ToggleButtons focus,highlight,hoverElevation = 0 (flutter#75454)

Author: HansMuller

packages/flutter/lib/src/material/toggle_buttons.dart

@@ -910,12 +910,13 @@ class _ToggleButton extends StatelessWidget {
         ),
         constraints: currentConstraints,
         elevation: 0.0,
-        highlightElevation: 0.0,
         fillColor: currentFillColor,
         focusColor: currentFocusColor,
-        highlightColor: highlightColor
-          ?? theme.colorScheme.surface.withOpacity(0.0),
+        focusElevation: 0,
+        highlightColor: highlightColor ?? theme.colorScheme.surface.withOpacity(0.0),
+        highlightElevation: 0.0,
         hoverColor: currentHoverColor,
+        hoverElevation: 0,
         splashColor: currentSplashColor,
         focusNode: focusNode,
         materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,

packages/flutter/test/material/toggle_buttons_test.dart

@@ -1649,4 +1649,52 @@ void main() {
 
     expect(RendererBinding.instance!.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.basic);
   });
+
+  testWidgets('ToggleButtons focus, hover, and highlight elevations are 0', (WidgetTester tester) async {
+    final List<FocusNode> focusNodes = <FocusNode>[FocusNode(), FocusNode()];
+    await tester.pumpWidget(
+      Material(
+        child: boilerplate(
+          child: ToggleButtons(
+            isSelected: const <bool>[true, false],
+            onPressed: (int index) { },
+            focusNodes: focusNodes,
+            children: const <Widget>[Text('one'), Text('two')],
+          ),
+        ),
+      ),
+    );
+
+    double toggleButtonElevation(String text) {
+      return tester.widget<Material>(find.widgetWithText(Material, text).first).elevation;
+    }
+
+    // Default toggle button elevation
+    expect(toggleButtonElevation('one'), 0); // highlighted
+    expect(toggleButtonElevation('two'), 0); // not highlighted
+
+    // Hovered button elevation
+    final TestGesture hoverGesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
+    await hoverGesture.addPointer();
+    await hoverGesture.moveTo(tester.getCenter(find.text('one')));
+    await tester.pumpAndSettle();
+    expect(toggleButtonElevation('one'), 0);
+    await hoverGesture.moveTo(tester.getCenter(find.text('two')));
+    await tester.pumpAndSettle();
+    expect(toggleButtonElevation('two'), 0);
+
+    // Focused button elevation
+    focusNodes[0].requestFocus();
+    await tester.pumpAndSettle();
+    expect(focusNodes[0].hasFocus, isTrue);
+    expect(focusNodes[1].hasFocus, isFalse);
+    expect(toggleButtonElevation('one'), 0);
+    focusNodes[1].requestFocus();
+    await tester.pumpAndSettle();
+    expect(focusNodes[0].hasFocus, isFalse);
+    expect(focusNodes[1].hasFocus, isTrue);
+    expect(toggleButtonElevation('two'), 0);
+
+    await hoverGesture.removePointer();
+  });
 }