feat: Added the scroll up animation. (#1020)

lib/badge_animation/ani_up.dart

@@ -0,0 +1,25 @@
+import 'package:badgemagic/badge_animation/animation_abstract.dart';
+
+class UpAnimation extends BadgeAnimation {
+  @override
+  void processAnimation(int badgeHeight, int badgeWidth, int animationIndex,
+      List<List<bool>> processGrid, List<List<bool>> canvas) {
+    int newWidth = processGrid[0].length;
+    int newHeight = processGrid.length;
+    for (int i = 0; i < badgeHeight; i++) {
+      for (int j = 0; j < badgeWidth; j++) {
+        if (j < badgeWidth && i < badgeHeight) {
+          int newGridRow = (i + animationIndex + newHeight) % newHeight;
+
+          bool upCondition = (i >= 0 &&
+              i < newHeight &&
+              j >= 0 &&
+              j < newWidth &&
+              processGrid[newGridRow][j]);
+
+          canvas[i][j] = upCondition;
+        }
+      }
+    }
+  }
+}

lib/providers/badgeview_provider.dart

@@ -2,11 +2,21 @@ import 'dart:async';
 
 import 'package:badgemagic/badge_animation/ani_left.dart';
 import 'package:badgemagic/badge_animation/ani_right.dart';
+import 'package:badgemagic/badge_animation/ani_up.dart';
 import 'package:badgemagic/badge_animation/animation_abstract.dart';
 import 'package:badgemagic/constants.dart';
 import 'package:flutter/material.dart';
 
 class DrawBadgeProvider extends ChangeNotifier {
+  bool _isDisposed = false;
+
+  @override
+  void dispose() {
+    _isDisposed = true;
+    timer?.cancel();
+    super.dispose();
+  }
+
   int animationIndex = 0;
   int animationSpeed = aniSpeedStrategy(0);
   int counter = 0;
@@ -85,7 +95,6 @@ class DrawBadgeProvider extends ChangeNotifier {
   }
 
   void startTimer() {
-    setAnimationMode(animationIndex);
     timer =
         Timer.periodic(Duration(microseconds: animationSpeed), (Timer timer) {
       renderGrid(newGrid);
@@ -96,7 +105,7 @@ class DrawBadgeProvider extends ChangeNotifier {
   Map<int, BadgeAnimation?> animationMap = {
     0: LeftAnimation(),
     1: RightAnimation(),
-    // 2: UpAnimation(),
+    2: UpAnimation(),
     // 3: DownAnimation(),
     // 4: FixedAnimation(),
     // 5: SnowFlakeAnimation(),
@@ -111,6 +120,7 @@ class DrawBadgeProvider extends ChangeNotifier {
   }
 
   void renderGrid(List<List<bool>> newGrid) {
+    if (_isDisposed) return;
     int badgeWidth = homeViewGrid[0].length;
     int badgeHeight = homeViewGrid.length;
     var canvas = List.generate(