singlelistcontainer.cpp

symbian有关文件操作的一个很好的例子

/*
* ============================================================================
*  Name     : CSingleListContainer from CCoeControl, MCoeControlObserver
*  Part of  : Hello
*  Copyright (c) 2003 Nokia. All rights reserved.
* ============================================================================
*/

// INCLUDE FILES

#include <aknlists.h>
#include <Helloldci.rsg>
#include "Helloldci.hrh"
#include "SingleListContainer.h"

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

// C++ default constructor can NOT contain any code, that
// might leave.
//
CSingleListContainer::CSingleListContainer()
    {
		m_pSingleList	= NULL;
		m_pListArray	= NULL;
    }

// EPOC default constructor can leave.
void CSingleListContainer::ConstructL(const TRect& aRect)
    {
    CreateWindowL();

	m_pSingleList = new(ELeave) CAknSingleNumberStyleListBox;
	m_pSingleList->SetContainerWindowL(*this);
	m_pSingleList->ConstructL(this,EAknListBoxSelectionList);
	
	//启动滚动条
	m_pSingleList->CreateScrollBarFrameL(ETrue);
	m_pSingleList->ScrollBarFrame()->SetScrollBarVisibilityL(CEikScrollBarFrame::EOff,CEikScrollBarFrame::EAuto);
    
	//创建列表项数组
	m_pListArray = new(ELeave) CDesCArrayFlat(10);
	CTextListBoxModel* model = m_pSingleList->Model();
	model->SetItemTextArray(m_pListArray);
	//设置模型是否拥有数据，如果为ELbmDoesNotOwnItemArray，需要我们手动删除
	//如果设置为ELbmOwnItemArray，则不需要我们做处理
	model->SetOwnershipType(ELbmDoesNotOwnItemArray);//ELbmOwnItemArray
	
	//添加数据
	AddInfoToList(0,_L("hello!"));
	AddInfoToList(1,_L("hello!"));

	m_pSingleList->SetCurrentItemIndex(1);
	SetRect(aRect);
    ActivateL();
    }

// Destructor
CSingleListContainer::~CSingleListContainer()
    {
		if(m_pSingleList)
		{
			delete m_pSingleList;
			m_pSingleList = NULL;
		}
		if (m_pListArray)
		{
			m_pListArray->Reset();
			delete m_pListArray;
			m_pListArray = NULL;
		}
    }

// ---------------------------------------------------------
// CSingleListContainer::SizeChanged()
// Called by framework when the view size is changed
// (other items were commented in a header).
// ---------------------------------------------------------
//
void CSingleListContainer::SizeChanged()
{
	if (m_pSingleList)
	{
		m_pSingleList->SetRect(Rect());
	}
	
}

// ---------------------------------------------------------
// CSingleListContainer::CountComponentControls() const
// (other items were commented in a header).
// ---------------------------------------------------------
//
TInt CSingleListContainer::CountComponentControls() const
    {
	//return 0; // return nbr of controls inside this container
	return 1;
    }

// ---------------------------------------------------------
// CSingleListContainer::ComponentControl(TInt aIndex) const
// (other items were commented in a header).
// ---------------------------------------------------------
//
CCoeControl* CSingleListContainer::ComponentControl(TInt aIndex) const
    {
	return m_pSingleList;

    }

// ---------------------------------------------------------
// CSingleListContainer::Draw(const TRect& aRect) const
// (other items were commented in a header).
// ---------------------------------------------------------
//
void CSingleListContainer::Draw(const TRect& aRect) const
    {
    CWindowGc& gc = SystemGc();
	gc.Clear(aRect);
    gc.SetPenStyle(CGraphicsContext::ENullPen);
    gc.SetBrushColor(KRgbGray);
    gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
    gc.DrawRect(aRect);
    }

// ---------------------------------------------------------
// CSingleListContainer::OfferKeyEventL(...)
// Notify key events to editors.
// (other items were commented in a header).
// ---------------------------------------------------------
//
TKeyResponse CSingleListContainer::OfferKeyEventL(
    const TKeyEvent& aKeyEvent, TEventCode aType)
	{
		if(m_pSingleList)
		{
			return m_pSingleList->OfferKeyEventL(aKeyEvent,aType);
		}
		return EKeyWasNotConsumed;
	}
void CSingleListContainer::AddInfoToList(TInt aNumber,const TDesC& aContent)
{
	TBuf<32> sBuf;
	sBuf.AppendNum(aNumber);
	sBuf.Append(_L("\t"));
	sBuf.Append(aContent);

	m_pListArray->AppendL(sBuf);
	//listbox添加数据
	m_pSingleList->HandleItemAdditionL();
}
void CSingleListContainer::DelInfoFromList()
{
	TInt currentIndex = m_pSingleList->CurrentItemIndex();
	if (currentIndex == -1) return;
	m_pListArray->Delete(currentIndex);
//删除最后一项有问题
//	m_pSingleList->HandleItemRemovalL();
	AknListBoxUtils::HandleItemRemovalAndPositionHighlightL(m_pSingleList,currentIndex,ETrue);
}
// End of File