imagedisplayer.cpp

使用yahoo图片搜索功能在手机上的以应用

#include "ImageDisplayer.h"
#include "YahooImageSearchAppUi.h"
#include "Yahoo.hrh"
#include "SearchResults.h"
#include "ImageContainerView.h"
#include <COEMAIN.h>

CImageDisplayer::CImageDisplayer()
 : CActive(EPriorityStandard), iDecoder(NULL), iBitmap(NULL)
{
}

CImageDisplayer::~CImageDisplayer()
{
	Cancel();
	delete iDecoder;
	delete iBitmap;
	iImageTitle.Close();
}

void CImageDisplayer::ConstructL()
{
	CActiveScheduler::Add(this);
}
	
void CImageDisplayer::DisplayImageL(const TDesC16& imageTitle, const TDesC8& imageData)
{
	Clear();
	iImageTitle.SetLength(0);
	iImageTitle.ReAllocL(imageTitle.Length());
	iImageTitle.Copy(imageTitle);
	iImageData.ReAllocL(imageData.Length());
	iImageData.Copy(imageData);
	RFs& rFs = CCoeEnv::Static()->FsSession();

	_LIT8(kJPEG, "image/jpeg");
	TBuf8<32> mimeType;
	mimeType.Copy(kJPEG);
	
	iDecoder = CImageDecoder::DataNewL(rFs, iImageData, mimeType);
	
	const TFrameInfo& frameInfo = iDecoder->FrameInfo();

	iBitmap = new (ELeave) CFbsBitmap;
	TDisplayMode displayMode = CEikonEnv::Static()->DefaultDisplayMode(); // frameInfo.iFrameDisplayMode
	User::LeaveIfError(iBitmap->Create(frameInfo.iOverallSizeInPixels, displayMode));
	
	iDecoder->Convert(&iStatus, *iBitmap);
	SetActive();	
}

void CImageDisplayer::RunL()
{
	Clear();
	CYahooImageSearchAppUi *appUi = static_cast<CYahooImageSearchAppUi*>(CCoeEnv::Static()->AppUi());
	CImageContainerView *imageView = appUi->ImageContainerView();
	imageView->SetImageL(iImageTitle, iBitmap);
	iBitmap = NULL;
	appUi->ActivateLocalViewL(TUid::Uid(EImageContainerViewId));
}

void CImageDisplayer::Clear()
{
	if (iDecoder)
		iDecoder->Cancel();
	delete iDecoder;
	iDecoder = NULL;
	iImageData.SetLength(0);
	iImageData.ReAlloc(0);
}

void CImageDisplayer::DoCancel()
{
	Clear();
	delete iBitmap;
	iBitmap = NULL;
}