void OnItemExpanding(EShellTreeItem& tItem)
{
//LPNMTREEVIEW pnmtv = (LPNMTREEVIEW) pnmh;
#ifdef __ATLCTRLX_H__
CWaitCursor cursor;
#endif
// 展开过就去掉“没展开”属性
tItem.remove_attribute("not-expand-ever");
// 删掉占位的那个项目
EShellTreeItem tiFake = tItem.find_first("option");
if (tiFake.is_valid())
{
tiFake.destroy();
}
// 遍历目录下的子文件夹
PSHELLITEMINFO pFolderItem = reinterpret_cast<PSHELLITEMINFO>(tItem.GetData());
CComPtr<IShellFolder> spFolder;
if( pFolderItem->pidlNode != NULL )
{
if( FAILED(pFolderItem->spFolder->BindToObject(pFolderItem->pidlNode,
NULL, IID_IShellFolder, (LPVOID*)&spFolder)) )
return ;
}
else
{
spFolder = pFolderItem->spFolder;
}
// Add children
CComPtr<IEnumIDList> spEnum;
DWORD dwEnumFlags = SHCONTF_FOLDERS;
if( (m_dwShellStyle & SCT_EX_SHOWHIDDEN) != 0 )
dwEnumFlags |= SHCONTF_INCLUDEHIDDEN;
if( SUCCEEDED(spFolder->EnumObjects(NULL, dwEnumFlags, &spEnum)) )
{
CPidl pidl;
DWORD dwFetched;
while( (spEnum->Next(1, &pidl, &dwFetched) == S_OK) && (dwFetched > 0) )
{
// Get attributes and filter some items
DWORD dwAttribs = SFGAO_DISPLAYATTRMASK | SFGAO_HASSUBFOLDER;
if( !_FilterItem(spFolder, pidl, dwAttribs) )
{
_InsertItem(spFolder, pFolderItem->pidlFull, pidl, dwAttribs, tItem);
}
pidl.Delete();
}
}
}
