Skip to content
Merged
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
24 changes: 14 additions & 10 deletions packages/flutter/lib/src/material/tab_controller.dart
Original file line number Diff line number Diff line change
Expand Up @@ -101,16 +101,20 @@ class TabController extends ChangeNotifier {
///
/// The `initialIndex` must be valid given [length] and must not be null. If
/// [length] is zero, then `initialIndex` must be 0 (the default).
TabController({ int initialIndex = 0, Duration? animationDuration, required this.length, required TickerProvider vsync})
: assert(length >= 0),
assert(initialIndex >= 0 && (length == 0 || initialIndex < length)),
_index = initialIndex,
_previousIndex = initialIndex,
_animationDuration = animationDuration ?? kTabScrollDuration,
_animationController = AnimationController.unbounded(
value: initialIndex.toDouble(),
vsync: vsync,
);
TabController({
int initialIndex = 0,
Duration? animationDuration,
required this.length,
required TickerProvider vsync,
}) : assert(length >= 0),
assert(initialIndex >= 0 && (length == 0 || initialIndex < length)),
_index = initialIndex,
_previousIndex = initialIndex,
_animationDuration = animationDuration ?? kTabScrollDuration,
_animationController = AnimationController.unbounded(
value: initialIndex.toDouble(),
vsync: vsync,
);

// Private constructor used by `_copyWith`. This allows a new TabController to
// be created without having to create a new animationController.
Expand Down