绘制点集

lib/paper/paper_app_bar.dart

@@ -0,0 +1,41 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+class PaperAppBar extends StatelessWidget implements PreferredSizeWidget {
+  final VoidCallback onClear;
+
+  const PaperAppBar({
+    Key? key,
+    required this.onClear,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return AppBar(
+      centerTitle: true,
+      elevation: 0,
+      systemOverlayStyle: const SystemUiOverlayStyle(
+          statusBarIconBrightness: Brightness.dark,
+          statusBarColor: Colors.transparent),
+      backgroundColor: Colors.white,
+      title: Text(
+        '画板绘制',
+        style: TextStyle(color: Colors.black, fontSize: 16),
+      ),
+      actions: [
+        IconButton(
+            splashRadius: 20,
+            onPressed: onClear,
+            icon: Icon(
+              CupertinoIcons.delete,
+              color: Colors.black,
+              size: 20,
+            ))
+      ],
+    );
+  }
+
+  @override
+  Size get preferredSize => const Size.fromHeight(kToolbarHeight);
+}