Add support for shadow and tint colors to the dialog

CHANGELOG.md

@@ -14,6 +14,7 @@ Requires min Flutter 3.16.0 and Dart 3.0.0.
 - Added `dialogActionOnlyOkButton` to `ColorPickerActionButtons`. Defaults to false. If set to true and `dialogActionButtons` is true, only the OK button will be shown.
 - Added support for a second custom color palette to the picker. In addition to `ColorPickerType.custom` there is now also a `ColorPickerType.customSecondary` picker selector. It gets its values from `ColorPicker.customSecondaryColorSwatchesAndNames`. 
 - Added support for transparent colors for both custom color palette pickers. They can now have opacity in the picker in their custom color values. This also works if the opacity and slider in `ColorPicker.enableOpacity` is not enabled. Nothing new is needed to use this feature. It works automatically when custom color palettes are used that have partially transparent colors in them. 
+- Added `shadowColor` and `surfaceTintColor` to the dialog properties to enable control of the shadow color and surface tint color of the color picker dialog.
 - The color utilities `ColorTools.createPrimarySwatch` and `ColorTools.createAccentSwatch` now create color swatches with alpha channel value kept at its input values for all created swatch indexes. Previously they set alpha to `#FF`, even if the value might have been something else. Creating palettes with very low alpha in the source color will not produce pretty palettes, but it is now possible to create them.
 - The Color picker received two new layout properties. Previously all vertical spacings between the column elements in the picker were controlled by the `ColorPicker` property `columnSpacing`. For two key elements, you can now override this spacing. 
  - Use `toolbarSpacing` to adjust the vertical spacing below the top toolbar header and its action buttons. The purpose is to enable using zero space or close to it, so the top toolbar and action buttons can be closer to the picker selection control than the rest of the spacing in the picker uses.

example/pubspec.lock

@@ -119,7 +119,7 @@ packages:
  path: ".."
  relative: true
  source: path
- version: "3.4.0"
+ version: "3.3.1"
  flex_seed_scheme:
  dependency: transitive
  description:

lib/src/color_picker.dart

@@ -840,6 +840,14 @@ class ColorPicker extends StatefulWidget {
  /// Defaults to 0.
  final double? elevation,
 
+ /// The color used to paint a drop shadow under the dialog's Material,
+ /// which reflects the dialog's elevation.
+ final Color? shadowColor,
+
+ /// The color used as a surface tint overlay on the dialog's background
+ /// color, which reflects the dialog's elevation.
+ final Color? surfaceTintColor,
+
  /// The semantic label of the dialog used by accessibility frameworks to
  /// announce screen transitions when the dialog is opened and closed.
  ///
@@ -1193,6 +1201,8 @@ class ColorPicker extends StatefulWidget {
  buttonPadding: buttonPadding,
  backgroundColor: backgroundColor,
  elevation: elevation,
+ shadowColor: shadowColor,
+ surfaceTintColor: surfaceTintColor,
  semanticLabel: semanticLabel,
  insetPadding: insetPadding,
  clipBehavior: clipBehavior,

lib/src/show_color_picker_dialog.dart

@@ -563,6 +563,14 @@ Future<Color> showColorPickerDialog(
  /// Defaults to 0.
  final double? dialogElevation,
 
+ /// The color used to paint a drop shadow under the dialog's Material,
+ /// which reflects the dialog's elevation.
+ final Color? shadowColor,
+
+ /// The color used as a surface tint overlay on the dialog's background
+ /// color, which reflects the dialog's elevation.
+ final Color? surfaceTintColor,
+
  /// The semantic label of the dialog used by accessibility frameworks to
  /// announce screen transitions when the dialog is opened and closed.
  ///
@@ -741,6 +749,8 @@ Future<Color> showColorPickerDialog(
  buttonPadding: buttonPadding,
  backgroundColor: backgroundColor,
  elevation: dialogElevation,
+ shadowColor: shadowColor,
+ surfaceTintColor: surfaceTintColor,
  semanticLabel: semanticLabel,
  insetPadding: insetPadding,
  clipBehavior: clipBehavior,