protected internal override Widget build(BuildContext context)
{
ThemeData themeData = Theme.of(context);
TabBarTheme tabBarTheme = TabBarTheme.of(context);
TextStyle defaultStyle = this.labelStyle ?? themeData.primaryTextTheme.body2;
TextStyle defaultUnselectedStyle =
this.unselectedLabelStyle ?? this.labelStyle ?? themeData.primaryTextTheme.body2;
Animation <float> animation = (Animation <float>) this.listenable;
TextStyle textStyle = this.selected
? TextStyle.lerp(defaultStyle, defaultUnselectedStyle, animation.value)
: TextStyle.lerp(defaultUnselectedStyle, defaultStyle, animation.value);
Color selectedColor = this.labelColor ?? tabBarTheme.labelColor ?? themeData.primaryTextTheme.body2.color;
Color unselectedColor = this.unselectedLabelColor ??
tabBarTheme.unselectedLabelColor ?? selectedColor.withAlpha(0xB2);
Color color = this.selected
? Color.lerp(selectedColor, unselectedColor, animation.value)
: Color.lerp(unselectedColor, selectedColor, animation.value);
return(new DefaultTextStyle(
style: textStyle.copyWith(color: color),
child: IconTheme.merge(
data: new IconThemeData(
size: 24.0f,
color: color),
child: this.child
)
));
}
void _initIndicatorPainter()
{
this._indicatorPainter = this._controller == null
? null
: new _IndicatorPainter(
controller: this._controller,
indicator: this._indicator,
indicatorSize: this.widget.indicatorSize ?? TabBarTheme.of(this.context).indicatorSize,
tabKeys: this._tabKeys,
old: this._indicatorPainter
);
}