Automatically resorting after an edit


The only time the list view control does some sorting is when inserting an item into the list. Then too, the control should have the LVS_SORTASCENDING  or the LVS_SORTDESCENDING  style. The new item is inserted in its proper place and the other items remain in the same relative order. If the user edits an item, the list view has to be explicitly sorted to maintain the order. To achieve this, the resort code has to be initiated from the LVN_ENDLABELEDIT handler. The code below uses the SortTextItems() function covered in a previous section. If the sorting is based on anything other that the text, then the SortItems() function should be used for sorting.
 
void CMyListCtrl::OnEndLabelEdit(NMHDR* pNMHDR, LRESULT* pResult)
{
        LV_DISPINFO  *plvDispInfo = (LV_DISPINFO *)pNMHDR;
        LV_ITEM          *plvItem = &plvDispInfo->item;


        if (plvItem->pszText != NULL)
        {
                SetItemText(plvItem->iItem, plvItem->iSubItem, plvItem->pszText);
                SortTextItems( 0, TRUE );
        }
        *pResult = FALSE;
}
There are two things that should be noted. First, the item is updated using SetItemText() before calling the sorting function. If this were not done, the sorting routing see only the old data. Second, we set *pResult to FALSE. This is important. Setting a TRUE value tell Windows that the editing change should be accepted, but the row that was edited is now probably occupied by another row and it is this row that will get updated.
 



Comments

  • There are no comments yet. Be the first to comment!

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • Microsoft® Office 365 is a top choice for enterprises that want a cloud-based suite of productivity/ collaboration applications. With Office 365, you get access to Microsoft™ Office solutions practically anytime, anywhere, on virtually any device. It's a great option for current Microsoft users who can now build on their experience with Microsoft™ solutions while enjoying the flexibility of a cloud-based delivery. But even organizations with no previous investment in Microsoft will find that …

  • Enterprises are typically overwhelmed with incredible volumes of alerts that lack context and are not easily correlated across their technology stacks and silos. It can be incredibly challenging for large enterprises to detect and resolve incidents across multiple environments. When enterprises do detect challenges, communicating and acting efficiently through the right tools can be a daunting proposition. IT teams can provide real value if they collaborate and use agile methods for enterprise DevOps to move …

Most Popular Programming Stories

More for Developers

RSS Feeds

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