Other & summary
Congratulations! You created quite an application with just around 200 lines of JavaScript; and that includes plenty of comments and whitespace.
GeoExt still has more to offer.
We couldn't talk about legends in the tree, the super useful GeoExt.OlObject
-class or the PrintProvider
which allows you to serialize your map to a format understandable by the superb Mapfish Print Servlet (v3).
Make sure to checkout all examples, the API documentation (also available with ExtJS-classes) and the code on github.
The source for this workshop is also on github. If you find an error or outdated section, just open an issue or — even better — provide us with a pull request.
We hope you like what you have learned.