初步优化项目结构

2021-09-26 20:50:13 +08:00
parent f16d031417
commit 29a985e1b1
535 changed files with 366 additions and 359 deletions
--- a/lib/widget_system/widgets/SingleChildRenderObjectWidget/CompositedTransformTarget/node1_base.dart
+++ b/lib/widget_system/widgets/SingleChildRenderObjectWidget/CompositedTransformTarget/node1_base.dart
@@ -0,0 +1,112 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+/// create by 张风捷特烈 on 2020/3/31
+/// contact me by email 1981462002@qq.com
+///
+/// 说明: 266 CompositedTransformTarget 2 合成变换目标，一般与 CompositedTransformFollower 组件联合使用，可以使 Overlay 伴随目标变换。
+//    {
+//      "widgetId": 266,
+//      "name": "CompositedTransformTarget 使用",
+//      "priority": 1,
+//      "subtitle":
+//          "【child】 : 子组件   【Widget】\n"
+//          "【link】 : 链接   【LayerLink】",
+//    }
+
+class CompositedTransformTargetDemo extends StatelessWidget {
+
+
+  const CompositedTransformTargetDemo();
+
+  static const  List<Color> colors =[Colors.red,Colors.yellow,Colors.blue,Colors.green];
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      transform: Matrix4.rotationZ(-15/180*pi),
+      height: 250,
+      padding: const EdgeInsets.all(50.0),
+      child:  ListView(
+          scrollDirection: Axis.horizontal,
+          children: <Widget>[
+            Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [_LogoTips(), const Text('点击图标\n显隐弹框')],
+            ),
+            ...colors.map((color) => Container(width: 80, color: color))
+          ],
+        ),
+    );
+  }
+
+}
+
+class _LogoTips extends StatefulWidget {
+  @override
+  _LogoTipsState createState() => _LogoTipsState();
+}
+
+class _LogoTipsState extends State<_LogoTips> {
+  OverlayEntry? _overlayEntry;
+
+  final LayerLink _layerLink = LayerLink();
+
+  bool show = false;
+
+  OverlayEntry _createOverlayEntry() {
+    return OverlayEntry(
+        builder: (context) => Positioned(
+              width: 150,
+              child: CompositedTransformFollower(
+                link: this._layerLink,
+                showWhenUnlinked: false,
+                targetAnchor: Alignment.topRight,
+                child: Card(
+                  child: Padding(
+                    padding: const EdgeInsets.all(8.0),
+                    child: Text('我是一个 Overlay，目标组件为图标，当它变换时，我会伴随变换。'),
+                  ),
+                ),
+              ),
+            ));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+        onTap: _toggleOverlay,
+        child: CompositedTransformTarget(
+          link: this._layerLink,
+          child:
+          FlutterLogo(
+            size: 80,
+          ),
+        ));
+  }
+
+  void _toggleOverlay() {
+    if (!show) {
+      _showOverlay();
+    } else {
+      _hideOverlay();
+    }
+    show = !show;
+  }
+
+  void _showOverlay() {
+    _overlayEntry = _createOverlayEntry();
+    Overlay.of(context)?.insert(_overlayEntry!);
+  }
+
+  void _hideOverlay() {
+    _overlayEntry?.remove();
+  }
+
+  @override
+  void dispose() {
+    _hideOverlay();
+    super.dispose();
+  }
+}