ASP.Net User Controls as Static or Movable PopUps

using System;
using System.Collections;
using System.Configuration;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace CarboniSoftware.PopExample
{
	/// <summary>
	/// Summary description for MainPage.
	/// </summary>
	public class MainPage : System.Web.UI.Page
	{
		string msg;
		protected System.Web.UI.WebControls.Label lblPopInfo01;
		protected System.Web.UI.WebControls.Label lblPopInfo02;
		protected System.Web.UI.WebControls.Label lblPopInfo03;
		protected System.Web.UI.HtmlControls.HtmlAnchor aPopInfo01;
		protected System.Web.UI.HtmlControls.HtmlAnchor aPopInfo02;
		protected System.Web.UI.HtmlControls.HtmlAnchor aPopInfo03;
		protected System.Web.UI.HtmlControls.HtmlGenericControl PopHelpArea;
		protected System.Web.UI.HtmlControls.HtmlAnchor btnPop01;
		protected System.Web.UI.WebControls.Label Label1;
		public Hashtable	InfoLinks = new Hashtable();
		protected System.Web.UI.HtmlControls.HtmlGenericControl PopArea;
		protected System.Web.UI.WebControls.ListBox ListBox1;
		private CollapseControl cc;

		private void Page_Load(object sender, System.EventArgs e)
		{
			// Load the information text for the popups from XML file
			try
			{
				string infoLinksFileName = HttpContext.Current.Server.MapPath(ConfigurationSettings.AppSettings["infoLinksFile"]);
				InfoLinkItems infoLinkItems = new InfoLinkItems();
				infoLinkItems.ReadXml(infoLinksFileName);
				foreach (InfoLinkItems.InfoLinkItemRow ir in infoLinkItems.InfoLinkItem.Select("", ""))
				{
					this.InfoLinks.Add(ir.ID, ir);
				}
			}
			catch(Exception ex)
			{
				msg = ex.Message;
			}

			// Create the info popups
			CreateInfoPopup("InfoLink01", aPopInfo01);
			CreateInfoPopup("InfoLink02", aPopInfo02);
			CreateInfoPopup("InfoLink03", aPopInfo03);

			CreateCollapseControl();
		
		}

		/// <summary>
		/// CreateInfoPopup loads the hidden info popup control and populates
		/// the text from XML element identified.
		/// </summary>
		/// <param name="InfoLinkID">The ID of the info element in XML file</param>
		/// <param name="btnID">The object that, when clicked, will display info popup.</param>
		private void CreateInfoPopup(string InfoLinkID, HtmlAnchor btnID)
		{
			Control PopArea = Page.FindControl("PopHelpArea");

			InfoLinkItems.InfoLinkItemRow infoLink = 
				(InfoLinkItems.InfoLinkItemRow)this.InfoLinks[InfoLinkID];
			string popText  = infoLink.InfoLinkItem_Text;
			string helpCtrl = "PopUpHelp.ascx";
			PopUpHelp p = (PopUpHelp)LoadControl(helpCtrl);
			string PopUpID = infoLink.popID;
			p.SetPopUpID(PopUpID);
			p.SetPopUpText(popText);
			if (PopArea != null)
				PopArea.Controls.Add(p);

			btnID.Attributes.Add("onclick", "return !showPop('" + PopUpID + "', " + ListBox1.ClientID + ",event,true,0,0,false,null,true);");
		}

		private void CreateInitialItems()
		{
			ArrayList Items = new ArrayList();
			ArrayList ItemIDs = new ArrayList();
			Hashtable Groups = new Hashtable();
			ArrayList GroupOrder = new ArrayList();

			Items.Add("Item 1");
			Items.Add("Item 2");
			Items.Add("Item 3");
			Items.Add("Item 4");
			Items.Add("Item 5");
			Items.Add("Item 6");
			Items.Add("Item 7");
			Items.Add("Item 8");
			Items.Add("Item 9");
			Items.Add("Item 10");

			ItemIDs.Add("I01");
			ItemIDs.Add("I02");
			ItemIDs.Add("I03");
			ItemIDs.Add("I04");
			ItemIDs.Add("I05");
			ItemIDs.Add("I06");
			ItemIDs.Add("I07");
			ItemIDs.Add("I08");
			ItemIDs.Add("I09");
			ItemIDs.Add("I10");

			Session["Items"] = Items;
			Session["ItemIDs"] = ItemIDs;
			Session["Groups"] = Groups;
			Session["GroupOrder"] = GroupOrder;
		}

		private void LoadListBox(ArrayList Items, ArrayList ItemIDs, Hashtable Groups)
		{
			ArrayList DisplayItems = new ArrayList();
			ArrayList RemoveIDs = new ArrayList();

			if (Groups.Count > 0)
			{
				string GName;
				ArrayList GItems;
				IEnumerator en = Groups.GetEnumerator();
				en.Reset();
				while (en.MoveNext())
				{
					GName = (string)((DictionaryEntry)en.Current).Key;
					GItems = (ArrayList)((DictionaryEntry)en.Current).Value;

					bool bRemoveItems = (GName.Substring(0, 1) == "R") ? true : false;
					if (bRemoveItems)
					{
						for (int i=0; i<GItems.Count; i++)
							RemoveIDs.Add(ItemIDs.IndexOf(GItems[i]));
					}

					string GroupDisplay = GName.Substring(1) + " (";
					for (int i=0; i<GItems.Count; i++)
					{
						GroupDisplay += Items[ItemIDs.IndexOf(GItems[i])];
						if (i != GItems.Count-1)
							GroupDisplay += ", ";
					}
					GroupDisplay += ")";
					DisplayItems.Add(GroupDisplay);

				}
			}

			for (int i=0; i<Items.Count; i++)
			{
				if (!RemoveIDs.Contains(i))
					DisplayItems.Add(Items[i]);
			}

			ListBox1.DataSource = DisplayItems;
			ListBox1.DataBind();
		}

		private void CreateCollapseControl()
		{
			if (!this.IsPostBack || (Session["Items"] == null))
				CreateInitialItems();
			LoadListBox((ArrayList)Session["Items"], (ArrayList)Session["ItemIDs"], (Hashtable)Session["Groups"]);

			ArrayList Items = (ArrayList)Session["Items"];
			ArrayList ItemIDs = (ArrayList)Session["ItemIDs"];
			Hashtable Groups = (Hashtable)Session["Groups"];
			ArrayList GroupOrder = (ArrayList)Session["GroupOrder"];

			cc = (CollapseControl)LoadControl("CollapseControl.ascx");
			cc.ID = this.ID + "_cc_1";
			cc.CollapsePopulate(cc.ClientID, "Items", Items, ItemIDs, Groups, GroupOrder);
			cc.ColDoneClick += new EventHandler(cc_ColDoneClick);

			Control PopArea = Page.FindControl("PopArea");
			Control cc1 = PopArea.FindControl(cc.ClientID);
			if (cc1 != null)
				PopArea.Controls.Remove(cc1);
			PopArea.Controls.Add(cc);

			/////////////////////////////////////////////////////////////
			// Bug fix for IE 6.x and earlier only.  Selection controls 
			// have invalid z-orders, and must be hidden by script if
			// popup window overlaps any part of the control.  Javascript
			// method showPop must know the ids of the selection controls
			// used on this form.  They are passed here as an array of
			// clientIDs.  Javascript function will test for overlap and
			// hide the controls if necessary.
			string sbCtrlIDs = "['";
			// ADD YOUR SELECTION CONTROLS HERE: example>>>>
			//sbCtrlIDs += ddlMyDropList.ClientID;
			//sbCtrlIDs += "', '";
			//sbCtrlIDs += ddlMyListBox.ClientID;
			sbCtrlIDs += "']";
			
			// Add script to register controls with javascript variables
			Control jsc = Page.FindControl("JSArea");
			if (jsc != null)
			{
				LiteralControl jlc = new LiteralControl("<script language='javascript'>registerIEWindowCtrls(" + sbCtrlIDs + ");</script>\r\n");
				jsc.Controls.Add(jlc);
			}
			//
			/////////////////////////////////////////////////////////////
			btnPop01.Attributes.Add("onclick", "return !showPop('" + cc.ClientID + "_CollapseContainer'," + ListBox1.ClientID + ",event,false,-10,-30,true," +sbCtrlIDs+ ",false);");
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void cc_ColDoneClick(object sender, EventArgs e)
		{
			if (sender.GetType().Name != "CollapseControl_ascx")
				return;

			CollapseControl ccSender = (CollapseControl)sender;

			Session["Groups"] = ccSender.NewGroups;
			Session["GroupOrder"] = ccSender.NewGroupOrder;

			CreateCollapseControl();
		}

	}
}