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; }