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Copy pasted the SmoothStarRating package.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,232 @@ | ||
| import 'dart:async'; | ||
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| import 'package:flutter/foundation.dart'; | ||
| import 'package:flutter/material.dart'; | ||
|
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| typedef RatingChangeCallback = void Function(double rating); | ||
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| class SmoothStarRating extends StatefulWidget { | ||
| final int starCount; | ||
| final double rating; | ||
| final RatingChangeCallback onRated; | ||
| final Color color; | ||
| final Color borderColor; | ||
| final double size; | ||
| final bool allowHalfRating; | ||
| final IconData filledIconData; | ||
| final IconData halfFilledIconData; | ||
| final IconData defaultIconData; //this is needed only when having fullRatedIconData && halfRatedIconData | ||
| final double spacing; | ||
| final bool isReadOnly; | ||
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| SmoothStarRating({ | ||
| this.starCount = 5, | ||
| this.isReadOnly = false, | ||
| this.spacing = 0.0, | ||
| this.rating = 0.0, | ||
| this.defaultIconData = Icons.star_border, | ||
| this.onRated, | ||
| this.color, | ||
| this.borderColor, | ||
| this.size = 25, | ||
| this.filledIconData = Icons.star, | ||
| this.halfFilledIconData = Icons.star_half, | ||
| this.allowHalfRating = true, | ||
| }) { | ||
| assert(this.rating != null); | ||
| } | ||
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| @override | ||
| _SmoothStarRatingState createState() => _SmoothStarRatingState(); | ||
| } | ||
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| class _SmoothStarRatingState extends State<SmoothStarRating> { | ||
| final double halfStarThreshold = 0.53; //half star value starts from this number | ||
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| //tracks for user tapping on this widget | ||
| bool isWidgetTapped = false; | ||
| double currentRating; | ||
| Timer debounceTimer; | ||
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| @override | ||
| void initState() { | ||
| currentRating = widget.rating; | ||
| super.initState(); | ||
| } | ||
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| @override | ||
| void dispose() { | ||
| debounceTimer?.cancel(); | ||
| debounceTimer = null; | ||
| super.dispose(); | ||
| } | ||
|
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| @override | ||
| Widget build(BuildContext context) { | ||
| return Material( | ||
| color: Colors.transparent, | ||
| child: Wrap( | ||
| alignment: WrapAlignment.start, spacing: widget.spacing, children: List.generate(widget.starCount, (index) => buildStar(context, index))), | ||
| ); | ||
| } | ||
|
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| Widget buildStar(BuildContext context, int index) { | ||
| Icon icon; | ||
| if (index >= currentRating) { | ||
| icon = Icon( | ||
| widget.defaultIconData, | ||
| color: widget.borderColor ?? Theme.of(context).primaryColor, | ||
| size: widget.size, | ||
| ); | ||
| } else if (index > currentRating - (widget.allowHalfRating ? halfStarThreshold : 1.0) && index < currentRating) { | ||
| icon = Icon( | ||
| widget.halfFilledIconData, | ||
| color: widget.color ?? Theme.of(context).primaryColor, | ||
| size: widget.size, | ||
| ); | ||
| } else { | ||
| icon = Icon( | ||
| widget.filledIconData, | ||
| color: widget.color ?? Theme.of(context).primaryColor, | ||
| size: widget.size, | ||
| ); | ||
| } | ||
| final Widget star = widget.isReadOnly | ||
| ? icon | ||
| : kIsWeb | ||
| ? MouseRegion( | ||
| onExit: (event) { | ||
| if (widget.onRated != null && !isWidgetTapped) { | ||
| //reset to zero only if rating is not set by user | ||
| setState(() { | ||
| currentRating = 0; | ||
| }); | ||
| } | ||
| }, | ||
| onEnter: (event) { | ||
| isWidgetTapped = false; //reset | ||
| }, | ||
| onHover: (event) { | ||
| RenderBox box = context.findRenderObject() as RenderBox; | ||
| var _pos = box.globalToLocal(event.position); | ||
| var i = _pos.dx / widget.size; | ||
| var newRating = widget.allowHalfRating ? i : i.round().toDouble(); | ||
| if (newRating > widget.starCount) { | ||
| newRating = widget.starCount.toDouble(); | ||
| } | ||
| if (newRating < 0) { | ||
| newRating = 0.0; | ||
| } | ||
| setState(() { | ||
| currentRating = newRating; | ||
| }); | ||
| }, | ||
| child: GestureDetector( | ||
| onTapDown: (detail) { | ||
| isWidgetTapped = true; | ||
|
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| RenderBox box = context.findRenderObject() as RenderBox; | ||
| var _pos = box.globalToLocal(detail.globalPosition); | ||
| var i = ((_pos.dx - widget.spacing) / widget.size); | ||
| var newRating = widget.allowHalfRating ? i : i.round().toDouble(); | ||
| if (newRating > widget.starCount) { | ||
| newRating = widget.starCount.toDouble(); | ||
| } | ||
| if (newRating < 0) { | ||
| newRating = 0.0; | ||
| } | ||
| setState(() { | ||
| currentRating = newRating; | ||
| }); | ||
| if (widget.onRated != null) { | ||
| widget.onRated(normalizeRating(currentRating)); | ||
| } | ||
| }, | ||
| onHorizontalDragUpdate: (dragDetails) { | ||
| isWidgetTapped = true; | ||
|
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| RenderBox box = context.findRenderObject() as RenderBox; | ||
| var _pos = box.globalToLocal(dragDetails.globalPosition); | ||
| var i = _pos.dx / widget.size; | ||
| var newRating = widget.allowHalfRating ? i : i.round().toDouble(); | ||
| if (newRating > widget.starCount) { | ||
| newRating = widget.starCount.toDouble(); | ||
| } | ||
| if (newRating < 0) { | ||
| newRating = 0.0; | ||
| } | ||
| setState(() { | ||
| currentRating = newRating; | ||
| }); | ||
| debounceTimer?.cancel(); | ||
| debounceTimer = Timer(Duration(milliseconds: 100), () { | ||
| if (widget.onRated != null) { | ||
| currentRating = normalizeRating(newRating); | ||
| widget.onRated(currentRating); | ||
| } | ||
| }); | ||
| }, | ||
| child: icon, | ||
| ), | ||
| ) | ||
| : GestureDetector( | ||
| onTapDown: (detail) { | ||
| RenderBox box = context.findRenderObject() as RenderBox; | ||
| var _pos = box.globalToLocal(detail.globalPosition); | ||
| var i = ((_pos.dx - widget.spacing) / widget.size); | ||
| var newRating = widget.allowHalfRating ? i : i.round().toDouble(); | ||
| if (newRating > widget.starCount) { | ||
| newRating = widget.starCount.toDouble(); | ||
| } | ||
| if (newRating < 0) { | ||
| newRating = 0.0; | ||
| } | ||
| newRating = normalizeRating(newRating); | ||
| setState(() { | ||
| currentRating = newRating; | ||
| }); | ||
| }, | ||
| onTapUp: (e) { | ||
| if (widget.onRated != null) widget.onRated(currentRating); | ||
| }, | ||
| onHorizontalDragUpdate: (dragDetails) { | ||
| RenderBox box = context.findRenderObject() as RenderBox; | ||
| var _pos = box.globalToLocal(dragDetails.globalPosition); | ||
| var i = _pos.dx / widget.size; | ||
| var newRating = widget.allowHalfRating ? i : i.round().toDouble(); | ||
| if (newRating > widget.starCount) { | ||
| newRating = widget.starCount.toDouble(); | ||
| } | ||
| if (newRating < 0) { | ||
| newRating = 0.0; | ||
| } | ||
| setState(() { | ||
| currentRating = newRating; | ||
| }); | ||
| debounceTimer?.cancel(); | ||
| debounceTimer = Timer(Duration(milliseconds: 100), () { | ||
| if (widget.onRated != null) { | ||
| currentRating = normalizeRating(newRating); | ||
| widget.onRated(currentRating); | ||
| } | ||
| }); | ||
| }, | ||
| child: icon, | ||
| ); | ||
|
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| return star; | ||
| } | ||
|
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| double normalizeRating(double newRating) { | ||
| var k = newRating - newRating.floor(); | ||
| if (k != 0) { | ||
| //half stars | ||
| if (k >= halfStarThreshold) { | ||
| newRating = newRating.floor() + 1.0; | ||
| } else { | ||
| newRating = newRating.floor() + 0.5; | ||
| } | ||
| } | ||
| return newRating; | ||
| } | ||
| } |
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