treeview directory/file list

Essentially, I'm asking the same question that was asked way back in this thread. The one reply in that thread makes my eyes hurt, so I really hope someone gives me a better answer.

Is there a quick way to create a tree view that lists the directories on a hard drive? Or do you have to do it all manually (ie, with FindFirstFile/FindNextFile)

You could alternatively use an invisible listbox to list files and directories(msdn example) and then just fill your listview from its contents. You'd still be left with a little fiddling to do, like converting to long path names and differentiating between files and directories from the listbox contents.

Well I started working on this and I decided to try to use FindFirst/NextFile. What I was thinking was I would fill the tree with all the folders in the C drive, then fill those folders with the ones inside them. Each time the user expanded a directory, I figure, I could fill those folders and so forth (if that makes any sense).

The problem I'm having is handling the TVM_ITEMEXPANDING notification. I tried this:

Code:

---

case WM_NOTIFY: //handle treeview messages
    {
      if(wParam==ID_BROWSE_TREE)
      {
        LPNMHDR nm = (LPNMHDR)lParam;
        if  (nm->code==TVN_ITEMEXPANDING)
        {
          LPNMTREEVIEW nmtv = (LPNMTREEVIEW)lParam;
          MessageBox(NULL,nmtv->itemNew.pszText,"Test",MB_OK);
               
        }
      }
    }

---

But there's no text in the message box :confused:

So it seems it's more complicated than just doing that :rolleyes: I used TreeView_GetItem to get it to work:

Code:

---

TVITEM parent;
          char buf[MAX_PATH];
          parent.hItem = nmtv->itemNew.hItem;
          parent.mask = TVIF_TEXT;
          parent.pszText = buf;
          parent.cchTextMax = MAX_PATH;
          TreeView_GetItem(hTree,&parent);

---

My directory tree view now works great, except I need to handle folders collapsing and delete sub-folders (or I get duplicates). Hopefully I wont have any serious issues when I do that :p

Quote:

---

Originally Posted by WiBJa

But there's no text in the message box

---

Quote:

---

Originally Posted by MSDN TVN_ITEMEXPANDING

The itemNew member is a TVITEM structure that contains valid information about the parent item in the hItem, state, and lParam members.

---

If you need the text, you will have to call TreeView_GetItem with the appropriate mask.

There is a Win32 Shell Tree-View at CodeProject.

Whoa you posted almost exactly as I did...weird

What are the chances of that? :eek: