(function( $ ){

/**
 * A display rectanlge is very similar to the OpenSeadragon.Rect but adds two
 * fields, 'minLevel' and 'maxLevel' which denote the supported zoom levels
 * for this rectangle.
 * @class
 * @extends OpenSeadragon.Rect
 * @param {Number} x The vector component 'x'.
 * @param {Number} y The vector component 'y'.
 * @param {Number} width The vector component 'height'.
 * @param {Number} height The vector component 'width'.
 * @param {Number} minLevel The lowest zoom level supported.
 * @param {Number} maxLevel The highest zoom level supported.
 * @property {Number} minLevel The lowest zoom level supported.
 * @property {Number} maxLevel The highest zoom level supported.
 */
$.DisplayRect = function( x, y, width, height, minLevel, maxLevel ) {
    $.Rect.apply( this, [ x, y, width, height ] );

    this.minLevel = minLevel;
    this.maxLevel = maxLevel;
}

$.extend( $.DisplayRect.prototype, $.Rect.prototype );

}( OpenSeadragon ));