module wijmo.grid.sheet {
	'use strict';

	/**
	 * Defines the HeaderRow class used to display header information for the bind sheet.
	 */
	export class HeaderRow extends wijmo.grid.Row {
		constructor() {
			super();
			this.isReadOnly = true;
		}
	}

	/**
	 * Defines the RowColDataCollection class used to store the row and column data for FlexSheet control.
	 */
	export class RowColDataCollection extends wijmo.collections.ObservableArray {
		private _szDef = 25;

		/**
		 * Initializes a new instance of a RowColDataCollection class.
		 *
		 * @param defaultSize The default size for the collection.
		 */
		constructor(defaultSize?: number){
			super();
			if(isNumber(defaultSize)){
				this._szDef = defaultSize;
			} 
		}

		/**
		 * Gets or sets the default size of elements in this collection.
		 */
		get defaultSize(): number {
			return this._szDef;
		}
		set defaultSize(value: number) {
			if (this._szDef !== value) {
				this._szDef = asNumber(value, false, true);
			}
		}
	}
}