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onEndScroll callback in carousel options #430

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onEndScroll callback in carousel options #430

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6 changes: 6 additions & 0 deletions lib/carousel_options.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,9 @@ class CarouselOptions {
/// Called whenever the carousel is scrolled
final ValueChanged<double?>? onScrolled;

/// Called whenever the carousel stops scrolling
final ValueChanged<int>? onEndScroll;

/// How the carousel should respond to user input.
///
/// For example, determines how the items continues to animate after the
Expand Down Expand Up @@ -148,6 +151,7 @@ class CarouselOptions {
this.enlargeCenterPage = false,
this.onPageChanged,
this.onScrolled,
this.onEndScroll,
this.scrollPhysics,
this.pageSnapping = true,
this.scrollDirection: Axis.horizontal,
Expand Down Expand Up @@ -178,6 +182,7 @@ class CarouselOptions {
bool? enlargeCenterPage,
Function(int index, CarouselPageChangedReason reason)? onPageChanged,
ValueChanged<double?>? onScrolled,
ValueChanged<int>? onEndScroll,
ScrollPhysics? scrollPhysics,
bool? pageSnapping,
Axis? scrollDirection,
Expand Down Expand Up @@ -205,6 +210,7 @@ class CarouselOptions {
enlargeCenterPage: enlargeCenterPage ?? this.enlargeCenterPage,
onPageChanged: onPageChanged ?? this.onPageChanged,
onScrolled: onScrolled ?? this.onScrolled,
onEndScroll: onEndScroll ?? this.onEndScroll,
scrollPhysics: scrollPhysics ?? this.scrollPhysics,
pageSnapping: pageSnapping ?? this.pageSnapping,
scrollDirection: scrollDirection ?? this.scrollDirection,
Expand Down
14 changes: 14 additions & 0 deletions lib/carousel_slider.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -202,6 +202,13 @@ class CarouselSliderState extends State<CarouselSlider>
notification is ScrollUpdateNotification) {
widget.options.onScrolled!(carouselState!.pageController!.page);
}
if (notification is ScrollEndNotification) {
widget.options.onEndScroll
?.call(getRealIndex(
carouselState!.pageController!.page!.toInt(),
carouselState!.realPage - carouselState!.initialPage,
carouselState!.itemCount));
}
return false;
},
child: wrapper,
Expand Down Expand Up @@ -235,6 +242,13 @@ class CarouselSliderState extends State<CarouselSlider>
notification is ScrollUpdateNotification) {
widget.options.onScrolled!(carouselState!.pageController!.page);
}
if (notification is ScrollEndNotification) {
widget.options.onEndScroll
?.call(getRealIndex(
carouselState!.pageController!.page!.toInt(),
carouselState!.realPage - carouselState!.initialPage,
carouselState!.itemCount));
}
return false;
},
child: wrapper,
Expand Down