SharePoint CAML Query Builder Dialog for your Web Parts

using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using System.Web;

namespace Mullivan.SharePoint.WebParts
{
    public class LibNavLinksEditor : EditorPart
    {
        private TextBox _tboxViewState;
        private Literal _litHtml;
        private string _startUpScriptName;

        public LibNavLinksEditor(string webPartId)
        {
            this.ID = webPartId + "_LibNavLinksEditor";
            _startUpScriptName = this.ID + "_Init";
        }

        protected override void OnInit(EventArgs e)
        {
            _tboxViewState = new TextBox();
            _tboxViewState.ID = "lnwpEditorViewState";
            _tboxViewState.Style[HtmlTextWriterStyle.Visibility] = "hidden";
            _tboxViewState.Style[HtmlTextWriterStyle.Display] = "none";

            _litHtml = new Literal();
            _litHtml.Text = Properties.Resources.LibraryNavigation;

            this.Style[HtmlTextWriterStyle.TextAlign] = "left";

            base.OnInit(e);
        }

        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            this.Controls.Add(_tboxViewState);
            this.Controls.Add(_litHtml);
        }

        protected override void OnLoad(EventArgs e)
        {
            ClientScriptManager csm = this.Page.ClientScript;
            Type lnType = this.GetType();

            string strEditUrl = csm.GetWebResourceUrl(lnType, "Mullivan.SharePoint.WebParts.Images.Edit.png");
            string strAddUrl = csm.GetWebResourceUrl(lnType, "Mullivan.SharePoint.WebParts.Images.Add.png");
            string strRemoveUrl = csm.GetWebResourceUrl(lnType, "Mullivan.SharePoint.WebParts.Images.Remove.png");
            string strArrowUpUrl = csm.GetWebResourceUrl(lnType, "Mullivan.SharePoint.WebParts.Images.ArrowUp.png");
            string strArrowDownUrl = csm.GetWebResourceUrl(lnType, "Mullivan.SharePoint.WebParts.Images.ArrowDown.png");

            EnsureChildControls();

            _litHtml.Text = string.Format(_litHtml.Text,
                this.ClientID,
                _tboxViewState.ClientID,
                strAddUrl,
                strRemoveUrl,
                strArrowUpUrl,
                strArrowDownUrl,
                strEditUrl,
                SPContext.Current.Web.ServerRelativeUrl.Replace("/", "\\u002f"));

            base.OnLoad(e);
        }

        protected override void OnPreRender(EventArgs e)
        {
            ClientScriptManager csm = this.Page.ClientScript;
            Type lnType = this.GetType();
            //Register our Javascript file
            if (!csm.IsClientScriptIncludeRegistered(@"Mullivan.SharePoint.WebParts.JS.Utility.js"))
            {
                string url = csm.GetWebResourceUrl(lnType, @"Mullivan.SharePoint.WebParts.JS.Utility.js");
                csm.RegisterClientScriptInclude(lnType, "Mullivan.SharePoint.WebParts.JS.Utility.js", ResolveClientUrl(url));
            }

            if (!csm.IsClientScriptIncludeRegistered(@"PickerTreeDialog"))
            {
                string url = @"/_layouts/1033/PickerTreeDialog.js";
                csm.RegisterClientScriptInclude(lnType, "PickerTreeDialog", url);
            }

            if (!csm.IsClientScriptIncludeRegistered(@"QueryBuilderDialog"))
            {
                string url = @"/_layouts/1033/QueryBuilder.js";
                csm.RegisterClientScriptInclude(lnType, "QueryBuilderDialog", url);
            }

            if (!csm.IsStartupScriptRegistered(_startUpScriptName))
            {
                csm.RegisterStartupScript(lnType, _startUpScriptName, GenerateStartScript());
            }

            base.OnPreRender(e);
        }

        private string GenerateStartScript()
        {
            return string.Format(@"
<script type=""text/javascript"">
LPNW_InitConfiguration('{0}', '{1}');
</script>"
                ,_tboxViewState.ClientID, this.ClientID);
        }

        public override bool ApplyChanges()
        {
            EnsureChildControls();

            LibraryNavigationWebPart lnwp = this.WebPartToEdit as LibraryNavigationWebPart;
            if (lnwp != null)
                lnwp.LinksConfiguration = this._tboxViewState.Text;

            return true;
        }

        public override void SyncChanges()
        {
            EnsureChildControls();

            LibraryNavigationWebPart lnwp = this.WebPartToEdit as LibraryNavigationWebPart;
            if (lnwp == null)
                this._tboxViewState.Text = "<Links></Links>";
            else
                this._tboxViewState.Text = lnwp.LinksConfiguration;
        }
    }
}