Merge pull request #315 from AhmedLSayed9/add_copy_with_method_for_style_data_classes

Add copyWith method for style data classes

Author: AhmedLSayed9

packages/dropdown_button2/lib/src/dropdown_style_data.dart

@@ -56,6 +56,28 @@ class ButtonStyleData {
   ///    match a component's state:
   ///    <https://material.io/design/interaction/states.html#anatomy>.
   final MaterialStateProperty<Color?>? overlayColor;
+
+  /// Create a clone of the current [ButtonStyleData] but with the provided
+  /// parameters overridden.
+  ButtonStyleData copyWith({
+    double? height,
+    double? width,
+    EdgeInsetsGeometry? padding,
+    BoxDecoration? decoration,
+    BoxDecoration? foregroundDecoration,
+    int? elevation,
+    MaterialStateProperty<Color?>? overlayColor,
+  }) {
+    return ButtonStyleData(
+      height: height ?? this.height,
+      width: width ?? this.width,
+      padding: padding ?? this.padding,
+      decoration: decoration ?? this.decoration,
+      foregroundDecoration: foregroundDecoration ?? this.foregroundDecoration,
+      elevation: elevation ?? this.elevation,
+      overlayColor: overlayColor ?? this.overlayColor,
+    );
+  }
 }
 
 /// A class to configure the theme of the button's icon.
@@ -97,6 +119,24 @@ class IconStyleData {
 
   /// Shows different icon when dropdown menu is open
   final Widget? openMenuIcon;
+
+  /// Create a clone of the current [IconStyleData] but with the provided
+  /// parameters overridden.
+  IconStyleData copyWith({
+    Widget? icon,
+    Color? iconDisabledColor,
+    Color? iconEnabledColor,
+    double? iconSize,
+    Widget? openMenuIcon,
+  }) {
+    return IconStyleData(
+      icon: icon ?? this.icon,
+      iconDisabledColor: iconDisabledColor ?? this.iconDisabledColor,
+      iconEnabledColor: iconEnabledColor ?? this.iconEnabledColor,
+      iconSize: iconSize ?? this.iconSize,
+      openMenuIcon: openMenuIcon ?? this.openMenuIcon,
+    );
+  }
 }
 
 /// A class to configure the theme of the dropdown menu.
@@ -205,6 +245,44 @@ class DropdownStyleData {
   /// },
   /// ```
   final DropdownBuilder? dropdownBuilder;
+
+  /// Create a clone of the current [DropdownStyleData] but with the provided
+  /// parameters overridden.
+  DropdownStyleData copyWith({
+    double? maxHeight,
+    double? width,
+    EdgeInsetsGeometry? padding,
+    EdgeInsetsGeometry? scrollPadding,
+    BoxDecoration? decoration,
+    int? elevation,
+    DropdownDirection? direction,
+    Offset? offset,
+    bool? isOverButton,
+    bool? useSafeArea,
+    bool? isFullScreen,
+    bool? useRootNavigator,
+    ScrollbarThemeData? scrollbarTheme,
+    Interval? openInterval,
+    DropdownBuilder? dropdownBuilder,
+  }) {
+    return DropdownStyleData(
+      maxHeight: maxHeight ?? this.maxHeight,
+      width: width ?? this.width,
+      padding: padding ?? this.padding,
+      scrollPadding: scrollPadding ?? this.scrollPadding,
+      decoration: decoration ?? this.decoration,
+      elevation: elevation ?? this.elevation,
+      direction: direction ?? this.direction,
+      offset: offset ?? this.offset,
+      isOverButton: isOverButton ?? this.isOverButton,
+      useSafeArea: useSafeArea ?? this.useSafeArea,
+      isFullScreen: isFullScreen ?? this.isFullScreen,
+      useRootNavigator: useRootNavigator ?? this.useRootNavigator,
+      scrollbarTheme: scrollbarTheme ?? this.scrollbarTheme,
+      openInterval: openInterval ?? this.openInterval,
+      dropdownBuilder: dropdownBuilder ?? this.dropdownBuilder,
+    );
+  }
 }
 
 /// A class to configure the theme of the dropdown menu items.
@@ -267,6 +345,23 @@ class MenuItemStyleData {
   /// },
   /// ```
   final SelectedMenuItemBuilder? selectedMenuItemBuilder;
+
+  /// Create a clone of the current [MenuItemStyleData] but with the provided
+  /// parameters overridden.
+  MenuItemStyleData copyWith({
+    EdgeInsetsGeometry? padding,
+    BorderRadius? borderRadius,
+    MaterialStateProperty<Color?>? overlayColor,
+    SelectedMenuItemBuilder? selectedMenuItemBuilder,
+  }) {
+    return MenuItemStyleData(
+      padding: padding ?? this.padding,
+      borderRadius: borderRadius ?? this.borderRadius,
+      overlayColor: overlayColor ?? this.overlayColor,
+      selectedMenuItemBuilder:
+          selectedMenuItemBuilder ?? this.selectedMenuItemBuilder,
+    );
+  }
 }
 
 /// A class to configure searchable dropdowns.
@@ -306,4 +401,23 @@ class DropdownSearchData<T> {
   ///   item.value.toString().toLowerCase().contains(searchValue.toLowerCase());
   /// ```
   final SearchMatchFn<T>? searchMatchFn;
+
+  /// Create a clone of the current [DropdownSearchData] but with the provided
+  /// parameters overridden.
+  DropdownSearchData<T> copyWith({
+    TextEditingController? searchController,
+    Widget? searchBarWidget,
+    double? searchBarWidgetHeight,
+    Widget? noResultsWidget,
+    SearchMatchFn<T>? searchMatchFn,
+  }) {
+    return DropdownSearchData<T>(
+      searchController: searchController ?? this.searchController,
+      searchBarWidget: searchBarWidget ?? this.searchBarWidget,
+      searchBarWidgetHeight:
+          searchBarWidgetHeight ?? this.searchBarWidgetHeight,
+      noResultsWidget: noResultsWidget ?? this.noResultsWidget,
+      searchMatchFn: searchMatchFn ?? this.searchMatchFn,
+    );
+  }
 }