* Hoovering over a legend label hightlighs that pie slice
* Change to event bus
* Adds EventBusWithSource to help identify the origin of the event
* Add tests and fix bug with incorrect source
* Clean up PieChart and EventBus a bit
* Fix bug when payload.source is undefined
* Add some documentation and adjust naming
* useState instead of useSetState
* Clean up some more documentation
* Move eventbus to state
* add event bus actions to the debug panel
* add event bus actions to the debug panel
* Try to make the naming a bit clearer
* Try passing eventbus as context
* Fix lint issues
* Move event bus context to panel chrome
* Fix event handler functions
* switch to using useCallback for legend item callbacks
* Remove unused parameters
* Add id to panel fixture of PanelChrome test
* Simplify event source
* Place eventBus inside more generic context
* Push handling of context up the tree to VizLegend
only export usePanelContext and PanelContextProvider
implement isOwnEvent on EventBus
some cleanup
Co-authored-by: Ryan McKinley <ryantxu@gmail.com>
Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>
