1.设置edit只读属性
方法一:m_edit1.SetReadOnly(TRUE);
方法二:::SendMessage(m_edit1.m_hWnd, EM_SETREADONLY, TRUE, 0);
2.判断edit中光标状态并得到选中内容(richedit同样适用)
int nStart, nEnd;
CString strTemp;
m_edit1.GetSel(nStart, nEnd);
if(nStart == nEnd)
{
strTemp.Format(_T(" 光标在%d" ), nStart);
AfxMessageBox(strTemp);
}
else
{
//得到edit选中的内容
m_edit1.GetWindowText(strTemp);
strTemp = strTemp.Mid(nStart) - strTemp.Mid(nEnd);
AfxMessageBox(strTemp);
}
注:GetSel后,如果nStart和nEnd,表明光标处于某个位置(直观来看就是光标在闪动);
如果nStart和nEnd不相等,表明用户在edit中选中了一段内容。
3.在edit最后添加字符串
CString str;
m_edit1.SetSel(-1, -1);
m_edit1.ReplaceSel(str);
4.随输入自动滚动到最后一行(richedit同样适用)
方法一:(摘自msdn)
// The pointer to my edit.
extern CEdit* pmyEdit;
int nFirstVisible = pmyEdit-> GetFirstVisibleLine();
// Scroll the edit control so that the first visible line
// is the first line of text.
if (nFirstVisible > 0)
{
pmyEdit-> LineScroll(-nFirstVisible, 0);
}
方法二:m_richedit.PostMessage(WM_VSCROLL, SB_BOTTOM, 0);
5.如何限制edit输入指定字符
可以从CEdit派生一个类,添加WM_CHAR消息映射。下面一个例子实现了限定输入16进制字符的功能。
void CMyHexEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
if ( (nChar > = 0 && nChar < = 9) ||
(nChar > = a & & nChar < = f) ||
(nChar > = A && nChar < = F) ||
nChar == VK_BACK ||
nChar == VK_DELETE) //msdn的virtual key
{
CEdit::OnChar(nChar, nRepCnt, nFlags);
}
}
6.如何使用richedit
添加AfxInitRichEdit();
CxxxApp::InitInstance()
{
AfxInitRichEdit();
.............
}
AfxInitRichEdit()功能:装载 RichEdit 1.0 Control (RICHED32.DLL).
7.如何使用richedit2.0 or richedit3.0
使用原因:由于RichEdit2.0A自动为宽字符(WideChar),所以它可以解决中文乱码以及一些汉字问题
方法一:(msdn上的做法,适用于用VC.NET及以后版本创建的工程)
To update rich edit controls in existing Visual C++ applications to version 2.0,
open the .RC file as text, change the class name of each rich edit control from " RICHEDIT" to " RichEdit20a" .
Then replace the call to AfxInitRichEdit with AfxInitRichEdit2.
方法二:以对话框为例:
(1) 增加一全局变量 HMODULE hMod;
(2) 在CxxxApp::InitInstance()中添加一句hMod = LoadLibrary(_T(" riched20.dll" ));
在CxxxApp::ExitInstance()中添加一句FreeLibrary(hMod);
(3) 在对话框上放一个richedit,文本方式打开.rc文件修改该richedit控件的类名" RICHEDIT" to " RichEdit20a" .
(4) 在对话框头文件添加 CRichEditCtrl m_richedit;
在OnInitDialog中添加 m_richedit.SubclassDlgItem(IDC_RICHEDIT1, this);
8.改变richedit指定区域的颜色及字体
CHARFORMAT cf;
ZeroMemory(&cf, sizeof(CHARFORMAT));
cf.cbSize = sizeof(CHARFORMAT);
cf.dwMask = CFM_BOLD | CFM_COLOR | CFM_FACE |
CFM_ITALIC | CFM_SIZE | CFM_UNDERLINE;
cf.dwEffects = 0;
cf.yHeight = 12*12; //文字高度
cf.crTextColor = RGB(200, 100, 255); //文字颜色
strcpy(cf.szFaceName ,_T(" 隶书" )); //设置字体
m_richedit1.SetSel(1, 5); //设置处理区域
m_richedit1.SetSelectionCharFormat(cf);
9.设置行间距(只适用于richedit2.0)
PARAFORMAT2 pf;
pf2.cbSize = sizeof(PARAFORMAT2);
pf2.dwMask = PFM_LINESPACING | PFM_SPACEAFTER;
pf2.dyLineSpacing = 200;
pf2.bLineSpacingRule = 4;
m_richedit.SetParaFormat(pf2);
10.richedit插入位图
Q220844:How to insert a bitmap into an RTF document using the RichEdit control in Visual C++ 6.0
http://support.microsoft.com/default.aspx?scid=kb; en-us; 220844
http://www.codeguru.com/Cpp/controls/richedit/article.php/c2417/
http://www.codeguru.com/Cpp/controls/richedit/article.php/c5383/
11.richedit插入gif动画
http://www.codeproject.com/richedit/AnimatedEmoticon.asp
12.richedit嵌入ole对象
http://support.microsoft.com/kb/141549/en-us
13.使richedit选中内容只读
http://www.codeguru.com/cpp/controls/richedit/article.php/c2401/
14.打印richedit
http://www.protext.com/MFC/RichEdit3.htm
15.richeidt用于聊天消息窗口
http://www.vckbase.com/document/viewdoc/?id=1087
http://www.codeproject.com/richedit/chatrichedit.asp
http://www.codeguru.com/Cpp/controls/richedit/article.php/c2395/
16.解决richedit的EN_SETFOCUS和EN_KILLFOCUS无响应的问题
http://support.microsoft.com/kb/181664/en-us
17.richedit拼写检查
http://www.codeproject.com/com/AutoSpellCheck.asp
18.改变edit背景色
Q117778:How to change the background color of an MFC edit control
http://support.microsoft.com/kb/117778/en-us
19.当edit控件的父窗口属性是带标题栏WS_CAPTION和子窗口WS_CHILD时,不能设置焦点SetFocus
Q230587:PRB: Cant Set Focus to an Edit Control When its Parent Is an Inactive Captioned Child Window
http://support.microsoft.com/kb/230587/en-us
20. 在Edit中回车时,会退出对话框
选中Edit的风格Want Return。
MSDN的解释如下:
ES_WANTRETURN Specifies that a carriage return be inserted when the user presses the ENTER key while entering text into a multiple-line edit control in a dialog box. Without this style, pressing the ENTER key has the same effect as pressing the dialog boxs default pushbutton. This style has no effect on a single-line edit control.
21. 动态创建的edit没有边框的问题
m_edit.Create(....);
m_edit.ModifyStyleEx(0, WS_EX_CLIENTEDGE, SWP_DRAWFRAME);
22. 一个能显示RTF,ole(包括gif, wmv,excel ,ppt)的例子
http://www.codeproject.com/richedit/COleRichEditCtrl.asp