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马良AI写作初始化仓库

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邓滨杰
2025-09-10 00:07:52 +08:00
parent 3c06bb1a03
commit 39c0f8840f
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AINoval/lib/widgets/common/scene_selector.dart Normal file
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import 'package:flutter/material.dart';
import 'package:ainoval/models/novel_structure.dart';
/// 场景选择器组件
/// 提供场景信息显示和下拉选择功能，支持大量场景的性能优化
class SceneSelector extends StatefulWidget {
const SceneSelector({
Key? key,
required this.novel,
required this.activeSceneId,
required this.onSceneSelected,
this.onSummaryLoaded,
this.compact = false,
}) : super(key: key);
final Novel novel;
final String? activeSceneId;
final Function(String sceneId, String actId, String chapterId) onSceneSelected;
final Function(String summary)? onSummaryLoaded;
final bool compact;
@override
State<SceneSelector> createState() => _SceneSelectorState();
}
class _SceneSelectorState extends State<SceneSelector> {
final GlobalKey _buttonKey = GlobalKey();
List<_SceneItem> _cachedSceneItems = [];
bool _isDropdownOpen = false;
OverlayEntry? _overlayEntry;
@override
void initState() {
super.initState();
_buildSceneItemsCache();
}
@override
void didUpdateWidget(SceneSelector oldWidget) {
super.didUpdateWidget(oldWidget);
if (oldWidget.novel != widget.novel) {
_buildSceneItemsCache();
}
}
@override
void dispose() {
_closeDropdown();
super.dispose();
}
/// 构建场景项缓存，提高性能
void _buildSceneItemsCache() {
_cachedSceneItems = [];
for (final act in widget.novel.acts) {
// 添加Act分组标题
_cachedSceneItems.add(_SceneItem(
type: _SceneItemType.actHeader,
title: act.title,
actId: act.id,
));
// 添加Act下的Chapter和Scene
for (final chapter in act.chapters) {
// 添加Chapter分组标题
_cachedSceneItems.add(_SceneItem(
type: _SceneItemType.chapterHeader,
title: chapter.title,
actId: act.id,
chapterId: chapter.id,
));
// 添加Scene
for (int i = 0; i < chapter.scenes.length; i++) {
final scene = chapter.scenes[i];
_cachedSceneItems.add(_SceneItem(
type: _SceneItemType.scene,
title: scene.title,
actId: act.id,
chapterId: chapter.id,
sceneId: scene.id,
sceneIndex: i,
sceneSummary: scene.summary?.content,
));
}
}
}
}
/// 打开下拉菜单
void _openDropdown() {
if (_isDropdownOpen) return;
final RenderBox buttonRenderBox = _buttonKey.currentContext!.findRenderObject() as RenderBox;
final buttonPosition = buttonRenderBox.localToGlobal(Offset.zero);
final buttonSize = buttonRenderBox.size;
_overlayEntry = OverlayEntry(
builder: (context) => _DropdownOverlay(
buttonPosition: buttonPosition,
buttonSize: buttonSize,
items: _cachedSceneItems,
activeSceneId: widget.activeSceneId,
onItemSelected: (sceneId, actId, chapterId) {
_closeDropdown();
widget.onSceneSelected(sceneId, actId, chapterId);
},
onClose: _closeDropdown,
),
);
Overlay.of(context).insert(_overlayEntry!);
setState(() {
_isDropdownOpen = true;
});
}
/// 关闭下拉菜单
void _closeDropdown() {
if (!_isDropdownOpen) return;
_overlayEntry?.remove();
_overlayEntry = null;
setState(() {
_isDropdownOpen = false;
});
}
/// 获取当前场景信息
String _getCurrentSceneInfo() {
final activeScene = _getActiveScene();
if (activeScene == null) return '未选择场景';
final scenePosition = _getScenePosition(activeScene);
if (widget.compact) {
return scenePosition;
}
return '$scenePosition · ${activeScene.title}';
}
/// 获取当前激活的场景
Scene? _getActiveScene() {
if (widget.activeSceneId == null) return null;
for (final act in widget.novel.acts) {
for (final chapter in act.chapters) {
for (final scene in chapter.scenes) {
if (scene.id == widget.activeSceneId) {
return scene;
}
}
}
}
return null;
}
/// 获取场景位置信息
String _getScenePosition(Scene scene) {
int actIndex = 0;
int chapterIndex = 0;
int sceneIndex = 0;
for (int i = 0; i < widget.novel.acts.length; i++) {
final act = widget.novel.acts[i];
for (int j = 0; j < act.chapters.length; j++) {
final chapter = act.chapters[j];
for (int k = 0; k < chapter.scenes.length; k++) {
final sceneItem = chapter.scenes[k];
if (sceneItem.id == scene.id) {
actIndex = i + 1;
chapterIndex = j + 1;
sceneIndex = k + 1;
break;
}
}
}
}
return '第${actIndex}卷 · 第${chapterIndex}章 · 第${sceneIndex}场';
}
@override
Widget build(BuildContext context) {
return Container(
key: _buttonKey,
height: 36,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(8),
border: Border.all(
color: _isDropdownOpen ? Colors.blue : Colors.grey[300]!,
width: 1,
),
boxShadow: _isDropdownOpen ? [
BoxShadow(
color: Colors.blue.withOpacity(0.1),
blurRadius: 4,
offset: const Offset(0, 2),
),
] : null,
),
child: Material(
color: Colors.transparent,
child: InkWell(
onTap: _isDropdownOpen ? _closeDropdown : _openDropdown,
borderRadius: BorderRadius.circular(8),
hoverColor: Colors.grey[50],
child: Container(
height: 34,
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
alignment: Alignment.centerLeft,
child: Row(
children: [
Expanded(
child: Text(
_getCurrentSceneInfo(),
style: const TextStyle(
fontSize: 12,
fontWeight: FontWeight.w500,
color: Colors.black87,
),
overflow: TextOverflow.ellipsis,
),
),
const SizedBox(width: 8),
Icon(
_isDropdownOpen ? Icons.keyboard_arrow_up : Icons.keyboard_arrow_down,
size: 18,
color: _isDropdownOpen ? Colors.blue : Colors.grey[600],
),
],
),
),
),
),
);
}
}
/// 自定义下拉菜单覆盖层
class _DropdownOverlay extends StatefulWidget {
const _DropdownOverlay({
required this.buttonPosition,
required this.buttonSize,
required this.items,
required this.activeSceneId,
required this.onItemSelected,
required this.onClose,
});
final Offset buttonPosition;
final Size buttonSize;
final List<_SceneItem> items;
final String? activeSceneId;
final Function(String sceneId, String actId, String chapterId) onItemSelected;
final VoidCallback onClose;
@override
State<_DropdownOverlay> createState() => _DropdownOverlayState();
}
class _DropdownOverlayState extends State<_DropdownOverlay> {
final ScrollController _scrollController = ScrollController();
@override
void dispose() {
_scrollController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
// 计算下拉菜单的位置和大小
final screenSize = MediaQuery.of(context).size;
final maxHeight = 300.0; // 增加最大高度
// 计算菜单位置，确保上边缘紧贴按钮下边缘
final menuTop = widget.buttonPosition.dy + widget.buttonSize.height;
final menuLeft = widget.buttonPosition.dx;
final menuWidth = widget.buttonSize.width;
// 确保菜单不会超出屏幕
final availableHeight = screenSize.height - menuTop - 20;
final menuHeight = maxHeight < availableHeight ? maxHeight : availableHeight;
return Stack(
children: [
// 背景遮罩，点击关闭下拉菜单
Positioned.fill(
child: GestureDetector(
onTap: widget.onClose,
child: Container(
color: Colors.transparent,
),
),
),
// 下拉菜单
Positioned(
left: menuLeft,
top: menuTop,
width: menuWidth,
height: menuHeight,
child: Material(
elevation: 12, // 增加阴影
borderRadius: BorderRadius.circular(8),
shadowColor: Colors.black.withOpacity(0.15),
child: Container(
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(8),
border: Border.all(color: Colors.grey[200]!, width: 1),
),
child: Column(
children: [
// 显示场景数量限制提示
if (widget.items.where((item) => item.type == _SceneItemType.scene).length > 200)
Container(
padding: const EdgeInsets.all(10),
decoration: BoxDecoration(
color: Colors.orange[50],
borderRadius: const BorderRadius.only(
topLeft: Radius.circular(8),
topRight: Radius.circular(8),
),
),
child: Row(
children: [
Icon(
Icons.info_outline,
size: 14,
color: Colors.orange[600],
),
const SizedBox(width: 6),
const Text(
'场景数量过多，仅显示前200个场景',
style: TextStyle(
fontSize: 11,
color: Colors.orange,
),
),
],
),
),
// 场景列表
Expanded(
child: Theme(
data: Theme.of(context).copyWith(
scrollbarTheme: ScrollbarThemeData(
thickness: MaterialStateProperty.all(6),
radius: const Radius.circular(3),
thumbColor: MaterialStateProperty.all(Colors.grey[400]),
trackColor: MaterialStateProperty.all(Colors.grey[200]),
),
),
child: Scrollbar(
controller: _scrollController,
child: ListView.builder(
controller: _scrollController,
padding: const EdgeInsets.symmetric(vertical: 6),
itemCount: widget.items.length,
itemBuilder: (context, index) {
final item = widget.items[index];
return _buildDropdownItem(item);
},
),
),
),
),
],
),
),
),
),
],
);
}
Widget _buildDropdownItem(_SceneItem item) {
switch (item.type) {
case _SceneItemType.actHeader:
return Container(
height: 28,
padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 6),
margin: const EdgeInsets.symmetric(horizontal: 4, vertical: 2),
decoration: BoxDecoration(
color: Colors.grey[50],
borderRadius: BorderRadius.circular(4),
),
alignment: Alignment.centerLeft,
child: Text(
item.title,
style: const TextStyle(
fontWeight: FontWeight.bold,
fontSize: 11,
color: Colors.black87,
),
),
);
case _SceneItemType.chapterHeader:
return Container(
height: 24,
padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 4),
margin: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
alignment: Alignment.centerLeft,
child: Text(
item.title,
style: const TextStyle(
fontWeight: FontWeight.w500,
fontSize: 10,
color: Colors.black54,
),
),
);
case _SceneItemType.scene:
final isSelected = item.sceneId == widget.activeSceneId;
final hasSummary = item.sceneSummary != null && item.sceneSummary!.isNotEmpty;
return Container(
margin: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(6),
),
child: Material(
color: isSelected ? Colors.blue[50] : Colors.transparent,
borderRadius: BorderRadius.circular(6),
child: InkWell(
onTap: () {
widget.onItemSelected(item.sceneId!, item.actId, item.chapterId!);
},
borderRadius: BorderRadius.circular(6),
hoverColor: isSelected ? Colors.blue[100] : Colors.grey[100],
splashColor: isSelected ? Colors.blue[200] : Colors.grey[200],
child: Container(
// 动态高度：有摘要时使用更大的高度
height: hasSummary ? 44 : 30,
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const SizedBox(width: 12),
// 场景序号容器，固定在顶部对齐
Container(
margin: const EdgeInsets.only(top: 1),
child: Container(
width: 12,
height: 12,
decoration: BoxDecoration(
color: isSelected ? Colors.blue : Colors.grey[700],
borderRadius: BorderRadius.circular(6),
boxShadow: isSelected ? [
BoxShadow(
color: Colors.blue.withOpacity(0.3),
blurRadius: 2,
offset: const Offset(0, 1),
),
] : null,
),
child: Center(
child: Text(
'${item.sceneIndex! + 1}',
style: const TextStyle(
fontSize: 7,
fontWeight: FontWeight.w600,
color: Colors.white,
),
),
),
),
),
const SizedBox(width: 10),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: [
Text(
item.title,
style: TextStyle(
fontSize: 10,
fontWeight: FontWeight.w500,
color: isSelected ? Colors.blue[700] : Colors.black87,
),
overflow: TextOverflow.ellipsis,
),
if (hasSummary) ...[
const SizedBox(height: 2),
Text(
item.sceneSummary!,
style: TextStyle(
fontSize: 9,
color: isSelected ? Colors.blue[600] : Colors.grey[600],
),
overflow: TextOverflow.ellipsis,
maxLines: 1,
),
],
],
),
),
],
),
),
),
),
);
}
}
}
/// 场景项类型枚举
enum _SceneItemType {
actHeader,
chapterHeader,
scene,
}
/// 场景项数据类
class _SceneItem {
final _SceneItemType type;
final String title;
final String actId;
final String? chapterId;
final String? sceneId;
final int? sceneIndex;
final String? sceneSummary;
_SceneItem({
required this.type,
required this.title,
required this.actId,
this.chapterId,
this.sceneId,
this.sceneIndex,
this.sceneSummary,
});
}