import * as React from 'react';
interface IMDPickerColumnProps {
    itemHeight?: number;
    onPickerSelected: (selectIndex: number, selectContext: string, columnIndex: number) => void;
    column: [];
    width: number;
    offsetY: number;
    columnIndex: number;
    selectIndex: number;
    invalidItemIndexs: number[];
}
interface IMDPickerColumnState {
    selectIndex: number;
}
export default class PickerColumn extends React.Component<IMDPickerColumnProps, IMDPickerColumnState> {
    static defaultProps: {
        itemHeight: number;
        onPickerSelected: null;
        invalidItemIndexs: never[];
    };
    constructor(props: IMDPickerColumnProps);
    private selectIndex;
    private realIndex;
    private oldIndex;
    private isDragAnima;
    private scroller;
    private isNewProps;
    private columnValue;
    componentWillReceiveProps(nextProps: IMDPickerColumnProps): void;
    componentWillMount(): void;
    componentDidMount(): void;
    componentDidUpdate(): void;
    render(): JSX.Element;
    private renderList;
    private renderItem;
    private onScrollBeginDrag;
    private onScrollEndDrag;
    private onMomentumScrollBegin;
    private onMomentumScrollEnd;
    private scrollToPisiton;
    private scrollTopIndex;
    private caculateScrollIndex;
    private updateSelectIndex;
    private checkValidIndex;
    private getActiveValue;
    private initColumnValue;
}
export {};