listview.cpp

《基于Symbian OS的手机开发与应用实践》这本书的配套源码。

/*
* ============================================================================
*  Name     : CListView from ListView.h
*  Part of  : MultiView
*  Created  : 03.12.2005 by ToBeReplacedByAuthor
*  Implementation notes:
*     Initial content was generated by Series 60 AppWizard.
*  Version  :
*  Copyright: ToBeReplacedByCopyright
* ============================================================================
*/

// INCLUDE FILES
#include  <aknviewappui.h>
#include  <avkon.hrh>
#include  <MultiView.rsg>
#include  "MultiView.hrh"
#include  "ListView.h"
#include  "ListViewContainer.h" 
#include <aknlists.h>  // for Listbox

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

// ---------------------------------------------------------
// CListView::ConstructL(const TRect& aRect)
// EPOC two-phased constructor
// ---------------------------------------------------------
//
void CListView::ConstructL()
    {
    BaseConstructL( R_MULTIVIEW_VIEW1 );
    }

// ---------------------------------------------------------
// CListView::~CListView()
// destructor
// ---------------------------------------------------------
//
CListView::~CListView()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromViewStack( *this, iContainer );
        }

    delete iContainer;
    }

// ---------------------------------------------------------
// TUid CListView::Id()
//
// ---------------------------------------------------------
//
TUid CListView::Id() const
    {
    return KViewId;
    }

// ---------------------------------------------------------
// CListView::HandleCommandL(TInt aCommand)
// takes care of view command handling
// ---------------------------------------------------------
//
void CListView::HandleCommandL(TInt aCommand)
    {   
    switch ( aCommand )
        {
        case EMultiViewCmdList:
            {
            iEikonEnv->InfoMsg( _L("Command from Listview") );
            break;
            }
        case EAknSoftkeyBack:
            {
            AppUi()->HandleCommandL(EEikCmdExit);
            break;
            }
        default:
            {
            AppUi()->HandleCommandL( aCommand );
            break;
            }
        }
    }

// ---------------------------------------------------------
// CListView::HandleClientRectChange()
// ---------------------------------------------------------
//
void CListView::HandleClientRectChange()
    {
    if ( iContainer )
        {
        iContainer->SetRect( ClientRect() );
        }
    }

// ---------------------------------------------------------
// CListView::DoActivateL(...)
// 
// ---------------------------------------------------------
//
void CListView::DoActivateL(
   const TVwsViewId& /*aPrevViewId*/,TUid aCustomMessageId,
   const TDesC8& aCustomMessage)
    {
    if (!iContainer)
        {
        iContainer = new (ELeave) CListViewContainer;
        iContainer->SetMopParent(this);
        iContainer->ConstructL( ClientRect() );
        AppUi()->AddToStackL( *this, iContainer );
        } 
    if (aCustomMessageId == KCustomMessageUid)
        {
        //如果是需要捕获的消息，根据消息的内容，更改列表的初始选项
        TUint index = aCustomMessage[0];
        CAknSingleStyleListBox* listbox = iContainer->iListBox;
        listbox->SetCurrentItemIndex(index);
        
        //下面的代码显示一条消息，提示用户当前列表的缺省选项有变化，并不完成功能性操作
        TBuf<32> buf;
        _LIT(KFormat1,"The index is: %d");
        buf.Format(KFormat1,index);
        iEikonEnv->InfoMsg(buf);
        }
   }

// ---------------------------------------------------------
// CListView::DoDeactivate()
// 
// ---------------------------------------------------------
//
void CListView::DoDeactivate()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromViewStack( *this, iContainer );
        }
    
    delete iContainer;
    iContainer = NULL;
    }

// End of File