| 512 | |
| 513 | |
| 514 | void SMCListView::UpdateVisibleItems() |
| 515 | { |
| 516 | if(!m_adapter) return; |
| 517 | int iOldFirstVisible = m_iFirstVisible; |
| 518 | int iOldLastVisible = m_iFirstVisible + m_lstItems.GetCount(); |
| 519 | int nOldTotalHeight = m_lvItemLocator->GetTotalHeight(); |
| 520 | |
| 521 | int iNewFirstVisible = m_lvItemLocator->Position2Item(m_siVer.nPos); |
| 522 | int iNewLastVisible = iNewFirstVisible; |
| 523 | int pos = m_lvItemLocator->Item2Position(iNewFirstVisible); |
| 524 | int iHoverItem = m_pHoverItem?(int)m_pHoverItem->GetItemIndex():-1; |
| 525 | m_pHoverItem = NULL; |
| 526 | |
| 527 | ItemInfo *pItemInfos = new ItemInfo[m_lstItems.GetCount()]; |
| 528 | SPOSITION spos = m_lstItems.GetHeadPosition(); |
| 529 | int i=0; |
| 530 | while(spos) |
| 531 | { |
| 532 | pItemInfos[i++]=m_lstItems.GetNext(spos); |
| 533 | } |
| 534 | |
| 535 | m_lstItems.RemoveAll(); |
| 536 | |
| 537 | if(iNewFirstVisible!=-1) |
| 538 | { |
| 539 | while(pos < m_siVer.nPos + (int)m_siVer.nPage && iNewLastVisible < m_adapter->getCount()) |
| 540 | { |
| 541 | DWORD dwState = WndState_Normal; |
| 542 | if(iHoverItem == iNewLastVisible) dwState |= WndState_Hover; |
| 543 | if(m_iSelItem == iNewLastVisible) dwState |= WndState_Check; |
| 544 | |
| 545 | ItemInfo ii={NULL,-1}; |
| 546 | ii.nType = m_adapter->getItemViewType(iNewLastVisible,dwState); |
| 547 | |
| 548 | if(iNewLastVisible>=iOldFirstVisible && iNewLastVisible < iOldLastVisible) |
| 549 | {//use the old visible item |
| 550 | int iItem = iNewLastVisible-iOldFirstVisible;//(iNewLastVisible-iNewFirstVisible) + (iNewFirstVisible-iOldFirstVisible); |
| 551 | SASSERT(iItem>=0 && iItem <= (iOldLastVisible-iOldFirstVisible)); |
| 552 | if(pItemInfos[iItem].nType == ii.nType) |
| 553 | {//类型相同才能重用 |
| 554 | ii = pItemInfos[iItem]; |
| 555 | pItemInfos[iItem].pItem = NULL;//标记该行已经被重用 |
| 556 | } |
| 557 | } |
| 558 | if(!ii.pItem) |
| 559 | {//create new visible item |
| 560 | SList<SItemPanel *> *lstRecycle = m_itemRecycle.GetAt(ii.nType); |
| 561 | if(lstRecycle->IsEmpty()) |
| 562 | {//创建一个新的列表项 |
| 563 | ii.pItem = SItemPanel::Create(this,pugi::xml_node(),this); |
| 564 | ii.pItem->GetEventSet()->subscribeEvent(EventItemPanelClick::EventID,Subscriber(&SMCListView::OnItemClick,this)); |
| 565 | }else |
| 566 | { |
| 567 | ii.pItem = lstRecycle->RemoveHead(); |
| 568 | } |
| 569 | ii.pItem->SetItemIndex(iNewLastVisible); |
| 570 | } |
| 571 | ii.pItem->SetVisible(TRUE); |
nothing calls this directly
no test coverage detected