I have a treepanel with a treestore and a model. I cannot use any of the standard proxies, so I have to write my own. What methods do I have to implement for my own proxy, the tree will be read only.
You should look at the source code of Ext.data.proxy.Proxy, Ext.data.proxy.Server, Ext.data.proxy.Ajax. If you have the intention of writing your own reader, you also need to look at Ext.data.reader.Reader, Ext.data.reader.Json, etc. I wonder what your requirements are? Why can't you use standard proxies?