1. Mind MappingGadget for Google Wave Mihai Paraschiv

2. Overview Built on GWT Basic user interface The code is more interesting Features: Node: add, edit, remove Link: add, remove

3. Screen shot

4. Architecture MVP Event Bus Components: Model Wave Controller Presenter (+ View)

5. Wave state model Key – value pairs Concept: C + user + id + property = value Properties: name, position Concept id = user + id Link: L + concept 1 + concept 2 = value

6. Problems – Wave state Wave state (for gadgets): Key – value pairs Notifications No guaranteed order No local update Solution: accumulators

7. Problems – GWT + Wave Hard to test Solution: Event Bus MVP

8. Questions