| 268 | } |
| 269 | |
| 270 | void STileView::UpdateVisibleItems() |
| 271 | { |
| 272 | if(!m_adapter) |
| 273 | { |
| 274 | return; |
| 275 | } |
| 276 | int iOldFirstVisible = m_iFirstVisible; |
| 277 | int iOldLastVisible = m_iFirstVisible + (int)m_lstItems.GetCount(); |
| 278 | |
| 279 | int iNewFirstVisible = m_tvItemLocator->Position2Item(m_siVer.nPos); |
| 280 | int iNewLastVisible = iNewFirstVisible; |
| 281 | |
| 282 | int pos = m_tvItemLocator->Item2Position(iNewFirstVisible); |
| 283 | int iHoverItem = m_pHoverItem?(int)m_pHoverItem->GetItemIndex():-1; |
| 284 | |
| 285 | ItemInfo *pItemInfos = new ItemInfo[m_lstItems.GetCount()]; |
| 286 | SPOSITION spos = m_lstItems.GetHeadPosition(); |
| 287 | int i = 0; |
| 288 | while(spos) |
| 289 | { |
| 290 | pItemInfos[i++] = m_lstItems.GetNext(spos); |
| 291 | } |
| 292 | |
| 293 | m_lstItems.RemoveAll(); |
| 294 | |
| 295 | if(iNewFirstVisible != -1) |
| 296 | { |
| 297 | while(pos < m_siVer.nPos + (int)m_siVer.nPage && iNewLastVisible < m_adapter->getCount()) |
| 298 | { |
| 299 | DWORD dwState = WndState_Normal; |
| 300 | if(iHoverItem == iNewLastVisible) dwState |= WndState_Hover; |
| 301 | if(m_iSelItem == iNewLastVisible) dwState |= WndState_Check; |
| 302 | |
| 303 | ItemInfo ii = {NULL, -1}; |
| 304 | ii.nType = m_adapter->getItemViewType(iNewLastVisible,dwState); |
| 305 | if(iNewLastVisible >= iOldFirstVisible && iNewLastVisible < iOldLastVisible) |
| 306 | { |
| 307 | //use the old visible item |
| 308 | int iItem = iNewLastVisible - iOldFirstVisible; |
| 309 | SASSERT(iItem >= 0 && iItem <= (iOldLastVisible - iOldFirstVisible)); |
| 310 | if(ii.nType == pItemInfos[iItem].nType) |
| 311 | { |
| 312 | ii = pItemInfos[iItem]; |
| 313 | pItemInfos[iItem].pItem = NULL;//标记该行已经被重用 |
| 314 | } |
| 315 | } |
| 316 | if(!ii.pItem) |
| 317 | { |
| 318 | //create new visible item |
| 319 | SList<SItemPanel *> *lstRecycle = m_itemRecycle.GetAt(ii.nType); |
| 320 | if(lstRecycle->IsEmpty()) |
| 321 | { |
| 322 | //创建一个新的列表项 |
| 323 | ii.pItem = SItemPanel::Create(this, pugi::xml_node(), this); |
| 324 | ii.pItem->GetEventSet()->subscribeEvent(EventItemPanelClick::EventID,Subscriber(&STileView::OnItemClick,this)); |
| 325 | } |
| 326 | else |
| 327 | { |
nothing calls this directly
no test coverage detected