public bool HandleNodeKeyDown(JetListViewNode viewNode, KeyEventArgs e)
{
if (e.KeyCode == Keys.Subtract || e.KeyCode == Keys.Left)
{
_groupCollection.GetNodeGroupHeader(viewNode).Expanded = false;
return(true);
}
return(false);
}
public bool MoveNext()
{
if (_onHeaderNode)
{
if (_moveDirection == MoveDirection.Up)
{
if (_lastHeaderNode)
{
return(false);
}
JetListViewNode groupNode = (JetListViewNode)_baseEnumerator.Current;
string newGroup = _groupCollection.GroupProvider.GetGroupName(groupNode.Data);
if (newGroup == null)
{
throw new InvalidOperationException("Group provider returned null group name for object " + groupNode.Data);
}
_curHeaderNode = _groupCollection.GetGroupHeader(newGroup);
}
if (_curHeaderNode.Expanded)
{
_onHeaderNode = false;
return(true);
}
if (!SkipCollapsedGroup())
{
if (_moveDirection == MoveDirection.Up)
{
_lastHeaderNode = true;
return(true);
}
return(false);
}
}
else
{
if (!_baseEnumerator.MoveNext())
{
if (_moveDirection == MoveDirection.Up)
{
_onHeaderNode = true;
_lastHeaderNode = true;
return(true);
}
return(false);
}
}
JetListViewNode curNode = (JetListViewNode)_baseEnumerator.Current;
GroupHeaderNode newHeaderNode = _groupCollection.GetNodeGroupHeader(curNode);
if (newHeaderNode != _curHeaderNode)
{
if (_curHeaderNode == null && _moveDirection == MoveDirection.Up)
{
_curHeaderNode = newHeaderNode;
}
else
{
if (_moveDirection == MoveDirection.Down)
{
_curHeaderNode = newHeaderNode;
// if we're enumerating from middle of a group, we can't overwrite topNode
if (!_skipFirstGroupHeader || _curHeaderNode.TopNode == null)
{
_curHeaderNode.TopNode = curNode;
}
}
if (_skipFirstGroupHeader)
{
_skipFirstGroupHeader = false;
}
else
{
_onHeaderNode = true;
}
}
}
return(true);
}