import { FocusableOption, FocusMonitor, FocusOrigin } from '@angular/cdk/a11y';
import { ChangeDetectorRef, ElementRef, OnDestroy } from '@angular/core';
import { SimExpansionPanelComponent } from './expansion-panel.component';
export declare class SimExpansionPanelHeaderComponent implements OnDestroy, FocusableOption {
    panel: SimExpansionPanelComponent;
    private _elementRef;
    private _focusMonitor;
    private _changeDetectorRef;
    /** 面板展开时标题的高度 */
    expandedHeight: string;
    /** 面板折叠时标题的高度 */
    collapsedHeight: string;
    /** 是否应禁用面板标题中的Angular动画 */
    _animationsDisabled: boolean;
    get disabled(): boolean;
    get expanded(): boolean;
    get togglePosition(): boolean;
    get _expansionHeight(): {
        value: import("./expansion.typings").SimExpansionPanelState;
        params: {
            collapsedHeight: string;
            expandedHeight: string;
        };
    };
    /** 获取是否应显示展开指示符 */
    get _showToggle(): boolean;
    private _parentChangeSubscription;
    constructor(panel: SimExpansionPanelComponent, _elementRef: ElementRef, _focusMonitor: FocusMonitor, _changeDetectorRef: ChangeDetectorRef);
    ngOnDestroy(): void;
    clickToggle(): void;
    onkeydown(event: KeyboardEvent): void;
    animationStarted(): void;
    /**
     * 聚焦面板标题。 Implemented as a part of `FocusableOption`
     */
    focus(origin?: FocusOrigin, options?: FocusOptions): void;
}