Accessibility: Send AccessibilityEvent::valueChanged when ComboBox selection is changed

modules/juce_gui_basics/widgets/juce_ComboBox.cpp

@@ -622,6 +622,9 @@ void ComboBox::handleAsyncUpdate()
 
     if (onChange != nullptr)
         onChange();
+
+    if (auto* handler = getAccessibilityHandler())
+        handler->notifyAccessibilityEvent (AccessibilityEvent::valueChanged);
 }
 
 void ComboBox::sendChange (const NotificationType notification)
@@ -646,7 +649,8 @@ public:
     explicit ComboBoxAccessibilityHandler (ComboBox& comboBoxToWrap)
         : AccessibilityHandler (comboBoxToWrap,
                                 AccessibilityRole::comboBox,
-                                getAccessibilityActions (comboBoxToWrap)),
+                                getAccessibilityActions (comboBoxToWrap),
+                                { std::make_unique<ComboBoxValueInterface> (comboBoxToWrap) }),
           comboBox (comboBoxToWrap)
     {
     }
@@ -662,6 +666,25 @@ public:
     String getHelp() const override   { return comboBox.getTooltip(); }
 
 private:
+    class ComboBoxValueInterface  : public AccessibilityTextValueInterface
+    {
+    public:
+        explicit ComboBoxValueInterface (ComboBox& comboBoxToWrap)
+            : comboBox (comboBoxToWrap)
+        {
+        }
+
+        bool isReadOnly() const override                 { return true; }
+        String getCurrentValueAsString() const override  { return comboBox.getText(); }
+        void setValueAsString (const String&) override   {}
+
+    private:
+        ComboBox& comboBox;
+
+        //==============================================================================
+        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ComboBoxValueInterface)
+    };
+
     static AccessibilityActions getAccessibilityActions (ComboBox& comboBox)
     {
         return AccessibilityActions().addAction (AccessibilityActionType::press,    [&comboBox] { comboBox.showPopup(); })