Add dedicated effect_entry class for better organization

Author: esDotDev

lib/effect_entry.dart

@@ -0,0 +1,63 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_animate/flutter_animate.dart';
+
+import 'effects/effects.dart';
+import 'animate.dart';
+import 'animate_list.dart';
+
+export 'animate.dart';
+export 'animate_list.dart';
+export 'adapters/adapters.dart';
+export 'effects/effects.dart';
+
+export 'extensions/extensions.dart';
+
+/// Because [Effect] classes are immutable and may be reused between multiple
+/// [Animate] (or [AnimateList]) instances, an `EffectEntry` is created to store
+/// values that may be different between instances. For example, due to
+/// `AnimateList interval`, or from inheriting values from prior effects in the chain.
+@immutable
+class EffectEntry {
+  const EffectEntry({
+    required this.effect,
+    required this.delay,
+    required this.duration,
+    required this.curve,
+    required this.owner,
+  });
+
+  /// The delay for this entry.
+  final Duration delay;
+
+  /// The duration for this entry.
+  final Duration duration;
+
+  /// The curve used by this entry.
+  final Curve curve;
+
+  /// The effect associated with this entry.
+  final Effect effect;
+
+  /// The [Animate] instance that created this entry. This can be used by effects
+  /// to read information about the animation. Effects _should not_ modify
+  /// the animation (ex. by calling [Animate.addEffect]).
+  final Animate owner;
+
+  /// The begin time for this entry.
+  Duration get begin => delay;
+
+  /// The end time for this entry.
+  Duration get end => delay + duration;
+
+  /// Builds a sub-animation that runs from 0-1, based on the properties of this entry.
+  Animation<double> buildAnimation(
+    AnimationController controller, {
+    Curve? curve,
+  }) {
+    return buildSubAnimation(controller, begin, end, curve ?? this.curve);
+  }
+
+  /// Builds an sub-animation that runs from the begin and end values of a given [Tween]
+  Animation<T> buildTweenedAnimation<T>(AnimationController controller, Tween<T> tween) =>
+      buildAnimation(controller).drive(tween);
+}

lib/flutter_animate.dart

@@ -8,61 +8,15 @@ export 'animate.dart';
 export 'animate_list.dart';
 export 'adapters/adapters.dart';
 export 'effects/effects.dart';
-
+export 'effect_entry.dart';
 export 'extensions/extensions.dart';
 
-/// Because [BeginEndEffect] classes are immutable and may be reused between multiple
-/// [Animate] (or [AnimateList]) instances, an `EffectEntry` is created to store
-/// values that may be different between instances. For example, due to
-/// `AnimateList interval`, or from inheriting values from prior effects in the chain.
-@immutable
-class EffectEntry {
-  const EffectEntry({
-    required this.effect,
-    required this.delay,
-    required this.duration,
-    required this.curve,
-    required this.owner,
-  });
-
-  /// The delay for this entry.
-  final Duration delay;
-
-  /// The duration for this entry.
-  final Duration duration;
-
-  /// The curve used by this entry.
-  final Curve curve;
-
-  /// The effect associated with this entry.
-  final Effect effect;
-
-  /// The [Animate] instance that created this entry. This can be used by effects
-  /// to read information about the animation. Effects _should not_ modify
-  /// the animation (ex. by calling [Animate.addEffect]).
-  final Animate owner;
-
-  /// The begin time for this entry.
-  Duration get begin => delay;
-
-  /// The end time for this entry.
-  Duration get end => delay + duration;
-
-  /// Builds a sub-animation based on the properties of this entry.
-  Animation<double> buildAnimation(
-    AnimationController controller, {
-    Curve? curve,
-  }) {
-    return buildSubAnimation(controller, begin, end, curve ?? this.curve);
-  }
-}
-
 /// Builds a sub-animation to the provided controller that runs from start to
 /// end, with the provided curve. For example, it could create an animation that
 /// runs from 300ms to 800ms with an easeOut curve, within a controller that has a
 /// total duration of 1000ms.
 ///
-/// Mostly used by [EffectEntry] and [BeginEndEffect] classes.
+/// Mostly used by [EffectEntry] and [Effect] classes.
 Animation<double> buildSubAnimation(
   AnimationController controller,
   Duration begin,