opt play all btn

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

lib/pages/common/play_all_btn_mixin.dart

@@ -0,0 +1,40 @@
+import 'package:PiliPlus/utils/storage.dart';
+import 'package:PiliPlus/utils/storage_key.dart';
+import 'package:PiliPlus/utils/storage_pref.dart';
+import 'package:flutter/material.dart';
+import 'package:get/get_rx/get_rx.dart';
+
+mixin PlayAllBtnMixin {
+  late double dx = 0;
+  late final RxBool isPlayAll = Pref.enablePlayAll.obs;
+
+  void setIsPlayAll(bool isPlayAll) {
+    if (this.isPlayAll.value == isPlayAll) return;
+    this.isPlayAll.value = isPlayAll;
+    GStorage.setting.put(SettingBoxKey.enablePlayAll, isPlayAll);
+  }
+
+  Widget playAllBtn(VoidCallback onPlayAll) {
+    return AnimatedSlide(
+      offset: isPlayAll.value ? Offset.zero : const Offset(0.75, 0),
+      duration: const Duration(milliseconds: 120),
+      child: GestureDetector(
+        onHorizontalDragDown: (details) => dx = details.localPosition.dx,
+        onHorizontalDragStart: (details) => setIsPlayAll(
+          details.localPosition.dx < dx,
+        ),
+        child: FloatingActionButton.extended(
+          onPressed: () {
+            if (isPlayAll.value) {
+              onPlayAll();
+            } else {
+              setIsPlayAll(true);
+            }
+          },
+          label: const Text('播放全部'),
+          icon: const Icon(Icons.playlist_play),
+        ),
+      ),
+    );
+  }
+}