1、 繪制思路：做一個自定義控件插入界面中具體步驟： （1）橫軸劃分為若干點，使用Moveto+Lineto連線，定時刷新實現動態效果；（2）在程序中，使用CPaintDC,CClientDc,CDC,CBitMap,CBrush等繪圖類；（3）繪圖程序分為幾大部分：注冊類句柄、刷新機制、設定坐標系、繪圖；部分代碼如下：BOOL CLineChartCtrl:RegisterWndClass(HINSTANCE hInstance)WNDCLASSW wc;wc.lpszClassName = TEXT(LineChartCtrl); / matches class name in client。

2、return (:RegisterClass(&wc) != 0 ); void CLineChartCtrl:InvalidateCtrl()CClientDC dc(this);CRect rcClient;GetClientRect(rcClient);if (m_MemDC.GetSafeHdc() = NULL)m_MemDC.CreateCompatibleDC(&dc);m_Bitmap.CreateCompatibleBitmap(&dc,rcClient.Width(),rcClient.Height();m_MemDC.SelectObject(m_Bitmap); m_M

3、emDC.SetBkColor(RGB(255,255,255); /靜態背景色CBrush bkBrush(RGB(160,160,160);m_MemDC.FillRect(rcClient,&bkBrush);InvalidateRect(rcClient, FALSE);float CLineChartCtrl:SetPos(int nIndex, float nPos)。void CLineChartCtrl:OnPaint() CPaintDC dc(this); / device context for paintingCRect rcClient;GetClientRect(r

4、cClient);/ draw scaleif (m_MemDC.GetSafeHdc() != NULL)dc.BitBlt(0, 0, rcClient.Width(), rcClient.Height(), &m_MemDC, 0, 0, SRCCOPY);void CLineChartCtrl:DrawSpike()CRect rcClient;GetClientRect(rcClient);if (m_MemDC.GetSafeHdc() != NULL) /豎線間隔寬度m_MemDC.BitBlt(0, 0, rcClient.Width(), rcClient.Height(),

5、 &m_MemDC, 20, 0, SRCCOPY);/ draw scaleCRect rcRight = rcClient;rcRight.left = rcRight.right - 20; m_MemDC.SetBkColor(RGB(255,255,255); /運行時背景色CBrush bkBrush(RGB(160,160,160); m_MemDC.FillRect(rcRight,&bkBrush);static BOOL bDrawVerticle = FALSE;bDrawVerticle = !bDrawVerticle;if (bDrawVerticle) CPen

6、pen(PS_SOLID, 1, RGB(128,128,128); /縱軸色CPen* pOldPen = m_MemDC.SelectObject(&pen);m_MemDC.MoveTo(CPoint(rcClient.right-2, rcClient.top);m_MemDC.LineTo(CPoint(rcClient.right-2, rcClient.bottom);m_MemDC.SelectObject(pOldPen);int nCount = m_items.GetSize();CLineChartItem* pItem;CPoint ptOld, ptNew;for

7、(int i=0; im_nUpper - pItem-m_nLower;ptOld.x = rcRight.left-1; / Minus one to make sure to draw inside the areaptNew.x = rcRight.right-1;ptOld.y = (int)(float)(nRange - pItem-m_nOldPos)/(float)nRange)* (float)rcRight.Height();ptNew.y = (int)(float)(nRange - pItem-m_nPos)/(float)nRange)* (float)rcRig

8、ht.Height();CPen pen(PS_SOLID, 1, pItem-m_colorLine);CPen* pOldPen = m_MemDC.SelectObject(&pen);m_MemDC.MoveTo(ptOld);m_MemDC.LineTo(ptNew);m_MemDC.SelectObject(pOldPen);BOOL CLineChartCtrl:Add(COLORREF color, float Upper, float Lower)CLineChartItem* pItem = new CLineChartItem;pItem-m_colorLine = co

9、lor;pItem-m_nLower = Lower;pItem-m_nUpper = Upper;pItem-m_nPos = 0;pItem-m_nOldPos = 0;try m_items.Add(pItem);InvalidateCtrl();return TRUE; catch (CMemoryException* e)if (pItem !=NULL) delete pItem;e-Delete();return FALSE;void CLineChartCtrl:Go()DrawSpike();Invalidate(FALSE); 注意的幾點：(1) Windows CE采用u

10、nicode，必須寫諸如WNDCLASSW;LoadCursorW;(2) EVC下的CBrush不能使用兩個參數如CBrush(HS_Cross,RGB(0,0,0)； (3)改動stdAfx.h包含的頭文件； (4)在void CVoltagecontrolDlg:DoDataExchange(CDataExchange* pDX)里加入 DDX_Control(pDX, IDC_LineChartCtrl, m_LineChart); 在BOOL CVoltagecontrolDlg:OnInitDialog()里加入 m_LineChart.SubclassDlgItem(IDC_LineChartCtrl, this); (5)在設置自定義空間屬性ID必須為IDC_LineChartCtrl，CLASS為LineChartCtrl，相應程序里的注冊句柄名稱也設成LineChartCtrl； (6)程序中改變豎線間隔的是其寬度，而畫豎線的時間間隔是2*Timer； 現有的運行效果：橫軸采用五個Edit控件使時間