48 lines
1.6 KiB
Dart
48 lines
1.6 KiB
Dart
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// What a page needs from the shell (lib/shell.dart), without importing it: open the
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// menu, switch view. Pages import this; the shell imports the pages.
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import 'package:flutter/material.dart';
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/// Every view the menu offers. Tools are the rarely used ones (pirate-station-aide's pattern).
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enum ShellView { dash, signals, captures, camera, linkTest, settings }
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/// The landing view, set at build time: `--dart-define=YUKART_HOME=dash` for the car,
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/// `signals` (the default, for now) while developing.
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ShellView get landingView => switch (const String.fromEnvironment(
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'YUKART_HOME',
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defaultValue: 'signals',
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)) {
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'dash' => ShellView.dash,
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_ => ShellView.signals,
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};
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/// The view on screen. The shell listens to it; anything may set it (the link-test hook does).
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final shellView = ValueNotifier<ShellView>(landingView);
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class ShellScope extends InheritedWidget {
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const ShellScope({super.key, required this.openMenu, required super.child});
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final VoidCallback openMenu;
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static ShellScope? maybeOf(BuildContext context) =>
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context.dependOnInheritedWidgetOfExactType<ShellScope>();
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@override
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bool updateShouldNotify(ShellScope old) => false;
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}
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/// The menu button every page puts where a back arrow would be. The menu also opens
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/// with a swipe in from the left edge.
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class MenuButton extends StatelessWidget {
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const MenuButton({super.key, this.color});
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final Color? color;
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@override
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Widget build(BuildContext context) => IconButton(
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tooltip: 'Menu',
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icon: Icon(Icons.menu, color: color),
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onPressed: ShellScope.maybeOf(context)?.openMenu,
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);
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}
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