TweenAnimationBuilder for building custom animations without managing an...

TweenAnimationBuilder for building custom animations without managing an AnimationController (#38317)

packages/flutter/lib/src/widgets/implicit_animations.dart

@@ -247,6 +247,8 @@ class TextStyleTween extends Tween<TextStyle> {
 /// usually named `AnimatedFoo`, where `Foo` is the name of the non-animated
 /// version of that widget. Commonly used implicitly animated widgets include:
 ///
+///  * [TweenAnimationBuilder], which animates any property expressed by
+///    a [Tween] to a specified target value.
 ///  * [AnimatedAlign], which is an implicitly animated version of [Align].
 ///  * [AnimatedContainer], which is an implicitly animated version of
 ///    [Container].

packages/flutter/lib/src/widgets/transitions.dart

@@ -917,6 +917,11 @@ class DefaultTextStyleTransition extends AnimatedWidget {
 /// }
 /// ```
 /// {@end-tool}
+///
+/// See also:
+///
+///  * [TweenAnimationBuilder], which animates a property to a target value
+///    without requiring manual management of an [AnimationController].
 class AnimatedBuilder extends AnimatedWidget {
   /// Creates an animated builder.
   ///

packages/flutter/lib/widgets.dart

@@ -106,6 +106,7 @@ export 'src/widgets/texture.dart';
 export 'src/widgets/ticker_provider.dart';
 export 'src/widgets/title.dart';
 export 'src/widgets/transitions.dart';
+export 'src/widgets/tween_animation_builder.dart';
 export 'src/widgets/unique_widget.dart';
 export 'src/widgets/value_listenable_builder.dart';
 export 'src/widgets/viewport.dart';