internal bool OnBeforeMultiSelect(TreeNodeAdv node)
{
var args = new TreeViewAdvCancelEventArgs(node)
{
Cancel = false
};
BeforeMultiSelect?.Invoke(this, args);
return(!args.Cancel);
}
bool OnBeforeSelectedNodesChange(ImmutableHashSet <TreeNode> nodes)
{
IReadOnlyCollection <TreeNode> orderedNodes;
var primary = GetPrimarySelectedNode(nodes);
if (primary != null)
{
orderedNodes = Enumerable.Union(new[] { primary }, nodes.Remove(primary)).ToArray();
}
else
{
orderedNodes = nodes;
}
var evt = new TreeViewMultiNodeCancelEventArgs(orderedNodes, false);
BeforeMultiSelect?.Invoke(this, evt);
return(!evt.Cancel);
}