Adding onCancel handler (new attempt)

README.md

@@ -191,6 +191,7 @@ void _startAnimation(ScrollController controller) {
 | `listType` | MultiSelectListType | Change the listType. Can be either  `MultiSelectListType.LIST` or `MultiSelectListType.CHIP` |
 | `onSelectionChanged` | Function(List\<V>) | Fires when an item is selected or unselected. |
 | `onConfirm` | Function(List<V>) | Fires when the confirm button is pressed. |
+| `onCancel` | Function(List<V>) | Fires when the cancel button is pressed. |
 | `searchable` | bool | Enables search functionality within the dialog. |
 | `searchHintStyle` | TextStyle | Style the text of the search hint. |
 | `searchIcon` | Icon | The icon button that shows the search field. |
@@ -235,6 +236,7 @@ MultiSelectDialogField has all the parameters of MultiSelectDialog plus these ex
 | `minChildSize` | double | Set the minimum height threshold of the BottomSheet before it closes. Default is 0.3 |
 | `onSelectionChanged` | Function(List\<V>) | Fires when an item is selected or unselected. |
 | `onConfirm` | Function(List<V>) | Fires when the confirm button is pressed. |
+| `onCancel` | Function(List<V>) | Fires when the cancel button is pressed. |
 | `searchable` | bool | Toggle search functionality within the BottomSheet. |
 | `searchHint` | String | Set the placeholder text of the search field. |
 | `searchHintStyle` | TextStyle | Style the text of the search hint. |

example/lib/main.dart

@@ -121,6 +121,9 @@ class _MyHomePageState extends State<MyHomePage> {
                     fontSize: 16,
                   ),
                 ),
+                onCancel: (results) {
+                  print(results);
+                },
                 onConfirm: (results) {
                   //_selectedAnimals = results;
                 },

lib/bottom_sheet/multi_select_bottom_sheet.dart

@@ -21,6 +21,9 @@ class MultiSelectBottomSheet<T> extends StatefulWidget
   /// Fires when confirm is tapped.
   final void Function(List<T>)? onConfirm;
 
+  /// Fires when cancel is tapped.
+  final void Function(List<T>)? onCancel;
+
   /// Toggles search functionality.
   final bool searchable;
 
@@ -85,6 +88,7 @@ class MultiSelectBottomSheet<T> extends StatefulWidget
     this.title,
     this.onSelectionChanged,
     this.onConfirm,
+    this.onCancel,
     this.listType,
     this.cancelText,
     this.confirmText,
@@ -328,7 +332,11 @@ class _MultiSelectBottomSheetState<T> extends State<MultiSelectBottomSheet<T>> {
                     Expanded(
                       child: TextButton(
                         onPressed: () {
-                          widget.onCancelTap(context, widget.initialValue);
+                          widget.onCancelTap(
+                            context,
+                            widget.initialValue,
+                            widget.onConfirm,
+                          );
                         },
                         child: widget.cancelText ??
                             Text(
@@ -348,7 +356,10 @@ class _MultiSelectBottomSheetState<T> extends State<MultiSelectBottomSheet<T>> {
                       child: TextButton(
                         onPressed: () {
                           widget.onConfirmTap(
-                              context, _selectedValues, widget.onConfirm);
+                            context,
+                            _selectedValues,
+                            widget.onConfirm,
+                          );
                         },
                         child: widget.confirmText ??
                             Text(

lib/dialog/mult_select_dialog.dart

@@ -20,6 +20,9 @@ class MultiSelectDialog<T> extends StatefulWidget with MultiSelectActions<T> {
   /// Fires when confirm is tapped.
   final void Function(List<T>)? onConfirm;
 
+  /// Fires when cancel is tapped.
+  final void Function(List<T>)? onCancel;
+
   /// Toggles search functionality. Default is false.
   final bool searchable;
 
@@ -84,6 +87,7 @@ class MultiSelectDialog<T> extends StatefulWidget with MultiSelectActions<T> {
     this.title,
     this.onSelectionChanged,
     this.onConfirm,
+    this.onCancel,
     this.listType,
     this.searchable = false,
     this.confirmText,
@@ -308,7 +312,7 @@ class _MultiSelectDialogState<T> extends State<MultiSelectDialog<T>> {
                 ),
               ),
           onPressed: () {
-            widget.onCancelTap(context, widget.initialValue);
+            widget.onCancelTap(context, widget.initialValue, widget.onCancel);
           },
         ),
         TextButton(

lib/dialog/multi_select_dialog_field.dart

@@ -39,6 +39,9 @@ class MultiSelectDialogField<V> extends FormField<List<V>> {
   /// Fires when confirm is tapped.
   final void Function(List<V>) onConfirm;
 
+  /// Fires when cancel is tapped.
+  final void Function(List<V>)? onCancel;
+
   /// Toggles search functionality.
   final bool searchable;
 
@@ -106,6 +109,7 @@ class MultiSelectDialogField<V> extends FormField<List<V>> {
   MultiSelectDialogField({
     required this.items,
     required this.onConfirm,
+    this.onCancel,
     this.title,
     this.buttonText,
     this.buttonIcon,
@@ -154,6 +158,7 @@ class MultiSelectDialogField<V> extends FormField<List<V>> {
                 decoration: decoration,
                 listType: listType,
                 onConfirm: onConfirm,
+                onCancel: onCancel,
                 onSelectionChanged: onSelectionChanged,
                 initialValue: initialValue,
                 searchable: searchable,
@@ -192,6 +197,7 @@ class _MultiSelectDialogFieldView<V> extends StatefulWidget {
   final MultiSelectChipDisplay<V>? chipDisplay;
   final List<V>? initialValue;
   final void Function(List<V>)? onConfirm;
+  final void Function(List<V>)? onCancel;
   final bool? searchable;
   final Text? confirmText;
   final Text? cancelText;
@@ -222,6 +228,7 @@ class _MultiSelectDialogFieldView<V> extends StatefulWidget {
     this.decoration,
     this.onSelectionChanged,
     this.onConfirm,
+    this.onCancel,
     this.chipDisplay,
     this.initialValue,
     this.searchable,
@@ -256,6 +263,7 @@ class _MultiSelectDialogFieldView<V> extends StatefulWidget {
         decoration = field.decoration,
         onSelectionChanged = field.onSelectionChanged,
         onConfirm = field.onConfirm,
+        onCancel = field.onCancel,
         chipDisplay = field.chipDisplay,
         initialValue = field.initialValue,
         searchable = field.searchable,
@@ -390,6 +398,13 @@ class __MultiSelectDialogFieldViewState<V>
             _selectedItems = selected;
             if (widget.onConfirm != null) widget.onConfirm!(selected);
           },
+          onCancel: (selected) {
+            if (widget.state != null) {
+              widget.state!.didChange(selected);
+            }
+            _selectedItems = selected;
+            if (widget.onCancel != null) widget.onCancel!(selected);
+          },
         );
       },
     );

lib/util/multi_select_actions.dart

@@ -14,8 +14,16 @@ class MultiSelectActions<T> {
   }
 
   /// Pops the dialog from the navigation stack and returns the initially selected values.
-  void onCancelTap(BuildContext ctx, List<T> initiallySelectedValues) {
+  void onCancelTap(
+    BuildContext ctx,
+    List<T> initiallySelectedValues,
+    Function(List<T>)? onConfirm,
+  ) {
     Navigator.pop(ctx, initiallySelectedValues);
+
+    if (onConfirm != null) {
+      onConfirm(initiallySelectedValues);
+    }
   }
 
   /// Pops the dialog from the navigation stack and returns the selected values.