+ // Get the Buffer ID of the target buffer
+ BufferId bufferId1 = index.data(NetworkModel::BufferIdRole).value<BufferId>();
+
+ // If the source and target are the same buffer, this was an aborted rearrangement
+ if (bufferId1 == bufferId2)
+ return TreeViewTouch::dropEvent(event);
+
+ // Get index of buffer that was being dragged
+ QModelIndex index2 = Client::networkModel()->bufferIndex(bufferId2);
+
+ // If the buffer being dragged is a channel and we're still joined to it, treat this as a rearrangement
+ // This prevents us from being joined to a channel with no associated UI elements
+ if (index2.data(NetworkModel::BufferTypeRole) == BufferInfo::ChannelBuffer && index2.data(NetworkModel::ItemActiveRole) == true)