Currently working on a proof of concept with Ext-GWT. Current usability scenario involves using the TreeGrid to manage add/edit/delete (using a context menu) of a Hierarchy model using the TreeGrid control. The TreeGrid uses lazy loading to load the children using a loader.
We ran into a couple of issues with the above functionality with the TreeGrid.
1. Using a row editor on the tree grid, we could not calculate the right row to show the edit part -