Picker: add radioGroup picker style for macOS

radioGroup was somehow missed when originally implementing Picker view
Bonus: horizontalRadioGroupLayout option

Author: abra-code

ActionUI/Views/Picker.swift

@@ -8,7 +8,8 @@
      "options": [ "One",  "Two", "Three" ] // Required. Two supported formats:
        // 1. With simple array of strings we have titles only. Tags are automatically "1", "2", "3"... (1-based index as String)
        // 2. With array of dictionaries we have explicit control: [{"title": "Sure Thing", "tag": "yes"}, {"title": "Absolutely Not", "tag": "no"}]
-     "pickerStyle": "menu",      // Optional: "menu" (iOS/macOS/visionOS), "segmented" (iOS/macOS/visionOS), "wheel" (iOS/visionOS only); no default
+     "pickerStyle": "menu",      // Optional: "menu" (iOS/macOS/visionOS), "segmented" (iOS/macOS/visionOS), "wheel" (iOS/visionOS only), "radioGroup" (macOS only); no default
+     "horizontalRadioGroupLayout": false, // Optional: Bool, applies .horizontalRadioGroupLayout() when pickerStyle is "radioGroup" (macOS only); defaults to false
      "actionID": "picker.selection", // Optional: String for action triggered on user-initiated selection change (inherited from View)
    }
    // Note: actionID is triggered via onChange for user-initiated changes. Baseline View properties (padding, hidden, foregroundColor, font, background, frame, opacity, cornerRadius, disabled, etc.) are inherited and applied via ActionUIRegistry.shared.applyModifiers.
@@ -71,7 +72,7 @@ struct Picker: ActionUIViewConstruction {
 
         // Validate pickerStyle
 #if os(macOS)
-        let validStyles = ["menu", "segmented"]
+        let validStyles = ["menu", "segmented", "radioGroup"]
 #else
         let validStyles = ["menu", "segmented", "wheel"]
 #endif
@@ -140,6 +141,15 @@ struct Picker: ActionUIViewConstruction {
                 modifiedView = modifiedView.pickerStyle(.menu)
             case "segmented":
                 modifiedView = modifiedView.pickerStyle(.segmented)
+            case "radioGroup":
+#if os(macOS)
+                modifiedView = modifiedView.pickerStyle(.radioGroup)
+                if properties["horizontalRadioGroupLayout"] as? Bool == true {
+                    modifiedView = modifiedView.horizontalRadioGroupLayout()
+                }
+#else
+                logger.log("radioGroup PickerStyle unavailable on this platform; ignoring", .warning)
+#endif
             default:
                 break // Should not reach here due to validateProperties
             }

ActionUISwiftTestApp/Resources/Picker.json

@@ -35,6 +35,31 @@
         "pickerStyle": "segmented",
         "actionID": "picker.selection"
       }
+    },
+    {
+      "type": "Picker",
+      "properties": {
+        "title": "Radio Group",
+        "options": [
+          "Red",
+          "Green",
+          "Blue"
+        ],
+        "pickerStyle": "radioGroup"
+      }
+    },
+    {
+      "type": "Picker",
+      "properties": {
+        "title": "Horizontal Radio",
+        "options": [
+          "Small",
+          "Medium",
+          "Large"
+        ],
+        "pickerStyle": "radioGroup",
+        "horizontalRadioGroupLayout": true
+      }
     }
   ]
 }

ActionUITests/Views/PickerTests.swift

@@ -134,12 +134,36 @@ final class PickerTests: XCTestCase {
             "options": ["Option1", "Option2"],
             "pickerStyle": "wheel"
         ]
-        
+
         let validated = Picker.validateProperties(properties, logger)
-        
+
         XCTAssertNil(validated["pickerStyle"], "Wheel style should be nil on macOS")
         XCTAssertEqual(validated["options"] as? [String], ["Option1", "Option2"], "Options should remain valid")
     }
+
+    func testPickerRadioGroupStyleMacOS() {
+        let properties: [String: Any] = [
+            "options": ["Red", "Green", "Blue"],
+            "pickerStyle": "radioGroup"
+        ]
+
+        let validated = Picker.validateProperties(properties, logger)
+
+        XCTAssertEqual(validated["pickerStyle"] as? String, "radioGroup", "radioGroup style should be valid on macOS")
+    }
+
+    func testPickerRadioGroupHorizontalLayout() {
+        let properties: [String: Any] = [
+            "options": ["Small", "Medium", "Large"],
+            "pickerStyle": "radioGroup",
+            "horizontalRadioGroupLayout": true
+        ]
+
+        let validated = Picker.validateProperties(properties, logger)
+
+        XCTAssertEqual(validated["pickerStyle"] as? String, "radioGroup")
+        XCTAssertEqual(validated["horizontalRadioGroupLayout"] as? Bool, true)
+    }
     #endif
 
     func testPickerActionHandling() throws {

Documentation/ActionUI-JSON-Specifications.json

@@ -750,7 +750,8 @@
      "options": [ "One",  "Two", "Three" ] // Required. Two supported formats:
        // 1. With simple array of strings we have titles only. Tags are automatically "1", "2", "3"... (1-based index as String)
        // 2. With array of dictionaries we have explicit control: [{"title": "Sure Thing", "tag": "yes"}, {"title": "Absolutely Not", "tag": "no"}]
-     "pickerStyle": "menu",      // Optional: "menu" (iOS/macOS/visionOS), "segmented" (iOS/macOS/visionOS), "wheel" (iOS/visionOS only); no default
+     "pickerStyle": "menu",      // Optional: "menu" (iOS/macOS/visionOS), "segmented" (iOS/macOS/visionOS), "wheel" (iOS/visionOS only), "radioGroup" (macOS only); no default
+     "horizontalRadioGroupLayout": false, // Optional: Bool, applies .horizontalRadioGroupLayout() when pickerStyle is "radioGroup" (macOS only); defaults to false
      "actionID": "picker.selection", // Optional: String for action triggered on user-initiated selection change (inherited from View)
    }
    // Note: actionID is triggered via onChange for user-initiated changes. Baseline View properties (padding, hidden, foregroundColor, font, background, frame, opacity, cornerRadius, disabled, etc.) are inherited and applied via ActionUIRegistry.shared.applyModifiers.