使用DuiLib开发Windows界面实在是太简单了，对于MFC程序员真的是脱离苦海，控件自绘什么的GDI\GDI+真要把人搞死。DuiLib是国内一个非常有名的开源界面库，目前很多软件都是用了它（百度卫士、杀毒、PPS……），感谢开源的前辈们。
扩展列表控件的滚动消息，加上一个定时器，让他可以自动滚动一段再停下来。
void CDownloadListUI::DoEvent( TEventUI& event ){if( !IsMouseEnabled() && event.Type > UIEVENT__MOUSEBEGIN && event.Type < UIEVENT__MOUSEEND ) {if( m_pParent != NULL ) m_pParent->DoEvent(event);else CTileLayoutUI::DoEvent(event);return;}if( event.Type == UIEVENT_TIMER && event.wParam == SCROLL_TIMERID ){if( (m_uButtonState & UISTATE_CAPTURED) != 0 ) {POINT pt = m_pManager->GetMousePos();LONG cy = (pt.y – m_ptLastMouse.y);m_ptLastMouse = pt;SIZE sz = GetScrollPos();sz.cy -= cy;SetScrollPos(sz);return;}else if( m_dwDelayLeft > 0 ) {–m_dwDelayLeft;SIZE sz = GetScrollPos();LONG lDeltaY = (LONG)(CalculateDelay((double)m_dwDelayLeft / m_dwDelayNum) * m_dwDelayDeltaY);if( (lDeltaY > 0 && sz.cy != 0) || (lDeltaY < 0 && sz.cy != GetScrollRange().cy ) ) {sz.cy -= lDeltaY;SetScrollPos(sz);return;}}m_dwDelayDeltaY = 0;m_dwDelayNum = 0;m_dwDelayLeft = 0;m_pManager->KillTimer(this, SCROLL_TIMERID);return;}if( event.Type == UIEVENT_SCROLLWHEEL ){LONG lDeltaY = 0;if( m_dwDelayNum > 0 ) lDeltaY = (LONG)(CalculateDelay((double)m_dwDelayLeft / m_dwDelayNum) * m_dwDelayDeltaY);switch( LOWORD(event.wParam) ) {case SB_LINEUP:if( m_dwDelayDeltaY >= 0 ) m_dwDelayDeltaY = lDeltaY + 8;else m_dwDelayDeltaY = lDeltaY + 12;break;case SB_LINEDOWN:if( m_dwDelayDeltaY <= 0 ) m_dwDelayDeltaY = lDeltaY – 8;else m_dwDelayDeltaY = lDeltaY – 12;break;}if( m_dwDelayDeltaY > 100 ) m_dwDelayDeltaY = 100;else if( m_dwDelayDeltaY < -100 ) m_dwDelayDeltaY = -100;m_dwDelayNum = (DWORD)sqrt((double)abs(m_dwDelayDeltaY)) * 5;m_dwDelayLeft = m_dwDelayNum;m_pManager->SetTimer(this, SCROLL_TIMERID, 50U);return;}CTileLayoutUI::DoEvent(event);}首先是添加节点到列表控件中，为了在后面对每个节点的点击事件进行区分，我们需要唯一标识每个节点里的控件，这里我是用控件名称来标识的。void CDownloadListUI::AddItem(){CDialogBuilder builder;CContainerUI* pItem=static_cast<CContainerUI*>(builder.Create(L"Item_load.xml", 0));if ( pItem ){int i=GetCount();CDuiString strText;strText.Format(L"%02d", i+1);CControlUI* pControl=pItem->GetItemAt(0);if ( pControl )pControl->SetText(strText);pControl=pItem->GetItemAt(2);CProgressUI* pProgress=(CProgressUI*)pControl->GetInterface(L"Progress");if ( pProgress )pProgress->SetValue(i+1);pControl=pItem->GetItemAt(3);if ( pControl ){strText.Format(L"%d%%", i+1);pControl->SetText(strText);}pControl=pItem->GetItemAt(4);if ( pControl )pControl->SetText(L"正在下载");pControl=pItem->GetItemAt(5);if ( pControl ){strText.Format(L"BtnLoad1%d", i);pControl->SetName(strText);pControl->SetTag(i);}pControl=pItem->GetItemAt(6);if ( pControl ){strText.Format(L"BtnLoad2%d", i);pControl->SetName(strText);pControl->SetTag(i);}pControl=pItem->GetItemAt(7);if ( pControl ){strText.Format(L"BtnLoad3%d", i);pControl->SetName(strText);pControl->SetTag(i);}Add(pItem);}}因此在点击事件的判断里，我只需要对比前面几个字符就可以对消息进行分发了：
void CMainWnd::OnClick( TNotifyUI& msg ){if ( wcsncmp(msg.pSender->GetName(), L"BtnLoad1", 8)==0 )OnBtnCancel(msg);else if ( wcsncmp(msg.pSender->GetName(), L"BtnLoad2", 8)==0 )OnBtnPause(msg);else if ( wcsncmp(msg.pSender->GetName(), L"BtnLoad3", 8)==0 )OnBtnContinue(msg);else if ( wcsncmp(msg.pSender->GetName(), L"BtnFinish", 9)==0 )OnBtnDelete(msg);CWindowBase::OnClick(msg);}分发消息处理函数里，我需要知道到底点击的是那个节点上的控件，这时候我们前面设置的Tag就有用了：
void CMainWnd::OnBtnCancel( TNotifyUI& msg ){int nIndex=msg.pSender->GetTag();int nCount=m_pDownloadList->GetCount();if ( nIndex<0 || nIndex>=nCount )return ;m_pDownloadList->RemoveAt(nIndex);for ( int i=0; i<nCount; ++i ){CContainerUI* pLayout=static_cast<CContainerUI*>(m_pDownloadList->GetItemAt(i));if ( pLayout==NULL )continue;CControlUI* pBtn=pLayout->GetItemAt(5);if ( pBtn )pBtn->SetTag(i);pBtn=pLayout->GetItemAt(6);if ( pBtn )pBtn->SetTag(i);pBtn=pLayout->GetItemAt(7);if ( pBtn )pBtn->SetTag(i);}}这个小例只是做了界面的处理部分，没有什么实际的功能。你如果需要做下载管理，，可以在里面扩展下载部分。
程序运行截图：
从此便踏上征途，也许会孤独一程。
