* Added possibility to provide custom header back button's image, introduced API changes: removed old prop "headerBackImage", added new prop "backImage".
* Code style fixes.
* Renamed showcase file to for more clarity; updated the prop's name as well.
* Removed listeners code from showcase screens.
* wip
* fix imports
* use stylesheet for margin
stylesheet now correct
* also remove old headerLeft
* improve header buttons color
* remove ios button margin
* Add dismiss action, made possible by getParentState
* Add dismiss to flow interface
* Don't dispatch an action on dismiss helper if no parent state
* carefullyGetParent instead of getParentState
* Lazy initialization of tabs and move contents off-screen when not active
* Make subview clipping and lazy both configurable
* Record snapshots again
* Update type definition
* Remove unused log
Previously the state was getting squashed, in this case it would destroy the routeName of the state, which was a route for the parent navigator, who could no longer render properly.
* Add Flow libdef
* Move libdef to flow folder in root
* Update libdef with some refinements discovered while writing test
Mostly refining navigator config types. In the past when we tried it we got in-repo Flow errors. With a libdef we can now assert it as true!
* Get rid of all imports in libdef and refine some types
In order to make sure that contributors don't making breaking changes to our Flow types without corresponding updates to the libdefs, we should make sure these breaking changes get caught by CI. Right now our libdefs are any-typed, but I'll put up a PR later that will refine the libdef (located at `flow-typed/npm/react-navigation_vx.x.x.js`).
* Fix SimpleTabs types
dca37627a243b191fda5856aa6ce9eb1ee4957cf broke the types, but it wasn't noticed because Flow wasn't in the CI. This fixes the types; separate PR coming to add Flow to the CI.
* Refine type of NavigationEventListener callback
Instead of typing the callback as `Function`, we're now using the precise type provided by @ericvicenti
* NavigationEventListener -> NavigationEventSubscription
* Add fbemitter, keep flow passing
* Begin support for event emitter
- Adds emitter to navigation prop
- Emits top level onAction event
- stub getChildEventSubscriber for child events
* Support navigationState.isNavigating
* Focus and blur events starting to work
- Navigation completion action wired up
- Event chaining logic built in getChildEventSubscriber
- Renamed onAction evt to ‘action’
* Wrap up events progress and testing
* Rename to isTransitioning and COMPLETE_TRANSITION
* rm accidental dependency
* Suppoert event payload type
