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/RepaintBoundary/node2_save.dart
+++ b/lib/widget_system/widgets/SingleChildRenderObjectWidget/RepaintBoundary/node2_save.dart
@@ -0,0 +1,71 @@
+import 'dart:io';
+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:path_provider/path_provider.dart';
+import 'dart:ui' as ui;
+import 'node1_base.dart';
+
+/// create by 张风捷特烈 on 2020/7/22
+/// contact me by email 1981462002@qq.com
+/// 说明:
+//    {
+//      "widgetId": 264,
+//      "name": "保存Widget成为图片",
+//      "priority": 2,
+//      "subtitle": "通过RenderRepaintBoundary可以获取子组件的Image信息，从而获取字节保存为图片文件。",
+//    }
+
+class RepaintBoundarySave extends StatelessWidget {
+  final GlobalKey _globalKey = GlobalKey();
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: [
+        RepaintBoundary(
+          key: _globalKey,
+          child: TempPlayBezier3Page(),
+        ),
+        Positioned(right: -10, child: _buildButton3(context))
+      ],
+    );
+  }
+
+  Widget _buildButton3(context) => MaterialButton(
+      child: Icon(
+        Icons.save_alt,
+        size: 15,
+        color: Colors.white,
+      ),
+      color: Colors.green,
+      shape: CircleBorder(
+        side: BorderSide(width: 2.0, color: Color(0xFFFFDFDFDF)),
+      ),
+      onPressed: () async {
+        var bits = await _widget2Image(_globalKey);
+        var dir = await getApplicationSupportDirectory();
+        var file = File(dir.path + "/save_img.png");
+        if(bits==null) return;
+        var f = await file.writeAsBytes(bits);
+        Scaffold.of(context).showSnackBar(SnackBar(
+          backgroundColor: Theme.of(context).primaryColor,
+          content: Text('保存成功后! 路径为:${f.path}'),
+        ));
+      });
+
+  Future<Uint8List?> _widget2Image(GlobalKey key) async {
+    RenderObject? boundary = key.currentContext?.findRenderObject();
+    if(boundary==null || boundary is! RenderRepaintBoundary) return null;
+
+    //获得 ui.image
+    ui.Image img = await boundary.toImage();
+    //获取图片字节
+    var byteData = await img.toByteData(format: ui.ImageByteFormat.png);
+    Uint8List? bits = byteData?.buffer.asUint8List();
+    return bits;
+  }
+}