public override bool shouldRepaint(CustomPainter old)
{
_IndicatorPainter _old = (_IndicatorPainter)old;
return(this._needsPaint ||
this.controller != _old.controller ||
this.indicator != _old.indicator ||
this.tabKeys.Count != _old.tabKeys.Count ||
!_tabOffsetsEqual(this._currentTabOffsets, _old._currentTabOffsets));
}
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
);
}
public _IndicatorPainter(
TabController controller = null,
Decoration indicator = null,
TabBarIndicatorSize?indicatorSize = null,
List <GlobalKey> tabKeys = null,
_IndicatorPainter old = null
) : base(repaint: controller.animation)
{
D.assert(controller != null);
D.assert(indicator != null);
this.controller = controller;
this.indicator = indicator;
this.indicatorSize = indicatorSize;
this.tabKeys = tabKeys;
if (old != null)
{
this.saveTabOffsets(old._currentTabOffsets);
}
}
