import { AfterContentInit, ElementRef, EventEmitter, OnDestroy, QueryList, Renderer } from '@angular/core';
import { MdOption } from './option';
import { ListKeyManager } from '../core/a11y/list-key-manager';
import { Dir } from '../core/rtl/dir';
import { ControlValueAccessor, NgControl } from '@angular/forms';
import { ConnectedOverlayDirective } from '../core/overlay/overlay-directives';
import { ViewportRuler } from '../core/overlay/position/viewport-ruler';
/**
 * The following style constants are necessary to save here in order
 * to properly calculate the alignment of the selected option over
 * the trigger element.
 */
/** The fixed height of every option element. */
export declare const SELECT_OPTION_HEIGHT: number;
/** The max height of the select's overlay panel */
export declare const SELECT_PANEL_MAX_HEIGHT: number;
/** The max number of options visible at once in the select panel. */
export declare const SELECT_MAX_OPTIONS_DISPLAYED: number;
/** The fixed height of the select's trigger element. */
export declare const SELECT_TRIGGER_HEIGHT: number;
/**
 * Must adjust for the difference in height between the option and the trigger,
 * so the text will align on the y axis.
 * (SELECT_OPTION_HEIGHT (48) - SELECT_TRIGGER_HEIGHT (30)) / 2 = 9
 */
export declare const SELECT_OPTION_HEIGHT_ADJUSTMENT: number;
/** The panel's padding on the x-axis */
export declare const SELECT_PANEL_PADDING_X: number;
/**
 * The panel's padding on the y-axis. This padding indicates there are more
 * options available if you scroll.
 */
export declare const SELECT_PANEL_PADDING_Y: number;
/**
 * The select panel will only "fit" inside the viewport if it is positioned at
 * this value or more away from the viewport boundary.
 */
export declare const SELECT_PANEL_VIEWPORT_PADDING: number;
export declare class MdSelect implements AfterContentInit, ControlValueAccessor, OnDestroy {
    private _element;
    private _renderer;
    private _viewportRuler;
    private _dir;
    _control: NgControl;
    /** Whether or not the overlay panel is open. */
    private _panelOpen;
    /** The currently selected option. */
    private _selected;
    /** Subscriptions to option events. */
    private _subscriptions;
    /** Subscription to changes in the option list. */
    private _changeSubscription;
    /** Subscription to tab events while overlay is focused. */
    private _tabSubscription;
    /** Whether filling out the select is required in the form.  */
    private _required;
    /** Whether the select is disabled.  */
    private _disabled;
    /** The scroll position of the overlay panel, calculated to center the selected option. */
    private _scrollTop;
    /** The placeholder displayed in the trigger of the select. */
    private _placeholder;
    /** The animation state of the placeholder. */
    _placeholderState: string;
    /**
     * The width of the trigger. Must be saved to set the min width of the overlay panel
     * and the width of the selected value.
     */
    _triggerWidth: number;
    /**
     * The width of the selected option's value. Must be set programmatically
     * to ensure its overflow is clipped, as it's absolutely positioned.
     */
    _selectedValueWidth: number;
    /** Manages keyboard events for options in the panel. */
    _keyManager: ListKeyManager;
    /** View -> model callback called when value changes */
    _onChange: (value: any) => void;
    /** View -> model callback called when select has been touched */
    _onTouched: () => void;
    /** The IDs of child options to be passed to the aria-owns attribute. */
    _optionIds: string;
    /** The value of the select panel's transform-origin property. */
    _transformOrigin: string;
    /**
     * The x-offset of the overlay panel in relation to the trigger's top start corner.
     * This must be adjusted to align the selected option text over the trigger text when
     * the panel opens. Will change based on LTR or RTL text direction.
     */
    _offsetX: number;
    /**
     * The y-offset of the overlay panel in relation to the trigger's top start corner.
     * This must be adjusted to align the selected option text over the trigger text.
     * when the panel opens. Will change based on the y-position of the selected option.
     */
    _offsetY: number;
    /**
     * This position config ensures that the top "start" corner of the overlay
     * is aligned with with the top "start" of the origin by default (overlapping
     * the trigger completely). If the panel cannot fit below the trigger, it
     * will fall back to a position above the trigger.
     */
    _positions: {
        originX: string;
        originY: string;
        overlayX: string;
        overlayY: string;
    }[];
    /** Trigger that opens the select. */
    trigger: ElementRef;
    /** Overlay pane containing the options. */
    overlayDir: ConnectedOverlayDirective;
    /** All of the defined select options. */
    options: QueryList<MdOption>;
    /** Placeholder to be shown if no value has been selected. */
    placeholder: string;
    /** Whether the component is disabled. */
    disabled: any;
    /** Whether the component is required. */
    required: any;
    /** Event emitted when the select has been opened. */
    onOpen: EventEmitter<{}>;
    /** Event emitted when the select has been closed. */
    onClose: EventEmitter<{}>;
    constructor(_element: ElementRef, _renderer: Renderer, _viewportRuler: ViewportRuler, _dir: Dir, _control: NgControl);
    ngAfterContentInit(): void;
    ngOnDestroy(): void;
    /** Toggles the overlay panel open or closed. */
    toggle(): void;
    /** Opens the overlay panel. */
    open(): void;
    /** Closes the overlay panel and focuses the host element. */
    close(): void;
    /**
     * Sets the select's value. Part of the ControlValueAccessor interface
     * required to integrate with Angular's core forms API.
     *
     * @param value New value to be written to the model.
     */
    writeValue(value: any): void;
    /**
     * Saves a callback function to be invoked when the select's value
     * changes from user input. Part of the ControlValueAccessor interface
     * required to integrate with Angular's core forms API.
     *
     * @param fn Callback to be triggered when the value changes.
     */
    registerOnChange(fn: (value: any) => void): void;
    /**
     * Saves a callback function to be invoked when the select is blurred
     * by the user. Part of the ControlValueAccessor interface required
     * to integrate with Angular's core forms API.
     *
     * @param fn Callback to be triggered when the component has been touched.
     */
    registerOnTouched(fn: () => {}): void;
    /**
     * Disables the select. Part of the ControlValueAccessor interface required
     * to integrate with Angular's core forms API.
     *
     * @param isDisabled Sets whether the component is disabled.
     */
    setDisabledState(isDisabled: boolean): void;
    /** Whether or not the overlay panel is open. */
    readonly panelOpen: boolean;
    /** The currently selected option. */
    readonly selected: MdOption;
    _isRtl(): boolean;
    /** The width of the trigger element. This is necessary to match
     * the overlay width to the trigger width.
     */
    _getWidth(): number;
    /** Ensures the panel opens if activated by the keyboard. */
    _handleKeydown(event: KeyboardEvent): void;
    /**
     * When the panel is finished animating, emits an event and focuses
     * an option if the panel is open.
     */
    _onPanelDone(): void;
    /**
     * Calls the touched callback only if the panel is closed. Otherwise, the trigger will
     * "blur" to the panel when it opens, causing a false positive.
     */
    _onBlur(): void;
    /** Returns the correct tabindex for the select depending on disabled state. */
    _getTabIndex(): string;
    /**
     * Sets the scroll position of the scroll container. This must be called after
     * the overlay pane is attached or the scroll container element will not yet be
     * present in the DOM.
     */
    _setScrollTop(): void;
    /**
     * Sets the selected option based on a value. If no option can be
     * found with the designated value, the select trigger is cleared.
     */
    private _setSelectionByValue(value);
    /** Clears the select trigger and deselects every option in the list. */
    private _clearSelection();
    private _getTriggerRect();
    /** Sets up a key manager to listen to keyboard events on the overlay panel. */
    private _initKeyManager();
    /** Drops current option subscriptions and IDs and resets from scratch. */
    private _resetOptions();
    /** Listens to selection events on each option. */
    private _listenToOptions();
    /** Unsubscribes from all option subscriptions. */
    private _dropSubscriptions();
    /** Records option IDs to pass to the aria-owns property. */
    private _setOptionIds();
    /** When a new option is selected, deselects the others and closes the panel. */
    private _onSelect(option);
    /** Deselect each option that doesn't match the current selection. */
    private _updateOptions();
    /**
     * Must set the width of the selected option's value programmatically
     * because it is absolutely positioned and otherwise will not clip
     * overflow. The selection arrow is 9px wide, add 4px of padding = 13
     */
    private _setValueWidth();
    /** Focuses the selected item. If no option is selected, it will focus
     * the first item instead.
     */
    private _focusCorrectOption();
    /** Focuses the host element when the panel closes. */
    private _focusHost();
    /** Gets the index of the provided option in the option list. */
    private _getOptionIndex(option);
    /** Calculates the scroll position and x- and y-offsets of the overlay panel. */
    private _calculateOverlayPosition();
    /**
     * Calculates the scroll position of the select's overlay panel.
     *
     * Attempts to center the selected option in the panel. If the option is
     * too high or too low in the panel to be scrolled to the center, it clamps the
     * scroll position to the min or max scroll positions respectively.
     */
    _calculateOverlayScroll(selectedIndex: number, scrollBuffer: number, maxScroll: number): number;
    /**
     * Calculates the y-offset of the select's overlay panel in relation to the
     * top start corner of the trigger. It has to be adjusted in order for the
     * selected option to be aligned over the trigger when the panel opens.
     */
    private _calculateOverlayOffset(selectedIndex, scrollBuffer, maxScroll);
    /**
     * Checks that the attempted overlay position will fit within the viewport.
     * If it will not fit, tries to adjust the scroll position and the associated
     * y-offset so the panel can open fully on-screen. If it still won't fit,
     * sets the offset back to 0 to allow the fallback position to take over.
     */
    private _checkOverlayWithinViewport(maxScroll);
    /** Adjusts the overlay panel up to fit in the viewport. */
    private _adjustPanelUp(panelHeightBottom, bottomSpaceAvailable);
    /** Adjusts the overlay panel down to fit in the viewport. */
    private _adjustPanelDown(panelHeightTop, topSpaceAvailable, maxScroll);
    /** Sets the transform origin point based on the selected option. */
    private _getOriginBasedOnOption();
}