using System;
using System.Data;
using System.Web.UI.WebControls;

using Infragistics.WebUI.UltraWebGrid;

namespace InfragisticsGridControls
{
	public class FixedHierarchical : WebControl
	{
		private DataSet ds;
		private UltraWebGrid _uwg;

		protected override void CreateChildControls()
		{
			base.CreateChildControls();
			_uwg = new UltraWebGrid("attachmentGrid");
			Controls.Add(_uwg);
			_uwg.DisplayLayout.ViewType = ViewType.Hierarchical;

			_uwg.InitializeLayout += new InitializeLayoutEventHandler(InitializeLayout);
			_uwg.DataBinding += new EventHandler(_uwg_DataBinding);
		}

		void InitializeLayout(object sender, LayoutEventArgs e)
		{
			_uwg.DisplayLayout.TableLayout = TableLayout.Fixed;
			// This works, but if the screen region is smaller than the amount, it forces scrolling.
			//_uwg.Bands[0].Columns.FromKey("FUNCTION_CODE").Width = Unit.Pixel(900);

			// This doesn't work if the TableLayout = Fixed.
			//_uwg.Bands[0].Columns.FromKey("FUNCTION_CODE").Width = Unit.Percentage(100);

			_uwg.DisplayLayout.RowHeightDefault = Unit.Pixel(20);
			_uwg.Bands[0].ColHeadersVisible = Infragistics.WebUI.UltraWebGrid.ShowMarginInfo.No;

			UltraGridBand attachBand = new UltraGridBand();
			_uwg.Bands.Add(attachBand);
		}

		void _uwg_DataBinding(object sender, EventArgs e)
		{
			ds = new DataSet();

			DataTable table = new DataTable("FSDOC");
			table.Columns.Add("FUNCTION_CODE", typeof(string));
			table.Constraints.Add("Key", table.Columns["FUNCTION_CODE"], true);
			ds.Tables.Add(table);

			DataTable attachTable = new DataTable("FSITEMATTACH");
			attachTable.Columns.Add("FUNCTION_CODE", typeof(string));
			attachTable.Columns.Add("FILE_NAME", typeof(string));
			attachTable.Columns.Add("DESCRIPTION", typeof(string));
			attachTable.Columns.Add("USER_CODE", typeof(string));
			attachTable.Constraints.Add("Key2", new DataColumn[] { attachTable.Columns["FUNCTION_CODE"], attachTable.Columns["FILE_NAME"] }, true);
			ds.Tables.Add(attachTable);

			for (int i = 0; i < 2; i++)
			{
				DataRow dr = table.NewRow();
				dr["FUNCTION_CODE"] = "FCODE" + i.ToString();
				table.Rows.Add(dr);

				for (int j = 0; j <= i; j++)
				{
					DataRow adr = attachTable.NewRow();
					adr["FUNCTION_CODE"] = dr["FUNCTION_CODE"];
					adr["FILE_NAME"] = @"c:\picture\pretty" + j.ToString() + ".jpg";
					adr["DESCRIPTION"] = "This is a description at the child level";
					attachTable.Rows.Add(adr);
				}
			}

			ds.Relations.Add(new DataRelation("PARENT", table.Columns["FUNCTION_CODE"], attachTable.Columns["FUNCTION_CODE"]));
			_uwg.DataSource = ds;
		}

		protected override void OnPreRender(EventArgs e)
		{
			base.OnPreRender(e);

			_uwg.DataBind();
		}
	}
}