common dyn page

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/common/dyn/common_dyn_controller.dart

@@ -0,0 +1,80 @@
+import 'package:PiliPlus/pages/common/reply_controller.dart';
+import 'package:PiliPlus/utils/storage_pref.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart' show ScrollDirection;
+import 'package:get/get.dart';
+
+abstract class CommonDynController<R> extends ReplyController<R>
+    with GetSingleTickerProviderStateMixin {
+  int get oid;
+  int get replyType;
+
+  bool _showFab = true;
+  late final AnimationController fabAnimationCtr;
+  late final Animation<Offset> fabAnim;
+
+  final RxBool showTitle = false.obs;
+
+  late final horizontalPreview = Pref.horizontalPreview;
+  late final List<double> ratio = Pref.dynamicDetailRatio;
+
+  double offsetDy = 1;
+
+  @override
+  void onInit() {
+    fabAnimationCtr = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 300),
+    );
+    fabAnim =
+        Tween<Offset>(
+          begin: Offset(0, offsetDy),
+          end: Offset.zero,
+        ).animate(
+          CurvedAnimation(
+            parent: fabAnimationCtr,
+            curve: Curves.easeInOut,
+          ),
+        );
+    fabAnimationCtr.forward();
+    scrollController.addListener(listener);
+    super.onInit();
+  }
+
+  void listener() {
+    showTitle.value = scrollController.positions.first.pixels > 55;
+
+    final ScrollDirection direction1 =
+        scrollController.positions.first.userScrollDirection;
+    late final ScrollDirection direction2 =
+        scrollController.positions.last.userScrollDirection;
+    if (direction1 == ScrollDirection.forward ||
+        direction2 == ScrollDirection.forward) {
+      showFab();
+    } else if (direction1 == ScrollDirection.reverse ||
+        direction2 == ScrollDirection.reverse) {
+      hideFab();
+    }
+  }
+
+  void showFab() {
+    if (!_showFab) {
+      _showFab = true;
+      fabAnimationCtr.forward();
+    }
+  }
+
+  void hideFab() {
+    if (_showFab) {
+      _showFab = false;
+      fabAnimationCtr.reverse();
+    }
+  }
+
+  @override
+  void onClose() {
+    fabAnimationCtr.dispose();
+    scrollController.removeListener(listener);
+    super.onClose();
+  }
+}