自定义的symbian图片控件，可在任意的位置放图片（转）

首先给出这个控件类：

头文件：

#ifndef CMyPicture_H
#define CMyPicture_H

// INCLUDES
#include <e32std.h>
#include <e32base.h>
#include <f32file.h>
#include <fbs.h>
#include <coecntrl.h>

// CLASS DECLARATION

//class RFs;
class CMyPicture : public CCoeControl
{
public: // Constructors and destructor

/**
* Destructor.
*/
~CMyPicture();

/**
* Two-phased constructor.
*/
static CMyPicture* NewL();

/**
* Two-phased constructor.
*/
static CMyPicture* NewLC();

public:

/**
* Constructor for performing 1st stage construction
*/
CMyPicture();

/**
* EPOC default constructor for performing 2nd stage construction
*/
void ConstructL();

virtual void Draw(const TRect& aRect) const;
void SetPicture(TDesC& aFilePath);
void SetVisiable(TBool aVisiable);
void GetPng(RFs& aFs,const TDesC& afilepath,CFbsBitmap* iBitmap,CFbsBitmap* iBmpMask );
private:
TBuf<100> iFilePath;
RFs fs;
CFbsBitmap* iBitmapBack;
CFbsBitmap* iBitmapBackMask;
TBool iBVisiable;

};

#endif // CMyPicture_H

然后是cpp文件：

#include "CMyPicture.h"
#include <eikenv.h>
#include <ImageConversion.h>

CMyPicture::CMyPicture()
{
// No implementation required
}

CMyPicture::~CMyPicture()
{
}

CMyPicture* CMyPicture::NewLC()
{
CMyPicture* self = new (ELeave)CMyPicture();
CleanupStack::PushL(self);
self->ConstructL();
return self;
}

CMyPicture* CMyPicture::NewL()
{
CMyPicture* self=CMyPicture::NewLC();
CleanupStack::Pop(); // self;
return self;
}

void CMyPicture::ConstructL()
{

CreateWindowL();
fs=iEikonEnv->FsSession();
iBitmapBack=new (ELeave) CFbsBitmap();
iBitmapBackMask=new (ELeave) CFbsBitmap();
_LIT(KBackPath,"c:\\system\\apps\\SG\\back2.png");
GetPng(fs,KBackPath,iBitmapBack,iBitmapBackMask);
iBVisiable = ETrue;
}

void CMyPicture::SetPicture(TDesC& aFilePath)

{
iFilePath = aFilePath;

}

void CMyPicture::SetVisiable(TBool aVisiable)

{
iBVisiable = aVisiable;
DrawNow();
}

void CMyPicture::GetPng(RFs &aFs,const TDesC &afilepath,CFbsBitmap *iBitmap,CFbsBitmap* iBmpMask)

{
_LIT8(MimeType, "image/png");
CImageDecoder* imageDecoder = CImageDecoder::FileNewL(aFs,afilepath,
MimeType,
CImageDecoder::EOptionAlwaysThread
);
iBitmap->Create(imageDecoder->FrameInfo().iOverallSizeInPixels,
imageDecoder->FrameInfo().iFrameDisplayMode /*was EColor4K*/);
// its a EColor16M
iBmpMask->Create(imageDecoder->FrameInfo().iOverallSizeInPixels,EGray256 /*was EGray2*/ );
TRequestStatus status;
imageDecoder->Convert( &status, *iBitmap, *iBmpMask );
User::WaitForRequest( status );
delete imageDecoder;

}

void CMyPicture::Draw(const TRect& aRect) const
{
CWindowGc& gc = SystemGc();
if (iBVisiable)
{
TRect bmpEmaPieceRect(TPoint(0,0),iBitmapBack->SizeInPixels());
gc.BitBltMasked(TPoint(10,10),iBitmapBack,bmpEmaPieceRect,iBitmapBackMask,ETrue);
}

}

使用这个类就可以实现自定义图片控件了。