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Improve smooth scroll. Close #462

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nyne
2025-08-03 17:05:31 +08:00
parent 8a61a4750b
commit 3928f5afe7
1 changed files with 10 additions and 1 deletions
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11
lib/components/scroll.dart
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@@ -117,16 +117,25 @@ class _SmoothScrollProviderState extends State<SmoothScrollProvider> {
_futurePosition ??= currentLocation; _futurePosition ??= currentLocation;
double k = (_futurePosition! - currentLocation).abs() / 1600 + 1; double k = (_futurePosition! - currentLocation).abs() / 1600 + 1;
_futurePosition = _futurePosition! + pointerSignal.scrollDelta.dy * k; _futurePosition = _futurePosition! + pointerSignal.scrollDelta.dy * k;
var beforeOffset = (_futurePosition! - currentLocation).abs();
_futurePosition = _futurePosition!.clamp( _futurePosition = _futurePosition!.clamp(
_controller.position.minScrollExtent, _controller.position.minScrollExtent,
_controller.position.maxScrollExtent, _controller.position.maxScrollExtent,
); );
var afterOffset = (_futurePosition! - currentLocation).abs();
if (_futurePosition == old) return; if (_futurePosition == old) return;
var target = _futurePosition!; var target = _futurePosition!;
var duration = _fastAnimationDuration;
if (afterOffset < beforeOffset) {
duration = duration * (afterOffset / beforeOffset);
if (duration < Duration(milliseconds: 10)) {
duration = Duration(milliseconds: 10);
}
}
_controller _controller
.animateTo( .animateTo(
_futurePosition!, _futurePosition!,
duration: _fastAnimationDuration, duration: duration,
curve: Curves.linear, curve: Curves.linear,
) )
.then((_) { .then((_) {