多行文本框的应用。可以修改字体型号，字体颜色，行间距

//---------------------------------------实例化--------------------------------------------

iREdit1.SetRect(TPoint(50, 50), TSize(260, 200));
iEdit1 = new (ELeave) CMyEdwin;
iEdit1->SetContainerWindowL(*this);

TResourceReader reader;
iEikonEnv->CreateResourceReaderLC(reader, R_UTFJJWVX_CONTAINER_EDIT1);
iEdit1->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy(); // reader internal state
iEdit1->SetFocus(ETrue);
//--------修改字体型号、颜色--------
//CFont* sFont = (CFont*) CEikonEnv::Static()->DenseFont();
CFont* sFont = (CFont*) LatinBold16();

TFontSpec sFontSpec = sFont->FontSpecInTwips();

TCharFormat format;
Mem::FillZ(&format, sizeof(TCharFormat));

TCharFormatMask mask;
Mem::FillZ(&mask, sizeof(TCharFormatMask));

format.iFontSpec.iTypeface = sFontSpec.iTypeface;
TInt nHeight = sFontSpec.iHeight;
format.iFontSpec.iHeight = sFontSpec.iHeight;
format.iFontPresentation.iTextColor = TLogicalRgb(TRgb(238, 84, 0)); //修改字体颜色
mask.SetAttrib(EAttColor);
mask.SetAttrib(EAttFontTypeface);
mask.SetAttrib(EAttFontHeight);

CCharFormatLayer * layer = CCharFormatLayer::NewL(format, mask);

iEdit1->SelectAllL();
iEdit1->SetCharFormatLayer(layer);
//--------修改多行文本框的行间距--------
TParaFormatMask mask2;
mask2.SetAll();
CParaFormat* iFormat = CParaFormat::NewL();
iFormat->iLineSpacingInTwips = 20;
CParaFormatLayer * iFormatLayer = CParaFormatLayer::NewL(iFormat, mask2);
iEdit1->SetParaFormatLayer(iFormatLayer);
//-------------------------------------

iEdit1->SetRect(iREdit1);

//---------------------------------------头文件-------------------------------------------

#ifndef MYEDWIN_H
#define MYEDWIN_H

// INCLUDES
#include <EIKRTED.H>

// CLASS DECLARATION
class CMyEdwin : public CEikRichTextEditor
{
protected:
CLafEdwinCustomDrawBase* CreateCustomDrawL();
};

#endif

//---------------------------------------定义文件-------------------------------------------

// INCLUDE FILES
#include <eikenv.h>
#include "MyEdwin.h"

// =================== CUSTOM DRAW =========================
class CMyCustomDraw : public CLafEdwinCustomDrawBase
{
public:
static CMyCustomDraw
* NewL(const MLafEnv& aEnv, const CCoeControl& aControl);
~CMyCustomDraw();

public:
// from MFormCustomDraw
void DrawBackground(const TParam& aParam, const TRgb& aBackground,
TRect& aDrawn) const;
TRgb SystemColor(TUint aColorIndex, TRgb aDefaultColor) const;

public:
void LineSpacingChanged();

private:
CMyCustomDraw(const MLafEnv& aEnv, const CCoeControl& aControl);
void ConstructL();

private:
CFbsBitmap* iBitmap;
};

CMyCustomDraw* CMyCustomDraw::NewL(const MLafEnv& aEnv,
const CCoeControl& aControl)
{
CMyCustomDraw* self = new (ELeave) CMyCustomDraw(aEnv, aControl);
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop(self);
return self;
}

CMyCustomDraw::~CMyCustomDraw()
{
if (iBitmap)
{
delete iBitmap;
iBitmap = NULL;
}
}

void CMyCustomDraw::DrawBackground(const TParam& aParam,
const TRgb& aBackground, TRect& aDrawn) const
{

CLafEdwinCustomDrawBase::DrawBackground(aParam, aBackground, aDrawn);

/*
if ((iBitmap != NULL) && (iBitmap->Handle() != 0))
{
TRect rect = TRect(TPoint(0, 0), iBitmap->SizeInPixels());
aParam.iGc.SetClippingRect(aParam.iDrawRect);
aParam.iGc.DrawBitmap(rect, iBitmap);
}
*/

}

TRgb CMyCustomDraw::SystemColor(TUint aColorIndex, TRgb aDefaultColor) const
{
return CLafEdwinCustomDrawBase::SystemColor(aColorIndex, aDefaultColor);
}

void CMyCustomDraw::LineSpacingChanged()
{
CLafEdwinCustomDrawBase::LineSpacingChanged();
}

CMyCustomDraw::CMyCustomDraw(const MLafEnv& aEnv, const CCoeControl& aControl) :
CLafEdwinCustomDrawBase(aEnv, aControl)
{
}

void CMyCustomDraw::ConstructL()
{
/*
#ifdef _DEBUG
_LIT(KMbmFile, "z://resource//apps//Utfjjwvx.mbm");
#else
_LIT(KMbmFile, "c://resource//apps//Utfjjwvx.mbm");
#endif
iBitmap = new (ELeave) CFbsBitmap;
TInt err = iBitmap->Load(KMbmFile, );
User::LeaveIfError(err);
*/
iBitmap = NULL;
}

// ================= MEMBER FUNCTIONS =======================
CLafEdwinCustomDrawBase* CMyEdwin::CreateCustomDrawL()
{
return CMyCustomDraw::NewL(iEikonEnv->LafEnv(), *this);
}