import { EventEmitter, OnDestroy, TemplateRef } from '@angular/core';
import { OverlayHostService } from '../overlay-host/overlay-host.service';
import { DropdownContent } from './dropdown-content.component';
import { DropdownTriggerDirective } from './dropdown-trigger.directive';
import { DropdownAlignment, DropdownWidth } from './dropdown.model';
import * as i0 from "@angular/core";
/**
 * A Dropdown component. Depends on the [`<gtx-overlay-host>`](#/overlay-host) being present in the app.
 *
 * The component expects two child elements:
 *
 * * `<gtx-dropdown-trigger>` - this element is the button/label which the user will click to open the dropdown.
 * * `<gtx-dropdown-content>` - contains the contents of the dropdown. If it contains a `<ul>`, specific styles will be applied
 *
 * The `<gtx-dropdown-content>` element may contain arbitrary content, but list items should be wrapped in `<gtx-dropdown-item>`.
 * This will allow keyboard support for list navigation.
 *
 *
 * ```html
 * <gtx-dropdown-list>
 *     <gtx-dropdown-trigger>
 *         <a>Show List</a>
 *     </gtx-dropdown-trigger>
 *     <gtx-dropdown-content>
 *          <gtx-dropdown-item>First</gtx-dropdown-item>
 *          <gtx-dropdown-item>Second</gtx-dropdown-item>
 *          <gtx-dropdown-item>Third</gtx-dropdown-item>
 *     </gtx-dropdown-content>
 * </gtx-dropdown-list>
 * ```
 *
 * ## Programmatic Use
 * When used programmatically (e.g. by getting a reference to the component via `@ContentChild(DropdownList)`, the
 * following extended API is available:
 *
 * - `dropdownList.isOpen: boolean`
 * - `dropdownList.openDropdown(): void`
 * - `dropdownList.closeDropdown(): void`
 * - `dropdownList.resize(): void`
 */
export declare class DropdownList implements OnDestroy {
    options: {
        alignment: DropdownAlignment;
        width: DropdownWidth;
        belowTrigger: boolean;
        sticky: boolean;
        closeOnEscape: boolean;
    };
    contentsTemplate: TemplateRef<any>;
    trigger: DropdownTriggerDirective;
    content: DropdownContent;
    /**
     * Fired whenever the dropdown contents are opened.
     */
    open: EventEmitter<void>;
    /**
     * Fired whenever the dropdown contents are closed.
     */
    close: EventEmitter<void>;
    private _disabled;
    private overlayHostView;
    private scrollMaskFactory;
    private scrollMaskRef;
    private contentComponentFactory;
    private contentComponentRef;
    /**
     * Set the alignment of the dropdown, either 'left' or 'right'. *Default: 'left'*.
     */
    get align(): DropdownAlignment;
    set align(val: DropdownAlignment);
    /**
     * Set the width of the dropdown. Can be either `contents`, `trigger`, `expand` or a numeric value. 'Contents' will
     * set a width sufficient to accommodate the widest list item. 'Trigger' sets the width to equal the width
     * of the trigger element. 'Expand' is equivalent to the maximum of 'trigger' and 'contents'.
     * A numeric value sets the width the a specific number of pixels. *Default: 'contents'*.
     */
    get width(): DropdownWidth;
    set width(val: DropdownWidth);
    /**
     * If true, the dropdown will be positioned below the bottom of the trigger element. *Default: false*.
     */
    get belowTrigger(): boolean;
    set belowTrigger(val: boolean);
    /**
     * If true, the dropdown will not close when clicked, but may only be closed by clicking outside the dropdown or
     * pressing escape. *Default: false*
     */
    get sticky(): boolean;
    set sticky(val: boolean);
    /**
     * If true, the dropdown will close when the escape key is pressed. *Default: true*
     */
    get closeOnEscape(): boolean;
    set closeOnEscape(val: boolean);
    /**
     * If true, the dropdown will not open when the trigger is clicked.
     */
    get disabled(): boolean;
    set disabled(val: boolean);
    get isOpen(): boolean;
    constructor(overlayHostService: OverlayHostService);
    /**
     * Remove the content wrapper from the body.
     */
    ngOnDestroy(): void;
    /**
     * Prevent the user from causing a scroll via the keyboard.
     */
    keyHandler(e: KeyboardEvent): void;
    /**
     * Open the dropdown contents in the correct position.
     */
    openDropdown(): void;
    resize(): void;
    onTriggerClick(): void;
    /**
     * Close the dropdown.
     */
    closeDropdown(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownList, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DropdownList, "gtx-dropdown-list", never, { "align": "align"; "width": "width"; "belowTrigger": "belowTrigger"; "sticky": "sticky"; "closeOnEscape": "closeOnEscape"; "disabled": "disabled"; }, { "open": "open"; "close": "close"; }, ["trigger", "content"], ["gtx-dropdown-trigger", "gtx-dropdown-content"]>;
}