[开发工具]VS2019 RectTracker橡皮筋库改造应用（二）

????????最近玩RectTracker有点意思，进一步优化了简单的属性选择以及颜色选择功能，这样测试程序会更加直观。?

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????????8个Handle手柄的颜色可以调节，大小可以调节，方向键移动步距可以调剂，画框的颜色可以选择，8个Handle手柄的Inside属性和Outside属性可以设置，此程序只为演示RectTracker类的应用，没有实际意义。 年底了比较闲散，抽时间写些VS2019 MFC类库的应用例程，和各位初学者们一起学习！

工程文件 CPP源代码：

#include "pch.h"
#include "framework.h"
#include "MFCApplicationCRectTracker.h"
#include "MFCApplicationCRectTrackerDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif
COLORREF SolidRgb = RGB(0, 255, 0);
COLORREF DashaRgb = RGB(0, 0, 255);
COLORREF m_ColorHandle = RGB(0, 0, 255);
COLORREF m_RectangeRgb= RGB(255, 0, 0);
CPen	 m_SPen(PS_SOLID, 1, SolidRgb);
CPen	 m_DPen(PS_DASHDOT, 1, DashaRgb);
CRect    m_GetPictureRect;
CBrush   m_newBrush;
CBrush*  m_oldBrush;

class CAboutDlg : public CDialogEx
{
public:
	CAboutDlg();

#ifdef AFX_DESIGN_TIME
	enum { IDD = IDD_ABOUTBOX };
#endif

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);   

protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX)
{
	EnableActiveAccessibility();
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


CMFCApplicationCRectTrackerDlg::CMFCApplicationCRectTrackerDlg(CWnd* pParent /*=nullptr*/)
	: CDialogEx(IDD_MFCAPPLICATIONCRECTTRACKER_DIALOG, pParent)
{
	EnableActiveAccessibility();
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_IsChose = FALSE;
	m_IsDraw = FALSE;
	m_rectNum = 0;
	m_rectChoseNum = 0;
	m_FlaMoveStep = 1;
	m_dirct = 0;
}

void CMFCApplicationCRectTrackerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_COMBOSTYLE, m_Style);

	DDX_Control(pDX, IDC_COMBOFLAMOVESTEP, m_MoveStep);
	DDX_Control(pDX, IDC_CHECKRESIZEINSIDE, m_ResizeInside);
	DDX_Control(pDX, IDC_CHECKRESIZEOUTSIDE, m_ResizeOutside);
	DDX_Control(pDX, IDC_SLIDERHANDLESIZE, m_HandleSize);
	DDX_Control(pDX, IDC_STATICSOLIDRGB, m_SolidRGB);
	DDX_Control(pDX, IDC_STATICDASHAPENRGB, m_DashRGB);
	DDX_Control(pDX, IDC_STATICHANDLERGB, m_handleRGB);
	DDX_Control(pDX, IDC_STATICRECTANGE, m_RectRGB);
}

BEGIN_MESSAGE_MAP(CMFCApplicationCRectTrackerDlg, CDialogEx)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_LBUTTONDOWN()
	ON_WM_SETCURSOR()
	ON_WM_KEYDOWN()
	ON_BN_CLICKED(IDC_BUTTONDRAW, &CMFCApplicationCRectTrackerDlg::OnBnClickedButtondraw)
	ON_BN_CLICKED(IDC_BUTTONSAVEPICTURE, &CMFCApplicationCRectTrackerDlg::OnBnClickedButtonsavepicture)
	ON_BN_CLICKED(IDC_CHECKRESIZEINSIDE, &CMFCApplicationCRectTrackerDlg::OnBnClickedCheckresizeinside)
	ON_BN_CLICKED(IDC_CHECKRESIZEOUTSIDE, &CMFCApplicationCRectTrackerDlg::OnBnClickedCheckresizeoutside)
	ON_WM_LBUTTONUP()
	ON_WM_SIZE()
	ON_NOTIFY(NM_CUSTOMDRAW, IDC_SLIDERHANDLESIZE, &CMFCApplicationCRectTrackerDlg::OnNMCustomdrawSliderhandlesize)
END_MESSAGE_MAP()


BOOL CMFCApplicationCRectTrackerDlg::OnInitDialog()
{
	CDialogEx::OnInitDialog();
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != nullptr)
	{
		BOOL bNameValid;
		CString strAboutMenu;
		bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
		ASSERT(bNameValid);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标
	ShowWindow(SW_MAXIMIZE);
	m_Style.SetCurSel(1);
	m_MoveStep.SetCurSel(0);
	m_HandleSize.SetRange(0, 50);
	m_HandleSize.SetRangeMax(50);
	m_HandleSize.SetRangeMin(0);
	m_HandleSize.SetPos(10);
	m_HandleSize.SetLineSize(1);
	int m_GetSliderValue = m_HandleSize.GetPos();
	SetDlgItemInt(IDC_STATICSLIDERVALUE,m_GetSliderValue);
	m_HandleSize.SetDlgItemInt(IDC_SLIDERHANDLESIZE,10);
	m_ResizeInside.SetCheck(BST_CHECKED);

	m_rctCurTracker.m_rect.SetRect(0,0,0,0);
	m_rctCurTracker.m_nStyle = CMyCrectTracker::dottedLine | CMyCrectTracker::resizeInside;
	m_rctCurTracker.m_nHandleSize = 10;
	for (int i = 0; i < MAX_RECT_NUM; i++)
	{
		m_rctTracker[i].m_rect.SetRect(0,0,0,0);
		m_rctTracker[i].m_nStyle= CMyCrectTracker::dottedLine | CMyCrectTracker::resizeInside;
		m_rctTracker[i].m_nHandleSize = 10;
	}
	
	return TRUE;  
}

void CMFCApplicationCRectTrackerDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialogEx::OnSysCommand(nID, lParam);
	}
}

void CMFCApplicationCRectTrackerDlg::OnPaint()
{
	CPaintDC pDC(this);
	m_newBrush.CreateSolidBrush(SolidRgb);
	m_SolidRGB.GetWindowRect(&m_GetPictureRect);
	ScreenToClient(&m_GetPictureRect);
	m_oldBrush = pDC.SelectObject(&m_newBrush);
	pDC.Rectangle(m_GetPictureRect);
	pDC.SelectObject(m_oldBrush);
	m_newBrush.DeleteObject();

	m_newBrush.CreateSolidBrush(DashaRgb);
	m_DashRGB.GetWindowRect(m_GetPictureRect);
	ScreenToClient(&m_GetPictureRect);
	m_oldBrush = pDC.SelectObject(&m_newBrush);
	pDC.Rectangle(m_GetPictureRect);
	pDC.SelectObject(m_oldBrush);
	m_newBrush.DeleteObject();

	m_newBrush.CreateSolidBrush(m_ColorHandle);
	m_handleRGB.GetWindowRect(m_GetPictureRect);
	ScreenToClient(&m_GetPictureRect);
	m_oldBrush = pDC.SelectObject(&m_newBrush);
	pDC.Rectangle(m_GetPictureRect);
	pDC.SelectObject(m_oldBrush);
	m_newBrush.DeleteObject();

	m_newBrush.CreateSolidBrush(m_RectangeRgb);
	m_RectRGB.GetWindowRect(m_GetPictureRect);
	ScreenToClient(&m_GetPictureRect);
	m_oldBrush = pDC.SelectObject(&m_newBrush);
	pDC.Rectangle(m_GetPictureRect);
	pDC.SelectObject(m_oldBrush);
	m_newBrush.DeleteObject();
	if (IsIconic())
	{
		CPaintDC dc(this); 

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialogEx::OnPaint();
	 {
			if (m_IsChose)
			
				m_rctCurTracker.Draw(&pDC,&m_SPen,&m_DPen,m_ColorHandle);
				CPen m_Pen(PS_SOLID, 1, m_RectangeRgb);
				CPen* m_OldPen;
				m_OldPen = NULL;
				m_OldPen = pDC.SelectObject(&m_Pen);
				CBrush* m_CBrush = CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
				pDC.SelectObject(m_CBrush);
				CRect rct;
				m_rctCurTracker.GetTrueRect(&rct);
				pDC.Rectangle(&rct);
				CSize rct_size;
				for (int i = 0; i < MAX_RECT_NUM; i++)
				{
					m_rctTracker[i].GetTrueRect(&rct);
					rct_size = m_rctTracker[i].m_rect.Size();
					if (rct_size.cx * rct_size.cy == 0 || i == m_rectChoseNum)
					{
						continue;
					}
					pDC.Rectangle(&rct);
				}
				m_Pen.DeleteObject();
	 }
		
	}
}

HCURSOR CMFCApplicationCRectTrackerDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

BOOL CMFCApplicationCRectTrackerDlg::PreTranslateMessage(MSG* pMsg)
{
	if (pMsg->message==WM_KEYDOWN)
	{
		switch (pMsg->wParam)
		{
		case VK_LEFT:
				m_dirct = 1;
				break;
		case VK_RIGHT:
				m_dirct = 2;
				break;
		case VK_UP:
				m_dirct = 3;
				break;
		case VK_DOWN:
				m_dirct = 4;
				break;
		case VK_DELETE:
				m_dirct = 5;
				break;
		default:
				m_dirct = 0;
			break;
		}
		ChangeRectPt(m_dirct);
	}
	return CDialogEx::PreTranslateMessage(pMsg);
}


void CMFCApplicationCRectTrackerDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	BOOL IsInRct = FALSE;
	int i = 0;
	do
	{
		if (m_rctTracker[i].HitTest(point)<0)
		{
			IsInRct = FALSE;
		}
		else
		{
			IsInRct = TRUE;
			m_rectChoseNum = i;
			m_rctCurTracker = m_rctTracker[m_rectChoseNum];
			m_IsChose = TRUE;
			break;
		}
		i++;

	} while (i<m_rectNum);
	if (!IsInRct)
	{
		CMyCrectTracker temRectTracker;
		CRect p_rect;
		temRectTracker.TrackRubberBand(this,point);
		temRectTracker.m_rect.NormalizeRect();
		if (p_rect.IntersectRect(temRectTracker.m_rect,m_rctCurTracker.m_rect))
			m_IsChose = TRUE;
		else
		{
			m_IsChose = FALSE;
			if (m_IsDraw)
			{
				m_rctTracker[m_rectNum].m_rect = temRectTracker.m_rect;
				m_rctCurTracker.m_rect = temRectTracker.m_rect;
				CClientDC dc(this);
				m_rctCurTracker.Draw(&dc, &m_SPen, &m_DPen, m_ColorHandle);
				m_rectChoseNum = m_rectNum;
				m_rectNum++;
				if (m_rectNum>MAX_RECT_NUM)
				{
					m_rectNum = MAX_RECT_NUM;
					MessageBox(_T("已画区域超出上限，不能继续绘画！"),_T("警告！"),MB_OK|MB_ICONWARNING);
				}
				m_IsChose = TRUE;
				m_IsDraw = FALSE;
				Invalidate();
			}
		}
		Invalidate();
	}
	else
	{
		CClientDC pc(this);
		int m_StyleIndex = 0;
		int m_GetMoveStep = 0;
		int m_GetHandleSize = 0;
		m_StyleIndex = m_Style.GetCurSel();
		m_GetMoveStep = m_MoveStep.GetCurSel() + 1;
		m_FlaMoveStep = m_GetMoveStep;
		m_GetHandleSize = m_HandleSize.GetPos();
		switch (m_StyleIndex)
		{
		case 0:
			StyleSelected = CMyCrectTracker::solidLine;
			break;
		case 1:
			StyleSelected = CMyCrectTracker::dottedLine;
			break;
		default:
			break;
		}
		if (m_ResizeInside.GetCheck() == BST_CHECKED)
		{
			HandleDirSelected = CMyCrectTracker::resizeInside;
		}
		if (m_ResizeOutside.GetCheck() == BST_CHECKED)
		{
			HandleDirSelected = CMyCrectTracker::resizeOutside;
		}
		m_rctCurTracker.m_nStyle = StyleSelected | HandleDirSelected;
		m_rctCurTracker.m_nHandleSize = m_GetHandleSize;
		m_rctCurTracker.Track(this,point);
		m_rctCurTracker.m_rect.NormalizeRect();
		m_rctTracker[m_rectChoseNum] = m_rctCurTracker;
		m_IsChose = TRUE;
		Invalidate();
	}
	
	CDialogEx::OnLButtonDown(nFlags, point);
}


BOOL CMFCApplicationCRectTrackerDlg::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
	if (pWnd==this&&m_rctCurTracker.SetCursor(this,nHitTest))
	{
		return TRUE;
	}
	return CDialogEx::OnSetCursor(pWnd, nHitTest, message);
}


void CMFCApplicationCRectTrackerDlg::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
	
	CDialogEx::OnKeyDown(nChar, nRepCnt, nFlags);
}


void CMFCApplicationCRectTrackerDlg::OnBnClickedButtondraw()
{
	int m_StyleIndex=0;
	int m_GetMoveStep=0;
	int m_GetHandleSize=0;
	m_StyleIndex =m_Style.GetCurSel();
	m_GetMoveStep = m_MoveStep.GetCurSel()+1;
	m_FlaMoveStep = m_GetMoveStep;
	m_GetHandleSize = m_HandleSize.GetPos();
	switch (m_StyleIndex)
	{
	case 0:
		StyleSelected = CMyCrectTracker::solidLine;
		break;
	case 1:
		StyleSelected = CMyCrectTracker::dottedLine;
		break;
	default:
		break;
	}
	if (m_ResizeInside.GetCheck()==BST_CHECKED)
	{
		HandleDirSelected = CMyCrectTracker::resizeInside;
	}
	if (m_ResizeOutside.GetCheck() == BST_CHECKED)
	{
		HandleDirSelected = CMyCrectTracker::resizeOutside;
	}
	m_rctCurTracker.m_rect.SetRect(0, 0, 0, 0);
	m_rctCurTracker.m_nStyle = StyleSelected | HandleDirSelected;
	m_rctCurTracker.m_nHandleSize = m_GetHandleSize;
	m_IsDraw = TRUE;
}

void CMFCApplicationCRectTrackerDlg::ChangeRectPt(int ChangeDir)
{
	CRect rct;
	CRect rect2;
	CClientDC PDC(this);
	int  CPenOld=0 ;
	rct = m_rctCurTracker.m_rect;
	switch (ChangeDir)
	{
	case 1:
		rct.TopLeft().x-= m_FlaMoveStep;
		rct.BottomRight().x-= m_FlaMoveStep;
		break;
	case 2:
		rct.TopLeft().x += m_FlaMoveStep;
		rct.BottomRight().x+= m_FlaMoveStep;
		break;
	case 3:
		rct.TopLeft().y-= m_FlaMoveStep;
		rct.BottomRight().y-= m_FlaMoveStep;
		break;
	case 4:
		rct.TopLeft().y+= m_FlaMoveStep;
		rct.BottomRight().y+= m_FlaMoveStep;
		break;
	case 5:	
		m_rctCurTracker.m_rect.SetRect(-10, -10, -10, -10);
		m_rctTracker[m_rectChoseNum] = m_rctCurTracker;
		m_rctCurTracker.GetTrueRect(&rect2);	
		RedrawWindow();
		Invalidate();
		return;
	}
	m_rctCurTracker.m_rect.SetRect(rct.TopLeft(),rct.BottomRight());
	m_rctTracker[m_rectChoseNum] = m_rctCurTracker;
	if (ChangeDir!=0)
	{
		Invalidate();
	}
	m_dirct = 0;
}


void CMFCApplicationCRectTrackerDlg::OnBnClickedButtonsavepicture()
{
	CBitmap m_PictureSaveToPC;
	CDC     m_DcSave;
	CClientDC m_SaveDc(this);
	CString CFilePathName;
	TCHAR szFilter[] = _T("*.JPG图片文件(.JPG)|*.txt|配置文件(.ini)|*.ini|word文件(.doc)|*.doc|所有文件(*.*)|*.*||");
	CFileDialog dlg(FALSE,_T(".JPG"), _T("m_PictureSaveToPC.JPG"), OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, szFilter, this, 0, TRUE);
	if (dlg.DoModal() == IDCANCEL)
	{
		MessageBox(_T("保存文件已取消！"), _T("信息提示!"), MB_OK | MB_OKCANCEL | MB_ICONINFORMATION);
		return;
	}
	CFilePathName = dlg.m_ofn.lpstrFile;
	CFilePathName.TrimRight(_T(".txt"));
	CFilePathName = CFilePathName + dlg.m_ofn.lpstrDefExt;
	if (m_IsChose==TRUE)
	{
		m_PictureSaveToPC.CreateCompatibleBitmap(&m_SaveDc, m_rctCurTracker.m_rect.Width(), m_rctCurTracker.m_rect.Height());
		m_DcSave.CreateCompatibleDC(&m_SaveDc);
		m_DcSave.SelectObject(m_PictureSaveToPC);
		m_DcSave.BitBlt(0,0, m_rctCurTracker.m_rect.Width(), m_rctCurTracker.m_rect.Height(),&m_SaveDc, m_rctCurTracker.m_rect.left, m_rctCurTracker.m_rect.top,SRCCOPY);
		CImage m_Image;
		m_Image.Attach((HBITMAP)m_PictureSaveToPC);
		m_Image.Save(CFilePathName);
		m_Image.Detach();
		MessageBox(_T("选择区域已保存到：")+ CFilePathName+_T("目录下！"), _T("信息提示："), MB_OK | MB_ICONINFORMATION);
		m_PictureSaveToPC.DeleteObject();
		m_DcSave.DeleteDC();
	}
	else
	{
		MessageBox(_T("当前要保存的区域没有选中,请先选中后重试！"),_T("信息提示："),MB_OK|MB_ICONERROR);
	}

}


void CMFCApplicationCRectTrackerDlg::OnBnClickedCheckresizeinside()
{
	CheckDlgButton(IDC_CHECKRESIZEOUTSIDE,0);
}


void CMFCApplicationCRectTrackerDlg::OnBnClickedCheckresizeoutside()
{
	CheckDlgButton(IDC_CHECKRESIZEINSIDE,0);
}

void CMFCApplicationCRectTrackerDlg::OnLButtonUp(UINT nFlags, CPoint point)
{

	CRect m_ClickedRct;
	CPoint ptCurPos;
	GetCursorPos(&ptCurPos);
	GetDlgItem(IDC_STATICSOLIDRGB)->GetWindowRect(&m_ClickedRct);
	if (m_ClickedRct.PtInRect(ptCurPos))
	{
		CColorDialog DlgSolidRGB(SolidRgb);
		CRect m_GetPictureRect;
		CBrush m_newBrush;
		CBrush* m_oldBrush;
		CClientDC clientDC(this);
		if (IDOK == DlgSolidRGB.DoModal())
		{
			SolidRgb = DlgSolidRGB.GetColor();
			m_newBrush.CreateSolidBrush(SolidRgb);
			m_SolidRGB.GetWindowRect(&m_GetPictureRect);
			m_SPen.DeleteObject();
			m_SPen.CreatePen(PS_SOLID,1,SolidRgb);
			ScreenToClient(&m_GetPictureRect);
			m_oldBrush = clientDC.SelectObject(&m_newBrush);
			clientDC.Rectangle(m_GetPictureRect);
			clientDC.SelectObject(m_oldBrush);
			m_newBrush.DeleteObject();

			MessageBox(_T("已选择SolidStyle风格模式画笔颜色！"), _T("信息提示"), MB_ICONINFORMATION);
		}
	}
	GetDlgItem(IDC_STATICDASHAPENRGB)->GetWindowRect(&m_ClickedRct);
	if (m_ClickedRct.PtInRect(ptCurPos))
	{
		CColorDialog DlgDashaRGB(DashaRgb);
		CRect m_GetPictureRect;
		CBrush m_newBrush;
		CBrush* m_oldBrush;
		CClientDC clientDC(this);
		if (IDOK == DlgDashaRGB.DoModal())
		{
			DashaRgb = DlgDashaRGB.GetColor();
			m_newBrush.CreateSolidBrush(DashaRgb);
			m_DashRGB.GetWindowRect(&m_GetPictureRect);
			m_DPen.DeleteObject();
			m_DPen.CreatePen(PS_DASHDOT, 1, DashaRgb);
			ScreenToClient(&m_GetPictureRect);
			m_oldBrush = clientDC.SelectObject(&m_newBrush);
			clientDC.Rectangle(m_GetPictureRect);
			clientDC.SelectObject(m_oldBrush);
			m_newBrush.DeleteObject();
			MessageBox(_T("已选择DashDot风格模式画笔颜色！"), _T("信息提示"), MB_ICONINFORMATION);
		}
	}
	GetDlgItem(IDC_STATICHANDLERGB)->GetWindowRect(&m_ClickedRct);
	if (m_ClickedRct.PtInRect(ptCurPos))
	{
		CColorDialog DlgHandRGB(m_ColorHandle);
		CRect m_GetPictureRect;
		CBrush m_newBrush;
		CBrush* m_oldBrush;
		CClientDC clientDC(this);
		if (IDOK == DlgHandRGB.DoModal())
		{
			m_ColorHandle = DlgHandRGB.GetColor();
			m_newBrush.CreateSolidBrush(m_ColorHandle);
			m_handleRGB.GetWindowRect(&m_GetPictureRect);
			ScreenToClient(&m_GetPictureRect);
			m_oldBrush = clientDC.SelectObject(&m_newBrush);
			clientDC.Rectangle(m_GetPictureRect);
			clientDC.SelectObject(m_oldBrush);
			m_newBrush.DeleteObject();
			MessageBox(_T("已成功选择Handle调节手柄的颜色！"), _T("信息提示"), MB_ICONINFORMATION);
		}	
	}
	GetDlgItem(IDC_STATICRECTANGE)->GetWindowRect(&m_ClickedRct);
	if (m_ClickedRct.PtInRect(ptCurPos))
	{
		CColorDialog DlgRectangeRGB(m_RectangeRgb);
		CRect m_GetPictureRect;
		CBrush m_newBrush;
		CBrush* m_oldBrush;
		CClientDC clientDC(this);
		if (IDOK == DlgRectangeRGB.DoModal())
		{
			m_RectangeRgb = DlgRectangeRGB.GetColor();
			m_newBrush.CreateSolidBrush(m_RectangeRgb);
			m_RectRGB.GetWindowRect(&m_GetPictureRect);
			ScreenToClient(&m_GetPictureRect);
			m_oldBrush = clientDC.SelectObject(&m_newBrush);
			clientDC.Rectangle(m_GetPictureRect);
			clientDC.SelectObject(m_oldBrush);
			m_newBrush.DeleteObject();
			MessageBox(_T("已成功选择绘制边框颜色！"), _T("信息提示"), MB_ICONINFORMATION);
		}
	}
	CDialogEx::OnLButtonUp(nFlags, point);
}


void CMFCApplicationCRectTrackerDlg::OnSize(UINT nType, int cx, int cy)
{
	CDialogEx::OnSize(nType, cx, cy);
}


void CMFCApplicationCRectTrackerDlg::OnNMCustomdrawSliderhandlesize(NMHDR* pNMHDR, LRESULT* pResult)
{
	LPNMCUSTOMDRAW pNMCD = reinterpret_cast<LPNMCUSTOMDRAW>(pNMHDR);
	int m_GetSliderValue = m_HandleSize.GetPos();
	SetDlgItemInt(IDC_STATICSLIDERVALUE, m_GetSliderValue);
	*pResult = 0;
}

工程文件H头文件：?

#include"CMyCrectTracker.h"
#pragma once

class CMFCApplicationCRectTrackerDlg : public CDialogEx
{

public:
	CMFCApplicationCRectTrackerDlg(CWnd* pParent = nullptr);	

#ifdef AFX_DESIGN_TIME
	enum { IDD = IDD_MFCAPPLICATIONCRECTTRACKER_DIALOG };
#endif

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	

protected:
	HICON m_hIcon;
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	DECLARE_MESSAGE_MAP()
public:
	
	CMyCrectTracker m_rctCurTracker;				//当前选中的矩形区域
	CMyCrectTracker m_rctTracker[MAX_RECT_NUM];		//存储自绘矩形区域
	BOOL			m_IsChose;						//标记是否选中
	BOOL			m_IsDraw;						//标记按钮是否按下
	int				m_rectNum;						//当前实际已绘矩形的个数
	int				m_rectChoseNum;					//当前选中矩形的编号
	int				m_FlaMoveStep;					//键盘方向键没响应一次图像移动的像素单位上的步长
	int				m_dirct;						//用于标记那个方向键按下。1：左，2：右，3：上，4：下，5：delete
	UINT            StyleSelected;
	UINT            HandleDirSelected;
	virtual BOOL PreTranslateMessage(MSG* pMsg);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
	afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
	afx_msg void OnBnClickedButtondraw();
	afx_msg void ChangeRectPt(int ChangeDir);
	afx_msg void OnBnClickedButtonsavepicture();
	CComboBox m_Style;
	CComboBox m_MoveStep;
	CButton m_ResizeInside;
	CButton m_ResizeOutside;
	CSliderCtrl m_HandleSize;
	afx_msg void OnBnClickedCheckresizeinside();
	afx_msg void OnBnClickedCheckresizeoutside();
	afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	CStatic m_SolidRGB;
	CStatic m_DashRGB;
	CStatic m_handleRGB;
	CStatic m_RectRGB;
	afx_msg void OnSize(UINT nType, int cx, int cy);
	afx_msg void OnNMCustomdrawSliderhandlesize(NMHDR* pNMHDR, LRESULT* pResult);
};