/** Core */
import { CoreComponent } from "cmf.core/src/core";
/** Nested components */
import { DropdownElement as BaseDropdownElement } from "cmf.core.controls/src/components/dropdown/dropdown";
/** Angular2 */
import * as ng from "@angular/core";
export interface DropdownElement {
    index: number;
    value: string;
    selected?: boolean;
}
/**
 * SelectDropdown Business component.
 *
 * Used to display a simple dropdown with some options (text only supported) to select.
 * It accepts multi-selection mode and a custom layout.
 * Title can be always the same (for options dropdown) or change to the active/selected option when in single mode.
 *
 * It uses the Dropdown component to display the dropdown.
 *
 * ## Inputs
 * * mainTitle: the title of the dropdown to show
 * * showItemInTitle: when activated, if the dropdown is in single selection mode, it will show the selected item in the title;
 * otherwise, show the title
 * * items: array of strings (text) of options to show
 * * selectedItems: selected items by default. If they change during execution, the existing selection will use the new value
 * * multiSelection: enable or disable multi selection mode. When multi selection mode is ON, it is possible to have 0 items selected;
 * otherwise, it must exist always 1 option selected
 * * joinTitleAndValue: if true, join mainTitle with the current selected value on title when multiSelection is false
 *
 * ## Outputs
 * * selectedItemsChange: dispatch an event with the selected options (Array<DropdownElement>)
 *
 * ## Example
 *
 * Assume this HTML Template
 *
 * ```html
 * <cmf-core-business-controls-selectDropdown
 *   mainTitle="My Dropdown Title"
 *   [items]="string[]"
 *   [showItemInTitle]="false"
 *   [selectedItems]="string[]"
 *   [multiSelection]="false"
 *   [joinTitleAndValue]="false"
 *   (selectedItemsChange)="myCallback($event)">
 * </cmf-core-business-controls-selectDropdown>
 * ```
 *
 * @class SelectDropdown
 */
export declare class SelectDropdown extends CoreComponent implements ng.OnChanges, ng.AfterViewInit {
    /**
     * Title to be rended by this component
     */
    _title: string;
    /**
     * Title to show in the dropdown
     */
    mainTitle: string;
    /**
     * Deprecated title input
     */
    title: string;
    /**
     * Show the selected item in the title when available
     */
    showItemInTitle: boolean;
    /**
     * Items to be rendered by this component
     */
    _items: Array<DropdownElement>;
    /**
     * Items received by component
     */
    items: Array<string>;
    /**
     * Selected items by default
     */
    selectedItems: Array<string>;
    /**
     * Set if this dropdown is multi or single selection.
     * False by default.
     */
    multiSelection: boolean;
    /**
     * The value change event, so the component can inform the upper components that the value has changed
     */
    selectedItemsChange: ng.EventEmitter<Array<DropdownElement>>;
    /**
     * Joins mainTitle and value in component title
     */
    joinTitleAndValue: boolean;
    /**
     * On changes method
     * Update items - rebuild internal index for best display
     * Update selected value
     */
    ngOnChanges(changes: any): void;
    /**
     * After view init method
     * Update the title using the settings for this component
     */
    ngAfterViewInit(): void;
    /**
     * Update the title
     * Why do this instead of a get function for title property?
     * Just because Angular dirty-check-mode would be much less efficient that way,
     * so we can just update this value only and only when needed :)
     * Updates the title to the selected item when in single selection mode.
     */
    private _updateTitle;
    _onItemSelect(selectedItem: BaseDropdownElement<DropdownElement>): void;
}
export declare class SelectDropdownModule {
}