import * as i0 from '@angular/core';
import { AfterContentInit, EventEmitter, QueryList } from '@angular/core';
import { EuiButtonComponent } from '@eui/components/eui-button';

/**
 * @description
 * `eui-button-group` component for organizing multiple buttons with optional checkbox or radio button selection behavior.
 * Provides visual grouping and automatic state management for single or multiple selection modes.
 * Supports three modes: standard (no selection), checkbox (multiple selection), and radio (single selection).
 * Automatically manages checked state across buttons and emits events on button interactions.
 * Content is projected via ng-content expecting `eui-button` children.
 *
 * @usageNotes
 * #### Standard button group (no selection behavior)
 * ```html
 * <eui-button-group>
 *   <button euiButton id="btn1">Action 1</button>
 *   <button euiButton id="btn2">Action 2</button>
 *   <button euiButton id="btn3">Action 3</button>
 * </eui-button-group>
 * ```
 *
 * #### Radio button group (single selection)
 * ```html
 * <eui-button-group [isRadioButtons]="true" (buttonClick)="onSelection($event)">
 *   <button euiButton id="left" [isChecked]="true">Left</button>
 *   <button euiButton id="center">Center</button>
 *   <button euiButton id="right">Right</button>
 * </eui-button-group>
 * ```
 *
 * #### Checkbox button group (multiple selection)
 * ```html
 * <eui-button-group [isCheckboxButtons]="true">
 *   <button euiButton id="bold">Bold</button>
 *   <button euiButton id="italic">Italic</button>
 *   <button euiButton id="underline">Underline</button>
 * </eui-button-group>
 * ```
 *
 * ```ts
 * onSelection(button: EuiButtonComponent): void {
 *   console.log('Selected button:', button.id, 'Checked:', button.isChecked);
 * }
 * ```
 *
 * ### Accessibility
 * - Buttons maintain native keyboard accessibility (Enter/Space)
 * - Visual grouping indicates related actions to all users
 * - Checked state is visually indicated and announced to screen readers
 * - Radio mode ensures only one selection, following standard radio button patterns
 * - Each button should have unique id for proper state management
 * - Consider adding aria-label to group for screen reader context
 *
 * ### Notes
 * - Must contain button[euiButton] children for proper functionality
 * - Three modes: standard (default), radio (isRadioButtons), checkbox (isCheckboxButtons)
 * - Standard mode: buttons act as regular action buttons without selection state
 * - Radio mode: only one button can be checked at a time, selecting one unchecks others
 * - Checkbox mode: multiple buttons can be checked independently
 * - Each button must have unique id attribute for state management
 * - isChecked property on buttons controls initial checked state
 * - buttonClick event emits after state is updated
 * - Buttons are visually grouped with connected borders
 * - Cannot enable both isRadioButtons and isCheckboxButtons simultaneously
 * - Use radio mode for mutually exclusive options (alignment, view mode)
 * - Use checkbox mode for independent toggles (text formatting, filters)
 */
declare class EuiButtonGroupComponent implements AfterContentInit {
    /** CSS classes applied to the host element */
    get cssClasses(): string;
    /**
     * Enables checkbox behavior allowing multiple buttons to be selected simultaneously.
     * When true, buttons can be independently toggled on/off.
     * @default false
     */
    isCheckboxButtons: boolean;
    /**
     * Enables radio button behavior allowing only one button to be selected at a time.
     * When true, selecting a button automatically deselects others in the group.
     * @default false
     */
    isRadioButtons: boolean;
    /**
     * Emitted when any button in the group is clicked.
     * Payload: EuiButtonComponent - the clicked button instance
     * Triggered after button state is updated based on group configuration.
     */
    buttonClick: EventEmitter<EuiButtonComponent>;
    buttons: QueryList<EuiButtonComponent>;
    ngAfterContentInit(): void;
    /**
     * Handles button click events based on group configuration
     * - For checkbox buttons: Toggles the clicked button's checked state
     * - For radio buttons: Sets the clicked button as checked and unchecks others
     * - Emits the buttonClick event with the clicked button instance
     *
     * @param button - The EuiButtonComponent that was clicked
     * @internal
     */
    private handleInnerButtonClick;
    static ɵfac: i0.ɵɵFactoryDeclaration<EuiButtonGroupComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<EuiButtonGroupComponent, "eui-button-group", never, { "isCheckboxButtons": { "alias": "isCheckboxButtons"; "required": false; }; "isRadioButtons": { "alias": "isRadioButtons"; "required": false; }; }, { "buttonClick": "buttonClick"; }, ["buttons"], ["*"], true, never>;
    static ngAcceptInputType_isCheckboxButtons: unknown;
    static ngAcceptInputType_isRadioButtons: unknown;
}

declare const EUI_BUTTON_GROUP: readonly [typeof EuiButtonGroupComponent];

export { EUI_BUTTON_GROUP, EuiButtonGroupComponent };
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