[分享]RichEdit控件的使用

[满衣兄]

我们在使用聊天工具的时候经常会看到消息显示为各种颜色、字体、下划线、超链接识别等效果，使用微软为我们提供的RichEdit控件就可以达到这样的效果，但是RichEdit控件使用起来并不简单，甚至于在使用的时候让我们的窗体中充斥着RichEdit的代码，下面让我们重新封装这个控件，以方面我们以后的使用。
一、效果图：

二、源码：
RichEditCtrlEx.h

/////////////////////////////////////////////////////////////////////////////
// Name:        RICHEDITCTRLEX.H
// Purpose:     CRichEditCtrlEx
// Author:      yfq
// Modified by: 
// Created:     2010/12/24 11:01
// RCS-ID:      
// Copyright:   
// Licence:     
/////////////////////////////////////////////////////////////////////////////

#ifndef __RICHEDITCTRLEX_H__
#define __RICHEDITCTRLEX_H__

class CRichEditCtrlEx :	public CRichEditCtrl
{
	DECLARE_DYNCREATE(CRichEditCtrlEx)
public:
	CRichEditCtrlEx(void);
	~CRichEditCtrlEx(void);
	
	void Initlize();
	/**
	* 最后追加一行
	*
	* @param text -[in] -要追加的文本
	*
	* @param newline -[in] -是否换行
	*
	* @param link	 -[in] -是否带超链接
	*
	* @param nLinkBegin -[in] -超链接起始位置(索引从0开始)
	*
	* @param nLinkCount -[in] -超链接字符数
	*
	* @return -[NONE]
	*/
	void Append(LPCSTR text,bool newline = false,bool link = false,int nLinkBegin = 0,int nLinkCount = 0);
	
	/**
	 * 获得文本
	 *
	 * @param nBegin -[in] -开始位置
	 *
	 * @param nEnd -[in] -结束位置
	 *
	 * @param text -[out] -得到的文本
	 *
	 * @return -[NONE]
	 */
	void GetText(int nBegin,int nEnd,CString& text);
	
	/**
	 * 新增文字时是否滚动到底部
	 *
	 * @param bottom -[in] -否滚动到底部
	 *
	 * @return -[NONE]
	 */
	void SetScrollBottom(bool bottom=true);
	void StopScroll();

	/**
	 * 设置字体
	 *
	 * @param nBegin -[in] -开始位置
	 *
	 * @param nEnd -[in] -结束位置
	 *
	 * @param bold -[in] -粗体
	 *
	 * @param italic -[in] -斜体
	 *
	 * @param underline -[in] -下划线
	 *
	 * @param color -[in] -颜色
	 *
	 * @param size -[in] -文字大小
	 *
	 * @return -[NONE]
	 */
	void SetTextFont(int nBegin,int nEnd,bool bold,bool italic,bool underline,COLORREF color=0,int size=0);
	
	/**
	 * 为选中的文本添加超链接
	 *
	 * @return -[NONE]
	 */
	void AddLink();

	/**
	 * 取消选中文本添的超链接
	 *
	 * @return -[NONE]
	 */
	void CancelLink();

	/**
	* 校验URL是否合法文件路径，依据为rfc2396
	* 这个函数只做粗略的校验，不完全符合RFC2369
	* 仅支持IPV4
	*
	*/
	BOOL CheckURL(const CString &szUrl, CString &szMsg);

	void OnSize(CWnd* pParent);
	void OnSize(CRect& rect);
	void OnSpecifySize(CWnd* pParent);
	bool IsCreate();
	void Clear();
	void SetEditFocus(bool focus);
	
	/**
	 * 显示指定颜色的边框
	 *
	 * @param bShow -[in] -是否显示边框
	 *
	 * @param nColor -[in] -边框颜色
	 *
	 * @return -[NONE]
	 */
	void ShowBorderLine(BOOL bShow,COLORREF nColor = RGB(53, 104, 187));
	
	/**
	 * 设置左侧偏移
	 *
	 * @param nOffset -[in] -偏移量
	 *
	 * @return -[NONE]
	 */
	void SetLeftOffset(int nOffset);
public:
	afx_msg void OnPaint();
	afx_msg void OnSize(UINT nType, int cx, int cy);
	afx_msg BOOL OnLink(NMHDR *in_pNotifyHeader, LRESULT *out_pResult);
	afx_msg void OnSetFocus(CWnd* pOldWnd);
	DECLARE_MESSAGE_MAP()

private:
	CWnd*		m_pParentWnd;
	bool		m_bBottom;
	BOOL		m_ShowBorder; 
	COLORREF	m_BorderColor; 
	bool		m_bCreate;
	bool		m_bFocus;
};

#endif //__RICHEDITCTRLEX_H__

[满衣兄]

RichEditCtrlEx.cpp

#include "StdAfx.h"
#include <afxinet.h>
#include "RichEditCtrlEx.h"

#pragma warning(disable:4996)

CRichEditCtrlEx::CRichEditCtrlEx(void)
{
	m_ShowBorder =	TRUE;
	m_BorderColor = RGB(53, 104, 187);
	m_bBottom = true;
	m_bCreate = false;
	m_bFocus = true;
	AfxInitRichEdit2();
}

CRichEditCtrlEx::~CRichEditCtrlEx(void)
{
}

IMPLEMENT_DYNCREATE(CRichEditCtrlEx, CRichEditCtrl)
BEGIN_MESSAGE_MAP(CRichEditCtrlEx, CRichEditCtrl)
	ON_WM_RBUTTONDOWN()
	ON_WM_LBUTTONDBLCLK()
	ON_WM_PAINT()
	ON_NOTIFY_REFLECT_EX(EN_LINK, OnLink)
	ON_WM_SETFOCUS()
END_MESSAGE_MAP()

void CRichEditCtrlEx::Initlize()
{
	m_bBottom = true;
	m_bCreate = true;
	SetEventMask(GetEventMask() | ENM_LINK) ; 
	//SendMessage(EM_AUTOURLDETECT, TRUE, 0);
	SetOptions(ECOOP_OR, ECO_AUTOVSCROLL);
	LimitText(0xFFFFFFFF);
	SetBackgroundColor(FALSE,RGB(248,248,248));
	SetLeftOffset(150);
}
void CRichEditCtrlEx::Append(LPCSTR text,bool newline,bool link,int nLinkBegin,int nLinkCount)
{
	int nPrvTotal = GetTextLengthEx( GTL_DEFAULT, 1200 );
	SetSel(-1,-1);
	ReplaceSel((LPCTSTR)text);
	if (newline)
	{
		Append("\r\n");
	}
	if (link)
	{
		if (!newline)
		{
			Append("\r\n");
		}
		int nTotal = GetTextLengthEx( GTL_DEFAULT, 1200 ) - 1;
		if( nTotal > 0)
		{
			if (nLinkCount>nTotal-nPrvTotal)
			{
				nLinkCount = nTotal-nPrvTotal;
			}
			SetSel( nPrvTotal+nLinkBegin, nPrvTotal+nLinkBegin+nLinkCount );
			AddLink();
		}
	}
	// 随着输入随着自动滚动条滚动到最后一行
	if (m_bBottom)
	{
		PostMessage(WM_VSCROLL, SB_BOTTOM,0);
	}
}
void CRichEditCtrlEx::GetText(int nBegin,int nEnd,CString& text)
{
	CHARRANGE CharRange;
	CharRange.cpMin = nBegin;
	CharRange.cpMax = nEnd;
	SetSel(CharRange);
	CHAR szTmp[1024] = {0};
	GetSelText(szTmp);
	text.Format("%s",szTmp);
}
void CRichEditCtrlEx::SetScrollBottom(bool bottom)
{
	m_bBottom = bottom;
}
void CRichEditCtrlEx::StopScroll()
{
	m_bBottom = !m_bBottom;
	if (m_bBottom)
	{
		PostMessage(WM_VSCROLL, SB_BOTTOM,0);
	}
}
void CRichEditCtrlEx::SetTextFont(int nBegin,int nEnd,bool bold,bool italic,bool underline,COLORREF color,int size)
{
	SetSel(nBegin,nEnd);
	CHARFORMAT2 cf,oldCf;
	GetSelectionCharFormat(oldCf);
	GetSelectionCharFormat(cf);
	if (bold)
	{
		cf.dwMask|=CFM_BOLD;
		cf.dwEffects|=CFE_BOLD;			//设置粗体，取消用cf.dwEffects&=~CFE_BOLD;
	}
	if (italic)
	{
		cf.dwMask|=CFM_ITALIC;
		cf.dwEffects|=CFE_ITALIC;		//设置斜体，取消用cf.dwEffects&=~CFE_ITALIC;
	}
	if (underline)
	{
		cf.dwMask|=CFM_UNDERLINE;
		cf.dwEffects|=CFE_UNDERLINE;	//设置下划线，取消用cf.dwEffects&=~CFE_UNDERLINE;
	}
	if (color)
	{
		cf.dwEffects &= ~CFE_AUTOCOLOR;	//这个最重要，设选中文字颜色的时候也要注意,dwEffects一定不能有CEF_AUTOCOLOR的属性
		cf.dwMask|=CFM_COLOR;
		cf.crTextColor = color;	//设置颜色
	}
	if (size)
	{
		cf.dwMask|=CFM_SIZE;
		cf.yHeight =200;				//设置高度
	}
	cf.dwMask|=CFM_FACE;
	strcpy(cf.szFaceName ,_T("宋体"));//设置字体
	SetSelectionCharFormat(cf);
	SetSel(-1,-1);
	SetSelectionCharFormat(oldCf);
}
void CRichEditCtrlEx::AddLink()
{
	CHARFORMAT2 cf2;
	ZeroMemory(&cf2, sizeof(CHARFORMAT2));
	cf2.cbSize = sizeof(CHARFORMAT2);

	cf2.dwMask |= CFM_LINK;
	cf2.dwEffects |= CFE_LINK;

	cf2.dwEffects &= ~CFE_AUTOCOLOR;	//这个最重要，设选中文字颜色的时候也要注意,dwEffects一定不能有CEF_AUTOCOLOR的属性
	cf2.dwMask |= CFM_COLOR;
	cf2.crTextColor = RGB( 255, 112, 5 );

	SetSelectionCharFormat(cf2);
	SetSel( -1, -1 );
}

void CRichEditCtrlEx::CancelLink()
{
	CHARFORMAT2 cf2;
	ZeroMemory(&cf2, sizeof(CHARFORMAT2));
	cf2.cbSize = sizeof(CHARFORMAT2);
	cf2.dwMask = CFM_LINK;
	cf2.dwEffects &= ~CFE_LINK;

	SendMessage(EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&cf2);
	SetSel( -1, -1 );
}
BOOL CRichEditCtrlEx::CheckURL(const CString &szUrl, CString &szMsg)
{
	DWORD dwService = 0;
	DWORD dwValid = AFX_INET_SERVICE_FTP|AFX_INET_SERVICE_HTTP|AFX_INET_SERVICE_HTTPS|AFX_INET_SERVICE_FILE;
	CString strServer;  
	CString strObject;  
	INTERNET_PORT port; 

	BOOL bValid = AfxParseURL(szUrl, dwService, strServer, strObject, port);  
	if (!bValid)
	{ 
		szMsg = szUrl + " \n不是一个合法的下载地址URL";
		return FALSE;  
	}
	return TRUE;
}
BOOL CRichEditCtrlEx::OnLink(NMHDR *pNotifyHeader, LRESULT *pResult)
{
	ENLINK *pEnLink = reinterpret_cast<ENLINK *>(pNotifyHeader);
	CString	  strURL;
	*pResult = 0;
	CHAR szTmpLink[512] = {0};
	switch (pNotifyHeader->code)
	{
	case EN_LINK:
		switch (pEnLink->msg)
		{
		case WM_LBUTTONUP:
			SetSel(pEnLink->chrg);
			GetSelText(szTmpLink);
			strURL.Format("%s",szTmpLink);
			CString strMsg;
			if (CheckURL(strURL,strMsg))
			{
				ShellExecute(GetSafeHwnd(), _T("open"), strURL, NULL, NULL, SW_SHOWNORMAL);
			}
			break;
		}
		break;
	}
	return *pResult;
}

//	We need to handle the OnSize message to ensure that the most recent
//	line of text is visible.
void CRichEditCtrlEx::OnSize(UINT nType, int cx, int cy)
{
	CRichEditCtrl::OnSize(nType, cx, cy);
}
void CRichEditCtrlEx::OnSize(CWnd* pParent)
{
	if (!m_bCreate)
	{
		return;
	}
	CRect parentRect;
	pParent->GetClientRect(parentRect);
	parentRect.bottom = parentRect.bottom - 5;
	parentRect.top = parentRect.top + 5;
	parentRect.left = parentRect.left + 5;
	parentRect.right = parentRect.right - 5;
	MoveWindow(parentRect,TRUE);
}
void CRichEditCtrlEx::OnSize(CRect& rect)
{
	if (!m_bCreate)
	{
		return;
	}
	rect.bottom = rect.bottom - 5;
	rect.top = rect.top + 5;
	rect.left = rect.left + 5;
	rect.right = rect.right - 5;
	MoveWindow(rect,TRUE);
}
void CRichEditCtrlEx::OnSpecifySize(CWnd* pParent)
{
	if (!m_bCreate)
	{
		return;
	}
	CRect parentRect;
	pParent->GetClientRect(parentRect);
	parentRect.left = 5;
	parentRect.top = 197;
	parentRect.right -= 5;
	parentRect.bottom -= 5;
	MoveWindow(parentRect,TRUE);

}
void CRichEditCtrlEx::OnPaint()
{
	if (!m_ShowBorder)
	{
		CRichEditCtrl::OnPaint();
		return;
	}
	CRichEditCtrl::OnPaint();
	CClientDC dc(this);
	if (!m_pParentWnd)
	{
		return;
	}
	CRect rect;
	GetWindowRect(rect);
	rect.left-=1;
	rect.top-=1;
	rect.right+=1;
	rect.bottom+=1;
	ScreenToClient(rect);
	dc.Draw3dRect(rect,m_BorderColor,m_BorderColor);
}
// 如果控件可以获得焦点，则当控件有焦点时会自动滚动到底部，所以要屏蔽一下
void CRichEditCtrlEx::OnSetFocus(CWnd* pOldWnd)
{
	if (!m_bFocus)
	{
		return;
	}
	CRichEditCtrl::OnSetFocus(pOldWnd);
}

bool CRichEditCtrlEx::IsCreate()
{
	return m_bCreate;
}
void CRichEditCtrlEx::Clear()
{
	if (GetWindowLong(this->m_hWnd,GWL_STYLE) & ES_READONLY)
	{
		SetReadOnly(FALSE);
		CRichEditCtrl::Clear();
		SetReadOnly();
	}
	else
	{
		CRichEditCtrl::Clear();
	}
}
void CRichEditCtrlEx::SetEditFocus(bool focus)
{
	m_bFocus = focus;
}
void CRichEditCtrlEx::ShowBorderLine(BOOL bShow,COLORREF nColor)
{
	m_ShowBorder = bShow;
}
void CRichEditCtrlEx::SetLeftOffset(int nOffset)
{
	PARAFORMAT2 PF_his;
	PF_his.dwMask = PFM_ALIGNMENT|PFM_STARTINDENT;
	PF_his.wAlignment = PFA_LEFT;
	PF_his.dxStartIndent = nOffset;
	SetParaFormat(PF_his);
}
#pragma warning(default:4996)

三、使用方法
1、在窗体上放一个Rich Edit 2.0 Control,修改属性，例如，你需要多行显示则要把Multiline属性设置为TRUE，如果需要垂直滚动条则需要把Vertical Scroll属性设置为TRUE
2、为新添加的RichEdit控件关联控件变量：
在头文件中声明CRichEditCtrlEx m_RichEdit;
在DoDataExchange中写入DDX_Control(pDX, IDC_RICHEDIT21, m_RichEdit);

[满衣兄]

3、初始化控件
在窗体的OnInitDialog()中添加代码：m_RichEdit.Initlize();
4、其它函数的使用见代码注释

本文来源：http://www.looiy.com/?p=74

[ilyyangminglong1]

谢谢分享

[不二星空]

RichEdit 好像很难。。。

[Eleven]

[__lhy]

多谢分享

[x2010072710]

分享一下

[warrior1]

楼主真的试过链接也能设置颜色？！
请不要想当然，你去试一下就知道你的代码对不对了！！！！！

[暮色已沉]

正好在找这种自己重新写的新控件类的用法，谢谢~！