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Problem with Tree View

Started by BlueDev Sep 9, 2003 at 8:48 PM 2 replies 750+ views

Original Post

Sep 9, 2003 at 8:48 PM

Hello, I am trying to do a simple task by finding out which item is Selected, more than that, the selected number. For example the first item will be 0, the next 1. I am using the following code so far:

int num;
HWND hWnd, hTree;
HTREEITEM hItem, Selected;

// num equals selected number


hTree = GetDlgItem(hWnd, IDTREE);

Selected=(HTREEITEM)SendMessage(hTree,TVM_GETNEXTITEM,TVGN_CARET,(LPARAM)Selected);
num = TreeView_GetItem(hTree, Selected);

Now when I do that they all come out to be 1 for some reason, maybe cause TreeView_GetItem returns BOOL. Is there a function I can use that will actually work as in the first item selected is 0, the third item 3 and so on? Thank your for your time. - BlueDev

[edited by - BlueDev on September 9, 2003 9:50:49 PM]

Sep 10, 2003 at 2:40 AM

I would be surprised if that even compiles, does it? GetItem expects a pointer to a TV_ITEM structure in order to return information about the item pointed to by the HTREEITEM.

The items are not numbered from 0 upwards as they are in a list box - the HTREEITEM is the unique identifier for each item. If you do really want to number them you can use SetItemData to associate a value with each item, which you will have to do when you insert the items into the tree.

"Absorb what is useful, reject what is useless, and add what is specifically your own." - Lee Jun Fan

BlueDev

Author

BlueDev

Sep 10, 2003 at 12:27 PM

Ok sounds like a good idea, do you know if SetItemData works with Win32 because I saw lots on MFC but I havent goten that far yet. I believe it is possible but no one documents on it, is it truly possible?

- BlueDev

llyod

Sep 10, 2003 at 12:47 PM

Here''s an article on Treeview in pure Win32: clicky

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