import * as React from 'react';
import classNames from 'classnames'

export class GridSelector extends React.Component<iAXDataGridSelectorProps, iAXDataGridSelectorState> {
  constructor( props: iAXDataGridSelectorProps ) {
    super( props );

  }

  public shouldComponentUpdate( nextProps, nextState ) {
    let sameProps = false;

    if (
      this.props.selecting !== nextProps.selecting ||
      this.props.selectionMinOffset !== nextProps.selectionMinOffset ||
      this.props.selectionMaxOffset !== nextProps.selectionMaxOffset
    ) {
      sameProps = true;
    }

    return sameProps;
  }

  public render() {
    const {
            selecting,
            selectionMinOffset,
            selectionMaxOffset
          } = this.props;

    if ( !selecting ) return null;

    let selectorStyles = {
      left: selectionMinOffset.x,
      top: selectionMinOffset.y,
      width: selectionMaxOffset.x - selectionMinOffset.x,
      height: selectionMaxOffset.y - selectionMinOffset.y
    };

    return (
      <div
        className={classNames( '' )}
        style={selectorStyles}
      />
    )
  }
}