From 0c556f393e587fca31a511838bd934161fde4475 Mon Sep 17 00:00:00 2001
From: Ricardo Dalarme <ricardo.dalarme@profusion.mobi>
Date: Fri, 13 Jan 2023 21:58:56 -0300
Subject: [PATCH] refactor(code): move the CardsAnimation to a specific file

---
 lib/src/cards_animation.dart       | 81 ++++++++++++++++++++++++++++++
 lib/src/swipeable_cards_stack.dart | 79 +----------------------------
 2 files changed, 82 insertions(+), 78 deletions(-)
 create mode 100644 lib/src/cards_animation.dart

diff --git a/lib/src/cards_animation.dart b/lib/src/cards_animation.dart
new file mode 100644
index 0000000..2e34e94
--- /dev/null
+++ b/lib/src/cards_animation.dart
@@ -0,0 +1,81 @@
+import 'package:flutter/widgets.dart';
+
+import 'swipeable_cards_stack.dart';
+
+class CardsAnimation {
+  static Animation<Alignment> backCardAlignmentAnim(
+    AnimationController parent,
+  ) {
+    return AlignmentTween(begin: cardsAlign[0], end: cardsAlign[1]).animate(
+      CurvedAnimation(
+        parent: parent,
+        curve: const Interval(0.4, 0.7, curve: Curves.easeIn),
+      ),
+    );
+  }
+
+  static Animation<Size?> backCardSizeAnim(AnimationController parent) {
+    return SizeTween(begin: cardsSize[2], end: cardsSize[1]).animate(
+      CurvedAnimation(
+        parent: parent,
+        curve: const Interval(0.4, 0.7, curve: Curves.easeIn),
+      ),
+    );
+  }
+
+  static Animation<Alignment> middleCardAlignmentAnim(
+    AnimationController parent,
+  ) {
+    return AlignmentTween(begin: cardsAlign[1], end: cardsAlign[2]).animate(
+      CurvedAnimation(
+        parent: parent,
+        curve: const Interval(0.2, 0.5, curve: Curves.easeIn),
+      ),
+    );
+  }
+
+  static Animation<Size?> middleCardSizeAnim(AnimationController parent) {
+    return SizeTween(begin: cardsSize[1], end: cardsSize[0]).animate(
+      CurvedAnimation(
+        parent: parent,
+        curve: const Interval(0.2, 0.5, curve: Curves.easeIn),
+      ),
+    );
+  }
+
+  static Animation<Alignment> frontCardDisappearAlignmentAnim(
+    AnimationController parent,
+    Alignment beginAlign,
+  ) {
+    if (beginAlign.x == -0.001 ||
+        beginAlign.x == 0.001 ||
+        beginAlign.x > 3.0 ||
+        beginAlign.x < -3.0) {
+      return AlignmentTween(
+        begin: beginAlign,
+        end: Alignment(
+          beginAlign.x > 0 ? beginAlign.x + 30.0 : beginAlign.x - 30.0,
+          0.0,
+        ), // Has swiped to the left or right?
+      ).animate(
+        CurvedAnimation(
+          parent: parent,
+          curve: const Interval(0.0, 0.5, curve: Curves.easeIn),
+        ),
+      );
+    } else {
+      return AlignmentTween(
+        begin: beginAlign,
+        end: Alignment(
+          0.0,
+          beginAlign.y > 0 ? beginAlign.y + 30.0 : beginAlign.y - 30.0,
+        ), // Has swiped to the top or bottom?
+      ).animate(
+        CurvedAnimation(
+          parent: parent,
+          curve: const Interval(0.0, 0.5, curve: Curves.easeIn),
+        ),
+      );
+    }
+  }
+}
diff --git a/lib/src/swipeable_cards_stack.dart b/lib/src/swipeable_cards_stack.dart
index 0d487ac..07a91dc 100644
--- a/lib/src/swipeable_cards_stack.dart
+++ b/lib/src/swipeable_cards_stack.dart
@@ -3,6 +3,7 @@ library swipeable_cards_stack;
 import 'dart:math';
 
 import 'package:flutter/material.dart';
+import 'package:swipeable_cards_stack/src/cards_animation.dart';
 import 'package:swipeable_cards_stack/src/swipeable_cards_stack_controller.dart';
 
 const List<Alignment> cardsAlign = [
@@ -290,81 +291,3 @@ class _SwipeableCardsStackState extends State<SwipeableCardsStack>
       ..forward();
   }
 }
-
-class CardsAnimation {
-  static Animation<Alignment> backCardAlignmentAnim(
-    AnimationController parent,
-  ) {
-    return AlignmentTween(begin: cardsAlign[0], end: cardsAlign[1]).animate(
-      CurvedAnimation(
-        parent: parent,
-        curve: const Interval(0.4, 0.7, curve: Curves.easeIn),
-      ),
-    );
-  }
-
-  static Animation<Size?> backCardSizeAnim(AnimationController parent) {
-    return SizeTween(begin: cardsSize[2], end: cardsSize[1]).animate(
-      CurvedAnimation(
-        parent: parent,
-        curve: const Interval(0.4, 0.7, curve: Curves.easeIn),
-      ),
-    );
-  }
-
-  static Animation<Alignment> middleCardAlignmentAnim(
-    AnimationController parent,
-  ) {
-    return AlignmentTween(begin: cardsAlign[1], end: cardsAlign[2]).animate(
-      CurvedAnimation(
-        parent: parent,
-        curve: const Interval(0.2, 0.5, curve: Curves.easeIn),
-      ),
-    );
-  }
-
-  static Animation<Size?> middleCardSizeAnim(AnimationController parent) {
-    return SizeTween(begin: cardsSize[1], end: cardsSize[0]).animate(
-      CurvedAnimation(
-        parent: parent,
-        curve: const Interval(0.2, 0.5, curve: Curves.easeIn),
-      ),
-    );
-  }
-
-  static Animation<Alignment> frontCardDisappearAlignmentAnim(
-    AnimationController parent,
-    Alignment beginAlign,
-  ) {
-    if (beginAlign.x == -0.001 ||
-        beginAlign.x == 0.001 ||
-        beginAlign.x > 3.0 ||
-        beginAlign.x < -3.0) {
-      return AlignmentTween(
-        begin: beginAlign,
-        end: Alignment(
-          beginAlign.x > 0 ? beginAlign.x + 30.0 : beginAlign.x - 30.0,
-          0.0,
-        ), // Has swiped to the left or right?
-      ).animate(
-        CurvedAnimation(
-          parent: parent,
-          curve: const Interval(0.0, 0.5, curve: Curves.easeIn),
-        ),
-      );
-    } else {
-      return AlignmentTween(
-        begin: beginAlign,
-        end: Alignment(
-          0.0,
-          beginAlign.y > 0 ? beginAlign.y + 30.0 : beginAlign.y - 30.0,
-        ), // Has swiped to the top or bottom?
-      ).animate(
-        CurvedAnimation(
-          parent: parent,
-          curve: const Interval(0.0, 0.5, curve: Curves.easeIn),
-        ),
-      );
-    }
-  }
-}