VC++,how to expnding certain node in tree control
Author
VC++,how to expnding certain node in tree control(not using TVN_ITEMEXPANDING)?
I just know the path in tree control I want to expand.
Uh, TVM_EXPAND? All you need is the handle to the item, which you may or may not have, but that depends on what exactly you're doing. You can always enumerate nodes with TVM_GETNEXTITEM.
Author
Quote:Original post by Mike nl
Uh, TVM_EXPAND? All you need is the handle to the item, which you may or may not have, but that depends on what exactly you're doing. You can always enumerate nodes with TVM_GETNEXTITEM.
Tank you,Mike. But I have a problem how do I know the value hItem?
I just know the path (in TreeControl) I want to expand (such as A/B/C).
I do not know how to get the hItem of "A/B/C"
Like I said, use TVM_GETNEXTITEM to enumerate the children (flag = TVGN_CHILD) of a node.
This might work. I haven't tested or even tried to compile it, but this might give you an idea.
[Edited by - Mike nl on August 20, 2008 5:09:19 AM]
This might work. I haven't tested or even tried to compile it, but this might give you an idea.
HTREEITEM GetTreeItemByPath(HWND hTree, HTREEITEM hNode, string path){ // Strip the first segment off the path string::size_type pos = path.find_first_of("\\/"); const string name = path.substr(0, pos); if (pos == string::npos) { path.clear(); } else { path.erase(0, pos + 1); } // Only the first 260 chars matter TCHAR buffer[260]; TVITEM item; item.mask = TVIF_TEXT; item.pszText = buffer; item.cchTextMax = 260; // Enumerate the children of the node item.hItem = TreeView_GetChild(hTree, hNode); while (item.hItem != NULL) { // Get the item's text TreeView_GetItem(hTree, &item); // Compare it if (name == buffer) { // Match, find the rest of the path HREEITEM hItem = GetTreeItemByPath(hTree, item.hItem, path); // If duplicates are not possible, you can just return hItem immediately instead of continuing the search. if (hItem != NULL) { return hItem; } } item.hItem = TreeView_GetNextSibling(hTree, item.hItem); } return NULL;}HTREEITEM GetTreeItemByPath(HWND hTree, const string& path){ return GetTreeItemByPath(hTree, TreeView_GetRoot(hTree), path)}[Edited by - Mike nl on August 20, 2008 5:09:19 AM]
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement