defaultComputeDistanceToFirstActualBaseline method Null safety
- TextBaseline baseline
Returns the baseline of the first child with a baseline.
Useful when the children are displayed vertically in the same order they appear in the child list.
Implementation
double? defaultComputeDistanceToFirstActualBaseline(TextBaseline baseline) {
assert(!debugNeedsLayout);
ChildType? child = firstChild;
while (child != null) {
final ParentDataType? childParentData = child.parentData as ParentDataType?;
final double? result = child.getDistanceToActualBaseline(baseline);
if (result != null) {
return result + childParentData!.offset.dy;
}
child = childParentData!.nextSibling;
}
return null;
}