-
Notifications
You must be signed in to change notification settings - Fork 23
/
sliver_treeview_sample.dart
146 lines (133 loc) · 4.23 KB
/
sliver_treeview_sample.dart
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
import 'package:animated_tree_view/animated_tree_view.dart';
import 'package:flutter/material.dart';
import '../../utils/utils.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Simple Animated Tree Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: const MyHomePage(title: 'Simple Animated Tree Demo'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final GlobalKey<SliverTreeViewState> _simpleTreeKey =
GlobalKey<SliverTreeViewState>();
final GlobalKey<SliverTreeViewState> _indexedTreeKey =
GlobalKey<SliverTreeViewState>();
final AutoScrollController scrollController = AutoScrollController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: CustomScrollView(
controller: scrollController,
slivers: [
SliverToBoxAdapter(
child: Padding(
padding: const EdgeInsets.only(top: 24.0),
child: Text(
"Simple Sliver List",
style: Theme.of(context).textTheme.headlineLarge,
),
),
),
/// Simple [SliverTreeView] example
SliverTreeView.simple(
key: _simpleTreeKey,
tree: simpleTree,
scrollController: scrollController,
expansionBehavior: ExpansionBehavior.none,
builder: (context, node) => Card(
color: colorMapper[node.level.clamp(0, colorMapper.length - 1)]!,
child: ListTile(
title: Text("Simple Item ${node.level}-${node.key}"),
subtitle: Text('Level ${node.level}'),
),
),
),
SliverToBoxAdapter(
child: Padding(
padding: const EdgeInsets.only(top: 24.0),
child: Text(
"Indexed Sliver List",
style: Theme.of(context).textTheme.headlineLarge,
),
),
),
///Indexed [SliverTreeView] example
SliverTreeView.indexed(
key: _indexedTreeKey,
tree: indexedTree,
scrollController: scrollController,
expansionBehavior: ExpansionBehavior.scrollToLastChild,
builder: (context, node) => Card(
color: colorMapper[node.level.clamp(0, colorMapper.length - 1)]!,
child: ListTile(
title: Text("Indexed Item ${node.level}-${node.key}"),
subtitle: Text('Level ${node.level}'),
),
),
),
],
),
);
}
}
final simpleTree = TreeNode.root()
..addAll([
TreeNode(key: "0A")..add(TreeNode(key: "0A1A")),
TreeNode(key: "0C")
..addAll([
TreeNode(key: "0C1A"),
TreeNode(key: "0C1B"),
TreeNode(key: "0C1C")
..addAll([
TreeNode(key: "0C1C2A")
..addAll([
TreeNode(key: "0C1C2A3A"),
TreeNode(key: "0C1C2A3B"),
TreeNode(key: "0C1C2A3C"),
]),
]),
]),
TreeNode(key: "0D"),
TreeNode(key: "0E"),
]);
final indexedTree = IndexedTreeNode.root()
..addAll([
IndexedTreeNode(key: "0A")..add(IndexedTreeNode(key: "0A1A")),
IndexedTreeNode(key: "0C")
..addAll([
IndexedTreeNode(key: "0C1A"),
IndexedTreeNode(key: "0C1B"),
IndexedTreeNode(key: "0C1C")
..addAll([
IndexedTreeNode(key: "0C1C2A")
..addAll([
IndexedTreeNode(key: "0C1C2A3A"),
IndexedTreeNode(key: "0C1C2A3B"),
IndexedTreeNode(key: "0C1C2A3C"),
]),
]),
]),
IndexedTreeNode(key: "0D"),
IndexedTreeNode(key: "0E"),
]);