CXTDT-553663 - DropdownSelect - Accessibility - 5 issues

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDS/Components/DropdownSelect/DropdownSelect.swift

@@ -103,8 +103,6 @@ open class DropdownSelect: EntryFieldBase {
     open override func setup() {
         super.setup()      
         
-        accessibilityLabel = "Dropdown Select"
-        
         // stackview for controls in EntryFieldBase.controlContainerView
         let controlStackView = UIStackView().with {
             $0.translatesAutoresizingMaskIntoConstraints = false
@@ -118,6 +116,10 @@ open class DropdownSelect: EntryFieldBase {
         controlStackView.addArrangedSubview(inlineDisplayLabel)
         controlStackView.addArrangedSubview(selectedOptionLabel)
         
+        containerStackView.isAccessibilityElement = true
+        containerStackView.accessibilityLabel = "Dropdown Select"
+        inlineDisplayLabel.isAccessibilityElement = true
+
         controlStackView.setCustomSpacing(0, after: dropdownField)
         controlStackView.setCustomSpacing(VDSLayout.space1X, after: inlineDisplayLabel)
         controlStackView.setCustomSpacing(VDSLayout.space3X, after: selectedOptionLabel)
@@ -245,9 +247,41 @@ open class DropdownSelect: EntryFieldBase {
         statusIcon.color = iconColorConfiguration.getColor(self)
     }
     
+    open override func updateAccessibility() {
+        super.updateAccessibility()
+        var selectedOption = selectedOptionLabel.text ?? ""
+        containerStackView.accessibilityLabel = "Dropdown Select, \(selectedOption) \(isReadOnly ? ", read only" : "")"
+        containerStackView.accessibilityHint = isReadOnly || !isEnabled ? "" : "Double tap to open."
+    }
+    
+    open override var accessibilityElements: [Any]? {
+        get {
+            var elements = [Any]()
+            elements.append(contentsOf: [titleLabel, containerStackView])
+            
+            if showError {
+                elements.append(statusIcon)
+                if let errorText, !errorText.isEmpty {
+                    elements.append(errorLabel)
+                }
+            }
+            
+            if let helperText, !helperText.isEmpty {
+                elements.append(helperLabel)
+            }
+            
+            return elements
+        }
+        
+        set { super.accessibilityElements = newValue }
+    }
+
+    
     @objc open func pickerDoneClicked() {
         optionsPicker.isHidden = true
         dropdownField.resignFirstResponder()
+        setNeedsUpdate()
+        UIAccessibility.post(notification: .layoutChanged, argument: containerStackView)
     }
 }
 
@@ -258,6 +292,7 @@ extension DropdownSelect: UIPickerViewDelegate, UIPickerViewDataSource {
     
     internal func launchPicker() {
         if optionsPicker.isHidden {
+            UIAccessibility.post(notification: .layoutChanged, argument: optionsPicker)
             dropdownField.becomeFirstResponder()
         } else {
             dropdownField.resignFirstResponder()