using System;

using System.Web.UI;

using System.Web.UI.WebControls;



namespace TemplateApp.Templates

{

    /// <summary>

    /// Base template for site

    /// </summary>

    public class PageTemplate : Page

    {

        // HTML title

        private System.Web.UI.LiteralControl _title = 

            new System.Web.UI.LiteralControl();

        // Stylesheet file location

        private System.Web.UI.LiteralControl _styleSheet = 

            new System.Web.UI.LiteralControl();



        /// <summary>

        /// Common site web user control.

        /// </summary>

        protected TemplateApp.Components.TopBar TopBar;



        /// <summary>

        /// Temporary control collection to hold parsed controls.

        /// </summary>

        protected ControlCollection ControlBin;



        /// <summary>

        /// Placeholder for the HTML HEAD section.

        /// </summary>

        protected PlaceHolder Head = new PlaceHolder();

        /// <summary>

        /// Placeholder for the body/content section of the form; 

        /// all controls on inheritors will be added to this.

        /// </summary>

        protected PlaceHolder Body = new PlaceHolder();

        /// <summary>

        /// Standard form for the page

        /// </summary>

        protected System.Web.UI.HtmlControls.HtmlForm MainForm = 

            new System.Web.UI.HtmlControls.HtmlForm();



        /// <summary>

        /// Gets or sets HTML title for the page

        /// </summary>

        protected string Title

        {

            get

            {

                return this._title.Text;

            }

            set

            {

                this._title.Text = "My Site Title Prefix: " + value;

                ViewState["PageTitle"] = this._title.Text;

            }

        }



        /// <summary>

        /// Gets or sets stylesheet location

        /// </summary>

        protected string StyleSheet

        {

            get

            {

                return this._styleSheet.Text;

            }

            set

            {

                this._styleSheet.Text = value;

                ViewState["StyleSheet"] = this._styleSheet.Text;

            }

        }



        /// <summary>

        /// Receives the objects parsed from the ASPX page and 

        /// adds them to a private control collection.

        /// </summary>

        /// <param name="obj">Parsed object.</param>

        protected override void AddParsedSubObject(Object obj) 

        {

            // if this is the first time here, 

            // instantiate our control collection

            if (ControlBin == null)

                ControlBin = new ControlCollection(this);

            

            // add the control to our holding bin collection

            this.ControlBin.Add((System.Web.UI.Control)obj);

        }



        /// <summary>

        /// Page init; calls private method LoadControls, 

        /// which adds IDs to template controls, loads the 

        /// TopBar control, and defines the template page layout

        /// </summary>

        /// <param name="e">Page init event arguments</param>

        protected override void OnInit(EventArgs e)

        {

            this.LoadControls();

            base.OnInit(e);

        }

    

        /// <summary>

        /// Adds IDs to template controls, loads the TopBar control, 

        /// and defines the template page layout

        /// </summary>

        private void LoadControls()

        {

            // Load TopBar control; this is just an example of how to 

            // use a user control w/ the template; actual control 

            // not included in sample

            this.TopBar = (TemplateApp.Components.TopBar)this.LoadControl(

                this.Request.ApplicationPath + "/Components/TopBar.ascx");

            // Add IDs to template controls

            this.Head.ID = "HEAD";

            this.TopBar.ID = "TopBar";

            this.MainForm.ID = "MainForm";

            this.Body.ID = "BODY";



            // /////////////////

            // Begin page layout

            // /////////////////

            // Add standard HTML, title, & stylesheet tags

            AddStaticText(

                "<!DOCTYPE HTML PUBLIC " + 

                "\"-//W3C//DTD HTML 4.0 Transitional//EN\" >" + 

                "<html>\n" +

                "<head>\n" +

                "<title>");

            this.Controls.Add(this._title);

            AddStaticText("</title>\n" +

                "<link type=\"text/css\" rel=\"stylesheet\" href=\"");

            this.Controls.Add(this._styleSheet);

            AddStaticText("\">\n");

            // Add Head to the HEAD section

            this.Controls.Add(this.Head);

            // Close Head section; open body section

            AddStaticText(

                "</head>\n" +

                "<body>\n");

            // Add the TopBar control to top of form

            this.MainForm.Controls.Add(this.TopBar);

            // Add a central div for body to form

            this.MainForm.Controls.Add(

                new LiteralControl("<div id=\"bodyDiv\">"));

            // Load all of the controls from the child page into 

            // the Body PlaceHolder on the template

            for(int i = 0; i < ControlBin.Count; i++)

            {

                switch (ControlBin[i].GetType().FullName)

                {

                    case "System.Web.UI.WebControls.Image":

                        ((Image)ControlBin[i]).ImageUrl =

                            this.Request.ApplicationPath + "/" + 

                            ((Image)ControlBin[i]).ImageUrl;

                        break;

                    case "System.Web.UI.WebControls.ImageButton":

                        ((ImageButton)ControlBin[i]).ImageUrl =

                            this.Request.ApplicationPath + "/" + 

                            ((ImageButton)ControlBin[i]).ImageUrl;

                        break;

                    case "System.Web.UI.WebControls.HyperLink":

                        ((HyperLink)ControlBin[i]).NavigateUrl =

                            this.Request.ApplicationPath + "/" + 

                            ((HyperLink)ControlBin[i]).NavigateUrl;

                        break;

                }

                this.Body.Controls.Add(ControlBin[i]);

            }

            // Add body placeholder to form

            this.MainForm.Controls.Add(this.Body);

            // Add close body div and add standard footer to form

            this.MainForm.Controls.Add(new LiteralControl(

                "</div>" + 

                "<div class=\"templateFooter\"><nobr>" + 

                "Copyright &copy; 2002 My Company</nobr></div>"));

            // Add form to page

            this.Controls.Add(this.MainForm);

            // close standard body & HTML tags

            AddStaticText(

                "</body>\n" +

                "</html>\n");

        }



        // Helper method to add literal controls to page

        private void AddStaticText(string output)

        {

            this.Controls.Add(new LiteralControl(output));

        }



        /// <summary>

        /// Loads view state for page.

        /// </summary>

        /// <param name="savedState">Saved state.</param>

        protected override void LoadViewState(object savedState)

        {

            base.LoadViewState (savedState);

            // Initialize Page Title & Stylesheet

            this._title.Text = Convert.ToString(ViewState["PageTitle"]);

            if (this._title.Text == string.Empty)

                this._title.Text = "My Default Title Here";

            this._styleSheet.Text = Convert.ToString(ViewState["StyleSheet"]);

            if (this._styleSheet.Text == string.Empty)

                this._styleSheet.Text = "myDefaultStyleSheet.css";

        }





    }





}