void _handleFlightEnded(_HeroFlight flight)
{
this._flights.Remove(flight.manifest.tag);
}
void _startHeroTransition(
PageRoute from,
PageRoute to,
Animation <float> animation,
HeroFlightDirection flightType,
bool isUserGestureTransition
)
{
if (navigator == null || from.subtreeContext == null || to.subtreeContext == null)
{
to.offstage = false; // in case we set this in _maybeStartHeroTransition
return;
}
Rect navigatorRect = HeroUtils._boundingBoxFor(navigator.context);//_globalBoundingBoxFor(navigator.context);
Dictionary <object, _HeroState> fromHeroes =
Hero._allHeroesFor(from.subtreeContext, isUserGestureTransition, navigator);
Dictionary <object, _HeroState> toHeroes =
Hero._allHeroesFor(to.subtreeContext, isUserGestureTransition, navigator);
to.offstage = false;
foreach (object tag in fromHeroes.Keys)
{
if (toHeroes.ContainsKey(tag))
{
HeroFlightShuttleBuilder fromShuttleBuilder = fromHeroes[tag].widget.flightShuttleBuilder;
HeroFlightShuttleBuilder toShuttleBuilder = toHeroes[tag].widget.flightShuttleBuilder;
bool isDiverted = _flights.ContainsKey(tag);
_HeroFlightManifest manifest = new _HeroFlightManifest(
type: flightType,
overlay: navigator.overlay,
navigatorRect: navigatorRect,
fromRoute: from,
toRoute: to,
fromHero: fromHeroes[tag],
toHero: toHeroes[tag],
createRectTween: createRectTween,
shuttleBuilder:
toShuttleBuilder ?? fromShuttleBuilder ?? _defaultHeroFlightShuttleBuilder,
isUserGestureTransition: isUserGestureTransition,
isDiverted: isDiverted
);
//if (_flights.TryGetValue(tag, out var result)) {
if (isDiverted)
{
_flights[tag].divert(manifest);
}
else
{
_flights[tag] = new _HeroFlight(_handleFlightEnded);
_flights[tag].start(manifest);
}
}
else if (_flights.TryGetValue(tag, out var result))
{
result.abort();
}
}
foreach (object tag in toHeroes.Keys)
{
_HeroState heroState = null;
if (!fromHeroes.TryGetValue(tag, out heroState))
{
toHeroes[tag].ensurePlaceholderIsHidden();
}
}
}
