INNER CODE UNIT · Dart

prevPageOffset

fluttercandies/flutter_scrollview_observer · lib/src/common/observer_controller.dart:707

      double prevPageOffset = targetLeadingOffset + precedingScrollExtent;
      prevPageOffset = prevPageOffset < 0 ? 0 : prevPageOffset;
      // The offset of this page turning is the same as the previous one,
      // which means the [index] is wrong.
      if (lastPageTurningOffset == prevPageOffset) {
        Log.warning('The child corresponding to the index cannot be found.\n'
            'Please make sure the index is correct.');
        _handleScrollInterruption(context: ctx, completer: completer);
        return;
      }
      lastPageTurningOffset = prevPageOffset;
      final prevPageOffsetRectified = prevPageOffset.rectify(obj);
      if (isAnimateTo) {
        await _controller.animateTo(
          prevPageOffsetRectified,
          duration: _findingDuration,
          curve: _findingCurve,
        );

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