private void OnCategoriesBeforeCollapse(object sender, BeforeCollapseEventArgs e)
{
e.CanCollapse = e.Node.Tag is SearchGroup;
}
private void treeView_BeforeCollapse(object sender, BeforeCollapseEventArgs e)
{
// Never allow the root to be collapsed.
if (e.Node.ParentNode == null)
{
e.CanCollapse = false;
}
else
{
protectDoubleClickOnNode(e);
}
}
void tree_BeforeCollapse(object sender, BeforeCollapseEventArgs e)
{
(sender as TreeList).FocusedNode = e.Node;
}
private void protectDoubleClickOnNode(
BeforeCollapseEventArgs e)
{
// Avoid expanding/collapsing upon double click.
if (treeView.WasDoubleClick)
{
e.CanCollapse = false;
treeView.WasDoubleClick = false;
}
}
