VitNX_ListView.OnKeyDown Method

protected override void OnKeyDown(KeyEventArgs e)
 {
     base.OnKeyDown(e);
 
     if (Items.Count == 0)
         return;
 
     if (e.KeyCode != Keys.Down && e.KeyCode != Keys.Up)
         return;
 
     if (MultiSelect && ModifierKeys == Keys.Shift)
     {
         if (e.KeyCode == Keys.Up)
         {
             if (_anchoredItemEnd - 1 >= 0)
             {
                 SelectAnchoredRange(_anchoredItemEnd - 1);
                 EnsureVisible();
             }
         }
         else if (e.KeyCode == Keys.Down)
         {
             if (_anchoredItemEnd + 1 <= Items.Count - 1)
             {
                 SelectAnchoredRange(_anchoredItemEnd + 1);
             }
         }
     }
     else
     {
         if (e.KeyCode == Keys.Up)
         {
             if (_anchoredItemEnd - 1 >= 0)
                 SelectItem(_anchoredItemEnd - 1);
         }
         else if (e.KeyCode == Keys.Down)
         {
             if (_anchoredItemEnd + 1 <= Items.Count - 1)
                 SelectItem(_anchoredItemEnd + 1);
         }
     }
 
     EnsureVisible();
 }