Added Cart and box Animation

Author: shekharAggarwal

lib/pizza_order/bloc/pizza_order_bloc.dart

@@ -1,16 +1,62 @@
+import 'dart:typed_data';
+import 'dart:ui';
+
 import 'package:flutter/foundation.dart' show ChangeNotifier, ValueNotifier;
+import 'package:flutter/rendering.dart';
 import 'package:flutter_animation/pizza_order/constant/ingredient.dart';
 
-class PizzaOrderBLoC extends ChangeNotifier{
+enum PizzaSizeValue {
+  s,
+  m,
+  l,
+}
+
+class PizzaSizeState {
+  PizzaSizeState(this.value) : factor = _getFactorBySize(value);
+  final PizzaSizeValue value;
+  final double factor;
+
+  static double _getFactorBySize(PizzaSizeValue value) {
+    switch (value) {
+      case PizzaSizeValue.s:
+        return 0.75;
+      case PizzaSizeValue.m:
+        return 0.85;
+      case PizzaSizeValue.l:
+        return 1.0;
+    }
+    return 0.0;
+  }
+}
+
+class PizzaMetadata {
+  const PizzaMetadata(this.imageBytes, this.position, this.size);
+
+  final Uint8List imageBytes;
+  final Offset position;
+  final Size size;
+}
+
+const initialTotal = 15;
+
+class PizzaOrderBLoC extends ChangeNotifier {
   final listIngredients = <Ingredient>[];
-  final notifierTotal = ValueNotifier(15);
+  final notifierTotal = ValueNotifier(initialTotal);
   final notifierDeletedIngredient = ValueNotifier<Ingredient>(null);
-  void addIngredient(Ingredient ingredient){
+  final notifierFocused = ValueNotifier(false);
+  final notifierPizzaSize =
+      ValueNotifier<PizzaSizeState>(PizzaSizeState(PizzaSizeValue.m));
+  final notifierPizzaBoxAnimation = ValueNotifier(false);
+
+  final notifierImagePizza = ValueNotifier<PizzaMetadata>(null);
+  final notifierCartIconAnimation = ValueNotifier(0);
+
+  void addIngredient(Ingredient ingredient) {
     listIngredients.add(ingredient);
     notifierTotal.value++;
   }
 
-  bool containsIngredient(Ingredient ingredient){
+  bool containsIngredient(Ingredient ingredient) {
     for (Ingredient i in listIngredients) {
       if (i.compare(ingredient)) {
         return true;
@@ -22,12 +68,31 @@ class PizzaOrderBLoC extends ChangeNotifier{
   void removeIngredient(Ingredient ingredient) {
     listIngredients.remove(ingredient);
     notifierTotal.value--;
-    notifierDeletedIngredient.value =ingredient;
-
+    notifierDeletedIngredient.value = ingredient;
   }
 
   void refreshDeletedIngredient() {
     notifierDeletedIngredient.value = null;
   }
 
+  void reset() {
+    notifierPizzaBoxAnimation.value = false;
+    notifierImagePizza.value = null;
+    listIngredients.clear();
+    notifierTotal.value = initialTotal;
+    notifierCartIconAnimation.value++;
+  }
+
+  void startPizzaBoxAnimation() {
+    notifierPizzaBoxAnimation.value = true;
+  }
+
+  Future<void> transformToImage(RenderRepaintBoundary boundary) async {
+    final position = boundary.localToGlobal(Offset.zero);
+    final size = boundary.size;
+    final image = await boundary.toImage();
+    ByteData byteData = await image.toByteData(format: ImageByteFormat.png);
+    notifierImagePizza.value =
+        PizzaMetadata(byteData.buffer.asUint8List(), position, size);
+  }
 }