public override Widget build(BuildContext context)
{
Widget navigator = null;
if (this._navigator != null)
{
navigator = new Navigator(
key: this._navigator,
initialRoute: this.widget.initialRoute ?? Navigator.defaultRouteName,
onGenerateRoute: this._onGenerateRoute,
onUnknownRoute: this._onUnknownRoute,
observers: this.widget.navigatorObservers
);
}
Widget result;
if (this.widget.builder != null)
{
result = new Builder(
builder: _context => { return(this.widget.builder(_context, navigator)); }
);
}
else
{
D.assert(navigator != null);
result = navigator;
}
if (this.widget.textStyle != null)
{
result = new DefaultTextStyle(
style: this.widget.textStyle,
child: result
);
}
PerformanceOverlay performanceOverlay = null;
if (this.widget.showPerformanceOverlay)
{
performanceOverlay = PerformanceOverlay.allEnabled();
}
if (performanceOverlay != null)
{
result = new Stack(
children: new List <Widget> {
result,
new Positioned(top: 0.0f,
left: 0.0f,
right: 0.0f,
child: performanceOverlay)
});
}
D.assert(() => {
if (WidgetInspectorService.instance.debugShowInspector)
{
result = new WidgetInspector(null, result, this._InspectorSelectButtonBuilder);
}
return(true);
});
result = new Directionality(child: result, TextDirection.ltr);
result = new WindowProvider(
window: this.widget.window,
child: result
);
Locale appLocale = this.widget.locale != null
? this._resolveLocales(new List <Locale> {
this.widget.locale
}, this.widget.supportedLocales)
: this._locale;
result = new MediaQuery(
data: MediaQueryData.fromWindow(this.widget.window),
child: new Localizations(
locale: appLocale,
delegates: this._localizationsDelegates,
child: result)
);
return(result);
}
internal static Dictionary <object, _HeroState> _allHeroesFor(
BuildContext context,
bool isUserGestureTransition,
NavigatorState navigator)
{
D.assert(context != null);
D.assert(navigator != null);
Dictionary <object, _HeroState> result = new Dictionary <object, _HeroState> {
};
void inviteHero(StatefulElement hero, object tag)
{
D.assert(() => {
if (result.ContainsKey(tag))
{
throw new UIWidgetsError(
new List <DiagnosticsNode>()
{
new ErrorSummary("There are multiple heroes that share the same tag within a subtree."),
new ErrorDescription(
"Within each subtree for which heroes are to be animated (i.e. a PageRoute subtree), " +
"each Hero must have a unique non-null tag.\n" +
$"In this case, multiple heroes had the following tag: {tag}\n"
),
new DiagnosticsProperty <StatefulElement>("Here is the subtree for one of the offending heroes", hero, linePrefix: "# ", style: DiagnosticsTreeStyle.dense),
});
}
return(true);
});
Hero heroWidget = hero.widget as Hero;
_HeroState heroState = hero.state as _HeroState;
if (!isUserGestureTransition || heroWidget.transitionOnUserGestures)
{
result[tag] = heroState;
}
else
{
heroState.ensurePlaceholderIsHidden();
}
}
void visitor(Element element)
{
Widget widget = element.widget;
if (widget is Hero)
{
StatefulElement hero = element as StatefulElement;
object tag = ((Hero)widget).tag;
D.assert(tag != null);
if (Navigator.of(hero) == navigator)
{
inviteHero(hero, tag);
}
else
{
ModalRoute heroRoute = ModalRoute.of(hero);
if (heroRoute != null && heroRoute is PageRoute && heroRoute.isCurrent)
{
inviteHero(hero, tag);
}
}
}
element.visitChildren(visitor);
}
context.visitChildElements(visitor);
return(result);
}
