admin1
20 lines
442 B
Dart
20 lines
442 B
Dart
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library;
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double multiSourceScrollOffset({
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required int activeIndex,
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required double viewportWidth,
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required double leadingPad,
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required double maxScrollExtent,
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double cardWidth = 220.0,
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double cardGap = 12.0,
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}) {
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if (activeIndex <= 0) return 0.0;
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final target =
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leadingPad +
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activeIndex * (cardWidth + cardGap) -
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(viewportWidth - cardWidth) / 2;
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return target.clamp(0.0, maxScrollExtent).toDouble();
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}
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