import { QueryList } from '@angular/core';
import { TsOptgroupComponent } from './optgroup.component';
import { TsOptionComponent } from './option.component';
/**
 * Determine if all options are selected
 *
 * @param options - The list of options
 * @returns If all are selected
 */
export declare function allOptionsAreSelected(options: QueryList<TsOptionComponent>): boolean;
/**
 * Counts the amount of option group labels that precede the specified option
 *
 * @param optionIndex - Index of the option at which to start counting
 * @param options - Flat list of all of the options
 * @param optionGroups - Flat list of all of the option groups
 * @returns The number of labels
 */
export declare function countGroupLabelsBeforeOption(optionIndex: number, options: QueryList<TsOptionComponent>, optionGroups: QueryList<TsOptgroupComponent>): number;
/**
 * Determine the position to scroll a panel in order for an option to be in view
 *
 * @param optionIndex - Index of the option to be scrolled into view
 * @param optionHeight - Height of the options
 * @param currentScrollPosition - Current scroll position of the panel
 * @param panelHeight - Height of the panel
 * @returns The scroll position
 */
export declare function getOptionScrollPosition(optionIndex: number, optionHeight: number, currentScrollPosition: number, panelHeight: number): number;
/**
 * Determine if one or more options are selected but not all
 *
 * @param options - The list of options
 * @returns If some are selected
 */
export declare function someOptionsAreSelected(options: QueryList<TsOptionComponent>): boolean;
/**
 * Toggle the selected state of all options
 *
 * If at least one option is selected this will deselect all selected options.
 * If no options are selected this will select all options.
 *
 * @param options - The list of options
 */
export declare function toggleAllOptions(options: QueryList<TsOptionComponent>): void;