import { FocusMonitor } from '@angular/cdk/a11y';
import { ChangeDetectorRef, ElementRef, OnDestroy, Renderer2 } from '@angular/core';
import { MatExpansionPanel } from './expansion-panel';
/**
 * <mat-expansion-panel-header> component.
 *
 * This component corresponds to the header element of an <mat-expansion-panel>.
 *
 * Please refer to README.md for examples on how to use it.
 */
export declare class MatExpansionPanelHeader implements OnDestroy {
    panel: MatExpansionPanel;
    private _element;
    private _focusMonitor;
    private _changeDetectorRef;
    private _parentChangeSubscription;
    constructor(renderer: Renderer2, panel: MatExpansionPanel, _element: ElementRef, _focusMonitor: FocusMonitor, _changeDetectorRef: ChangeDetectorRef);
    /** Height of the header while the panel is expanded. */
    expandedHeight: string;
    /** Height of the header while the panel is collapsed. */
    collapsedHeight: string;
    /** Toggles the expanded state of the panel. */
    _toggle(): void;
    /** Gets whether the panel is expanded. */
    _isExpanded(): boolean;
    /** Gets the expanded state string of the panel. */
    _getExpandedState(): string;
    /** Gets the panel id. */
    _getPanelId(): string;
    /** Gets whether the expand indicator should be shown. */
    _showToggle(): boolean;
    /** Handle keyup event calling to toggle() if appropriate. */
    _keyup(event: KeyboardEvent): void;
    ngOnDestroy(): void;
}
/**
 * <mat-panel-description> directive.
 *
 * This direction is to be used inside of the MatExpansionPanelHeader component.
 */
export declare class MatExpansionPanelDescription {
}
/**
 * <mat-panel-title> directive.
 *
 * This direction is to be used inside of the MatExpansionPanelHeader component.
 */
export declare class MatExpansionPanelTitle {
}