Version 0.1.0

lib/widgets/transparent_route.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+// This is a modified version of MaterialPageRoute that we can't extend without
+// hitting an assertion.
+class TransparentRoute<T> extends PageRoute<T> {
+  final Widget Function(BuildContext context) builder;
+
+  MaterialPageRoute route;
+
+  TransparentRoute({
+    this.builder,
+  });
+
+  @override
+  bool get opaque => false;
+
+  @override
+  Color get barrierColor => null;
+
+  @override
+  String get barrierLabel => null;
+
+  @override
+  bool get maintainState => true;
+
+  @override
+  Duration get transitionDuration => Duration(milliseconds: 300);
+
+  @override
+  Widget buildPage(BuildContext context, Animation<double> animation,
+      Animation<double> secondaryAnimation) {
+    final result = builder(context);
+    return Semantics(
+        scopesRoute: true,
+        explicitChildNodes: true,
+        child: result,
+    );
+  }
+
+  @override
+  Widget buildTransitions(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child) {
+    final PageTransitionsTheme theme = Theme.of(context).pageTransitionsTheme;
+    return theme.buildTransitions<T>(this, context, animation, secondaryAnimation, child);
+  }
+}