求助:CRichEditCtrl编辑框 如何设置背景色透明度呢

Question

 我动态创建了一个CRichEditCtrl编辑框,请问高手一下,如何才能让动态创建的这个边际框背景色透明呢?
 Help!!!

Answer 1

刚做完这个功能。
从CRichEditCtrl派生一个类
在其OnCreate中
SetWindowLong(m_hWnd, GWL_EXSTYLE, GetWindowLong(m_hWnd,GWL_EXSTYLE)|WS_EX_TRANSPARENT); 
边框自绘
void CMYRichEditCtrl::OnNcPaint()
{
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CRichEditCtrl::OnNcPaint()
CDC* pDC = GetDC();
CRect rtWindow;
GetWindowRect(rtWindow);
int xBorder = GetSystemMetrics(SM_CXSIZEFRAME);
int yBorder = GetSystemMetrics(SM_CYSIZEFRAME);
ScreenToClient(rtWindow);
CPen pen(PS_DASH, 0, RGB(0,116,255));
CPen* pOldpen = pDC->SelectObject(&pen);
CGdiObject* pOld = pDC->SelectStockObject(NULL_BRUSH);
pDC->Rectangle(rtWindow);
rtWindow.DeflateRect(xBorder-2, yBorder-2);
pDC->Rectangle(rtWindow);
pDC->SelectObject(pOld);
pDC->SelectObject(pOldpen);
ReleaseDC(pDC);
}

Answer 2

或者你不派生也可以在控件Create以后
调用其SetWindowLong也可以
比如CRichEditCtrl wndRich;wndRich.Create(...);::SetWindowLong(wndRich.GetSafeHwnd(),GWL_EXSTYLE, ::GetWindowLong(wndRich.GetSafeHwnd(),GWL_EXSTYLE)|WS_EX_TRANSPARENT); 

Answer 3

感谢 jcily!
不过我用了你的那个边框自绘,在视图窗口中只是闪烁了一下就没有了,请问这是为什么?

Answer 4

#if !defined(AFX_AUTORICHEDITCTRL_H__C26D1E0E_DD32_11D2_B39F_000092914562__INCLUDED_)
#define AFX_AUTORICHEDITCTRL_H__C26D1E0E_DD32_11D2_B39F_000092914562__INCLUDED_#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// AutoRichEditCtrl.h : header file
///////////////////////////////////////////////////////////////////////////////
// CAutoRichEditCtrl windowclass CAutoRichEditCtrl : public CRichEditCtrl
{
// Construction
public:
CAutoRichEditCtrl();// Attributes
public:// Operations
public:// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAutoRichEditCtrl)
//}}AFX_VIRTUAL// Implementation
public:
long GetSelectionFontSize();
CString GetSelectionFontName();
CStringArray m_saFontList;
void GetSystemFonts(CStringArray &saFontList);
void SetFontSize(int nPointSize);
void SetFontName(CString sFontName);
void SelectColor();
bool ParagraphIsBulleted();
void SetParagraphBulleted();

PARAFORMAT GetParagraphFormat();

bool ParagraphIsRight();
bool ParagraphIsLeft();
bool ParagraphIsCentered();

void SetParagraphRight();
void SetParagraphLeft();
void SetParagraphCenter();

CHARFORMAT GetCharFormat(DWORD dwMask = CFM_COLOR | CFM_FACE | CFM_SIZE | CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE);

bool SelectionIsBold();
bool SelectionIsItalic();
bool SelectionIsUnderlined(); void SetSelectionBold();
void SetSelectionItalic();
void SetSelectionUnderlined(); void SetRTF(CString sRTF);
CString GetRTF();
virtual ~CAutoRichEditCtrl(); // Generated message map functions
protected:
afx_msg void OnRButtonDown(UINT nFlags, CPoint point); DECLARE_MESSAGE_MAP()
private:
void SetCharStyle(int MASK, int STYLE, int nStart, int nEnd);
static DWORD CALLBACK CBStreamIn(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb);
static DWORD CALLBACK CBStreamOut(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG* pcb);
static BOOL CALLBACK CBEnumFonts(LPLOGFONT lplf, LPTEXTMETRIC lptm, DWORD dwType, LPARAM lpData);
public:
afx_msg void OnCopy() { Copy(); }
afx_msg void OnCut() { Cut(); }
afx_msg void OnPaste() { Paste(); }
afx_msg void OnSelectall() { SetSel(0, -1); }
afx_msg void OnUndo() { Undo(); }
afx_msg void OnClear() { Clear(); }
afx_msg void OnEnRequestresize(NMHDR *pNMHDR, LRESULT *pResult);
afx_msg HBRUSH CtlColor(CDC* /*pDC*/, UINT /*nCtlColor*/);
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
afx_msg void OnNcPaint();
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnEnUpdate();
};///////////////////////////////////////////////////////////////////////////////{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_AUTORICHEDITCTRL_H__C26D1E0E_DD32_11D2_B39F_000092914562__INCLUDED_)

Answer 5

// AutoRichEditCtrl.cpp : implementation file
//#include "stdafx.h"
//#include "RichEd.h"
#include "AutoRichEditCtrl.h"
#include ".\autoricheditctrl.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif#define ID_RICH_UNDO                    101
#define ID_RICH_CUT                     102
#define ID_RICH_COPY                    103
#define ID_RICH_PASTE                   104
#define ID_RICH_CLEAR                   105
#define ID_RICH_SELECTALL               106
//#define ID_RICH_SETFONT                 107/////////////////////////////////////////////////////////////////////////////
// CAutoRichEditCtrlCAutoRichEditCtrl::CAutoRichEditCtrl()
{
}CAutoRichEditCtrl::~CAutoRichEditCtrl()
{
}
BEGIN_MESSAGE_MAP(CAutoRichEditCtrl, CRichEditCtrl)
//{{AFX_MSG_MAP(CAutoRichEditCtrl)
ON_WM_RBUTTONDOWN()
ON_COMMAND(ID_RICH_COPY, OnCopy)
ON_COMMAND(ID_RICH_CUT, OnCut)
ON_COMMAND(ID_RICH_PASTE, OnPaste)
ON_COMMAND(ID_RICH_SELECTALL, OnSelectall)
ON_COMMAND(ID_RICH_UNDO, OnUndo)
ON_COMMAND(ID_RICH_CLEAR, OnClear)
//}}AFX_MSG_MAP
ON_NOTIFY_REFLECT(EN_REQUESTRESIZE, OnEnRequestresize)
ON_WM_CTLCOLOR_REFLECT()
ON_WM_ERASEBKGND()
ON_WM_CTLCOLOR()
ON_WM_NCPAINT()
ON_WM_CREATE()
ON_CONTROL_REFLECT(EN_UPDATE, OnEnUpdate)
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CAutoRichEditCtrl message handlersCString CAutoRichEditCtrl::GetRTF()
{
// Return the RTF string of the text in the control.

// Stream out here.
EDITSTREAM es;
es.dwError = 0;
es.pfnCallback = CBStreamOut; // Set the callback CString sRTF = ""; es.dwCookie = (DWORD) &sRTF; // so sRTF receives the string

StreamOut(SF_RTF, es); // Call CRichEditCtrl::StreamOut to get the string.
/// return sRTF;}void CAutoRichEditCtrl::SetRTF(CString sRTF)
{
// Put the RTF string sRTF into the rich edit control. // Read the text in
EDITSTREAM es;
es.dwError = 0;
es.pfnCallback = CBStreamIn;
es.dwCookie = (DWORD) &sRTF;
StreamIn(SF_RTF, es); // Do it.

}/*
Callback function to stream an RTF string into the rich edit control.
*/
DWORD CALLBACK CAutoRichEditCtrl::CBStreamIn(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
// We insert the rich text here./*
This function taken from CodeGuru.com
http://www.codeguru.com/richedit/rtf_string_streamin.shtml
Zafir Anjum
*/ CString *pstr = (CString *) dwCookie; if (pstr->GetLength() < cb)
{
*pcb = pstr->GetLength();
memcpy(pbBuff, (LPCSTR) *pstr, *pcb);
pstr->Empty();
}
else
{
*pcb = cb;
memcpy(pbBuff, (LPCSTR) *pstr, *pcb);
*pstr = pstr->Right(pstr->GetLength() - cb);
}
/// return 0;
}/*
Callback function to stream the RTF string out of the rich edit control.
*/
DWORD CALLBACK CAutoRichEditCtrl::CBStreamOut(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
// Address of our string var is in psEntry
CString *psEntry = (CString*) dwCookie;
CString tmpEntry = "";
tmpEntry = (CString) pbBuff; // And write it!!!
*psEntry += tmpEntry.Left(cb); return 0;
}bool CAutoRichEditCtrl::SelectionIsBold()
{
CHARFORMAT cf = GetCharFormat();

if (cf.dwEffects & CFM_BOLD)
return true;
else
return false;
}bool CAutoRichEditCtrl::SelectionIsItalic()
{
CHARFORMAT cf = GetCharFormat();

if (cf.dwEffects & CFM_ITALIC)
return true;
else
return false;
}bool CAutoRichEditCtrl::SelectionIsUnderlined()
{
CHARFORMAT cf = GetCharFormat();

if (cf.dwEffects & CFM_UNDERLINE)
return true;
else
return false;
}CHARFORMAT CAutoRichEditCtrl::GetCharFormat(DWORD dwMask)
{
CHARFORMAT cf;
cf.cbSize = sizeof(CHARFORMAT); cf.dwMask = dwMask; GetSelectionCharFormat(cf); return cf;
}void CAutoRichEditCtrl::SetCharStyle(int MASK, int STYLE, int nStart, int nEnd)
{
CHARFORMAT cf;
cf.cbSize = sizeof(CHARFORMAT);
//cf.dwMask = MASK;

GetSelectionCharFormat(cf);

if (cf.dwMask & MASK) // selection is all the same
{
cf.dwEffects ^= STYLE; 
}
else
{
cf.dwEffects |= STYLE;
}

cf.dwMask = MASK; SetSelectionCharFormat(cf);}void CAutoRichEditCtrl::SetSelectionBold()
{
long start=0, end=0;
GetSel(start, end); // Get the current selection SetCharStyle(CFM_BOLD, CFE_BOLD, start, end); // Make it bold
}void CAutoRichEditCtrl::SetSelectionItalic()
{
long start=0, end=0;
GetSel(start, end); SetCharStyle(CFM_ITALIC, CFE_ITALIC, start, end);
}void CAutoRichEditCtrl::SetSelectionUnderlined()
{
long start=0, end=0;
GetSel(start, end); SetCharStyle(CFM_UNDERLINE, CFE_UNDERLINE, start, end);
}void CAutoRichEditCtrl::SetParagraphCenter()
{
PARAFORMAT paraFormat;    
paraFormat.cbSize = sizeof(PARAFORMAT);
paraFormat.dwMask = PFM_ALIGNMENT;    
paraFormat.wAlignment = PFA_CENTER;

SetParaFormat(paraFormat); // Set the paragraph.
}void CAutoRichEditCtrl::SetParagraphLeft()
{
PARAFORMAT paraFormat;
paraFormat.cbSize = sizeof(PARAFORMAT);
paraFormat.dwMask = PFM_ALIGNMENT;    
paraFormat.wAlignment = PFA_LEFT;

SetParaFormat(paraFormat);
}void CAutoRichEditCtrl::SetParagraphRight()
{
PARAFORMAT paraFormat;
paraFormat.cbSize = sizeof(PARAFORMAT);
paraFormat.dwMask = PFM_ALIGNMENT;    
paraFormat.wAlignment = PFA_RIGHT;

SetParaFormat(paraFormat);
}bool CAutoRichEditCtrl::ParagraphIsCentered()
{
PARAFORMAT pf = GetParagraphFormat(); if (pf.wAlignment == PFA_CENTER)
return true;
else
return false;
}bool CAutoRichEditCtrl::ParagraphIsLeft()
{
PARAFORMAT pf = GetParagraphFormat(); if (pf.wAlignment == PFA_LEFT)
return true;
else
return false;
}bool CAutoRichEditCtrl::ParagraphIsRight()
{
PARAFORMAT pf = GetParagraphFormat(); if (pf.wAlignment == PFA_RIGHT)
return true;
else
return false;
}PARAFORMAT CAutoRichEditCtrl::GetParagraphFormat()
{
PARAFORMAT pf;
pf.cbSize = sizeof(PARAFORMAT); pf.dwMask = PFM_ALIGNMENT | PFM_NUMBERING;     GetParaFormat(pf); return pf;
}void CAutoRichEditCtrl::SetParagraphBulleted()
{
PARAFORMAT paraformat = GetParagraphFormat(); if ( (paraformat.dwMask & PFM_NUMBERING) && (paraformat.wNumbering == PFN_BULLET) )
{
paraformat.wNumbering = 0;
paraformat.dxOffset = 0;
paraformat.dxStartIndent = 0;
paraformat.dwMask = PFM_NUMBERING | PFM_STARTINDENT | PFM_OFFSET;
}
else
{
paraformat.wNumbering = PFN_BULLET;
paraformat.dwMask = PFM_NUMBERING;
if (paraformat.dxOffset == 0)
{
paraformat.dxOffset = 4;
paraformat.dwMask = PFM_NUMBERING | PFM_STARTINDENT | PFM_OFFSET;
}
}

SetParaFormat(paraformat);}bool CAutoRichEditCtrl::ParagraphIsBulleted()
{
PARAFORMAT pf = GetParagraphFormat(); if (pf.wNumbering == PFN_BULLET)
return true;
else
return false;
}void CAutoRichEditCtrl::SelectColor()
{
CColorDialog dlg; CHARFORMAT cf = GetCharFormat(); if (cf.dwEffects & CFE_AUTOCOLOR) cf.dwEffects -= CFE_AUTOCOLOR; // Get a color from the common color dialog.
if( dlg.DoModal() == IDOK )
{
cf.crTextColor = dlg.GetColor();
} cf.dwMask = CFM_COLOR; SetSelectionCharFormat(cf);
}

Answer 6

void CAutoRichEditCtrl::SetFontName(CString sFontName)
{
CHARFORMAT cf = GetCharFormat(); // Set the font name.
for (int i = 0; i <= sFontName.GetLength()-1; i++)
cf.szFaceName[i] = sFontName[i];
cf.dwMask = CFM_FACE; SetSelectionCharFormat(cf);
}void CAutoRichEditCtrl::SetFontSize(int nPointSize)
{
CHARFORMAT cf = GetCharFormat(); nPointSize *= 20; // convert from to twips
cf.yHeight = nPointSize;

cf.dwMask = CFM_SIZE; SetSelectionCharFormat(cf);
}void CAutoRichEditCtrl::GetSystemFonts(CStringArray &saFontList)
{
CDC *pDC = GetDC (); EnumFonts (pDC->GetSafeHdc(),NULL,(FONTENUMPROC) CBEnumFonts,(LPARAM)&saFontList);//Enumerate}BOOL CALLBACK CAutoRichEditCtrl::CBEnumFonts(LPLOGFONT lplf, LPTEXTMETRIC lptm, DWORD dwType, LPARAM lpData)
{
// This function was written with the help of CCustComboBox, by Girish Bharadwaj.
// Available from Codeguru. if (dwType == TRUETYPE_FONTTYPE) 
{
((CStringArray *) lpData)->Add( lplf->lfFaceName );
} return true;
}CString CAutoRichEditCtrl::GetSelectionFontName()
{
CHARFORMAT cf = GetCharFormat(); CString sName = cf.szFaceName; return sName;
}long CAutoRichEditCtrl::GetSelectionFontSize()
{
CHARFORMAT cf = GetCharFormat();
double fScaleTP = 1440.0/GetDeviceCaps(GetDC()->GetSafeHdc(), LOGPIXELSY);
long nSize = cf.yHeight/fScaleTP; return nSize;
}void CAutoRichEditCtrl::OnRButtonDown( UINT nFlags, CPoint point )
{
//设置为焦点
SetFocus();
//创建一个弹出式菜单
CMenu popmenu;
popmenu.CreatePopupMenu();
//添加菜单项目
popmenu.AppendMenu(0, ID_RICH_UNDO, _T("撤销(&U)"));
popmenu.AppendMenu(0, MF_SEPARATOR);
popmenu.AppendMenu(0, ID_RICH_CUT, _T("剪切(&T)"));
popmenu.AppendMenu(0, ID_RICH_COPY, _T("复制(&C)"));
popmenu.AppendMenu(0, ID_RICH_PASTE, _T("粘贴(&P)"));
popmenu.AppendMenu(0, ID_RICH_CLEAR, _T("删除(&L)"));
popmenu.AppendMenu(0, MF_SEPARATOR);
popmenu.AppendMenu(0, ID_RICH_SELECTALL, _T("全选(&A)"));
//popmenu.AppendMenu(0, MF_SEPARATOR);
//popmenu.AppendMenu(0, ID_RICH_SETFONT, "Select &Font"); //初始化菜单项
UINT nUndo=(CanUndo() ? 0 : MF_GRAYED );
popmenu.EnableMenuItem(ID_RICH_UNDO, MF_BYCOMMAND|nUndo); UINT nSel=((GetSelectionType()!=SEL_EMPTY) ? 0 : MF_GRAYED) ;
popmenu.EnableMenuItem(ID_RICH_CUT, MF_BYCOMMAND|nSel);
popmenu.EnableMenuItem(ID_RICH_COPY, MF_BYCOMMAND|nSel);
popmenu.EnableMenuItem(ID_RICH_CLEAR, MF_BYCOMMAND|nSel); UINT nPaste=(CanPaste() ? 0 : MF_GRAYED) ;
popmenu.EnableMenuItem(ID_RICH_PASTE, MF_BYCOMMAND|nPaste); //显示菜单
CPoint pt;
GetCursorPos(&pt);
popmenu.TrackPopupMenu(TPM_RIGHTBUTTON, pt.x, pt.y, this);
popmenu.DestroyMenu();
CRichEditCtrl::OnRButtonDown(nFlags, point);
}
HBRUSH CAutoRichEditCtrl::CtlColor(CDC* pDC, UINT /*nCtlColor*/)
{
// TODO:  在此更改 DC 的任何属性 pDC->SetBkMode(TRANSPARENT);
return NULL;
}BOOL CAutoRichEditCtrl::OnEraseBkgnd(CDC* pDC)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
//CRect rt;
//GetClientRect(rt);
//pDC->FillSolidRect(rt,RGB(0,255,0));
//pDC->MoveTo(rt.TopLeft());
//pDC->LineTo(rt.BottomRight());
return CRichEditCtrl::OnEraseBkgnd(pDC);
return FALSE;
}HBRUSH CAutoRichEditCtrl::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CRichEditCtrl::OnCtlColor(pDC, pWnd, nCtlColor); // TODO:  在此更改 DC 的任何属性 // TODO:  如果默认的不是所需画笔，则返回另一个画笔
return hbr;
}void CAutoRichEditCtrl::OnNcPaint()
{
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CRichEditCtrl::OnNcPaint()
CDC* pDC = GetDC();
CRect rtWindow;
GetWindowRect(rtWindow);
int xBorder = GetSystemMetrics(SM_CXSIZEFRAME);
int yBorder = GetSystemMetrics(SM_CYSIZEFRAME);
ScreenToClient(rtWindow);
CPen pen(PS_DASH, 0, RGB(0,116,255));
CPen* pOldpen = pDC->SelectObject(&pen);
CGdiObject* pOld = pDC->SelectStockObject(NULL_BRUSH);
pDC->Rectangle(rtWindow);
rtWindow.DeflateRect(xBorder-2, yBorder-2);
pDC->Rectangle(rtWindow);
pDC->SelectObject(pOld);
pDC->SelectObject(pOldpen);
ReleaseDC(pDC);
}int CAutoRichEditCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CRichEditCtrl::OnCreate(lpCreateStruct) == -1)
return -1; SetWindowLong(m_hWnd, GWL_EXSTYLE, GetWindowLong(m_hWnd,GWL_EXSTYLE)|WS_EX_TRANSPARENT);  return 0;
}void CAutoRichEditCtrl::OnEnUpdate()
{
// TODO:  如果该控件是 RICHEDIT 控件，则它将不会
// 发送该通知，除非重写 CRichEditCtrl::OnInitDialog()
// 函数，将 EM_SETEVENTMASK 消息发送到控件，
// 同时将 ENM_UPDATE 标志“或”运算到 lParam 掩码中。 // TODO:  在此添加控件通知处理程序代码
}// 根据文本改变编辑框大小
void CAutoRichEditCtrl::OnEnRequestresize(NMHDR *pNMHDR, LRESULT *pResult)
{
REQRESIZE *pReqResize = reinterpret_cast<REQRESIZE *>(pNMHDR);
// TODO:  控件将不发送该通知，除非您重写
// CRichEditCtrl::OnInitDialog() 函数以发送 EM_SETEVENTMASK 消息
// 到具有 ENM_REQUESTRESIZE 标志“或”运算到 lParam 掩码中的控件。 // 根据文本改变编辑框大小
CRect rtEditBox;
GetWindowRect(rtEditBox);
rtEditBox.NormalizeRect();
RECT rtNew = pReqResize->rc;
GetParent()->ScreenToClient( rtEditBox );
rtEditBox.NormalizeRect();
if (rtEditBox.Height() < (rtNew.bottom +2*GetSystemMetrics(SM_CYSIZEFRAME) - rtNew.top) )
rtEditBox.bottom = rtNew.bottom + 2*GetSystemMetrics(SM_CYSIZEFRAME);
MoveWindow(rtEditBox); *pResult = 1;
}