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