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();
}
}
}
public void start(_HeroFlightManifest initialManifest)
{
D.assert(!this._aborted);
D.assert(() => {
Animation <float> initial = initialManifest.animation;
D.assert(initial != null);
HeroFlightDirection type = initialManifest.type;
switch (type)
{
case HeroFlightDirection.pop:
return(initial.value == 1.0f && initialManifest.isUserGestureTransition
? initial.status == AnimationStatus.completed
: initial.status == AnimationStatus.reverse);
case HeroFlightDirection.push:
return(initial.value == 0.0f && initial.status == AnimationStatus.forward);
}
throw new Exception("Unknown type: " + type);
});
this.manifest = initialManifest;
if (this.manifest.type == HeroFlightDirection.pop)
{
this._proxyAnimation.parent = new ReverseAnimation(this.manifest.animation);
}
else
{
this._proxyAnimation.parent = this.manifest.animation;
}
this.manifest.fromHero.startFlight();
this.manifest.toHero.startFlight();
this.heroRectTween = this._doCreateRectTween(
HeroUtils._globalBoundingBoxFor(this.manifest.fromHero.context),
HeroUtils._globalBoundingBoxFor(this.manifest.toHero.context)
);
this.overlayEntry = new OverlayEntry(builder: this._buildOverlay);
this.manifest.overlay.insert(this.overlayEntry);
}
public void divert(_HeroFlightManifest newManifest)
{
D.assert(this.manifest.tag == newManifest.tag);
if (this.manifest.type == HeroFlightDirection.push && newManifest.type == HeroFlightDirection.pop)
{
D.assert(newManifest.animation.status == AnimationStatus.reverse);
D.assert(this.manifest.fromHero == newManifest.toHero);
D.assert(this.manifest.toHero == newManifest.fromHero);
D.assert(this.manifest.fromRoute == newManifest.toRoute);
D.assert(this.manifest.toRoute == newManifest.fromRoute);
this._proxyAnimation.parent = new ReverseAnimation(newManifest.animation);
this.heroRectTween = new ReverseTween <Rect>(this.heroRectTween);
}
else if (this.manifest.type == HeroFlightDirection.pop && newManifest.type == HeroFlightDirection.push)
{
D.assert(newManifest.animation.status == AnimationStatus.forward);
D.assert(this.manifest.toHero == newManifest.fromHero);
D.assert(this.manifest.toRoute == newManifest.fromRoute);
this._proxyAnimation.parent = newManifest.animation.drive(
new FloatTween(
begin: this.manifest.animation.value,
end: 1.0f
)
);
if (this.manifest.fromHero != newManifest.toHero)
{
this.manifest.fromHero.endFlight();
newManifest.toHero.startFlight();
this.heroRectTween = this._doCreateRectTween(this.heroRectTween.end,
HeroUtils._globalBoundingBoxFor(newManifest.toHero.context));
}
else
{
this.heroRectTween = this._doCreateRectTween(this.heroRectTween.end, this.heroRectTween.begin);
}
}
else
{
D.assert(this.manifest.fromHero != newManifest.fromHero);
D.assert(this.manifest.toHero != newManifest.toHero);
this.heroRectTween = this._doCreateRectTween(this.heroRectTween.evaluate(this._proxyAnimation),
HeroUtils._globalBoundingBoxFor(newManifest.toHero.context));
this.shuttle = null;
if (newManifest.type == HeroFlightDirection.pop)
{
this._proxyAnimation.parent = new ReverseAnimation(newManifest.animation);
}
else
{
this._proxyAnimation.parent = newManifest.animation;
}
this.manifest.fromHero.endFlight();
this.manifest.toHero.endFlight();
newManifest.fromHero.startFlight();
newManifest.toHero.startFlight();
this.overlayEntry.markNeedsBuild();
}
this._aborted = false;
this.manifest = newManifest;
}