Get last item in branch


In my programming, I have often had to derive the last item in a branch. In fact some of the other topics I cover, uses this function to get the last item in the branch.
 
// GetLastItem  - Gets last item in the branch
// Returns      - Last item
// hItem        - Node identifying the branch. NULL will 
//                return the last item in outine
HTREEITEM CTreeCtrlX::GetLastItem( HTREEITEM hItem )
{
        // Last child of the last child of the last child ...
        HTREEITEM htiNext;

        if( hItem == NULL ){
                // Get the last item at the top level
                htiNext = GetRootItem();
                while( htiNext ){
                        hItem = htiNext;
                        htiNext = GetNextSiblingItem( htiNext );
                }
        }

        while( ItemHasChildren( hItem ) ){
                htiNext = GetChildItem( hItem );
                while( htiNext ){
                        hItem = htiNext;
                        htiNext = GetNextSiblingItem( htiNext );
                }
        }

        return hItem;
}



Comments

  • Little problem ???

    Posted by Legacy on 11/05/1998 12:00am

    Originally posted by: Patrice Lacroix

    I believe I found a problem in this method.
    
    

    Please correct me if I'm wrong or if I am not using this method correctly.

    If I am searching for a string in the tree and this string is
    currently selected, the method will return NULL.

    Should I check before I call the method ?

    Here is what I did to correct it:

    // For the first pass, set the current item equal to the selection
    HTREEITEM htiSel = hItem ? hItem : GetSelectedItem();
    HTREEITEM htiCur = htiSel;

    ...
    ...
    // For the first pass only, we check to see if it
    // is the item we're looking for.
    BOOL bFirstPass = TRUE;

    while( htiCur && (htiCur != htiSel || bFirstPass) )
    {
    bFirstPass = FALSE;
    ...
    ...
    ...
    }

    ...
    ...
    ...

    Please, tell me if you have a better way to do it.

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Lenovo recommends Windows 8 Pro. "I dropped my laptop getting out of the taxi." This probably sounds familiar to most IT professionals. If your employees are traveling, you know their devices are in for a rough go. Whether it's a trip to the conference room or a convention out of town, any time equipment leaves a user's desk it is at risk of being put into harm's way. Stay connected at all times, whether at the office or on the go, with agile, durable, and flexible devices like the Lenovo® …

  • Live Event Date: September 23, 2015 @ 1:00 p.m. ET / 10:00 a.m. PT The cloud is not just about a runtime platform for your projects – now, you can do your development in the cloud, too. Check out this upcoming eseminar to learn how the cloud improves your development experience and team collaboration. Join Dana Singleterry, Principal Product Manager for Oracle Dev Tools, as he discusses how to simplify every aspect of the development lifecycle, including requirements gathering, version management, code …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date