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navigation_bar_template.dart
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/
navigation_bar_template.dart
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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'template.dart';
class NavigationBarTemplate extends TokenTemplate {
const NavigationBarTemplate(super.blockName, super.fileName, super.tokens, {
super.colorSchemePrefix = '_colors.',
super.textThemePrefix = '_textTheme.',
});
@override
String generate() => '''
class _${blockName}DefaultsM3 extends NavigationBarThemeData {
_${blockName}DefaultsM3(this.context)
: super(
height: ${tokens["md.comp.navigation-bar.container.height"]},
elevation: ${elevation("md.comp.navigation-bar.container")},
labelBehavior: NavigationDestinationLabelBehavior.alwaysShow,
);
final BuildContext context;
late final ColorScheme _colors = Theme.of(context).colorScheme;
late final TextTheme _textTheme = Theme.of(context).textTheme;
@override Color? get backgroundColor => ${componentColor("md.comp.navigation-bar.container")};
@override Color? get shadowColor => ${colorOrTransparent("md.comp.navigation-bar.container.shadow-color")};
@override Color? get surfaceTintColor => ${colorOrTransparent("md.comp.navigation-bar.container.surface-tint-layer.color")};
@override MaterialStateProperty<IconThemeData?>? get iconTheme {
return MaterialStateProperty.resolveWith((Set<MaterialState> states) {
return IconThemeData(
size: ${tokens["md.comp.navigation-bar.icon.size"]},
color: states.contains(MaterialState.selected)
? ${componentColor("md.comp.navigation-bar.active.icon")}
: ${componentColor("md.comp.navigation-bar.inactive.icon")},
);
});
}
@override Color? get indicatorColor => ${componentColor("md.comp.navigation-bar.active-indicator")};
@override ShapeBorder? get indicatorShape => ${shape("md.comp.navigation-bar.active-indicator")};
@override MaterialStateProperty<TextStyle?>? get labelTextStyle {
return MaterialStateProperty.resolveWith((Set<MaterialState> states) {
final TextStyle style = ${textStyle("md.comp.navigation-bar.label-text")}!;
return style.apply(color: states.contains(MaterialState.selected)
? ${componentColor("md.comp.navigation-bar.active.label-text")}
: ${componentColor("md.comp.navigation-bar.inactive.label-text")}
);
});
}
}
''';
}