perfect, thank you very much On 1月4日, 下午4时22分, Y2i <[email protected]> wrote: > updateRowData()/updateRowCount() needs to be called on the data > provider, not on the cell tree. > > - You first create a cell tree, passing a tree model to the cell tree > constructor. > - The tree model will be creating node info nodes in > TreeViewModel.getNodeInfo() > - DefaultNodeInfo takes an instance of a data provider for its > constructor > - The data provider initiates an RPC call > - When the data provider receives results back, it updates ITSELF, not > the tree > > Take a look at the showcase code for more > detailshttp://gwt.google.com/samples/Showcase/Showcase.html#!CwCellTree > > On Jan 3, 11:30 pm, yeti <[email protected]> wrote: > > > > > > > > > Thank you Y2i, Your messages are greatly help to me > > > But there is an another problem stuck in... updataRowCount() and > > updataRowData should work with hasData, but cellTree doesnt implement > > it, so my requestion is, as to cellTree, how do both functions above > > work? > > > On 2010年12月30日, 下午12时39分, Y2i <[email protected]> wrote: > > > > It can be populated dynamically. Please take a look at this post: > > > >http://groups.google.com/group/google-web-toolkit/msg/6a8f18668f046cc6 > > > > When the data provider receives results back it needs to populate > > > itself by calling > > > > updateRowCount() > > > updateRowData() > > > > On Dec 29, 7:12 pm, yeti <[email protected]> wrote: > > > > > Hi , > > > > > I wonder if celltree can be built dynamically... getNodeInfo is > > > > synchronous, so how to work with a asynchronous, that is , get node > > > > info via a request? > > > > > Someone said, > > > > > "pass a ListDataProvider or AsyncDataProvider into DefaultNodeInfo. > > > > Then you can return the NodeInfo synchronously, but populate the data > > > > provider asynchronously. " > > > > > Is it right when I return defaultNodeinfo , it will wait me to > > > > populate the dataprovider? > > > > > if not, could anyone show me more details? > > > > > thanks in advance
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