TabBar constructor
Creates a material design tab bar.
The tabs
argument must not be null and its length must match the controller
's
TabController.length.
If a TabController is not provided, then there must be a DefaultTabController ancestor.
The indicatorWeight
parameter defaults to 2, and must not be null.
The indicatorPadding
parameter defaults to EdgeInsets.zero, and must not be null.
If indicator
is not null, then indicatorWeight
, indicatorPadding
, and
indicatorColor
are ignored.
Implementation
const TabBar({
Key key,
@required this.tabs,
this.controller,
this.isScrollable = false,
this.indicatorColor,
this.indicatorWeight = 2.0,
this.indicatorPadding = EdgeInsets.zero,
this.indicator,
this.indicatorSize,
this.labelColor,
this.labelStyle,
this.labelPadding,
this.unselectedLabelColor,
this.unselectedLabelStyle,
}) : assert(tabs != null),
assert(isScrollable != null),
assert(indicator != null || (indicatorWeight != null && indicatorWeight > 0.0)),
assert(indicator != null || (indicatorPadding != null)),
super(key: key);