debugDescribeChildren method
- @override
override
Returns a list of DiagnosticsNode objects describing this node's children.
Children that are offstage should be added with style set to
DiagnosticsTreeStyle.offstage to indicate that they are offstage.
The list must not contain any null entries. If there are explicit null children to report, consider new DiagnosticsNode.message or DiagnosticsProperty<Object> as possible DiagnosticsNode objects to provide.
See also:
- RenderTable.debugDescribeChildren, which provides high quality custom descriptions for its child nodes.
Used by toStringDeep, toDiagnosticsNode and toStringShallow.
Implementation
@override
List<DiagnosticsNode> debugDescribeChildren() {
final List<DiagnosticsNode> children = <DiagnosticsNode>[];
if (firstChild != null) {
RenderBox child = firstChild;
while (true) {
final SliverMultiBoxAdaptorParentData childParentData = child.parentData;
children.add(child.toDiagnosticsNode(name: 'child with index ${childParentData.index}'));
if (child == lastChild)
break;
child = childParentData.nextSibling;
}
}
if (_keepAliveBucket.isNotEmpty) {
final List<int> indices = _keepAliveBucket.keys.toList()..sort();
for (int index in indices) {
children.add(_keepAliveBucket[index].toDiagnosticsNode(
name: 'child with index $index (kept alive offstage)',
style: DiagnosticsTreeStyle.offstage,
));
}
}
return children;
}