MFC基于Static控件的双缓存实时曲线

 // MFCApplication1Dlg.cpp: 实现文件 // #include "pch.h" #include "framework.h" #include "MFCApplication1.h" #include "MFCApplication1Dlg.h" #include "afxdialogex.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // 用于应用程序“关于”菜单项的 CAboutDlg 对话框 class CAboutDlg : public CDialogEx { public: CAboutDlg(); // 对话框数据 #ifdef AFX_DESIGN_TIME enum { IDD = IDD_ABOUTBOX }; #endif protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持 // 实现 protected: DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX) { } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialogEx::DoDataExchange(pDX); } BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx) END_MESSAGE_MAP() // CMFCApplication1Dlg 对话框 CMFCApplication1Dlg::CMFCApplication1Dlg(CWnd* pParent /*=nullptr*/) : CDialogEx(IDD_MFCAPPLICATION1_DIALOG, pParent) { m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); xLine = 0; m_dYTop = 10; m_dYBottom = 0; m_dXRight = 8; m_dXLeft = 0; } void CMFCApplication1Dlg::DoDataExchange(CDataExchange* pDX) { CDialogEx::DoDataExchange(pDX); DDX_Control(pDX, IDC_STATIC_1, m_Static); } BEGIN_MESSAGE_MAP(CMFCApplication1Dlg, CDialogEx) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_WM_TIMER() END_MESSAGE_MAP() // CMFCApplication1Dlg 消息处理程序 BOOL CMFCApplication1Dlg::OnInitDialog() { CDialogEx::OnInitDialog(); // 将“关于...”菜单项添加到系统菜单中。 // IDM_ABOUTBOX 必须在系统命令范围内。 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); } } // 设置此对话框的图标。 当应用程序主窗口不是对话框时，框架将自动 // 执行此操作 SetIcon(m_hIcon, TRUE); // 设置大图标 SetIcon(m_hIcon, FALSE); // 设置小图标 // TODO: 在此添加额外的初始化代码 SetTimer(0, 1000, NULL); return TRUE; // 除非将焦点设置到控件，否则返回 TRUE } void CMFCApplication1Dlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialogEx::OnSysCommand(nID, lParam); } } // 如果向对话框添加最小化按钮，则需要下面的代码 // 来绘制该图标。 对于使用文档/视图模型的 MFC 应用程序， // 这将由框架自动完成。 void CMFCApplication1Dlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // 用于绘制的设备上下文 SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // 使图标在工作区矩形中居中 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; // 绘制图标 dc.DrawIcon(x, y, m_hIcon); } else { CDialogEx::OnPaint(); } } //当用户拖动最小化窗口时系统调用此函数取得光标 //显示。 HCURSOR CMFCApplication1Dlg::OnQueryDragIcon() { return static_cast<HCURSOR>(m_hIcon); } void CMFCApplication1Dlg::OnTimer(UINT_PTR nIDEvent) { // TODO: 在此添加消息处理程序代码和/或调用默认值 CWnd *pWin = GetDlgItem(IDC_STATIC_1); CRect rect; pWin->GetClientRect(rect); m_rtWave.SetRect(rect.left, rect.top, rect.right, rect.bottom); CDC *pDc = pWin->GetDC(); m_MemDC.CreateCompatibleDC(pDc); m_MemBitmap.CreateCompatibleBitmap(pDc, rect.Width(), rect.Height()); //把内存位图选进内存DC中用来保存在内存DC中绘制的图形 m_MemDC.SelectObject(&m_MemBitmap); rtWave.SetRect(m_rtWave.left + 60, m_rtWave.top + 30, m_rtWave.right - 60, m_rtWave.bottom - 30); xLine++; num = rand() / 10; ValSave.insert(ValSave.end(),num); DrawBK(&m_MemDC); DrawWave(&m_MemDC); pDc->BitBlt(0, 0, m_rtWave.Width(), m_rtWave.Height(), &m_MemDC, 0, 0, SRCCOPY); m_MemBitmap.DeleteObject(); m_MemDC.DeleteDC(); ReleaseDC(pDc); CDialogEx::OnTimer(nIDEvent); } void CMFCApplication1Dlg::DrawBK(CDC * pDC) { // TODO: 在此处添加实现代码. //画背景 CBrush myBrush; myBrush.CreateSolidBrush(RGB(192, 250, 233)); pDC->FillRect(m_rtWave, &myBrush); pDC->FillSolidRect(m_rtWave, RGB(192, 250, 233)); CSize sz; CString s; CPoint pts[10]; CPen penDot; penDot.CreatePen(PS_DOT, 1, RGB(100, 100, 100)); CPen* pOldPen = NULL; CFont* pOldFont = NULL; // 画X轴网格和刻度 int cx; int nPos; int nXCount = 10; int dXStep = 0; CString m_strXName; cx = rtWave.Width() / nXCount; s.Format(_T("%d"), ValSave.size()); sz = pDC->GetTextExtent(s); if (cx < sz.cx+5) { cx = sz.cx+5; nXCount = rtWave.Width() / cx; } double x; m_dXRight = max(m_dXRight, xLine); if (nXCount > 0) { dXStep = (int)((m_dXRight - m_dXLeft) / nXCount); dXStep = max(1, dXStep); nXCount = (int)((m_dXRight - m_dXLeft) / dXStep); } x = m_dXLeft; s.Format(_T("%d"), x); sz = pDC->GetTextExtent(s); pDC->SetTextColor(RGB(10, 10, 10)); pDC->TextOut(rtWave.left - sz.cx / 2, rtWave.bottom + sz.cy / 2, s); pDC->SelectObject(&penDot); for (int i = 0; i < nXCount; i++) { x += dXStep; nPos = (int)((x - m_dXLeft)*rtWave.Width() / (m_dXRight - m_dXLeft)); pts[0].x = rtWave.left + nPos; pts[0].y = rtWave.top; pts[1].x = rtWave.left + nPos; pts[1].y = rtWave.bottom; pDC->Polyline(pts, 2); s.Format(_T("%.0f"), x); sz = pDC->GetTextExtent(s); pDC->TextOut(rtWave.left + nPos - sz.cx / 2, rtWave.bottom + sz.cy / 2, s); } // X轴名称 pDC->SetTextColor(RGB(10, 10, 10)); m_strXName = "时间(s)"; sz = pDC->GetTextExtent(m_strXName); pDC->TextOut(rtWave.left + rtWave.Width() + 2, rtWave.bottom - sz.cy / 2, m_strXName); // 画Y轴网格和刻度 int cy; int nYCount = 8; CString m_strYName; cy = rtWave.Height() / nYCount; sz = pDC->GetTextExtent(_T("123456")); if (cy < sz.cy) { cy = sz.cy; nYCount = rtWave.Height() / cy; } double dYStep = 0; double y; m_dYTop = max(m_dYTop, num); if (nYCount > 0) { dYStep = (m_dYTop - m_dYBottom) / nYCount; } y = m_dYBottom; s.Format(_T("%.2f"), y); sz = pDC->GetTextExtent(s); pDC->SetTextColor(RGB(10, 10, 10)); pDC->TextOut(rtWave.left - sz.cx - 5, rtWave.bottom - sz.cy / 2, s); pDC->SelectObject(&penDot); for (int i = 0; i < nYCount; i++) { y += dYStep; nPos = (int)((y - m_dYBottom)*rtWave.Height() / (m_dYTop - m_dYBottom)); pts[0].x = rtWave.left; pts[0].y = rtWave.bottom - nPos; pts[1].x = rtWave.right; pts[1].y = rtWave.bottom - nPos; pDC->Polyline(pts, 2); //压力 s.Format(_T("%.2f"), y); sz = pDC->GetTextExtent(s); pDC->TextOut(rtWave.left - sz.cx - 5, rtWave.bottom - nPos - sz.cy / 2, s); } // Y轴名称 pDC->SetTextColor(RGB(10, 10, 10)); m_strYName = "压力(kPa)"; sz = pDC->GetTextExtent(m_strYName); pDC->TextOut(rtWave.left - sz.cx / 2, rtWave.top - sz.cy * 3 / 2, m_strYName); //画XY轴 CPen pen(PS_INSIDEFRAME, 2, RGB(0, 0, 192)); //设置画笔 CPen GreenPen(PS_INSIDEFRAME, 2, RGB(0, 255, 0)); CPen YellowPen(PS_INSIDEFRAME, 2, RGB(250, 250, 0)); pDC->SelectObject(&pen); pts[0].x = rtWave.left; pts[0].y = rtWave.top; pts[1].x = rtWave.left; pts[1].y = rtWave.bottom; pts[2].x = rtWave.right; pts[2].y = rtWave.bottom; pDC->Polyline(pts, 3); pDC->SelectObject(pOldPen); pDC->SelectOb