使用Rich Edit控件

 VC中在對話框上使用Rich Edit控件前一定要用AfxInitRichEdit()初始化RichEd...

1.設置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中光標狀態並得到選中內容(richedit同樣適用)

        int nStart, nEnd;
        CString strTemp;

        m_edit1.GetSel(nStart, nEnd);
        if(nStart == nEnd)
        {
            strTemp.Format(_T("光標在%d"), nStart);
            AfxMessageBox(strTemp);
        }
        else
        {
            //得到edit選中的內容    
            m_edit1.GetWindowText(strTemp);
            strTemp = strTemp.Mid(nStart) - strTemp.Mid(nEnd);
            AfxMessageBox(strTemp);
        }
    注：GetSel後，如果nStart和nEnd，表明光標處於某個位置（直觀來看就是光標在閃動）；
             如果nStart和nEnd不相等，表明用戶在edit中選中了一段內容。

---

3.在edit最後添加字符串

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

---

4.隨輸入自動滾動到最後一行(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派生一個類，添加WM_CHAR消息映射。下面一個例子實現了限定輸入16進制字符的功能。

   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);
        }   
   }

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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：由於RichEdit2.0A自動爲寬字符（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，適用於用VC.NET及以後版本創建的工程）
            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：以對話框爲例：
       (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)    在對話框上放一個richedit，文本方式打開.rc文件修改該richedit控件的類名"RICHEDIT" to "RichEdit20a".
       (4)    在對話框頭文件添加 CRichEditCtrl m_richedit;
            在OnInitDialog中添加 m_richedit.SubclassDlgItem(IDC_RICHEDIT1, this);

---

8.改變richedit指定區域的顏色及字體

        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"));//設置字體
    
        m_richedit1.SetSel(1, 5); //設置處理區域
        m_richedit1.SetSelectionCharFormat(cf);

---

9.設置行間距（只適用於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/

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11.richedit插入gif動畫

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

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12.richedit嵌入ole對象

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

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13.使richedit選中內容只讀

http://www.codeguru.com/cpp/controls/richedit/article.php/c2401/

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14.打印richedit

http://www.protext.com/MFC/RichEdit3.htm

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15.richeidt用於聊天消息窗口

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/

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16.解決richedit的EN_SETFOCUS和EN_KILLFOCUS無響應的問題

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

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17.richedit拼寫檢查

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

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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

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19.當edit控件的父窗口屬性是帶標題欄WS_CAPTION和子窗口WS_CHILD時，不能設置焦點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

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20. 在Edit中回車時，會退出對話框

選中Edit的風格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.

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21. 動態創建的edit沒有邊框的問題

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

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

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

轉自

http://blog.csdn.net/lixiaosan/archive/2006/04/06/652795.aspx

Environment: VC6 SP4, 2000.

Follow these 10 easy steps to build the OutLookRichEdit control:

1. Insert a rich edit control into the dialog.
2. Call AfxInitRichEdit() in the InitInstance of the App class or in InitDialog.
3. If it does not exist, copy OutLookRichEdit.cpp and OutLookRichEdit.h to the project directory.
4. Click the menu choice Project-Add to Project-Files and select the above-copied files to add the wrapper class to your project.
5. Import the hand cursor into the resource and rename it "IDC_LINK".
6. Use Classwizard to add a member variable of the rich edit control (CRichEditCtrl).
7. 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;

   to

   COutLookRichEdit m_ctrlText1;

8. In InitDialog(), add the following code.

   m_ctrlText1.SetRawHyperText(_T("Click <%$here$#100#%>
                                   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.

9. 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);
   }

10. 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();

字體設置代碼

最後添加字體變換函數：
CHARFORMAT cf;
LOGFONT lf;
memset(&cf, 0, sizeof(CHARFORMAT));
memset(&lf, 0, sizeof(LOGFONT));

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

//得到相關字體屬性
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);     //爲選定的內容設定所選字體
             else
                         SetWordCharFormat(cf);         //爲將要輸入的內容設定字體
}

在RichEdit中實現超鏈接

在RichEdit中實現超鏈接

責任編輯：admin 　 在CBuilder上製作 更新日期：2005-8-6

首先在Form上放置一個RichEdit。

在窗體的構造函數中添加以下代碼：
__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);   //自動檢測URL

     RichEdit1->Text = "歡迎訪問C++ Builder\n"
                       "網址: http://www.ccrun.com\n"
                       "偶的信箱:\n"
                       "mailto::[email protected] \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);
}

 

 

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