Re: CListView with checkbox problem

From:

=?Utf-8?B?OTc2MTI=?= <97612@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Mon, 16 Feb 2009 18:12:11 -0800

Message-ID:

<D80A4D57-F38E-4E3B-8561-254D852B9EE9@microsoft.com>

I got another problem. When I click a thumbnail image, the
"hitinfo.flags != LVHT_ONITEMSTATEICON" still true, and the program
returned. I don't know if I use the wrong way?

Below is my source code:
void CThumbView::OnLvnItemchanged(NMHDR *pNMHDR, LRESULT *pResult)
{
    LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);
    // TODO: Add your control notification handler code here
    CListCtrl& ListCtrl = GetListCtrl();
    LVHITTESTINFO hitinfo;
    *pResult = 0;

    //Copy click point
    hitinfo.pt = pNMLV->ptAction;

    //Make the hit test...
    int nItem = ListCtrl.HitTest(&hitinfo);
    //No click on image item, return
    if(hitinfo.flags != LVHT_ONITEMSTATEICON)
        return;

    //Image item hit
    CePhotoSyncDoc* pDoc = (CePhotoSyncDoc*)GetDocument();
    ASSERT_VALID(pDoc);
    pDoc->SelectItem( pNMLV->iItem );
    pDoc->UpdateAllViews(this, UPDATE_PREVIEW);
}

"97612" wrote:

Thanks for your help, it works.

Thanks a lot.

"Tom Serface" wrote:

You could check if the user clicked on the state icon:

NMLISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
LVHITTESTINFO hitinfo;
*pResult = 0;

//Copy click point
hitinfo.pt = pNMListView->ptAction;

//Make the hit test...
int nItem = m_cList.HitTest(&hitinfo);

if(hitinfo.flags != LVHT_ONITEMSTATEICON)
return; // Didn't click on an icon

Tom

"97612" <97612@discussions.microsoft.com> wrote in message
news:5FA84CE6-E121-4AE9-8AC8-C3D3C6B6A0D3@microsoft.com...

I use CListView to draw the thumbnail of a image list. And I want to add
the
checkbox for the image list. When I select a thumbnail, the CListView will
trigger the "OnLvnItemchanged" event to let another view to show the
preview
image of the selected image.
My problem is that when I use
"ListCtrl.SetExtendedStyle(ListCtrl.GetStyle()|LVS_EX_CHECKBOXES )", the
"OnLvnItemchanged" is trigger by the initial operation for checkbox. This
is
not I expected, how can I solve the problem?

Thanks for your help.