MFC CRichEditCtrl实现不同行不同颜色

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MFC CRichEditCtrl实现不同行不同颜色
1.首先在添加在资源视图中添加CRichEditCtrl控件，并关联变量：


注意将属性Multiline和Read Only设为True:


2.初始化控件
在BOOL CRichEditTestApp::InitInstance()函数中添加：

1. ...
   
2. if (!AfxInitRichEdit2())
   
3. {
   
4.     return FALSE;
   
5. }
   
6. ...

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3. 设置字体大小颜色

1. int CRichEditTestDlg::GetNumVisibleLines(CRichEditCtrl* pCtrl)
   
2. {
   
3.     CRect rect;
   
4.     long nFirstChar, nLastChar;
   
5.     long nFirstLine, nLastLine;
   
6. 
   
7.     // Get client rect of rich edit control
   
8.     pCtrl->GetClientRect(rect);
   
9. 
   
10.     // Get character index close to upper left corner
    
11.     nFirstChar = pCtrl->CharFromPos(CPoint(0, 0));
    
12. 
    
13.     // Get character index close to lower right corner
    
14.     nLastChar = pCtrl->CharFromPos(CPoint(rect.right, rect.bottom));
    
15.     if (nLastChar < 0)
    
16.     {
    
17.         nLastChar = pCtrl->GetTextLength();
    
18.     }
    
19. 
    
20.     // Convert to lines
    
21.     nFirstLine = pCtrl->LineFromChar(nFirstChar);
    
22.     nLastLine = pCtrl->LineFromChar(nLastChar);
    
23. 
    
24.     return (nLastLine - nFirstLine);
    
25. }
    
26. 
    
27. int CRichEditTestDlg::AppendToLogAndScroll(const CString& csMsg, COLORREF color, int iFontSize)
    
28. {
    
29.     long nVisible = 0;
    
30.     long nInsertionPoint = 0;
    
31.     CHARFORMAT cf;
    
32.     m_richEdit.GetSelectionCharFormat(cf);
    
33.     // Initialize character format structure
    
34.     cf.cbSize = sizeof(CHARFORMAT);
    
35.     //static int iHeight = 1000;
    
36.     cf.dwMask |= CFM_BOLD;
    
37.     cf.dwEffects |= CFE_BOLD;//设置粗体，取消用cf.dwEffects&=~CFE_BOLD;
    
38.     cf.dwEffects &= ~CFE_AUTOCOLOR;
    
39.     cf.dwMask |= CFM_COLOR;
    
40.     cf.crTextColor = color;
    
41.     cf.dwMask |= CFM_SIZE;
    
42.     cf.yHeight = iFontSize;//设置高度
    
43.     cf.dwMask |= CFM_FACE;
    
44.     _tcscpy_s(cf.szFaceName, _T("微软雅黑"));//设置字体
    
45.     // Set insertion point to end of text
    
46.     nInsertionPoint = m_richEdit.GetWindowTextLength();
    
47.     m_richEdit.SetSel(nInsertionPoint, -1);
    
48. 
    
49.     // Set the character format
    
50.     m_richEdit.SetSelectionCharFormat(cf);
    
51. 
    
52.     // Replace selection. Because we have nothing
    
53.     // selected, this will simply insert
    
54.     // the string at the current caret position.
    
55.     m_richEdit.ReplaceSel(csMsg);
    
56. 
    
57.     // Get number of currently visible lines or maximum number of visible lines
    
58.     // (We must call GetNumVisibleLines() before the first call to LineScroll()!)
    
59.     nVisible = GetNumVisibleLines(&m_richEdit);
    
60. 
    
61.     // Now this is the fix of CRichEditCtrl's abnormal behaviour when used
    
62.     // in an application not based on dialogs. Checking the focus prevents
    
63.     // us from scrolling when the CRichEditCtrl does so automatically,
    
64.     // even though ES_AUTOxSCROLL style is NOT set.
    
65.     if (&m_richEdit != m_richEdit.GetFocus())
    
66.     {
    
67.         m_richEdit.LineScroll(INT_MAX);
    
68.         m_richEdit.LineScroll(1 - nVisible);
    
69.     }
    
70. 
    
71.     return 0;
    
72. }

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4.使用示例：

1. void CRichEditTestDlg::OnBnClickedTest()
   
2. {
   
3.     CString strPerRet;
   
4.     strPerRet.Format(_T("红色行\n"));
   
5.     AppendToLogAndScroll(strPerRet, RGB(255, 0, 0), 300);
   
6. 
   
7.     strPerRet.Format(_T("绿色行\n"));
   
8.     AppendToLogAndScroll(strPerRet, RGB(0, 255, 0), 300);
   
9. 
   
10.     strPerRet.Format(_T("蓝色行\n"));
    
11.     AppendToLogAndScroll(strPerRet, RGB(0, 0, 255), 300);
    
12. }

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5.效果图