admin1
99 lines
2.2 KiB
Dart
99 lines
2.2 KiB
Dart
import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:window_manager/window_manager.dart';
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class TopDragArea extends StatefulWidget {
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final Widget child;
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final double topResizeZone;
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final bool enabled;
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const TopDragArea({
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super.key,
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required this.child,
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this.topResizeZone = 6,
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this.enabled = true,
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});
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@override
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State<TopDragArea> createState() => _TopDragAreaState();
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}
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class _TopDragAreaState extends State<TopDragArea> with WindowListener {
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bool _isMaximized = false;
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bool get _supported =>
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widget.enabled && (Platform.isMacOS || Platform.isWindows);
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@override
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void initState() {
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super.initState();
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if (_supported) {
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windowManager.addListener(this);
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_syncMaximized();
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}
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}
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@override
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void dispose() {
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if (Platform.isMacOS || Platform.isWindows) {
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windowManager.removeListener(this);
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}
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super.dispose();
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}
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Future<void> _syncMaximized() async {
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try {
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final maximized = await windowManager.isMaximized();
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if (!mounted) return;
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if (maximized != _isMaximized) {
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setState(() => _isMaximized = maximized);
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}
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} catch (_) {}
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}
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@override
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void onWindowMaximize() {
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if (mounted) setState(() => _isMaximized = true);
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}
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@override
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void onWindowUnmaximize() {
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if (mounted) setState(() => _isMaximized = false);
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}
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@override
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Widget build(BuildContext context) {
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if (!_supported) return widget.child;
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final showResizeZone =
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Platform.isWindows && !_isMaximized && widget.topResizeZone > 0;
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final deadZone = showResizeZone ? widget.topResizeZone : 0.0;
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return Stack(
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children: [
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Padding(
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padding: EdgeInsets.only(top: deadZone),
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child: DragToMoveArea(child: widget.child),
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),
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if (showResizeZone)
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Positioned(
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top: 0,
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left: 0,
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right: 0,
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height: deadZone,
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child: MouseRegion(
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cursor: SystemMouseCursors.resizeUp,
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child: GestureDetector(
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behavior: HitTestBehavior.opaque,
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onPanStart: (_) => windowManager.startResizing(ResizeEdge.top),
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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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}
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