searchresultsview.h

使用yahoo图片搜索功能在手机上的以应用

/*
========================================================================
 Name		: SearchResultsView.h
 Author	  : 
 Copyright   : Copyright 2006 Nokia Corporation
 Description : 
========================================================================
*/
#ifndef SEARCHRESULTSVIEW_H
#define SEARCHRESULTSVIEW_H

// [[[ begin generated region: do not modify [Generated Includes]
#include <aknview.h>
#include <aknwaitdialog.h>
// ]]] end generated region [Generated Includes]
#include "YahooSearchModel.h"
#include "ImageDisplayer.h"

// [[[ begin [Event Handler Includes]
#include "WebClientEngine.h"
// ]]] end [Event Handler Includes]

// [[[ begin generated region: do not modify [Generated Forward Declarations]
class CSearchResults;
// ]]] end generated region [Generated Forward Declarations]

// [[[ begin generated region: do not modify [Generated Constants]
// ]]] end generated region [Generated Constants]

/**
 * Avkon view class for SearchResultsView. It is register with the view server
 * by the AppUi. It owns the container control.
 * @class	CSearchResultsView SearchResultsView.h
 */
class CSearchResultsView : public CAknView
	,MWebClientObserver	{
public:
	// constructors and destructor
	CSearchResultsView();
	static CSearchResultsView* NewL();
	static CSearchResultsView* NewLC();		
	void ConstructL();
	virtual ~CSearchResultsView();

public:
	// from base class CAknView
	TUid Id() const;
	void HandleCommandL( TInt aCommand );

protected:
	// from base class CAknView
	void DoActivateL(
		const TVwsViewId& aPrevViewId,
		TUid aCustomMessageId,
		const TDesC8& aCustomMessage);
	void DoDeactivate();
	void HandleStatusPaneSizeChange();
	
private:
	void SetupStatusPaneL();
	void CleanupStatusPane();
	
	void AppendImageDataL(const TDesC8& data);
	void PopulateSearchResultsL();
	
	// [[[ begin [Public Section]
public:
	// [[[ begin generated region: do not modify [Generated Methods]
	CSearchResults* CreateContainerL();
	void IssueHTTPGetL( const TDesC8* aUrl = NULL );
	void ExecuteWaitDialogLD( const TDesC* aOverrideText = NULL );
	void RemoveWaitDialogL();
	static TInt RunSearchPromptL( 
			TDes& aData, 
			TBool aUseDefaults = ETrue, 
			const TDesC* aOverridePrompt = NULL );
	static void RunAttributionL( const TDesC* aOverrideText = NULL );
	// ]]] end generated region [Generated Methods]
	
	void ShowSelectedImageL();	
	
	// ]]] end [Public Section]
				
	// [[[ begin [Protected Section]
protected: 
	// [[[ begin [Overridden Methods]
	
	// ]]] end [Overridden Methods]
	// Implementations of MWebClientObserver methods
	virtual void ClientOpenSessionFailedL( CWebClientEngine& anEngine , TInt anError );
	virtual void ClientConnectingL(  CWebClientEngine& anEngine );
	virtual void ClientHeaderReceivedL( CWebClientEngine& anEngine, const TDesC& aHeaderData );
	virtual void ClientBodyReceivedL( CWebClientEngine& anEngine, const TDesC8& aBodyData );
	virtual void ClientConnectionCanceledL( CWebClientEngine& anEngine );
	virtual void ClientResponseCompleteL( CWebClientEngine& anEngine );
	virtual void ClientTransactionSucceededL( CWebClientEngine& anEngine );
	virtual void ClientTransactionFailedL( CWebClientEngine& anEngine );
	virtual void ClientUnknownEventL( CWebClientEngine& anEngine, TInt aStatus );
	virtual void ClientRunErrorL( CWebClientEngine& anEngine, TInt anError);
	virtual TBool ClientGetCredentialsL( CWebClientEngine& anEngine, const TUriC8& aUri, const TDesC8& aRealm, TDes& aUsername, TDes& aPassword );
	
	// [[[ begin [User Handlers]
protected: 
	void HandleWaitDialog1CanceledL( CAknProgressDialog *aDialog );
	void HandleWebClientBodyReceivedL( CWebClientEngine& anEngine, const TDesC8& aBodyData );
	void HandleWebClientTransactionFailedL( CWebClientEngine& anEngine );
	void HandleWebClientTransactionSucceededL( CWebClientEngine& anEngine );
	TBool HandleNew_searchMenuItemSelectedL( TInt aCommand );
	TBool HandleInfoMenuItemSelectedL( TInt aCommand );
	// ]]] end [User Handlers]
	

	// ]]] end [Protected Section]

	// [[[ begin [Private Section]
private:
	// [[[ begin generated region: do not modify [Generated Instance Variables]
	CSearchResults* iSearchResults;
	CWebClientEngine* iWebClient;
	CAknWaitDialog* iWaitDialog;
	class CProgressDialogCallback;
	CProgressDialogCallback* iWaitDialogCallback;
	// ]]] end generated region [Generated Instance Variables]

	// [[[ begin generated region: do not modify [Generated Methods]
	// ]]] end generated region [Generated Methods]
	
	// ]]] end [Private Section]
	
	enum RequestType {
		SEARCH_REQUEST,
		IMAGE_REQUEST		
	};
	RequestType requestType;
	CYahooSearchModel *iSearchModel;
	RBuf8 iImageBuffer;
	CImageDisplayer *iImageDisplayer;
	int iSelectedItem;
	
	// [[[ begin [MProgressDialogCallback support]
private: 
	typedef void (CSearchResultsView::*ProgressDialogEventHandler)( CAknProgressDialog *aProgressDialog );
	
	/**
	 * This is a helper class for progress/wait dialog callbacks. It routes the dialog's
	 * cancel notification to the handler function for the cancel event.
	 */
	class CProgressDialogCallback : public CBase, public MProgressDialogCallback
		{ 
		public:
			CProgressDialogCallback( CSearchResultsView *aHandlerObj, CAknProgressDialog *aDialog, ProgressDialogEventHandler aHandler)
				: handlerObj(aHandlerObj), dialog(aDialog), handler(aHandler) {}
				
			void DialogDismissedL (TInt aButtonId) { (handlerObj->*handler)( dialog );}
		private:
			CSearchResultsView *handlerObj;
			CAknProgressDialog *dialog;
			ProgressDialogEventHandler handler;
		};
		
	// ]]] end [MProgressDialogCallback support]
	
	};

#endif // SEARCHRESULTSVIEW_H