Added disableAlpha prop to CustomGradientPicker and GradientPicker components

packages/components/CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## Unreleased
 
+### Enhancements
+
+-   `GradientPicker`: Add `enableAlpha` prop ([#66974](https://github.com/WordPress/gutenberg/pull/66974))
+-   `CustomGradientPicker`: Add `enableAlpha` prop ([#66974](https://github.com/WordPress/gutenberg/pull/66974))
+
 ### Deprecations
 
 -   `DimensionControl`: Deprecate 36px default size ([#66705](https://github.com/WordPress/gutenberg/pull/66705)).

packages/components/src/custom-gradient-picker/index.tsx

@@ -140,6 +140,7 @@ const GradientTypePicker = ( {
 export function CustomGradientPicker( {
 	value,
 	onChange,
+	enableAlpha = true,
 	__experimentalIsRenderedInSidebar = false,
 }: CustomGradientPickerProps ) {
 	const { gradientAST, hasGradient } = getGradientAstWithDefault( value );
@@ -167,6 +168,7 @@ export function CustomGradientPicker( {
 				__experimentalIsRenderedInSidebar={
 					__experimentalIsRenderedInSidebar
 				}
+				disableAlpha={ ! enableAlpha }
 				background={ background }
 				hasGradient={ hasGradient }
 				value={ controlPoints }

packages/components/src/custom-gradient-picker/types.ts

@@ -26,6 +26,12 @@ export type CustomGradientPickerProps = {
 	 * the `currentGradient` as an argument.
 	 */
 	onChange: ( currentGradient: string ) => void;
+	/**
+	 * Whether to enable alpha transparency options in the picker.
+	 *
+	 * @default true
+	 */
+	enableAlpha?: boolean;
 	/**
 	 * Whether this is rendered in the sidebar.
 	 *

packages/components/src/gradient-picker/README.md

@@ -100,6 +100,14 @@ gradients from `gradients` will be shown.
  - Required: No
  - Default: `false`
 
+### `enableAlpha`
+
+Whether to enable alpha transparency options in the picker.
+
+ - Type: `boolean`
+ - Required: No
+ - Default: `true`
+
 ### `gradients`
 
 An array of objects as predefined gradients displayed above the gradient

packages/components/src/gradient-picker/index.tsx

@@ -213,6 +213,7 @@ export function GradientPicker( {
 	onChange,
 	value,
 	clearable = true,
+	enableAlpha = true,
 	disableCustomGradients = false,
 	__experimentalIsRenderedInSidebar,
 	headingLevel = 2,
@@ -230,6 +231,7 @@ export function GradientPicker( {
 					__experimentalIsRenderedInSidebar={
 						__experimentalIsRenderedInSidebar
 					}
+					enableAlpha={ enableAlpha }
 					value={ value }
 					onChange={ onChange }
 				/>

packages/components/src/gradient-picker/types.ts

@@ -56,6 +56,12 @@ type GradientPickerBaseProps = {
 	 * @default true
 	 */
 	loop?: boolean;
+	/**
+	 * Whether to enable alpha transparency options in the picker.
+	 *
+	 * @default true
+	 */
+	enableAlpha?: boolean;
 } & (
 	| {
 			// TODO: [#54055] Either this or `aria-labelledby` should be required