90 lines
2.3 KiB
Dart
90 lines
2.3 KiB
Dart
import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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class PaperAppBar extends StatelessWidget implements PreferredSizeWidget {
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final VoidCallback onClear;
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final VoidCallback? onBack;
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final VoidCallback? onRevocation;
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const PaperAppBar({
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Key? key,
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required this.onClear,
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this.onBack,
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this.onRevocation,
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}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return AppBar(
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centerTitle: true,
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elevation: 0,
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systemOverlayStyle: const SystemUiOverlayStyle(
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statusBarIconBrightness: Brightness.dark,
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statusBarColor: Colors.transparent),
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backgroundColor: Colors.white,
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leading: BackUpButtons(
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onBack: onBack,
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onRevocation: onRevocation,
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),
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leadingWidth: 100,
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title: Text(
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'画板绘制',
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style: TextStyle(color: Colors.black, fontSize: 16),
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),
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actions: [
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IconButton(
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splashRadius: 20,
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onPressed: onClear,
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icon: Icon(
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CupertinoIcons.delete,
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color: Colors.black,
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size: 20,
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))
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],
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);
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}
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@override
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Size get preferredSize => const Size.fromHeight(kToolbarHeight);
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}
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class BackUpButtons extends StatelessWidget {
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final VoidCallback? onBack;
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final VoidCallback? onRevocation;
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const BackUpButtons({
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Key? key,
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required this.onBack,
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required this.onRevocation,
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}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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const BoxConstraints cts = BoxConstraints(minHeight: 32, minWidth: 32);
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Color backColor = onBack ==null?Colors.grey:Colors.black;
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Color revocationColor = onRevocation ==null?Colors.grey:Colors.black;
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return Center(
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child: Wrap(
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children: [
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Transform.scale(
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scaleX: -1,
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child: IconButton(
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splashRadius: 20,
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constraints: cts,
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onPressed: onBack,
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icon: Icon(Icons.next_plan_outlined,color: backColor),
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),
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),
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IconButton(
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splashRadius: 20,
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onPressed: onRevocation,
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constraints: cts,
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icon: Icon(Icons.next_plan_outlined, color: revocationColor),
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)
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],
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),
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);
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}
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}
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