Updated changelog.

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## [Unreleased]
+
+### Added
+- Added documentation for `MorpheusPageRoute` transitions.
+
+### Changed
+- Improved `MorpheusPageRoute` bidirectional transition when there is no transition widget.
+
 ## [1.2.0+3] - 2019-08-26
 
 ### Changed

example/lib/main.dart

@@ -93,15 +93,16 @@ class HomeScreen extends StatelessWidget {
         ],
       ),
       floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
-      floatingActionButton: FloatingActionButton(
+      floatingActionButton: FloatingActionButton.extended(
         key: createKey,
-        child: Icon(Icons.add),
+        icon: Icon(Icons.add),
+        label: Text('Create'),
         onPressed: () => Navigator.of(context).pushNamed(
           '/create',
           arguments: MorpheusRouteArguments(
             parentKey: createKey,
             transitionColor: Theme.of(context).accentColor,
-            borderRadius: BorderRadius.circular(56.0),
+            borderRadius: BorderRadius.circular(24.0),
           ),
         ),
       ),

lib/page_routes/morpheus_page_route.dart

@@ -62,7 +62,6 @@ class MorpheusPageRoute<T> extends PageRoute<T> {
   final bool scaleChild;
 
   RenderBox _findRenderBox() {
-
     final arguments = settings.arguments as MorpheusRouteArguments;
     final key = parentKey ?? arguments?.parentKey;
 
@@ -83,7 +82,6 @@ class MorpheusPageRoute<T> extends PageRoute<T> {
       _renderBox = renderBox;
       return renderBox;
     }
-
   }
 
   RenderBox _renderBox;
@@ -108,20 +106,20 @@ class MorpheusPageRoute<T> extends PageRoute<T> {
 
   @override
   Widget buildPage(
-      BuildContext context,
-      Animation<double> animation,
-      Animation<double> secondaryAnimation,
-      ) {
+    BuildContext context,
+    Animation<double> animation,
+    Animation<double> secondaryAnimation,
+  ) {
     return Builder(builder: builder);
   }
 
   @override
   Widget buildTransitions(
-      BuildContext context,
-      Animation<double> animation,
-      Animation<double> secondaryAnimation,
-      Widget child,
-      ) {
+    BuildContext context,
+    Animation<double> animation,
+    Animation<double> secondaryAnimation,
+    Widget child,
+  ) {
     final routeSettings = settings.arguments as MorpheusRouteArguments;
 
     // Define transition settings.
@@ -144,4 +142,4 @@ class MorpheusPageRoute<T> extends PageRoute<T> {
       settings: transitionSettings,
     );
   }
-}
+}

lib/page_routes/morpheus_page_transition.dart

@@ -249,6 +249,17 @@ class MorpheusPageTransition extends StatelessWidget {
   /// [transitionWidget] is scaled up before it fades into the [childScreen]
   /// that ends up at full-size.
   Widget buildBidirectionalTransition(Widget childScreen) {
+    // Controls the opacity of the [childScreen] in a transition where there is
+    // no transition widget.
+    final fadeInAnimation = CurvedAnimation(
+      parent: animation,
+      curve: Interval(
+        0.5,
+        1.0,
+        curve: Curves.fastOutSlowIn,
+      ),
+    );
+
     // The animation that controls the scale of the parent widget.
     final Animation<double> scaleParentAnimation = Tween<double>(
       begin: 1.0,
@@ -272,6 +283,19 @@ class MorpheusPageTransition extends StatelessWidget {
           )
         : Container();
 
+    // This transition is used in case there is no transition widget.
+    if (transitionWidget == null)
+      return FadeTransition(
+        opacity: fadeInAnimation,
+        child: ScaleTransition(
+          alignment: Alignment.topCenter,
+          scale: settings.scaleChild
+              ? scaleChildAnimation
+              : ConstantTween(1.0).animate(positionAnimationCurve),
+          child: childScreen,
+        ),
+      );
+
     return FadeTransition(
       opacity: PageTransitionOpacityTween(
         begin: 0.0,