Allow color customization of single togglable (#527)

Fixes #526

lib/src/controls/yaru_checkbox.dart

@@ -44,6 +44,8 @@ class YaruCheckbox extends StatefulWidget implements YaruTogglable<bool?> {
     required this.value,
     this.tristate = false,
     required this.onChanged,
+    this.selectedColor,
+    this.checkmarkColor,
     this.focusNode,
     this.autofocus = false,
   }) : assert(tristate || value != null);
@@ -100,6 +102,18 @@ class YaruCheckbox extends StatefulWidget implements YaruTogglable<bool?> {
   @override
   final ValueChanged<bool?>? onChanged;
 
+  /// The color to use when this checkbox is checked.
+  ///
+  /// Defaults to [ColorScheme.primary].
+  @override
+  final Color? selectedColor;
+
+  /// The color to use for the checkmark when this checkbox is checked.
+  ///
+  /// Defaults to [ColorScheme.onPrimary].
+  @override
+  final Color? checkmarkColor;
+
   @override
   bool get interactive => onChanged != null;
 

lib/src/controls/yaru_radio.dart

@@ -43,6 +43,8 @@ class YaruRadio<T> extends StatefulWidget implements YaruTogglable<T?> {
     required this.groupValue,
     this.toggleable = false,
     required this.onChanged,
+    this.selectedColor,
+    this.checkmarkColor,
     this.focusNode,
     this.autofocus = false,
   }) : assert(toggleable || value != null);
@@ -110,6 +112,18 @@ class YaruRadio<T> extends StatefulWidget implements YaruTogglable<T?> {
   @override
   final ValueChanged<T?>? onChanged;
 
+  /// The color to use when this radio is checked.
+  ///
+  /// Defaults to [ColorScheme.primary].
+  @override
+  final Color? selectedColor;
+
+  /// The color to use for the checkmark when this radio is checked.
+  ///
+  /// Defaults to [ColorScheme.onPrimary].
+  @override
+  final Color? checkmarkColor;
+
   @override
   bool get interactive => onChanged != null;
 

lib/src/controls/yaru_switch.dart

@@ -35,6 +35,8 @@ class YaruSwitch extends StatefulWidget implements YaruTogglable<bool> {
     super.key,
     required this.value,
     required this.onChanged,
+    this.selectedColor,
+    this.checkmarkColor,
     this.focusNode,
     this.autofocus = false,
   });
@@ -76,6 +78,18 @@ class YaruSwitch extends StatefulWidget implements YaruTogglable<bool> {
   @override
   final ValueChanged<bool>? onChanged;
 
+  /// The color to use when this switch is on.
+  ///
+  /// Defaults to [ColorScheme.primary].
+  @override
+  final Color? selectedColor;
+
+  /// The color to use for the dot when this switch is on.
+  ///
+  /// Defaults to [ColorScheme.onPrimary].
+  @override
+  final Color? checkmarkColor;
+
   @override
   bool get interactive => onChanged != null;
 

lib/src/controls/yaru_togglable.dart

@@ -23,6 +23,8 @@ abstract class YaruTogglable<T> extends StatefulWidget {
     required this.value,
     this.tristate = false,
     required this.onChanged,
+    this.selectedColor,
+    this.checkmarkColor,
     this.focusNode,
     this.autofocus = false,
   });
@@ -45,6 +47,16 @@ abstract class YaruTogglable<T> extends StatefulWidget {
   /// gets rebuilt.
   final ValueChanged<T>? onChanged;
 
+  /// The color to use when this togglable is checked.
+  ///
+  /// Defaults to [ColorScheme.primary].
+  final Color? selectedColor;
+
+  /// The color to use for the checkmark when this togglable is checked.
+  ///
+  /// Defaults to [ColorScheme.onPrimary].
+  final Color? checkmarkColor;
+
   /// Determine if this [YaruTogglable] can handle events.
   bool get interactive;
 
@@ -236,8 +248,8 @@ abstract class YaruTogglableState<S extends YaruTogglable> extends State<S>
     // Normal colors
     final uncheckedColor = colorScheme.surface;
     final uncheckedBorderColor = colorScheme.onSurface.withOpacity(.3);
-    final checkedColor = colorScheme.primary;
-    final checkmarkColor = colorScheme.onPrimary;
+    final checkedColor = widget.selectedColor ?? colorScheme.primary;
+    final checkmarkColor = widget.checkmarkColor ?? colorScheme.onPrimary;
 
     // Disabled colors
     final uncheckedDisabledColor = colorScheme.onSurface.withOpacity(.1);