Codejock Developer Community : How to deselect items in tree control http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 13 May 2026 04:22:25 +0000 Thu, 30 Jan 2014 11:39:43 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=22185 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[How to deselect items in tree control : Hi, I&#039;ve seen that I can...]]> http://forum.codejock.com/forum_posts.asp?TID=22185&PID=72221&title=how-to-deselect-items-in-tree-control#72221 Author: Norbini
Subject: 22185
Posted: 30 January 2014 at 11:39am

Hi,

  I've seen that I can select items in a multi-select tree control using SelectItem() or SelectItems(), but what is the correct way to deselect items?

  I guess it is possible to do (in pseudocode):
    CTypedPtrList<CPtrList, HTREEITEM> CurrentSelection;
    GetSelectedItems(CurrentSelection);   // Get the list of currently selected items
    SelectAll(FALSE, NULL); // Deselect all items
    for (PreviouslySelectedItem in CurrentSelection) {
        if (PreviouslySelectedItem != ItemToDeselect) {
            SelectItem(PreviouslySelectedItem); // Select all previously selected items except the item to deselect
        }
    }

  However, I suspect this will generate a large number of TVN_SELCHANGED messages and probably make the selection flicker.

  Is there a better way that I'm missing or would this approach be ok?

  Many thanks in advance,
    -Nige
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