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update demo about hero, make it better when slide out.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:extended_image/extended_image.dart'; | ||
|
|
||
| /// make hero better when slide out | ||
| class HeroWidget extends StatefulWidget { | ||
| const HeroWidget({ | ||
| required this.child, | ||
| required this.tag, | ||
| required this.slidePagekey, | ||
| this.slideType = SlideType.onlyImage, | ||
| }); | ||
| final Widget child; | ||
| final SlideType slideType; | ||
| final Object tag; | ||
| final GlobalKey<ExtendedImageSlidePageState> slidePagekey; | ||
| @override | ||
| _HeroWidgetState createState() => _HeroWidgetState(); | ||
| } | ||
|
|
||
| class _HeroWidgetState extends State<HeroWidget> { | ||
| late RectTween _rectTween; | ||
| @override | ||
| Widget build(BuildContext context) { | ||
| return Hero( | ||
| tag: widget.tag, | ||
| createRectTween: (Rect? begin, Rect? end) { | ||
| _rectTween = RectTween(begin: begin, end: end); | ||
| return _rectTween; | ||
| }, | ||
| // make hero better when slide out | ||
| flightShuttleBuilder: (BuildContext flightContext, | ||
| Animation<double> animation, | ||
| HeroFlightDirection flightDirection, | ||
| BuildContext fromHeroContext, | ||
| BuildContext toHeroContext) { | ||
| // make hero more smoothly | ||
| final Hero hero = (flightDirection == HeroFlightDirection.pop | ||
| ? fromHeroContext.widget | ||
| : toHeroContext.widget) as Hero; | ||
| if (flightDirection == HeroFlightDirection.pop) { | ||
| final bool fixTransform = widget.slideType == SlideType.onlyImage && | ||
| (widget.slidePagekey.currentState!.offset != Offset.zero || | ||
| widget.slidePagekey.currentState!.scale != 1.0); | ||
|
|
||
| final Widget toHeroWidget = (toHeroContext.widget as Hero).child; | ||
| return AnimatedBuilder( | ||
| animation: animation, | ||
| builder: (BuildContext buildContext, Widget? child) { | ||
| Widget animatedBuilderChild = hero.child; | ||
|
|
||
| // make hero more smoothly | ||
| animatedBuilderChild = Stack( | ||
| clipBehavior: Clip.antiAlias, | ||
| alignment: Alignment.center, | ||
| children: <Widget>[ | ||
| Opacity( | ||
| opacity: 1 - animation.value, | ||
| child: UnconstrainedBox( | ||
| child: SizedBox( | ||
| width: _rectTween.begin!.width, | ||
| height: _rectTween.begin!.height, | ||
| child: toHeroWidget, | ||
| ), | ||
| ), | ||
| ), | ||
| Opacity( | ||
| opacity: animation.value, | ||
| child: animatedBuilderChild, | ||
| ) | ||
| ], | ||
| ); | ||
|
|
||
| // fix transform when slide out | ||
| if (fixTransform) { | ||
| final Tween<Offset> offsetTween = Tween<Offset>( | ||
| begin: Offset.zero, | ||
| end: widget.slidePagekey.currentState!.offset); | ||
|
|
||
| final Tween<double> scaleTween = Tween<double>( | ||
| begin: 1.0, end: widget.slidePagekey.currentState!.scale); | ||
| animatedBuilderChild = Transform.translate( | ||
| offset: offsetTween.evaluate(animation), | ||
| child: Transform.scale( | ||
| scale: scaleTween.evaluate(animation), | ||
| child: animatedBuilderChild, | ||
| ), | ||
| ); | ||
| } | ||
|
|
||
| return animatedBuilderChild; | ||
| }, | ||
| ); | ||
| } | ||
| return hero.child; | ||
| }, | ||
| child: widget.child, | ||
| ); | ||
| } | ||
| } |
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