VC中RichEdit 控件的使用

時(shí)間：2018-12-11 10:54:01

關(guān)鍵字： c++ 控件 richedit

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[導(dǎo)讀]?在mfc中使用工具欄里的RichEdit 控件時(shí),應(yīng)該在程序初始話時(shí)加入AfxInitRichEdit,或者?AfxInitRichEdit2?否則的話程序會(huì)起不來.也沒有任何錯(cuò)誤信息.這倆函數(shù)

?在mfc中使用工具欄里的RichEdit 控件時(shí),應(yīng)該在程序初始話時(shí)加入AfxInitRichEdit,或者?AfxInitRichEdit2?
否則的話程序會(huì)起不來.也沒有任何錯(cuò)誤信息.
這倆函數(shù) 是加載 Riched20.dll(Riched32.dll?)的.

1.設(shè)置edit只讀屬性

??? 方法一：
??????????????? m_edit1.SetReadOnly(TRUE);
??? 方法二：
??????????????? ::SendMessage(m_edit1.m_hWnd, EM_SETREADONLY, TRUE, 0);

2.判斷edit中光標(biāo)狀態(tài)并得到選中內(nèi)容(richedit同樣適用)

??????? int nStart, nEnd;
??????? CString strTemp;

??????? m_edit1.GetSel(nStart, nEnd);
??????? if(nStart == nEnd)
??????? {
??????????? strTemp.Format(_T("光標(biāo)在%d"), nStart);
??????????? AfxMessageBox(strTemp);
??????? }
??????? else
??????? {
??????????? //得到edit選中的內(nèi)容?????
??????????? m_edit1.GetWindowText(strTemp);
??????????? strTemp = strTemp.Mid(nStart) - strTemp.Mid(nEnd);
??????????? AfxMessageBox(strTemp);?
??????? }
??? 注：GetSel后，如果nStart和nEnd，表明光標(biāo)處于某個(gè)位置（直觀來看就是光標(biāo)在閃動(dòng)）；
???????????? 如果nStart和nEnd不相等，表明用戶在edit中選中了一段內(nèi)容。

3.在edit最后添加字符串

??????? CString str;
??????? m_edit1.SetSel(-1, -1);
??????? m_edit1.ReplaceSel(str);

4.隨輸入自動(dòng)滾動(dòng)到最后一行(richedit同樣適用)

??? 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輸入指定字符

?? 可以從CEdit派生一個(gè)類，添加WM_CHAR消息映射。下面一個(gè)例子實(shí)現(xiàn)了限定輸入16進(jìn)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：裝載 RichEdit 1.0 Control (RICHED32.DLL).

7.如何使用richedit2.0 or richedit3.0

??? 使用原因：由于RichEdit2.0A自動(dòng)為寬字符（WideChar），所以它可以解決中文亂碼以及一些漢字問題

??? 方法一：（msdn上的做法，適用于用VC.NET及以后版本創(chuàng)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：以對(duì)話框?yàn)槔?br />?????? (1)??? 增加一全局變量 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)??? 在對(duì)話框上放一個(gè)richedit，文本方式打開.rc文件修改該richedit控件的類名"RICHEDIT" to "RichEdit20a".
??? ?? (4)??? 在對(duì)話框頭文件添加 CRichEditCtrl m_richedit;
??? ??? ??? 在OnInitDialog中添加 m_richedit.SubclassDlgItem(IDC_RICHEDIT1, this);

8.改變r(jià)ichedit指定區(qū)域的顏色及字體

??????? 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); //文字顏色
??????? strcpy(cf.szFaceName ,_T("隸書"));//設(shè)置字體
?????
??????? m_richedit1.SetSel(1, 5); //設(shè)置處理區(qū)域
??????? m_richedit1.SetSelectionCharFormat(cf);

9.設(shè)置行間距（只適用于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插入位圖

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動(dòng)畫

http://www.codeproject.com/richedit/AnimatedEmoticon.asp

12.richedit嵌入ole對(duì)象

http://support.microsoft.com/kb/141549/en-us

13.使richedit選中內(nèi)容只讀

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.解決richedit的EN_SETFOCUS和EN_KILLFOCUS無響應(yīng)的問題

http://support.microsoft.com/kb/181664/en-us

17.richedit拼寫檢查

http://www.codeproject.com/com/AutoSpellCheck.asp

18.改變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.當(dāng)edit控件的父窗口屬性是帶標(biāo)題欄WS_CAPTION和子窗口WS_CHILD時(shí)，不能設(shè)置焦點(diǎn)SetFocus

Q230587：PRB: Can't 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中回車時(shí)，會(huì)退出對(duì)話框?

選中Edit的風(fēng)格Want Return。

MSDN的解釋如下：
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 box's default pushbutton. This style has no effect on a single-line edit control.

21. 動(dòng)態(tài)創(chuàng)建的edit沒有邊框的問題

??? m_edit.Create(....);
??? m_edit.ModifyStyleEx(0, WS_EX_CLIENTEDGE, SWP_DRAWFRAME);

22. 一個(gè)能顯示RTF，ole（包括gif， wmv，excel ，ppt）的例子

Environment:?VC6 SP4, 2000.

Follow these 10 easy steps to build the OutLookRichEdit control:

Insert a rich edit control into the dialog. Call?AfxInitRichEdit()?in the InitInstance of the App class or in InitDialog. If it does not exist, copy OutLookRichEdit.cpp and OutLookRichEdit.h to the project directory. Click the menu choice Project-Add to Project-Files and select the above-copied files to add the wrapper class to your project. Import the hand cursor into the resource and rename it "IDC_LINK". Use Classwizard to add a member variable of the rich edit control (CRichEditCtrl). Include the OutLookRichEdit.h file in the dialog's header file and change the declaration of rich edit member variable, as in

CRichEditCtrl????m_ctrlText1;

COutLookRichEdit?m_ctrlText1;

In InitDialog(), add the following code.

m_ctrlText1.SetRawHyperText(_T("Click?to?see?the?about?box."));

At this level, if you build the project and run it, you can see the rich edit control with linked text, but nothing would happen if you clicked on the link.

To Show a dialog while the link is clicked, you have to add some more code in the dialog class. Before that, have a closer look at the preceding code and hypertext syntax. The link text is enclosed between the "$" symbols and the corresponding dialog's resource value 100 (About Box), enclosed in "#" symbols.

You can find the #define values of dialogs in the resource.h file.

Use ClassWizard to map OnNotify of the dialog and write the corresponding implementation code in .cpp file, like:

BOOL?CDEMODlg::OnNotify(WPARAM?wParam,
????????????????????????LPARAM?lParam,
????????????????????????LRESULT*?pResult)
{
??NMHDR*?pNmHdr?=?(NMHDR*)?lParam;
??if(IDC_RICHEDIT1?==?pNmHdr->idFrom){
????switch(pNmHdr->code)
????{
??????case?IDD_ABOUTBOX:
????????CAboutDlg?oDlg;
????????oDlg.DoModal?();
????????break;
????}
??}
??return?CDialog::OnNotify(wParam,?lParam,?pResult);
}

Now, build and run the project. It is recommended that you set the read-only attribute to the rich edit control. Downloads

Download demo project - 23 Kb
Download source - 6 Kb

在RichEdit中插入Bitmap

COleDataSource src;
STGMEDIUM sm;
sm.tymed=TYMED_GDI;
sm.hBitmap=hbmp;
sm.pUnkForRelease=NULL;
src.CacheData(CF_BITMAP, &sm);
LPDATAOBJECT lpDataObject =
(LPDATAOBJECT)src.GetInterface(&IID_IDataObject);
pRichEditOle->ImportDataObject(lpDataObject, 0, NULL);
lpDataObject->Release();

字體設(shè)置代碼

最后添加字體變換函數(shù)：?
CHARFORMAT cf;?
LOGFONT lf;?
memset(&cf, 0, sizeof(CHARFORMAT));?
memset(&lf, 0, sizeof(LOGFONT));?

//判斷是否選擇了內(nèi)容?
BOOL bSelect = (GetSelectionType() != SEL_EMPTY) ? TRUE : FALSE;?
if (bSelect)?
{?
???????????? GetSelectionCharFormat(cf);?
}?
else?
{?
???????????? GetDefaultCharFormat(cf);?
}?

//得到相關(guān)字體屬性?
BOOL bIsBold = cf.dwEffects & CFE_BOLD;?
BOOL bIsItalic = cf.dwEffects & CFE_ITALIC;?
BOOL bIsUnderline = cf.dwEffects & CFE_UNDERLINE;?
BOOL bIsStrickout = cf.dwEffects & CFE_STRIKEOUT;?

//設(shè)置屬性?
lf.lfCharSet = cf.bCharSet;?
lf.lfHeight = cf.yHeight/15;?
lf.lfPitchAndFamily = cf.bPitchAndFamily;?
lf.lfItalic = bIsItalic;?
lf.lfWeight = (bIsBold ? FW_BOLD : FW_NORMAL);?
lf.lfUnderline = bIsUnderline;?
lf.lfStrikeOut = bIsStrickout;?
sprintf(lf.lfFaceName, cf.szFaceName);?
?????????????

CFontDialog dlg(&lf);?
dlg.m_cf.rgbColors = cf.crTextColor;?
if (dlg.DoModal() == IDOK)?
{?
???????????? dlg.GetCharFormat(cf);//獲得所選字體的屬性?
???????????? if (bSelect)?
???????????????????????? SetSelectionCharFormat(cf);???? //為選定的內(nèi)容設(shè)定所選字體?
???????????? else?
???????????????????????? SetWordCharFormat(cf);???????? //為將要輸入的內(nèi)容設(shè)定字體?
}

在RichEdit中實(shí)現(xiàn)超鏈接

在RichEdit中實(shí)現(xiàn)超鏈接責(zé)任編輯：admin 　在CBuilder上制作更新日期：2005-8-6 ? 首先在Form上放置一個(gè)RichEdit。

在窗體的構(gòu)造函數(shù)中添加以下代碼：
__fastcall TMainForm::TMainForm(TComponent* Owner)
???????? : TForm(Owner)
{
???? unsigned mask = SendMessage(RichEdit1->Handle, EM_GETEVENTMASK, 0, 0);
???? SendMessage(RichEdit1->Handle, EM_SETEVENTMASK, 0, mask | ENM_LINK);
???? SendMessage(RichEdit1->Handle, EM_AUTOURLDETECT, true, 0);?? //自動(dòng)檢測(cè)URL

???? RichEdit1->Text = "歡迎訪問C++ Buildern"
?????????????????????? "網(wǎng)址: http://www.ccrun.comn"
?????????????????????? "偶的信箱:n"
?????????????????????? "mailto::info@ccrun.com n"
?????????????????????? "嘿嘿n";
}

重載窗體的WndProc

1。在.h中添加：

??? protected:
?????? virtual void __fastcall WndProc(Messages::TMessage &Message);

2。在.cpp中添加：
//---------------------------------------------------------------------------
void __fastcall TMainForm::WndProc(Messages::TMessage &Message)
{
???? if (Message.Msg == WM_NOTIFY)
???? {
???????? if (((LPNMHDR)Message.LParam)->code == EN_LINK)
???????? {
???????????? ENLINK* p = (ENLINK *)Message.LParam;
???????????? if (p->msg == WM_LBUTTONDOWN)
???????????? {
???????????????? SendMessage(RichEdit1->Handle, EM_EXSETSEL, 0, (LPARAM)&(p->chrg));
???????????????? ShellExecute(Handle, "open", RichEdit1->SelText.c_str(), 0, 0, SW_SHOWNORMAL);
???????????? }
???????? }
???? }
???? TForm::WndProc(Message);
}