Solved

Nothing showing in CListView

Posted on 1998-03-09
1
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Last Modified: 2013-11-20
Ok, I have a view in my application which is derived from CListView.  Unfortunetly, when I add items to the view, nothing shows up.  The client area remains blank, although resizing the window make scroll bars appear which make it seem like the items are there.  In any case, here is the pertinent code:
/* here is the creation handler...it should be in report view with no column headers */
BOOL CMessageView::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext)
{
      dwStyle |= LVS_REPORT | LVS_NOCOLUMNHEADER | LVS_SINGLESEL;
      return CWnd::Create(lpszClassName, lpszWindowName, dwStyle, rect, pParentWnd, nID, pContext);
}

/*here is the code which inserts an item into the view */
/*my purpose here is to insert the item as the last thing in the control, then scroll down to make sure it can be seen */
void CMessageView::PostMessage(CString str, BOOL mode)
{
      CListCtrl &ctrl = GetListCtrl();
      if (mode == TRUE)
      {
            ctrl.InsertItem(ctrl.GetItemCount(), str.GetBuffer(500));
            ctrl.InsertItem(ctrl.GetItemCount(), "-");
            ctrl.EnsureVisible(ctrl.GetItemCount(), FALSE);
      }
      else
      {
            ctrl.InsertItem(ctrl.GetItemCount(), str.GetBuffer(500));
            ctrl.EnsureVisible(ctrl.GetItemCount(), FALSE);
      }
}

so there it is...very simple. I thought I'd like to at least get the text going before I added a CImageList to it.  Anyone have any idea why it isn't drawing?
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Question by:openGL
1 Comment
 
LVL 11

Accepted Solution

by:
mikeblas earned 70 total points
ID: 1316850
Your code doesn't create any columns. You need to  call CListCtrl::InsertColumn() at least once.

Your code shouldn't call str.GetBuffer() like it does; that's entirely bogus.  Just pass str directly and let the implicit conversion operator take over:

  ctrl.InsertItem(ctrl.GetItemCount(), str);

.B ekiM
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