(m_MouseRect.PtInRect(point))
	{
		// 判断是否正在拖动
		if (m_iIsDraging != 0)
		{
			// 判断正在拖动点1还是点2
			if (m_iIsDraging == 1)
			{
				// 判断是否下限<上限
				if (point.x - m_MouseRect.left < m_bX2)
				{
					// 更改下限
					m_bX1 = (BYTE) (point.x - m_MouseRect.left);
				}
				else
				{
					// 下限拖过上限，设置为上限-1
					m_bX1 = m_bX2 - 1;
					
					// 重设鼠标位置
					point.x = m_MouseRect.left + m_bX2 - 1;
				}
				
				// 更改Y坐标
				m_bY1 = (BYTE) (255 + m_MouseRect.top - point.y);
			}
			else
			{
				// 正在拖动点2
				
				// 判断是否上限>下限
				if (point.x - m_MouseRect.left > m_bX1)
				{
					// 更改下限
					m_bX2 = (BYTE) (point.x - m_MouseRect.left);
				}
				else
				{
					// 下限拖过上限，设置为下限＋1
					m_bX2 = m_bX1 + 1;
					
					// 重设鼠标位置
					point.x = m_MouseRect.left + m_bX1 + 1;
				}
				
				// 更改Y坐标
				m_bY2 = (BYTE) (255 + m_MouseRect.top - point.y);
			}
			
			// 更改光标
			::SetCursor(::LoadCursor(NULL, IDC_SIZEALL));
			
			// 更新
			UpdateData(FALSE);
			
			// 重绘
			InvalidateRect(m_MouseRect, TRUE);
		}
		else
		{
			CRect	rectTemp1;
			CRect	rectTemp2;
			
			// 计算点1临近区域
			rectTemp1.left = m_MouseRect.left + m_bX1 - 2;
			rectTemp1.right = m_MouseRect.left + m_bX1 + 2;
			rectTemp1.top = 255 + m_MouseRect.top - m_bY1 - 2;
			rectTemp1.bottom = 255 + m_MouseRect.top - m_bY1 + 2;
			
			// 计算点2临近区域
			rectTemp2.left = m_MouseRect.left + m_bX2 - 2;
			rectTemp2.right = m_MouseRect.left + m_bX2 + 2;
			rectTemp2.top = 255 + m_MouseRect.top - m_bY2 - 2;
			rectTemp2.bottom = 255 + m_MouseRect.top - m_bY2 + 2;
			
			// 判断用户在点1或点2旁边
			if ((rectTemp1.PtInRect(point)) || (rectTemp2.PtInRect(point)))
			{
				// 更改光标
				::SetCursor(::LoadCursor(NULL, IDC_SIZEALL));
			}
		}
	}
	
	// 默认鼠标移动处理事件
	CDialog::OnMouseMove(nFlags, point);
}

void CDlgPointStre::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 CDlgPointStre::OnPaint() 
{
	// 字符串
	CString str;
	
	// 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, 2, 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));
	
	// 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);
	
	// 写坐标
	str.Format("0");
	pDC->TextOut(10, 281, str);
	
	str.Format("255");
	pDC->TextOut(265, 281, str);
	pDC->TextOut(11, 25, str);
	
	// 绘制X轴箭头
	pDC->LineTo(315,275);
	pDC->MoveTo(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);
	
	// 更改成蓝色画笔
	pDC->SelectObject(pPenBlue);	
	
	// 绘制坐标值
	str.Format("(%d, %d)", m_bX1, m_bY1);
	pDC->TextOut(m_bX1 + 10, 281 - m_bY1, str);
	str.Format("(%d, %d)", m_bX2, m_bY2);
	pDC->TextOut(m_bX2 + 10, 281 - m_bY2, str);
	
	// 绘制用户指定的变换直线
	pDC->MoveTo(10, 280);
	pDC->LineTo(m_bX1 + 10, 280 - m_bY1);
	pDC->LineTo(m_bX2 + 10, 280 - m_bY2);
	pDC->LineTo(265, 25);
	
	// 绘制点边缘的小矩形
	CBrush  brush;
	brush.CreateSolidBrush(RGB(0,255,0));
	
	// 选中刷子
	CGdiObject* pOldBrush = pDC->SelectObject(&brush);
	
	// 绘制小矩形
	pDC->Rectangle(m_bX1 + 10 - 2, 280 - m_bY1 - 2, m_bX1 + 12, 280 - m_bY1 + 2);
	pDC->Rectangle(m_bX2 + 10 - 2, 280 - m_bY2 - 2, m_bX2 + 12, 280 - m_bY2 + 2);
	
	// 恢复以前的画笔
	pDC->SelectObject(pOldPen);	
	
	// 绘制边缘
	pDC->MoveTo(10,25);
	pDC->LineTo(265,25);
	pDC->LineTo(265,280);
	
	// 删除新的画笔
	delete pPenRed;
	delete pPenBlue;
	
}