searchresultsview.cpp

使用yahoo图片搜索功能在手机上的以应用

/*
========================================================================
 Name		: SearchResultsView.cpp
 Author	  : 
 Copyright   : Copyright 2006 Nokia Corporation
 Description : 
========================================================================
*/
// [[[ begin generated region: do not modify [Generated System Includes]
#include <aknviewappui.h>
#include <eikmenub.h>
#include <avkon.hrh>
#include <barsread.h>
#include <stringloader.h>
#include <aknlists.h>
#include <eikenv.h>
#include <akniconarray.h>
#include <eikclbd.h>
#include <akncontext.h>
#include <akntitle.h>
#include <eikbtgpc.h>
#include <gdi.h>
#include <eikedwin.h>
#include <aknquerydialog.h>
#include <aknnotewrappers.h>
#include <Yahoo.rsg>
// ]]] end generated region [Generated System Includes]

// [[[ begin generated region: do not modify [Generated User Includes]
#include "Yahoo.hrh"
#include "SearchResultsView.h"
#include "SearchResults.hrh"
#include "SearchResults.h"
// ]]] end generated region [Generated User Includes]


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

const int MAX_SEARCH_STRING_LENGTH = 100;

/**
 * First phase of Symbian two-phase construction. Should not contain any
 * code that could leave.
 */
CSearchResultsView::CSearchResultsView()
	{
	// [[[ begin generated region: do not modify [Generated Contents]
	iSearchResults = NULL;
	iWebClient = NULL;
	// ]]] end generated region [Generated Contents]
	iSearchModel = NULL;
	iSelectedItem = -1;
	}
/** 
 * The view's destructor removes the container from the control
 * stack and destroys it.
 */
CSearchResultsView::~CSearchResultsView()
	{
	// [[[ begin generated region: do not modify [Generated Contents]
	delete iSearchResults;
	iSearchResults = NULL;
	delete iWebClient;
	iWebClient = NULL;
	TRAPD( err_WaitDialog, RemoveWaitDialogL() );
	// ]]] end generated region [Generated Contents]
	
	delete iSearchModel;
	delete iImageDisplayer;
	iImageBuffer.Close();
	}

/**
 * Symbian two-phase constructor.
 * This creates an instance then calls the second-phase constructor
 * without leaving the instance on the cleanup stack.
 * @return new instance of CSearchResultsView
 */
CSearchResultsView* CSearchResultsView::NewL()
	{
	CSearchResultsView* self = CSearchResultsView::NewLC();
	CleanupStack::Pop( self );
	return self;
	}

/**
 * Symbian two-phase constructor.
 * This creates an instance, pushes it on the cleanup stack,
 * then calls the second-phase constructor.
 * @return new instance of CSearchResultsView
 */
CSearchResultsView* CSearchResultsView::NewLC()
	{
	CSearchResultsView* self = new (ELeave) CSearchResultsView();
	CleanupStack::PushL( self );
	self->ConstructL();
	return self;
	}


/**
 * Second-phase constructor for view.  
 * Initialize contents from resource.
 */ 
void CSearchResultsView::ConstructL()
	{
	// [[[ begin generated region: do not modify [Generated Code]
	BaseConstructL( R_SEARCH_RESULTS_SEARCH_RESULTS_VIEW );
				
	iWebClient = CWebClientEngine::NewL( *this );
	// ]]] end generated region [Generated Code]
	
	iSearchModel = new (ELeave) CYahooSearchModel;
	iSearchModel->ConstructL();
	
	iImageDisplayer = new (ELeave) CImageDisplayer;
	iImageDisplayer->ConstructL();
	}
	
/**
 * @return The UID for this view
 */
TUid CSearchResultsView::Id() const
	{
	return TUid::Uid( ESearchResultsViewId );
	}

/**
 * Handle a command for this view (override)
 * @param aCommand command id to be handled
 */
void CSearchResultsView::HandleCommandL( TInt aCommand )
	{   
	// [[[ begin generated region: do not modify [Generated Code]
	TBool commandHandled = EFalse;
	switch ( aCommand )
		{	// code to dispatch to the AknView's menu and CBA commands is generated here
		case ESearchResultsViewNew_searchMenuItemCommand:
			commandHandled = HandleNew_searchMenuItemSelectedL( aCommand );
			break;
		case ESearchResultsViewInfoMenuItemCommand:
			commandHandled = HandleInfoMenuItemSelectedL( aCommand );
			break;
		default:
			break;
		}
	
		
	if ( !commandHandled ) 
		{
	
		if ( aCommand == EAknSoftkeyExit )
			{
			AppUi()->HandleCommandL( EEikCmdExit );
			}
	
		}
	// ]]] end generated region [Generated Code]
	
	}

/**
 *
 * @param aPrevViewId 
 * @param aCustomMessageId 
 * @param aCustomMessage
 */
void CSearchResultsView::DoActivateL(
		const TVwsViewId& /*aPrevViewId*/,
		TUid /*aCustomMessageId*/,
		const TDesC8& /*aCustomMessage*/ )
	{
	// [[[ begin generated region: do not modify [Generated Contents]
	SetupStatusPaneL();
	
				
	if ( iSearchResults == NULL )
		{
		iSearchResults = CreateContainerL();
		iSearchResults->SetMopParent( this );
		AppUi()->AddToStackL( *this, iSearchResults );
		} 
	// ]]] end generated region [Generated Contents]
		PopulateSearchResultsL();
		if (iSelectedItem >= 0)
			iSearchResults->ListBox()->SetCurrentItemIndex(iSelectedItem);
	}

/**
 */
void CSearchResultsView::DoDeactivate()
	{
	// [[[ begin generated region: do not modify [Generated Contents]
	CleanupStatusPane();
	
	if ( iSearchResults != NULL )
		{
		AppUi()->RemoveFromViewStack( *this, iSearchResults );
		delete iSearchResults;
		iSearchResults = NULL;
		}
	// ]]] end generated region [Generated Contents]
	
	}

// [[[ begin generated function: do not modify
void CSearchResultsView::SetupStatusPaneL()
	{
	// reset the context pane
	TUid contextPaneUid = TUid::Uid( EEikStatusPaneUidContext );
	CEikStatusPaneBase::TPaneCapabilities subPaneContext = 
		StatusPane()->PaneCapabilities( contextPaneUid );
	if ( subPaneContext.IsPresent() && subPaneContext.IsAppOwned() )
		{
		CAknContextPane* context = static_cast< CAknContextPane* > ( 
			StatusPane()->ControlL( contextPaneUid ) );
		context->SetPictureToDefaultL();
		}
	
	// setup the title pane
	TUid titlePaneUid = TUid::Uid( EEikStatusPaneUidTitle );
	CEikStatusPaneBase::TPaneCapabilities subPaneTitle = 
		StatusPane()->PaneCapabilities( titlePaneUid );
	if ( subPaneTitle.IsPresent() && subPaneTitle.IsAppOwned() )
		{
		CAknTitlePane* title = static_cast< CAknTitlePane* >( 
			StatusPane()->ControlL( titlePaneUid ) );
		TResourceReader reader;
		iEikonEnv->CreateResourceReaderLC( reader, R_SEARCH_RESULTS_TITLE_RESOURCE );
		title->SetFromResourceL( reader );
		CleanupStack::PopAndDestroy(); // reader internal state
		}
				
	}

// ]]] end generated function

// [[[ begin generated function: do not modify
void CSearchResultsView::CleanupStatusPane()
	{
	}

// ]]] end generated function

/** 
 * Handle status pane size change for this view (override)
 */
void CSearchResultsView::HandleStatusPaneSizeChange()
	{
	CAknView::HandleStatusPaneSizeChange();
	
	// this may fail, but we're not able to propagate exceptions here
	TInt result;
	TRAP( result, SetupStatusPaneL() ); 
	// [[[ begin generated region: do not modify [Generated Code]
	// ]]] end generated region [Generated Code]
	
	}
	
/**
 * ClientOpenFailed( CWebClientEngine& anEngine )
 * An error occurred opening the HTTP session. The calling code
 * will leave after this method returns.
 * @param anError: the error code
 * Most common error; no access point configured, and session creation
 * leaves with KErrNotFound.
 */			
void CSearchResultsView::ClientOpenSessionFailedL( CWebClientEngine& anEngine, TInt anError )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	// ]]] end generated region [Generated Code]
	}
/**
 * ClientConnecting()
 * Called to notify that a connection was initiated
 */			
void CSearchResultsView::ClientConnectingL( CWebClientEngine& anEngine )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	// ]]] end generated region [Generated Code]
	}
/**
 * ClientHeaderReceived()
 * Called when HTTP header is received.
 * @param aHeaderData: Header field name and value
 */			
void CSearchResultsView::ClientHeaderReceivedL( CWebClientEngine& anEngine, const TDesC& aHeaderData )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	// ]]] end generated region [Generated Code]
	}
/**
 * ClientBodyReceived()
 * Called when a part of the HTTP body is received.
 * @param aBodyData:  Part of the body data received. (e.g. part of
 *					the received HTML page)
 */			
void CSearchResultsView::ClientBodyReceivedL( CWebClientEngine& anEngine, const TDesC8& aBodyData )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	HandleWebClientBodyReceivedL( anEngine, aBodyData );
	// ]]] end generated region [Generated Code]
	}
/**
 * ClientConnectionCanceled()
 * Called to notify that a connection attempt has been canceled
 */			
void CSearchResultsView::ClientConnectionCanceledL( CWebClientEngine& anEngine )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	// ]]] end generated region [Generated Code]
	}
/**
 * ClientResponseComplete
 * Called to notify that a transaction's response is complete.
 * See TTransactionEvent::EResponseComplete
 */			
void CSearchResultsView::ClientResponseCompleteL( CWebClientEngine& anEngine )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	// ]]] end generated region [Generated Code]
	}
/**
 * ClientTransactionSucceeded()
 * Called to notify that a transaction completed successfully
 * See TTransactionEvent::ESucceeded
 */			
void CSearchResultsView::ClientTransactionSucceededL( CWebClientEngine& anEngine )
	{
	// [[[ begin generated region: do not modify [Generated Code]
	
	RemoveWaitDialogL();
	HandleWebClientTransactionSucceededL( anEngine );
	// ]]] end generated region [Generated Code]
	
	}
/** 
 * ClientTransactionFailed()