feat(core): added new dropdown attributes: borderRadius, enableFeedback, alignment. Fixes #1011

Author: danvick

packages/flutter_form_builder/lib/src/fields/form_builder_dropdown.dart

@@ -1,6 +1,5 @@
 import 'package:collection/collection.dart' show IterableExtension;
 import 'package:flutter/material.dart';
-
 import 'package:flutter_form_builder/flutter_form_builder.dart';
 
 /// Field for Dropdown button
@@ -194,8 +193,40 @@ class FormBuilderDropdown<T> extends FormBuilderField<T> {
 
   final bool shouldRequestFocus;
 
+  /// Whether detected gestures should provide acoustic and/or haptic feedback.
+  ///
+  /// For example, on Android a tap will produce a clicking sound and a
+  /// long-press will produce a short vibration, when feedback is enabled.
+  ///
+  /// By default, platform-specific feedback is enabled.
+  ///
+  /// See also:
+  ///
+  ///  * [Feedback] for providing platform-specific feedback to certain actions.
+  final bool? enableFeedback;
+
+  /// Defines how the hint or the selected item is positioned within the button.
+  ///
+  /// This property must not be null. It defaults to [AlignmentDirectional.centerStart].
+  ///
+  /// See also:
+  ///
+  ///  * [Alignment], a class with convenient constants typically used to
+  ///    specify an [AlignmentGeometry].
+  ///  * [AlignmentDirectional], like [Alignment] for specifying alignments
+  ///    relative to text direction.
+  final AlignmentGeometry alignment;
+
+  /// Defines the corner radii of the menu's rounded rectangle shape.
+  ///
+  /// The radii of the first menu item's top left and right corners are
+  /// defined by the corresponding properties of the [borderRadius].
+  /// Similarly, the radii of the last menu item's bottom and right corners
+  /// are defined by the corresponding properties of the [borderRadius].
+  final BorderRadius? borderRadius;
+
   /// Creates field for Dropdown button
-  FormBuilderDropdown({
+  FormBuilderDropdown( {
     Key? key,
     //From Super
     required String name,
@@ -230,6 +261,9 @@ class FormBuilderDropdown<T> extends FormBuilderField<T> {
     this.itemHeight = kMinInteractiveDimension,
     this.selectedItemBuilder,
     this.menuMaxHeight,
+    this.enableFeedback,
+    this.borderRadius,
+    this.alignment = AlignmentDirectional.centerStart,
   }) : /*: assert(allowClear == true || clearIcon != null)*/ super(
           key: key,
           initialValue: initialValue,
@@ -296,6 +330,9 @@ class FormBuilderDropdown<T> extends FormBuilderField<T> {
                         itemHeight: itemHeight,
                         selectedItemBuilder: selectedItemBuilder,
                         menuMaxHeight: menuMaxHeight,
+                        borderRadius: borderRadius,
+                        enableFeedback: enableFeedback,
+                        alignment: alignment,
                       ),
                     ),
                   ),