列表框用法CAknSingleGraphicStyleListBox控件的用法

本文介绍如何在 Symbian 平台上使用 CAknSingleGraphicStyleListBox 创建带有图标和文本项的列表框，包括创建、配置、添加图标及文本列表等步骤。

CAknSingleGraphicStyleListBox

1.在头文件中定义：
    //列表框
    CAknSingleGraphicStyleListBox * iListBox;
    CDesCArrayFlat* iListBoxArray;

2.在.cpp文件ConstructL()中
    //创建列表
    iListBox = new (ELeave) CAknSingleGraphicStyleListBox(); //创建列表对象指针
    iListBox->SetContainerWindowL(*this);//设置容器窗口
    iListBox->ConstructL(this, EAknListBoxSelectionList);
    iListBox->SetExtent(TPoint(0, 0), TSize(aRect.Size().iWidth,
            aRect.Size().iHeight));
    //启动列表的滚动条
    iListBox->CreateScrollBarFrameL(ETrue);
    //关闭了水平的滚动条，垂直的滚动条设置为自动
    iListBox->ScrollBarFrame()->SetScrollBarVisibilityL(
            CEikScrollBarFrame::EOff, CEikScrollBarFrame::EAuto);

    //添加图标列表
    CArrayPtr<CGulIcon>* icons = new (ELeave) CAknIconArray(2);
    CleanupStack::PushL(icons);
    _LIT(KBitmapPath,"//resource//apps//CallSecretary.mbm");
    TFileName bitmapFile(KBitmapPath);
    User::LeaveIfError(CompleteWithAppPath(bitmapFile));
    //选中
    icons ->AppendL(CEikonEnv::Static()->CreateIconL(bitmapFile,
            EMbmCallsecretaryTick001, EMbmCallsecretaryTick001_mask));
    //未选中
    icons ->AppendL(CEikonEnv::Static()->CreateIconL(bitmapFile,
            EMbmCallsecretaryNull, EMbmCallsecretaryNull_mask));
    CleanupStack::Pop();
    iListBox->ItemDrawer()->ColumnData()->SetIconArray(icons);

    //添加项目列表
    iListBoxArray = new (ELeave) CDesCArrayFlat(10);
    CTextListBoxModel* model = iListBox->Model();
    model->SetItemTextArray(iListBoxArray);
    model->SetOwnershipType(ELbmOwnsItemArray);

3.在析构函数中释放
    MEM_FREE(iListBox);

4.CountComponentControls()中
return 1;

5.ComponentControl()中
    switch (aIndex)
        {
        case 0:
            {
            return iListBox;
            }
        default:
            return NULL;
        }

6.OfferKeyEventL()中

    TKeyResponse ret(EKeyWasNotConsumed);
    if (iListBox)
        {
        ret = iListBox->OfferKeyEventL(aKeyEvent, aType);
        return ret;
        }
    return ret;

7.初始化记录
    //清空列表选项
    iListBoxArray->Reset();

    TBuf<32> sTmpBuf;
    sTmpBuf.Append(_L("0/t wangshenghu"));
    iListBoxArray->AppendL(sTmpBuf);


    if (0 <= nCur)
        iListBox->SetCurrentItemIndex(nCur);
    iListBox->HandleItemAdditionL();
    iListBox->DrawDeferred();