初步优化项目结构

lib/widget_system/widgets/ProxyWidget/Flexible/node1_base.dart

@@ -0,0 +1,95 @@
+import 'package:flutter/material.dart';
+
+/// create by 张风捷特烈 on 2020-03-22
+/// contact me by email 1981462002@qq.com
+/// 说明:
+
+//    {
+//      "widgetId": 109,
+//      "name": 'Flexible基本使用',
+//      "priority": 1,
+//      "subtitle":
+//          "【child】 : 孩子   【Widget】\n"
+//          "【fit】 : 适应模式*2   【FlexFit】\n"
+//          "【flex】 : 剩余空间分配占比   【int】",
+//    }
+class CustomFlexible extends StatefulWidget {
+  @override
+  _CustomFlexibleState createState() => _CustomFlexibleState();
+}
+
+class _CustomFlexibleState extends State<CustomFlexible> {
+  double _width = 300.0;
+  bool _loose = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(children: <Widget>[
+      Container(
+          color: Colors.grey.withAlpha(33),
+          width: _width,
+          padding: EdgeInsets.all(8.0),
+          child: Row(
+            children: <Widget>[
+              Flexible(
+                flex: 2,
+                child: Container(
+                  alignment: Alignment.center,
+                  height: 50,
+                  color: Colors.red,
+                  child: Text(
+                    'flex=2',
+                    style: TextStyle(color: Colors.white),
+                  ),
+                ),
+              ),
+              Flexible(
+                flex: 3,
+                child: Container(
+                  alignment: Alignment.center,
+                  height: 50,
+                  color: Colors.blue,
+                  child: Text(
+                    'flex=3',
+                    style: TextStyle(color: Colors.white),
+                  ),
+                ),
+              ),
+              Flexible(
+                flex: 4,
+                fit: _loose?FlexFit.loose:FlexFit.tight,
+                child: Container(
+                  constraints: BoxConstraints(maxWidth: 60),
+                  alignment: Alignment.center,
+                  height: 50,
+                  color: Colors.green,
+                  child: Text(
+                    'flex=4 \nfit:${_loose?'loose':'tight'}',
+                    style: TextStyle(color: Colors.white),
+                  ),
+                ),
+              )
+            ],
+          )),
+      _buildOp()
+    ]);
+  }
+
+  Widget _buildOp() {
+    return Row(
+      children: <Widget>[
+        Switch(
+            value: _loose,
+            onChanged: (v) => setState(() => _loose = v)),
+        Expanded(
+          child: Slider(
+            divisions: 10,
+              min: 100,
+              max: 350,
+              value: _width,
+              onChanged: (v) => setState(() => _width = v)),
+        ),
+      ],
+    );
+  }
+}