Selecting and deselecting a range of rows


The list box control class has a selection function SelItemRange(). This function, though missing in the CListCtrl class, is easily implemented.
// SelItemRange - Selects/Deselect a range of items
// Returns              - The number of new items selected
// bSelect              - TRUE to select, FALSE to deselect
// nFirstItem           - index of first item to select
// nLastItem            - index of last item to select
int CMyListCtrl::SelItemRange(BOOL bSelect, int nFirstItem, int nLastItem)
{
        // make sure nFirstItem and nLastItem are valid
        if( nFirstItem >= GetItemCount() || nLastItem >= GetItemCount() )
                return 0;

        int nItemsSelected = 0;
        int nFlags = bSelect ? 0 : LVNI_SELECTED;
        int nItem = nFirstItem - 1;
        while( (nItem = GetNextItem( nItem, nFlags )) >=0
                        && nItem <= nLastItem )
        {
                nItemsSelected++;
                SetItemState(nItem, bSelect ? LVIS_SELECTED : 0, LVIS_SELECTED );
        }
        return nItemsSelected;
}



Comments

  • Selecting all items quickly

    Posted by Legacy on 05/13/1999 12:00am

    Originally posted by: Phil Hall

    This will select all items the quickest way possible:
    
    


    void CMyListCtrl::SelectAllItems()
    {
    LV_ITEM theItem;

    theItem.mask = LVIF_STATE;
    theItem.iItem = -1;
    theItem.iSubItem = 0;
    theItem.state = LVIS_SELECTED;
    theItem.stateMask = 2;

    this->SetItemState(-1, &theItem);

    return;
    }

    Reply
  • Selecting multiple rows in a List control

    Posted by Legacy on 02/05/1999 12:00am

    Originally posted by: Kammie Dill

    I have a list control with over 100,000 items in it. I would like for the user of the app to be able to select all the items at once. I have provided a button on the toolbar for this, but the only way I know how to select all of the items is by looping through all 100,000 and setting the "select" state. This takes a long time and the screen flashes until all are selected. Is there a better way to do this?

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • Learn How A Global Entertainment Company Saw a 448% ROI Every business today uses software to manage systems, deliver products, and empower employees to do their jobs. But software inevitably breaks, and when it does, businesses lose money -- in the form of dissatisfied customers, missed SLAs or lost productivity. PagerDuty, an operations performance platform, solves this problem by helping operations engineers and developers more effectively manage and resolve incidents across a company's global operations. …

  • Today's agile organizations pose operations teams with a tremendous challenge: to deploy new releases to production immediately after development and testing is completed. To ensure that applications are deployed successfully, an automatic and transparent process is required. We refer to this process as Zero Touch Deployment™. This white paper reviews two approaches to Zero Touch Deployment--a script-based solution and a release automation platform. The article discusses how each can solve the key …

Most Popular Programming Stories

More for Developers

RSS Feeds