[rfw] Material slider widget (flutter#6610)

### Description
This adds Slider widget to material widgets.

packages/rfw/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.29
+
+* Adds support for the `Slider` Material widget.
+
 ## 1.0.28
 
 * Updates documentation to WidgetStateProperty and ButtonBar.

packages/rfw/lib/src/flutter/material_widgets.dart

@@ -37,6 +37,7 @@ import 'runtime.dart';
 ///  * [Material]
 ///  * [OutlinedButton]
 ///  * [Scaffold]
+///  * [Slider]
 ///  * [TextButton]
 ///  * [VerticalDivider]
 ///  * [OverflowBar]
@@ -499,6 +500,39 @@ Map<String, LocalWidgetBuilder> get _materialWidgetsDefinitions => <String, Loca
     );
   },
 
+  'Slider': (BuildContext context, DataSource source) {
+    // not implemented: overlayColor, mouseCursor, semanticFormatterCallback, focusNode, autofocus
+    final min = source.v<double>(['min']) ?? 0.0;
+    final value = source.v<double>(['value']) ?? min;
+    final labelText = source.v<String>(['label']);
+    final label = labelText != null ? '$labelText: ${value.toStringAsFixed(2)}' : value.toStringAsFixed(2);
+    return Slider(
+      value: value,
+      secondaryTrackValue: source.v<double>(['secondaryTrackValue']),
+      onChanged: source.handler(['onChanged'],
+          (HandlerTrigger trigger) => (double value) {
+            trigger({'value': value});
+          }),
+      onChangeStart: source.handler(['onChangeStart'],
+          (HandlerTrigger trigger) => (double value) {
+            trigger({'value': value});
+          }),
+      onChangeEnd: source.handler(['onChangeEnd'],
+          (HandlerTrigger trigger) => (double value) {
+            trigger({'value': value});
+          }),
+      min: min,
+      max: source.v<double>(['max']) ?? 1.0,
+      divisions: source.v<int>(['divisions']),
+      label: label,
+      activeColor: ArgumentDecoders.color(source, ['activeColor']),
+      inactiveColor: ArgumentDecoders.color(source, ['inactiveColor']),
+      secondaryActiveColor: ArgumentDecoders.color(source, ['secondaryActiveColor']),
+      thumbColor: ArgumentDecoders.color(source, ['thumbColor']),
+      allowedInteraction: ArgumentDecoders.enumValue<SliderInteraction>(SliderInteraction.values, source, ['allowedInteraction']),
+    );
+  },
+
   'TextButton': (BuildContext context, DataSource source) {
     // not implemented: buttonStyle, focusNode
     return TextButton(

packages/rfw/pubspec.yaml

@@ -2,7 +2,7 @@ name: rfw
 description: "Remote Flutter widgets: a library for rendering declarative widget description files at runtime."
 repository: https://github.com/flutter/packages/tree/main/packages/rfw
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+rfw%22
-version: 1.0.28
+version: 1.0.29
 
 environment:
   sdk: ^3.2.0

packages/rfw/test/material_widgets_test.dart

@@ -586,4 +586,101 @@ void main() {
     expect(tester.widget<Material>(find.byType(Material)).clipBehavior,
         Clip.antiAlias);
   });
+
+  testWidgets('Slider properties', (WidgetTester tester) async {
+    final Runtime runtime = setupRuntime();
+    final DynamicContent data = DynamicContent();
+    final List<String> eventLog = <String>[];
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(useMaterial3: false),
+        home: RemoteWidget(
+          runtime: runtime,
+          data: data,
+          widget: const FullyQualifiedWidgetName(testName, 'root'),
+          onEvent: (String eventName, DynamicMap eventArguments) {
+            eventLog.add('$eventName $eventArguments');
+          },
+        ),
+      ),
+    );
+    expect(
+      tester.takeException().toString(),
+      contains('Could not find remote widget named'),
+    );
+
+    runtime.update(testName, parseLibraryFile('''
+      import core;
+      import material;
+      widget root = Scaffold(
+        body: Center(
+          child: Slider(
+          onChanged: event 'slider' {  },
+          min: 10.0,
+          max: 100.0,
+          divisions: 100,
+          value: 20.0,
+          activeColor: 0xFF0000FF,
+          inactiveColor: 0xFF00FF00,
+          secondaryActiveColor: 0xFFFF0000,
+          thumbColor: 0xFF000000,
+      )));
+    '''));
+    await tester.pump();
+
+    final Finder sliderFinder = find.byType(Slider);
+    final Slider slider = tester.widget<Slider>(sliderFinder);
+    expect(slider.value, 20.0);
+    expect(slider.min, 10.0);
+    expect(slider.max, 100.0);
+    expect(slider.divisions, 100);
+    expect(slider.activeColor, const Color(0xFF0000FF));
+    expect(slider.inactiveColor, const Color(0xFF00FF00));
+    expect(slider.secondaryActiveColor, const Color(0xFFFF0000));
+    expect(slider.thumbColor, const Color(0xFF000000));
+
+    runtime.update(testName, parseLibraryFile('''
+      import core;
+      import material;
+      
+      widget root = Scaffold(
+          body: Container(    
+            child: Slider(
+            onChanged: event 'slider' {  },
+            onChangeStart: event 'slider.start' {  },
+            onChangeEnd: event 'slider.end' {  },
+            min: 0.0,
+            max: 100.0,
+            divisions: 100,
+            value: 0.0,
+        )));
+    '''));
+    await tester.pump();
+
+    //drag slider
+    await _slideToValue(tester, sliderFinder, 20.0);
+    await tester.pumpAndSettle();
+    expect(eventLog,
+        contains(kIsWeb ? 'slider {value: 20}' : 'slider {value: 20.0}'));
+    expect(
+        eventLog,
+        contains(
+            kIsWeb ? 'slider.start {value: 0}' : 'slider.start {value: 0.0}'));
+    expect(
+        eventLog,
+        contains(
+            kIsWeb ? 'slider.end {value: 20}' : 'slider.end {value: 20.0}'));
+  });
+}
+
+// slide to value for material slider in tests
+Future<void> _slideToValue(
+    WidgetTester widgetTester, Finder slider, double value,
+    {double paddingOffset = 24.0}) async {
+  final Offset zeroPoint = widgetTester.getTopLeft(slider) +
+      Offset(paddingOffset, widgetTester.getSize(slider).height / 2);
+  final double totalWidth =
+      widgetTester.getSize(slider).width - (2 * paddingOffset);
+  final double calculateOffset = value * (totalWidth / 100);
+  await widgetTester.dragFrom(zeroPoint, Offset(calculateOffset, 0));
 }