protected override void CommandUpdate(object target, CommandInfo cinfo)
{
NodeCommandHandler nc = (NodeCommandHandler)target;
base.CommandUpdate(target, cinfo);
if (nc.MultipleSelectedNodes)
{
bool allowMulti = false;
ICommandUpdateHandler h = ((ICommandUpdateHandler)this).Next;
while (h != null)
{
if (h is AllowMultiSelectionAttribute)
{
allowMulti = true;
break;
}
h = h.Next;
}
if (!allowMulti)
{
cinfo.Enabled = false;
}
}
}
public void AddCustomHandlers (ICommandUpdateHandler handlerChain, ICommandArrayUpdateHandler arrayHandlerChain)
{
this.customHandlerChain = handlerChain;
this.customArrayHandlerChain = arrayHandlerChain;
}
ICommandUpdateHandler ChainHandler (ICommandUpdateHandler chain, object attr)
{
ICommandUpdateHandler h = attr as ICommandUpdateHandler;
if (h == null) return chain;
h.Next = chain ?? DefaultCommandHandler.Instance;
return h;
}
