CRichEditCtrl 控件背景透明

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);

}



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();

	float fScaleTP = 1440.0f/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()

	if (m_bOwenDraw)

	{

		CDC* pDC = GetDC();

		CRect rtWindow;

		GetWindowRect(rtWindow);

		int xBorder = GetSystemMetrics(SM_CXSIZEFRAME);

		int yBorder = GetSystemMetrics(SM_CYSIZEFRAME);

		ScreenToClient(rtWindow);

		CPen pen(PS_DOT, 0, RGB(0,0,0));

		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);

		return;

	}

	CRichEditCtrl::OnNcPaint();

}



int CAutoRichEditCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct)

{

	if (CRichEditCtrl::OnCreate(lpCreateStruct) == -1)

		return -1;



	if (m_bOwenDraw)

	{

		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;

}

// AutoRichEditCtrl.cpp : implementation file

//



#include "stdafx.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



/////////////////////////////////////////////////////////////////////////////

// CAutoRichEditCtrl



CAutoRichEditCtrl::CAutoRichEditCtrl()

: m_bOwenDraw(FALSE)

{

}



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 handlers



CString 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);

}

#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 window



class CAutoRichEditCtrl : public CRichEditCtrl

{

// Construction

public:

	CAutoRichEditCtrl();



// Attributes

public:

	BOOL m_bOwenDraw;



// 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_)