Hi all, I'm currently implementing a tree in a GWT application which shows a large amout of data (hence the CellTree rather than the widget based Tree) and which is loaded asynchronously via AsyncDataProvider.
The application has to modify the tree, i.e. add new nodes, update the text of exiting nodes and remove nodes. I haven't been able to find an appropriate API exposed by the CellTree or its TreeViewModel that could help with traversing the tree or modifying data. I have seen CellTreeNodeView or CellTreeNodeView.TreeNode, but they are either not allowing modification or have package only visibility. The posts I've found were inconclusive. My current work-around is to construct a parallel tree structure (by extending TreeViewModel.DefaultNodeInfo) in the TreeViewModel to provide appropriate methods. This is quite cumbersome and defies a bit the purpose of a lightweight tree as most of this information is already kept in GWT-internal classes. >From this extended DefaultNodeInfo, I managed to update a tree node by invoking display.setRowData() and appending a child via display.setRowData() and display.setRowCount(). When trying to delete a node via setRowData() and setRowCount(), the node gets removed, but the SingleSelectionModel attached to the CellTree doesn't work anymore afterwards. My questions are: - What is the proposed way to modify a CellTree? I hope the GWT devs have thought of it but I haven't found it. - What is the correct way of updating a HasData display, especially how can rows be removed? Thanks for your help, Thomas -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
