private static void MoveInGroup(ListViewItem item, int indexInGroup, List<ListViewItem> groupList, int delta, bool focus)
{
if (item.ListView.VirtualMode)
{
throw new InvalidOperationException();
}
ListView listView = item.ListView;
listView.BeginUpdate();
try
{
groupList.Remove(item);
groupList.Insert(indexInGroup + delta, item);
listView.Sort(new ListViewExtender.ListViewGroupIndexComparer(item.Group, groupList));
if (focus)
{
item.Focus(true, true);
}
}
finally
{
listView.EndUpdate();
}
}
private static void Move(ListViewItem item, int delta, bool focus)
{
if (item.ListView.VirtualMode)
{
throw new InvalidOperationException();
}
ListView listView = item.ListView;
listView.BeginUpdate();
try
{
int index = item.Index;
listView.Items.RemoveAt(index);
listView.Items.Insert(index + delta, item);
if (focus)
{
item.Focus(true, true);
}
}
finally
{
listView.EndUpdate();
}
}
