The Application Automation Layer - Using XML to generate Menus

using System;
using System.Collections;
using System.Data;
using System.Drawing;
using System.Windows.Forms;

namespace AAL
{
	internal class AALListView : AALControl
	{
		private ArrayList columnWidths;

		public AALListView(ControlInfo ci) : base(ci)
		{
		}

		public override void Create()
		{
			ListView lv=new SmartListView();
			sysctrl=lv;
			sysctrl.Text=ctrlInfo.caption;
			sysctrl.Location=ctrlInfo.pos;
			sysctrl.Size=ctrlInfo.size;
			lv.MultiSelect=false;
			lv.FullRowSelect=true;
			lv.View=View.Details;
			if (ctrlInfo.HasOption("Grid"))
			{
				lv.GridLines=true;
			}
			sysctrl.Visible=true;
			columnWidths=new ArrayList();
			LoadHeader();
			LoadDataSet();
		}

		private void LoadHeader()
		{
			foreach (DataRow row in header.Rows)
			{
				string caption=row["Name"] as string;
				string align=header.Columns.Contains("Justification") ? (string)row["Justification"] : "";
				int width=Convert.ToInt32(row["Width"]);
				columnWidths.Add(width);
				if (width < 0)
				{
					width=-width;
				}
				if (width==0)
				{
					// ignore zero width fields
					continue;
				}
				HorizontalAlignment just=HorizontalAlignment.Left;
				switch (align)
				{
					case "Right":
						just=HorizontalAlignment.Right;
						break;

					case "Center":
						just=HorizontalAlignment.Center;
						break;
				}
				((ListView)sysctrl).Columns.Add(caption, width, just);
			}
		}

		private void LoadDataSet()
		{
			int itemNum=Convert.ToInt32(ctrlInfo.formMgr.IDH.GetDatum(ctrlInfo.VarName));
			Lib.Matrix dataSet=ctrlInfo.formMgr.IDH.GetDatum(ctrlInfo.ListName) as Lib.Matrix;
			if (dataSet==null)
			{
				// not yet defined!
				return;
			}

			for (int i=0; i<dataSet.Rows; i++)
			{
				ListViewItem lvi=new ListViewItem();
				if (itemNum==0)
				{
					lvi.Selected=true;
				}
				--itemNum;
				int n=0;
				for (int j=0; j<columnWidths.Count; j++)
				{
					if ((int)columnWidths[j] != 0)
					{
						lvi.SubItems.Add("");
						lvi.SubItems[n].Text=dataSet[j][i];
						++n;
					}
				}
				((ListView)sysctrl).Items.Add(lvi);
			}
		}

		public override void UpdateStorage()
		{
			int idx;
			ListView.SelectedIndexCollection sic=((ListView)sysctrl).SelectedIndices;
			if (sic.Count==0)
			{
				idx=-1;
			}
			else
			{
				idx=sic[0];
			}
			ctrlInfo.formMgr.IDH.SetDatum(ctrlInfo.VarName, idx.ToString());
		}

		public override void UpdateControl()
		{
		}

		public override void UpdateControlList()
		{
			((ListView)sysctrl).Items.Clear();
			LoadDataSet();
		}
	}

	internal class SmartListView : ListView
	{
		public SmartListView()
		{
		}

		protected override CreateParams CreateParams 
		{
			get 
			{
				CreateParams cp = base.CreateParams;
				cp.Style=(int)((uint)cp.Style | 8);		// LVS_SHOWALWAYS
				return cp;
			}
		}
	}

}