public void _layout(ConstraintType constraints)
{
owner.buildScope(this, () => {
Widget built = null;
if (widget.builder != null)
{
try {
built = widget.builder(this, constraints);
WidgetsD.debugWidgetBuilderValue(widget, built);
} catch (Exception e) {
_debugDoingBuild = false;
IEnumerable <DiagnosticsNode> informationCollector()
{
yield return(new DiagnosticsDebugCreator(new DebugCreator(this)));
}
built = ErrorWidget.builder(WidgetsD._debugReportException("building " + this, e, informationCollector));
}
}
try {
_child = updateChild(_child, built, null);
D.assert(_child != null);
} catch (Exception e) {
_debugDoingBuild = false;
IEnumerable <DiagnosticsNode> informationCollector()
{
yield return(new DiagnosticsDebugCreator(new DebugCreator(this)));
}
built = ErrorWidget.builder(WidgetsD._debugReportException("building " + this, e, informationCollector));
}
});
}
void _rebuild()
{
try {
_child = updateChild(_child, widget.child,
_rootChildSlot);
// allow
}
catch (Exception ex) {
var details = new UIWidgetsErrorDetails(
exception: ex,
library: "widgets library",
context: new ErrorDescription("attaching to the render tree")
);
UIWidgetsError.reportError(details);
Widget error = ErrorWidget.builder(details);
_child = updateChild(null, error, _rootChildSlot);
}
}