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winapimfccomctl32

List control LVM_SETTOPINDEX needed

The list-view control has the LVM_GETTOPINDEX message that allows to get the index of the topmost visible item.

Now I need to set the topmost visible item, but surprisingly there is no LVM_SETTOPINDEX message which would be natural.

Is there an easy clean way to set the topmost item?

My list-control is always in report mode.

Solution

  • This function does the job:

    void SetTopIndex(CListCtrl & listctrl, int topindex)
{
  int actualtopindex = listctrl.GetTopIndex();
  int horspacing;
  int lineheight;
  listctrl.GetItemSpacing(TRUE, &horspacing, &lineheight);

  CSize scrollsize(0, (topindex - actualtopindex) * lineheight);
  listctrl.Scroll(scrollsize);
}

    No parameter sanitation is done here.

    Thanks to David Heffernan and Remy Lebeau for giving me the idea.