using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Drawing;

// Use EVO PDF Namespace
using EvoPdfClient;

namespace EvoHtmlToPdfDemo.HTML_to_PDF.PDF_Viewer_Preferences
{
    public partial class Set_Initial_Zoom_Level : System.Web.UI.Page
    {
        protected void convertToPdfButton_Click(object sender, EventArgs e)
        {
            // Get the server IP and port
            String serverIP = textBoxServerIP.Text;
            uint serverPort = uint.Parse(textBoxServerPort.Text);

            // Create a HTML to PDF converter object
            HtmlToPdfConverter htmlToPdfConverter = null;
            if (radioButtonUseTcpService.Checked)
                htmlToPdfConverter = new HtmlToPdfConverter(serverIP, serverPort);
            else
                htmlToPdfConverter = new HtmlToPdfConverter(true, textBoxWebServiceUrl.Text);

            // Set optional service password
            if (textBoxServicePassword.Text.Length > 0)
                htmlToPdfConverter.ServicePassword = textBoxServicePassword.Text;

            // Set license key received after purchase to use the converter in licensed mode
            // Leave it not set to use the converter in demo mode
            htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";
            
            // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
            // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
            htmlToPdfConverter.ConversionDelay = 2;

            // Convert a HTML page to a PDF document object
            Document pdfDocument = htmlToPdfConverter.ConvertUrlToPdfDocumentObject(urlTextBox.Text);

            int goToPageNumber = int.Parse(pageNumberTextBox.Text);

            // Get destination PDF page
            PdfPage goToPage = pdfDocument.GetPage(goToPageNumber - 1);

            // Get the destination point in PDF page
            float goToX = float.Parse(xLocationTextBox.Text);
            float goToY = float.Parse(yLocationTextBox.Text);

            PointFloat goToLocation = new PointFloat(goToX, goToY);

            // Get the destination view mode
            DestinationViewMode viewMode = SelectedViewMode();

            // Create the destination in PDF document
            ExplicitDestination goToDestination = new ExplicitDestination(goToPage, goToLocation, viewMode);

            // Set the zoom level when the destination is displayed
            if (viewMode == DestinationViewMode.XYZ)
                goToDestination.ZoomPercentage = int.Parse(zoomLevelTextBox.Text);

            // Set the document Go To open action
            pdfDocument.OpenAction = new PdfActionGoTo(goToDestination);

            // Save the PDF document in a memory buffer
            byte[] outPdfBuffer = pdfDocument.Save();

            // Send the PDF as response to browser

            // Set response content type
            Response.AddHeader("Content-Type", "application/pdf");

            // Instruct the browser to open the PDF file as an attachment or inline
            Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Set_Initial_Zoom_Level.pdf; size={0}", outPdfBuffer.Length.ToString()));

            // Write the PDF document buffer to HTTP response
            Response.BinaryWrite(outPdfBuffer);

            // End the HTTP response and stop the current page processing
            Response.End();
        }

        private DestinationViewMode SelectedViewMode()
        {
            switch (viewModeComboBox.SelectedValue)
            {
                case "X, Y and Zoom":
                    return DestinationViewMode.XYZ;
                case "Fit Window":
                    return DestinationViewMode.Fit;
                case "Fit Horizontally":
                    return DestinationViewMode.FitH;
                case "Fit Vertically":
                    return DestinationViewMode.FitV;
                default:
                    return DestinationViewMode.XYZ;
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                viewModeComboBox.SelectedValue = "X, Y and Zoom";

                sampleCodeLiteral.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/Code_Samples/CSharp/AspNet/HTML_to_PDF/PDF_Viewer/Set_Initial_Zoom_Level.html"));
                descriptionLiteral.Text = System.IO.File.ReadAllText(Server.MapPath("~/DemoAppFiles/Input/Descriptions/AspNet/HTML_to_PDF/PDF_Viewer/Set_Initial_Zoom_Level.html"));

                Master.CollapseAll();
                Master.ExpandNode("HTML_to_PDF");
                Master.ExpandNode("PDF_Viewer_Preferences");
                Master.SelectNode("Set_Initial_Zoom_Level");
            }
        }

        protected void viewModeComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            zoomLevelPanel.Visible = SelectedViewMode() == DestinationViewMode.XYZ;
        }

        protected void demoMenu_MenuItemClick(object sender, MenuEventArgs e)
        {
            switch (e.Item.Value)
            {
                case "Live_Demo":
                    demoMultiView.SetActiveView(liveDemoView);
                    break;
                case "Description":
                    demoMultiView.SetActiveView(descriptionView);
                    break;
                case "Sample_Code":
                    demoMultiView.SetActiveView(sampleCodeView);
                    break;
                default:
                    break;
            }
        }
    }
}