import * as React from "react";
import { Workbench } from "../workbench";
/**
 * Props of a module tray component.
 */
export interface IModuleTrayProps {
    allowMultipleSelection?: boolean;
    children?: React.ReactNode;
    onChange?: (id: string, open: boolean) => void;
    openDrawers?: string[];
    style?: React.CSSProperties;
    vertical?: boolean;
    workbench: Workbench;
}
/**
 * State of a module tray component.
 */
export interface IModuleTrayState {
    openDrawers: string[];
    visibleIds: string[];
}
/**
 * A module tray that holds multiple module drawers, each of which can be
 * opened in order to reveal a set of draggable placeholders that can be used
 * to place new components in a workbench.
 */
export declare class ModuleTray extends React.Component<IModuleTrayProps, IModuleTrayState> {
    private _visibleIds;
    private _workbench;
    static getDerivedStateFromProps(props: IModuleTrayProps): {
        openDrawers: string[];
    } | null;
    constructor(props: IModuleTrayProps);
    componentDidMount(): void;
    componentDidUpdate(): void;
    componentWillUnmount(): void;
    render(): React.JSX.Element;
    /**
     * Finds a place for a new item in the workbench if the user decides to
     * click on a module in the tray instead of dragging it to the workbench.
     */
    private _addNewItemToWorkbench;
    /**
     * Commits the list of item IDs visible in the workbench to the state of
     * this component from the corresponding local variable.
     */
    private _commitVisibleIdsToState;
    /**
     * Returns whether the tray is controlled.
     */
    private _isControlled;
    /**
     * Returns whether the module with the given props is not visible in
     * the workbench corresponding to the tray.
     */
    private _isModuleNotVisible;
    /**
     * Sets the Workbench object associated to the module drawer.
     *
     * Also takes care of registering or deregistering all the event handlers
     * that the ModuleTray instance might be interested in.
     */
    private _setWorkbench;
    private _onDrawerOpened;
    private _onDrawerClosed;
    private _onItemCreated;
    private _onItemDestroyed;
    private _onItemDropped;
    /**
     * Updates the list of visible IDs by scanning the workbench.
     *
     * Note that this only updates the _visibleIds private variable but it does
     * not commit it ot the state yet.
     */
    private _updateVisibleIds;
}