showinfodialog.cpp

Symbian OS 图片转换程序源代码 可以学习一下

/*
* ============================================================================
*  Name     : CShowInfoDialog from ShowInfoDialog.cpp
*  Part of  : ImageConverter
*  Created  : 25.11.2003 Forum Nokia
*  Description:
*     Used to show information of a image frame.
*  Version  :
*  Copyright: Nokia Corporation
* ============================================================================
*/

// INCLUDE FILES
#include <aknlists.h>
#include <ImageConversion.h>
#include <aknnotewrappers.h>

#include "ImageConverter.hrh"
#include "ShowInfoDialog.h"
#include "ImageConverterEngine.h"

// ================= MEMBER FUNCTIONS =======================

// C++ default constructor can NOT contain any code, that
// might leave.
//
CShowInfoDialog::CShowInfoDialog( CFrameInfoStrings* aInfoStrings ) : 
	iInfoStrings( aInfoStrings )
    {
    }

CShowInfoDialog::~CShowInfoDialog()
	{
	delete iListBox;
	}


// ----------------------------------------------------------
// CShowInfoDialog::PreLayoutDynInitL()
// Initializing the dialog dynamically
// ----------------------------------------------------------
//
void CShowInfoDialog::PreLayoutDynInitL()
    {
    SetEditableL(ETrue);

    // Create a control to display a list of messages
    iListBox = new (ELeave) CAknSingleStyleListBox;
    iListBox->SetContainerWindowL(*this);
    iListBox->ConstructL(this, 0);

    iListBox->ActivateL();
    iListBox->CreateScrollBarFrameL(ETrue);
    iListBox->ScrollBarFrame()->
		SetScrollBarVisibilityL(CEikScrollBarFrame::EOn, 
								CEikScrollBarFrame::EAuto);

    // Create an array to hold the messages
    iMessageList = new (ELeave) CDesCArrayFlat(10);

    // Give it to the control
    CTextListBoxModel* model = iListBox->Model();
    model->SetItemTextArray(iMessageList);
    model->SetOwnershipType(ELbmOwnsItemArray); // transfer ownership of iMessageList

    }

void CShowInfoDialog::PostLayoutDynInitL()
	{
	iListBox->SetRect( Rect() );

	_LIT( KTab, "\t" );

	for( TInt i=0; i<iInfoStrings->Count(); i++ ) 
		{
		TBuf<80> desc;

		desc.Append( KTab );
		desc.Append( iInfoStrings->String(i) );
	
		iMessageList->AppendL( desc );
		}

    // tell the control about the change
    iListBox->HandleItemAdditionL();
	}

// ----------------------------------------------------------
// CShowInfoDialog::OkToExitL()
// This function ALWAYS returns ETrue
// ----------------------------------------------------------
//
TBool CShowInfoDialog::OkToExitL(TInt /*aButtonId*/)
    {
	return ETrue;
    }

TInt CShowInfoDialog::CountComponentControls() const
    {
	if( iListBox )
		return( 1 );
	else 
		return( 0 ); 
	}

CCoeControl* CShowInfoDialog::ComponentControl(TInt /*aIndex*/) const
    {
	return iListBox;
    }

TKeyResponse CShowInfoDialog::OfferKeyEventL(
	const TKeyEvent& aKeyEvent,TEventCode aType)
	{
	if(aType == EEventKey) 
		{
		if	(aKeyEvent.iCode == EKeyOK) 
			{
			ShowInfoDialogL();
			return( EKeyWasConsumed );
			}
		}

	if( iListBox )
		return( iListBox->OfferKeyEventL(aKeyEvent, aType) );
	else
		return( EKeyWasNotConsumed );
	}

void CShowInfoDialog::ShowInfoDialogL()
	{
	CAknInformationNote* dlg = new(ELeave)CAknInformationNote();
	dlg->SetTimeout( CAknInformationNote::ENoTimeout );
	dlg->ExecuteLD( iInfoStrings->String(iListBox->CurrentItemIndex()) );
	}