Added ButtonStyle.maximumSize (flutter#80087)

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

@@ -109,6 +109,7 @@ class ButtonStyle with Diagnosticable {
     this.padding,
     this.minimumSize,
     this.fixedSize,
+    this.maximumSize,
     this.side,
     this.shape,
     this.mouseCursor,
@@ -159,18 +160,29 @@ class ButtonStyle with Diagnosticable {
   ///
   /// The size of the rectangle the button lies within may be larger
   /// per [tapTargetSize].
+  ///
+  /// This value must be less than or equal to [maximumSize].
   final MaterialStateProperty<Size?>? minimumSize;
 
   /// The button's size.
   ///
-  /// This size is still constrained by the style's [minimumSize]. Fixed
-  /// size dimensions whose value is [double.infinity] are ignored.
+  /// This size is still constrained by the style's [minimumSize]
+  /// and [maximumSize]. Fixed size dimensions whose value is
+  /// [double.infinity] are ignored.
   ///
   /// To specify buttons with a fixed width and the default height use
   /// `fixedSize: Size.fromWidth(320)`. Similarly, to specify a fixed
   /// height and the default width use `fixedSize: Size.fromHeight(100)`.
   final MaterialStateProperty<Size?>? fixedSize;
 
+  /// The maximum size of the button itself.
+  ///
+  /// A [Size.infinite] or null value for this property means that
+  /// the button's maximum size is not constrained.
+  ///
+  /// This value must be greater than or equal to [minimumSize].
+  final MaterialStateProperty<Size?>? maximumSize;
+
   /// The color and weight of the button's outline.
   ///
   /// This value is combined with [shape] to create a shape decorated
@@ -259,6 +271,7 @@ class ButtonStyle with Diagnosticable {
     MaterialStateProperty<EdgeInsetsGeometry?>? padding,
     MaterialStateProperty<Size?>? minimumSize,
     MaterialStateProperty<Size?>? fixedSize,
+    MaterialStateProperty<Size?>? maximumSize,
     MaterialStateProperty<BorderSide?>? side,
     MaterialStateProperty<OutlinedBorder?>? shape,
     MaterialStateProperty<MouseCursor?>? mouseCursor,
@@ -279,6 +292,7 @@ class ButtonStyle with Diagnosticable {
       padding: padding ?? this.padding,
       minimumSize: minimumSize ?? this.minimumSize,
       fixedSize: fixedSize ?? this.fixedSize,
+      maximumSize: maximumSize ?? this.maximumSize,
       side: side ?? this.side,
       shape: shape ?? this.shape,
       mouseCursor: mouseCursor ?? this.mouseCursor,
@@ -309,6 +323,7 @@ class ButtonStyle with Diagnosticable {
       padding: padding ?? style.padding,
       minimumSize: minimumSize ?? style.minimumSize,
       fixedSize: fixedSize ?? style.fixedSize,
+      maximumSize: maximumSize ?? style.maximumSize,
       side: side ?? style.side,
       shape: shape ?? style.shape,
       mouseCursor: mouseCursor ?? style.mouseCursor,
@@ -333,6 +348,7 @@ class ButtonStyle with Diagnosticable {
       padding,
       minimumSize,
       fixedSize,
+      maximumSize,
       side,
       shape,
       mouseCursor,
@@ -361,6 +377,7 @@ class ButtonStyle with Diagnosticable {
         && other.padding == padding
         && other.minimumSize == minimumSize
         && other.fixedSize == fixedSize
+        && other.maximumSize == maximumSize
         && other.side == side
         && other.shape == shape
         && other.mouseCursor == mouseCursor
@@ -384,6 +401,7 @@ class ButtonStyle with Diagnosticable {
     properties.add(DiagnosticsProperty<MaterialStateProperty<EdgeInsetsGeometry?>>('padding', padding, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<Size?>>('minimumSize', minimumSize, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<Size?>>('fixedSize', fixedSize, defaultValue: null));
+    properties.add(DiagnosticsProperty<MaterialStateProperty<Size?>>('maximumSize', maximumSize, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<BorderSide?>>('side', side, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<OutlinedBorder?>>('shape', shape, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<MouseCursor?>>('mouseCursor', mouseCursor, defaultValue: null));
@@ -409,6 +427,7 @@ class ButtonStyle with Diagnosticable {
       padding:  _lerpProperties<EdgeInsetsGeometry?>(a?.padding, b?.padding, t, EdgeInsetsGeometry.lerp),
       minimumSize: _lerpProperties<Size?>(a?.minimumSize, b?.minimumSize, t, Size.lerp),
       fixedSize: _lerpProperties<Size?>(a?.fixedSize, b?.fixedSize, t, Size.lerp),
+      maximumSize: _lerpProperties<Size?>(a?.maximumSize, b?.maximumSize, t, Size.lerp),
       side: _lerpSides(a?.side, b?.side, t),
       shape: _lerpShapes(a?.shape, b?.shape, t),
       mouseCursor: t < 0.5 ? a?.mouseCursor : b?.mouseCursor,

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

@@ -268,6 +268,7 @@ class _ButtonStyleState extends State<ButtonStyleButton> with TickerProviderStat
     final EdgeInsetsGeometry? resolvedPadding = resolve<EdgeInsetsGeometry?>((ButtonStyle? style) => style?.padding);
     final Size? resolvedMinimumSize = resolve<Size?>((ButtonStyle? style) => style?.minimumSize);
     final Size? resolvedFixedSize = resolve<Size?>((ButtonStyle? style) => style?.fixedSize);
+    final Size? resolvedMaximumSize = resolve<Size?>((ButtonStyle? style) => style?.maximumSize);
     final BorderSide? resolvedSide = resolve<BorderSide?>((ButtonStyle? style) => style?.side);
     final OutlinedBorder? resolvedShape = resolve<OutlinedBorder?>((ButtonStyle? style) => style?.shape);
 
@@ -291,6 +292,8 @@ class _ButtonStyleState extends State<ButtonStyleButton> with TickerProviderStat
       BoxConstraints(
         minWidth: resolvedMinimumSize!.width,
         minHeight: resolvedMinimumSize.height,
+        maxWidth: resolvedMaximumSize!.width,
+        maxHeight: resolvedMaximumSize.height,
       ),
     );
     if (resolvedFixedSize != null) {

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

@@ -174,6 +174,7 @@ class ElevatedButton extends ButtonStyleButton {
     EdgeInsetsGeometry? padding,
     Size? minimumSize,
     Size? fixedSize,
+    Size? maximumSize,
     BorderSide? side,
     OutlinedBorder? shape,
     MouseCursor? enabledMouseCursor,
@@ -211,6 +212,7 @@ class ElevatedButton extends ButtonStyleButton {
       padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
       minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
       fixedSize: ButtonStyleButton.allOrNull<Size>(fixedSize),
+      maximumSize: ButtonStyleButton.allOrNull<Size>(maximumSize),
       side: ButtonStyleButton.allOrNull<BorderSide>(side),
       shape: ButtonStyleButton.allOrNull<OutlinedBorder>(shape),
       mouseCursor: mouseCursor,
@@ -270,6 +272,7 @@ class ElevatedButton extends ButtonStyleButton {
   ///   * `3 < textScaleFactor` - horizontal(4)
   /// * `minimumSize` - Size(64, 36)
   /// * `fixedSize` - null
+  /// * `maximumSize` - Size.infinite
   /// * `side` - null
   /// * `shape` - RoundedRectangleBorder(borderRadius: BorderRadius.circular(4))
   /// * `mouseCursor`
@@ -315,6 +318,7 @@ class ElevatedButton extends ButtonStyleButton {
       textStyle: theme.textTheme.button,
       padding: scaledPadding,
       minimumSize: const Size(64, 36),
+      maximumSize: Size.infinite,
       side: null,
       shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(4))),
       enabledMouseCursor: SystemMouseCursors.click,

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

@@ -149,6 +149,7 @@ class OutlinedButton extends ButtonStyleButton {
     EdgeInsetsGeometry? padding,
     Size? minimumSize,
     Size? fixedSize,
+    Size? maximumSize,
     BorderSide? side,
     OutlinedBorder? shape,
     MouseCursor? enabledMouseCursor,
@@ -180,6 +181,7 @@ class OutlinedButton extends ButtonStyleButton {
       padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
       minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
       fixedSize: ButtonStyleButton.allOrNull<Size>(fixedSize),
+      maximumSize: ButtonStyleButton.allOrNull<Size>(maximumSize),
       side: ButtonStyleButton.allOrNull<BorderSide>(side),
       shape: ButtonStyleButton.allOrNull<OutlinedBorder>(shape),
       mouseCursor: mouseCursor,
@@ -232,6 +234,7 @@ class OutlinedButton extends ButtonStyleButton {
   ///   * `3 < textScaleFactor` - horizontal(4)
   /// * `minimumSize` - Size(64, 36)
   /// * `fixedSize` - null
+  /// * `maximumSize` - Size.infinite
   /// * `side` - BorderSide(width: 1, color: Theme.colorScheme.onSurface(0.12))
   /// * `shape` - RoundedRectangleBorder(borderRadius: BorderRadius.circular(4))
   /// * `mouseCursor`
@@ -264,6 +267,7 @@ class OutlinedButton extends ButtonStyleButton {
       textStyle: theme.textTheme.button,
       padding: scaledPadding,
       minimumSize: const Size(64, 36),
+      maximumSize: Size.infinite,
       side: BorderSide(
         color: Theme.of(context).colorScheme.onSurface.withOpacity(0.12),
         width: 1,

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

@@ -203,6 +203,7 @@ class TextButton extends ButtonStyleButton {
     EdgeInsetsGeometry? padding,
     Size? minimumSize,
     Size? fixedSize,
+    Size? maximumSize,
     BorderSide? side,
     OutlinedBorder? shape,
     MouseCursor? enabledMouseCursor,
@@ -234,6 +235,7 @@ class TextButton extends ButtonStyleButton {
       padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
       minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
       fixedSize: ButtonStyleButton.allOrNull<Size>(fixedSize),
+      maximumSize: ButtonStyleButton.allOrNull<Size>(maximumSize),
       side: ButtonStyleButton.allOrNull<BorderSide>(side),
       shape: ButtonStyleButton.allOrNull<OutlinedBorder>(shape),
       mouseCursor: mouseCursor,
@@ -289,6 +291,7 @@ class TextButton extends ButtonStyleButton {
   ///   * `3 < textScaleFactor` - horizontal(4)
   /// * `minimumSize` - Size(64, 36)
   /// * `fixedSize` - null
+  /// * `maximumSize` - Size.infinite
   /// * `side` - null
   /// * `shape` - RoundedRectangleBorder(borderRadius: BorderRadius.circular(4))
   /// * `mouseCursor`
@@ -333,6 +336,7 @@ class TextButton extends ButtonStyleButton {
       textStyle: theme.textTheme.button,
       padding: scaledPadding,
       minimumSize: const Size(64, 36),
+      maximumSize: Size.infinite,
       side: null,
       shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(4))),
       enabledMouseCursor: SystemMouseCursors.click,

packages/flutter/test/material/button_style_test.dart

@@ -24,6 +24,7 @@ void main() {
     expect(style.padding, null);
     expect(style.minimumSize, null);
     expect(style.fixedSize, null);
+    expect(style.maximumSize, null);
     expect(style.side, null);
     expect(style.shape, null);
     expect(style.mouseCursor, null);
@@ -56,6 +57,7 @@ void main() {
       padding: MaterialStateProperty.all<EdgeInsets>(const EdgeInsets.all(1.0)),
       minimumSize: MaterialStateProperty.all<Size>(const Size(1.0, 2.0)),
       side: MaterialStateProperty.all<BorderSide>(const BorderSide(width: 4.0, color: Color(0xfffffff4))),
+      maximumSize: MaterialStateProperty.all<Size>(const Size(100.0, 200.0)),
       shape: MaterialStateProperty.all<OutlinedBorder>(const StadiumBorder()),
       mouseCursor: MaterialStateProperty.all<MouseCursor>(SystemMouseCursors.forbidden),
       tapTargetSize: MaterialTapTargetSize.shrinkWrap,
@@ -76,6 +78,7 @@ void main() {
       'elevation: MaterialStateProperty.all(1.5)',
       'padding: MaterialStateProperty.all(EdgeInsets.all(1.0))',
       'minimumSize: MaterialStateProperty.all(Size(1.0, 2.0))',
+      'maximumSize: MaterialStateProperty.all(Size(100.0, 200.0))',
       'side: MaterialStateProperty.all(BorderSide(Color(0xfffffff4), 4.0, BorderStyle.solid))',
       'shape: MaterialStateProperty.all(StadiumBorder(BorderSide(Color(0xff000000), 0.0, BorderStyle.none)))',
       'mouseCursor: MaterialStateProperty.all(SystemMouseCursor(forbidden))',
@@ -94,6 +97,7 @@ void main() {
     final MaterialStateProperty<EdgeInsets> padding = MaterialStateProperty.all<EdgeInsets>(const EdgeInsets.all(1));
     final MaterialStateProperty<Size> minimumSize = MaterialStateProperty.all<Size>(const Size(1, 2));
     final MaterialStateProperty<Size> fixedSize = MaterialStateProperty.all<Size>(const Size(3, 4));
+    final MaterialStateProperty<Size> maximumSize = MaterialStateProperty.all<Size>(const Size(5, 6));
     final MaterialStateProperty<BorderSide> side = MaterialStateProperty.all<BorderSide>(const BorderSide());
     final MaterialStateProperty<OutlinedBorder> shape  = MaterialStateProperty.all<OutlinedBorder>(const StadiumBorder());
     final MaterialStateProperty<MouseCursor> mouseCursor = MaterialStateProperty.all<MouseCursor>(SystemMouseCursors.forbidden);
@@ -111,6 +115,7 @@ void main() {
       padding: padding,
       minimumSize: minimumSize,
       fixedSize: fixedSize,
+      maximumSize: maximumSize,
       side: side,
       shape: shape,
       mouseCursor: mouseCursor,
@@ -131,6 +136,7 @@ void main() {
         padding: padding,
         minimumSize: minimumSize,
         fixedSize: fixedSize,
+        maximumSize: maximumSize,
         side: side,
         shape: shape,
         mouseCursor: mouseCursor,

packages/flutter/test/material/elevated_button_test.dart

@@ -1172,6 +1172,77 @@ void main() {
     expect(tester.getRect(find.byKey(iconKey)), const Rect.fromLTRB(46.0, 0.0, 96.0, 100.0));
     expect(tester.getRect(find.byKey(labelKey)), const Rect.fromLTRB(104.0, 0.0, 154.0, 100.0));
   });
+
+  testWidgets('ElevatedButton maximumSize', (WidgetTester tester) async {
+    final Key key0 = UniqueKey();
+    final Key key1 = UniqueKey();
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: Center(
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              children: <Widget>[
+                ElevatedButton(
+                  key: key0,
+                  style: TextButton.styleFrom(
+                    minimumSize: const Size(24, 36),
+                    maximumSize: const Size.fromWidth(64),
+                  ),
+                  onPressed: () { },
+                  child: const Text('A B C D E F G H I J K L M N O P'),
+                ),
+                ElevatedButton.icon(
+                  key: key1,
+                  style: TextButton.styleFrom(
+                    minimumSize: const Size(24, 36),
+                    maximumSize: const Size.fromWidth(104),
+                  ),
+                  onPressed: () {},
+                  icon: Container(color: Colors.red, width: 32, height: 32),
+                  label: const Text('A B C D E F G H I J K L M N O P'),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+
+    expect(tester.getSize(find.byKey(key0)), const Size(64.0, 224.0));
+    expect(tester.getSize(find.byKey(key1)), const Size(104.0, 224.0));
+  });
+
+  testWidgets('Fixed size ElevatedButton, same as minimumSize == maximumSize', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: <Widget>[
+              ElevatedButton(
+                style: ElevatedButton.styleFrom(fixedSize: const Size(200, 200)),
+                onPressed: () { },
+                child: const Text('200x200'),
+              ),
+              ElevatedButton(
+                style: ElevatedButton.styleFrom(
+                  minimumSize: const Size(200, 200),
+                  maximumSize: const Size(200, 200),
+                ),
+                onPressed: () { },
+                child: const Text('200,200'),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+
+    expect(tester.getSize(find.widgetWithText(ElevatedButton, '200x200')), const Size(200, 200));
+    expect(tester.getSize(find.widgetWithText(ElevatedButton, '200,200')), const Size(200, 200));
+  });
 }
 
 TextStyle _iconStyle(WidgetTester tester, IconData icon) {