feat: fav topic

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>
2025-12-18 08:06:21 +08:00 · 2025-05-17 21:55:36 +08:00
parent 1d4eabb770
commit d7eb734aaf
55 changed files with 1509 additions and 500 deletions
--- a/lib/common/widgets/dynamic_sliver_appbar_medium.dart
+++ b/lib/common/widgets/dynamic_sliver_appbar_medium.dart
@@ -0,0 +1,176 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+/// https://github.com/flutter/flutter/issues/18345#issuecomment-1627644396
+class DynamicSliverAppBarMedium extends StatefulWidget {
+  const DynamicSliverAppBarMedium({
+    this.flexibleSpace,
+    super.key,
+    this.leading,
+    this.automaticallyImplyLeading = true,
+    this.title,
+    this.actions,
+    this.bottom,
+    this.elevation,
+    this.scrolledUnderElevation,
+    this.shadowColor,
+    this.surfaceTintColor,
+    this.forceElevated = false,
+    this.backgroundColor,
+    this.backgroundGradient,
+    this.foregroundColor,
+    this.iconTheme,
+    this.actionsIconTheme,
+    this.primary = true,
+    this.centerTitle,
+    this.excludeHeaderSemantics = false,
+    this.titleSpacing,
+    this.collapsedHeight,
+    this.expandedHeight,
+    this.floating = false,
+    this.pinned = false,
+    this.snap = false,
+    this.stretch = false,
+    this.stretchTriggerOffset = 100.0,
+    this.onStretchTrigger,
+    this.shape,
+    this.toolbarHeight = kToolbarHeight,
+    this.leadingWidth,
+    this.toolbarTextStyle,
+    this.titleTextStyle,
+    this.systemOverlayStyle,
+    this.forceMaterialTransparency = false,
+    this.clipBehavior,
+    this.appBarClipper,
+  });
+
+  final Widget? flexibleSpace;
+  final Widget? leading;
+  final bool automaticallyImplyLeading;
+  final Widget? title;
+  final List<Widget>? actions;
+  final PreferredSizeWidget? bottom;
+  final double? elevation;
+  final double? scrolledUnderElevation;
+  final Color? shadowColor;
+  final Color? surfaceTintColor;
+  final bool forceElevated;
+  final Color? backgroundColor;
+
+  /// If backgroundGradient is non null, backgroundColor will be ignored
+  final LinearGradient? backgroundGradient;
+  final Color? foregroundColor;
+  final IconThemeData? iconTheme;
+  final IconThemeData? actionsIconTheme;
+  final bool primary;
+  final bool? centerTitle;
+  final bool excludeHeaderSemantics;
+  final double? titleSpacing;
+  final double? expandedHeight;
+  final double? collapsedHeight;
+  final bool floating;
+  final bool pinned;
+  final ShapeBorder? shape;
+  final double toolbarHeight;
+  final double? leadingWidth;
+  final TextStyle? toolbarTextStyle;
+  final TextStyle? titleTextStyle;
+  final SystemUiOverlayStyle? systemOverlayStyle;
+  final bool forceMaterialTransparency;
+  final Clip? clipBehavior;
+  final bool snap;
+  final bool stretch;
+  final double stretchTriggerOffset;
+  final AsyncCallback? onStretchTrigger;
+  final CustomClipper<Path>? appBarClipper;
+
+  @override
+  State<DynamicSliverAppBarMedium> createState() =>
+      _DynamicSliverAppBarMediumState();
+}
+
+class _DynamicSliverAppBarMediumState extends State<DynamicSliverAppBarMedium> {
+  final GlobalKey _childKey = GlobalKey();
+
+  // As long as the height is 0 instead of the sliver app bar a sliver to box adapter will be used
+  // to calculate dynamically the size for the sliver app bar
+  double _height = 0;
+
+  @override
+  void initState() {
+    super.initState();
+    _updateHeight();
+  }
+
+  void _updateHeight() {
+    // Gets the new height and updates the sliver app bar. Needs to be called after the last frame has been rebuild
+    // otherwise this will throw an error
+    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+      if (_childKey.currentContext == null) return;
+      setState(() {
+        _height = (_childKey.currentContext!.findRenderObject()! as RenderBox)
+            .size
+            .height;
+      });
+    });
+  }
+
+  @override
+  void didChangeDependencies() {
+    _height = 0;
+    _updateHeight();
+    super.didChangeDependencies();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    //Needed to lay out the flexibleSpace the first time, so we can calculate its intrinsic height
+    if (_height == 0) {
+      return SliverToBoxAdapter(
+        child: SizedBox(
+          key: _childKey,
+          child: widget.flexibleSpace ?? const SizedBox(height: kToolbarHeight),
+        ),
+      );
+    }
+
+    return SliverAppBar.medium(
+      leading: widget.leading,
+      automaticallyImplyLeading: widget.automaticallyImplyLeading,
+      title: widget.title,
+      actions: widget.actions,
+      bottom: widget.bottom,
+      elevation: widget.elevation,
+      scrolledUnderElevation: widget.scrolledUnderElevation,
+      shadowColor: widget.shadowColor,
+      surfaceTintColor: widget.surfaceTintColor,
+      forceElevated: widget.forceElevated,
+      backgroundColor: widget.backgroundColor,
+      foregroundColor: widget.foregroundColor,
+      iconTheme: widget.iconTheme,
+      actionsIconTheme: widget.actionsIconTheme,
+      primary: widget.primary,
+      centerTitle: widget.centerTitle,
+      excludeHeaderSemantics: widget.excludeHeaderSemantics,
+      titleSpacing: widget.titleSpacing,
+      collapsedHeight: widget.collapsedHeight,
+      floating: widget.floating,
+      pinned: widget.pinned,
+      snap: widget.snap,
+      stretch: widget.stretch,
+      stretchTriggerOffset: widget.stretchTriggerOffset,
+      onStretchTrigger: widget.onStretchTrigger,
+      shape: widget.shape,
+      toolbarHeight: widget.toolbarHeight,
+      expandedHeight: _height - MediaQuery.paddingOf(context).top,
+      leadingWidth: widget.leadingWidth,
+      toolbarTextStyle: widget.toolbarTextStyle,
+      titleTextStyle: widget.titleTextStyle,
+      systemOverlayStyle: widget.systemOverlayStyle,
+      forceMaterialTransparency: widget.forceMaterialTransparency,
+      clipBehavior: widget.clipBehavior,
+      flexibleSpace: FlexibleSpaceBar(background: widget.flexibleSpace),
+    );
+  }
+}