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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 SegmentedButtonTemplate extends TokenTemplate {
const SegmentedButtonTemplate(this.tokenGroup, super.blockName, super.fileName, super.tokens, {
super.colorSchemePrefix = '_colors.',
});
final String tokenGroup;
String _layerOpacity(String layerToken) {
if (tokens.containsKey(layerToken)) {
final String? layerValue = tokens[layerToken] as String?;
if (tokens.containsKey(layerValue)) {
final String? opacityValue = opacity(layerValue!);
if (opacityValue != null) {
return '.withOpacity($opacityValue)';
}
}
}
return '';
}
String _stateColor(String componentToken, String type, String state) {
final String baseColor = color('$componentToken.$type.$state.state-layer.color', '');
if (baseColor.isEmpty) {
return 'null';
}
final String opacity = _layerOpacity('$componentToken.$state.state-layer.opacity');
return '$baseColor$opacity';
}
@override
String generate() => '''
class _${blockName}DefaultsM3 extends SegmentedButtonThemeData {
_${blockName}DefaultsM3(this.context);
final BuildContext context;
late final ThemeData _theme = Theme.of(context);
late final ColorScheme _colors = _theme.colorScheme;
@override ButtonStyle? get style {
return ButtonStyle(
textStyle: MaterialStatePropertyAll<TextStyle?>(${textStyle('$tokenGroup.label-text')}),
backgroundColor: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return ${componentColor('$tokenGroup.disabled')};
}
if (states.contains(MaterialState.selected)) {
return ${componentColor('$tokenGroup.selected.container')};
}
return ${componentColor('$tokenGroup.unselected.container')};
}),
foregroundColor: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return ${componentColor('$tokenGroup.disabled.label-text')};
}
if (states.contains(MaterialState.selected)) {
if (states.contains(MaterialState.pressed)) {
return ${componentColor('$tokenGroup.selected.pressed.label-text')};
}
if (states.contains(MaterialState.hovered)) {
return ${componentColor('$tokenGroup.selected.hover.label-text')};
}
if (states.contains(MaterialState.focused)) {
return ${componentColor('$tokenGroup.selected.focus.label-text')};
}
return ${componentColor('$tokenGroup.selected.label-text')};
} else {
if (states.contains(MaterialState.pressed)) {
return ${componentColor('$tokenGroup.unselected.pressed.label-text')};
}
if (states.contains(MaterialState.hovered)) {
return ${componentColor('$tokenGroup.unselected.hover.label-text')};
}
if (states.contains(MaterialState.focused)) {
return ${componentColor('$tokenGroup.unselected.focus.label-text')};
}
return ${componentColor('$tokenGroup.unselected.label-text')};
}
}),
overlayColor: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
if (states.contains(MaterialState.selected)) {
if (states.contains(MaterialState.hovered)) {
return ${_stateColor(tokenGroup, 'selected', 'hover')};
}
if (states.contains(MaterialState.focused)) {
return ${_stateColor(tokenGroup, 'selected', 'focus')};
}
if (states.contains(MaterialState.pressed)) {
return ${_stateColor(tokenGroup, 'selected', 'pressed')};
}
} else {
if (states.contains(MaterialState.hovered)) {
return ${_stateColor(tokenGroup, 'unselected', 'hover')};
}
if (states.contains(MaterialState.focused)) {
return ${_stateColor(tokenGroup, 'unselected', 'focus')};
}
if (states.contains(MaterialState.pressed)) {
return ${_stateColor(tokenGroup, 'unselected', 'pressed')};
}
}
return null;
}),
surfaceTintColor: const MaterialStatePropertyAll<Color>(Colors.transparent),
elevation: const MaterialStatePropertyAll<double>(0),
iconSize: const MaterialStatePropertyAll<double?>(${tokens['$tokenGroup.with-icon.icon.size']}),
side: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return ${border("$tokenGroup.disabled.outline")};
}
return ${border("$tokenGroup.outline")};
}),
shape: const MaterialStatePropertyAll<OutlinedBorder>(${shape(tokenGroup, '')}),
minimumSize: const MaterialStatePropertyAll<Size?>(Size.fromHeight(${tokens['$tokenGroup.container.height']})),
);
}
@override
Widget? get selectedIcon => const Icon(Icons.check);
}
''';
}