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20 lines
1.0 KiB
Diff
20 lines
1.0 KiB
Diff
diff --git a/packages/flutter/lib/src/widgets/scroll_position_with_single_context.dart b/packages/flutter/lib/src/widgets/scroll_position_with_single_context.dart
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index 96d77f67008..85e42540728 100644
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--- a/packages/flutter/lib/src/widgets/scroll_position_with_single_context.dart
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+++ b/packages/flutter/lib/src/widgets/scroll_position_with_single_context.dart
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@@ -127,8 +127,12 @@ class ScrollPositionWithSingleContext extends ScrollPosition implements ScrollAc
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@override
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void applyUserOffset(double delta) {
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- updateUserScrollDirection(delta > 0.0 ? ScrollDirection.forward : ScrollDirection.reverse);
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- setPixels(pixels - physics.applyPhysicsToUserOffset(this, delta));
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+ final newPixels = pixels - physics.applyPhysicsToUserOffset(this, delta);
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+ if (_userScrollDirection == ScrollDirection.idle || (newPixels != setPixels(newPixels) && newPixels >= 0)) {
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+ updateUserScrollDirection(
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+ delta > 0.0 ? ScrollDirection.forward : ScrollDirection.reverse,
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+ );
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+ }
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}
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@override
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