Collapsing a branch


You may have noticed that when you collapse a branch in Explorer and then expand it again later, the effect is that any child branches that were expanded earlier are again expanded. Although, this is mostly helpful, sometimes you want to be able to traverse the outline one level at a time so that you can get the bigger picture before you go on to the detail. We can achieve this programatically by collapsing the main item and then collapsing all its children recursively. Heres the code.
 
// CollapseBranch       - Collapses a branch completely
// hti                  -  Handle of the tree item to collapse
void CTreeCtrlX::CollapseBranch( HTREEITEM hti)
{
        if( ItemHasChildren( hti ) ){
                Expand( hti, TVE_COLLAPSE );
                hti = GetChildItem( hti );
                do{
                        CollapseBranch( hti );
                }while( (hti = GetNextSiblingItem( hti )) != NULL );
        }
}

 



Comments

  • recursive is limited to the size of the stack ???

    Posted by Legacy on 03/15/2002 12:00am

    Originally posted by: D

    but, The number of recursive calls is limited to the size of the stack.
    how to process this problem, if I have many many item?

    Reply
  • Loosing SelectState

    Posted by Legacy on 09/14/1999 12:00am

    Originally posted by: Stephan Heisen

    Hi,

    each time I collaps a branch the Selection Changed Message is send to the parent. How can I prevent that this happens and the items in the branch loose there selectionstate

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • Organizations are increasingly gravitating toward mobile-first application development as they assess the need to revamp their application portfolios to support touch computing and mobility. Consumerization has brought higher expectations for application usability along with the mobile devices themselves. Enterprises are increasingly shifting their new application acquisitions and development efforts toward mobile platforms. With this backdrop, it is natural to expect application platform vendors to invest in …

  • On-demand Event Event Date: June 23, 2015 Business transformation is not just important, it is vital to the success of all organizations in the 21st century marketplace. How IT approaches and executes the move from cost center to revenue contributor will not only transform the IT organization, it will change how companies retain competitive advantage and meet the requirements of internal and external customers. This shift in thinking is not new, but actualizing it is. Check out this eSeminar to learn the …

Most Popular Programming Stories

More for Developers

RSS Feeds

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