private void TreeControl_NodeExpandedChanged(object sender, TreeControl.NodeEventArgs e)
{
var treeView = TreeView.As<FilteredTreeView>();
// early exit
if (m_updating || !m_searching || e.Node.Tag == null
|| treeView == null) return;
if(m_toExpand != null)
{
var node = m_toExpand;
m_toExpand = null;
try
{
m_updating = true;
TreeControlAdapter.Expand(node.Tag);
treeView.RestoreExpansion(e.Node, TreeControlAdapter);
}
finally
{
m_updating = false;
}
}
else if(e.Node.Expanded && RestoreSubExpansion)
{
treeView.RestoreExpansion(e.Node, TreeControlAdapter);
}
}
private void TreeControl_NodeExpandedChanging(object sender, TreeControl.CancelNodeEventArgs e)
{
var treeView = TreeView.As<FilteredTreeView>();
// early exit
if (m_updating || !m_searching || e.Node.Tag == null
|| treeView == null) return;
// is the node or any of its decendants passed filter
if (treeView.IsMatched(e.Node.Tag))
{
if (e.Node.Expanded)
{
if (!treeView.IsFullyExpaned(e.Node.Tag))
{
// add all the children that did not pass
// the filtering to the exempted set.
treeView.AddToExemptSet(e.Node.Tag);
// save e.Node and expand it in NodeExpandedChanged event handler.
m_toExpand = e.Node;
}
if (RestoreSubExpansion)
treeView.SaveExpansion(e.Node);
} // end of if (e.Node.Expanded )
else
{ // e.Node about to expand. Remove all its children from exempted set.
// so normal filtering will be applied.
treeView.RemoveFromExemptSet(e.Node.Tag);
}
}// end of if(treeView.IsMatched(e.Node.Tag))
else
{
if(e.Node.Expanded)
{
if (RestoreSubExpansion)
treeView.SaveExpansion(e.Node);
}
else
{
treeView.AddToExemptSet(e.Node.Tag);
}
}
}
