RTLSupport.cs

#region Copyright Syncfusion Inc. 2001-2024.
// Copyright Syncfusion Inc. 2001-2024. All rights reserved.
// Use of this code is subject to the terms of our license.
// A copy of the current license can be obtained at any time by e-mailing
// licensing@syncfusion.com. Any infringement will be prosecuted under
// applicable laws. 
#endregion
using System;
using System.IO;
using Syncfusion.Drawing;
using System.Reflection;
using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
#if __UNIFIED__
using Foundation;
using UIKit;
using CoreGraphics;
#else
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MonoTouch.CoreGraphics;
using CGRect = System.Drawing.RectangleF;
using CGPoint = System.Drawing.PointF;
using CGSize = System.Drawing.SizeF;
#endif

namespace SampleBrowser
{
    public partial class RTLSupport : SampleView
    {
        CGRect frameRect = new CGRect();
        float frameMargin = 8.0f;     
		UILabel label1;
		UIButton button ;
        public RTLSupport()
        {
            label1 = new UILabel();
		  button = new UIButton(UIButtonType.System);
		  button.TouchUpInside += OnButtonClicked;
        }

        void LoadAllowedTextsLabel()
        {   
            label1.Frame = frameRect;
            label1.TextColor = UIColor.FromRGB(38 / 255.0f, 38 / 255.0f, 38 / 255.0f);
            label1.Text = "This sample demonstrates drawing right-to-left language text in the PDF document.";
            label1.Font = UIFont.SystemFontOfSize(15);
            label1.Lines = 0;
            label1.LineBreakMode = UILineBreakMode.WordWrap;
            if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad)
            {
                label1.Font = UIFont.SystemFontOfSize(18);
                label1.Frame = new CGRect(0, 12, frameRect.Location.X + frameRect.Size.Width, 50);
            }
            else {
                label1.Frame = new CGRect(frameRect.Location.X, 12, frameRect.Size.Width, 50);

            }
            this.AddSubview(label1);

            button.SetTitle("Generate PDF", UIControlState.Normal);
            if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad)
            {
                button.Frame = new CGRect(0, 70, frameRect.Location.X + frameRect.Size.Width, 10);
            }
            else {
                button.Frame = new CGRect(frameRect.Location.X, 70, frameRect.Size.Width, 10);

            }
           
            this.AddSubview(button);
        }

        void OnButtonClicked(object sender, EventArgs e)
        {
            //Create a new PDF document
            PdfDocument document = new PdfDocument();

            //Add a page
            PdfPage page = document.Pages.Add();

            //Create font
            Stream arialFontStream = typeof(RTLSupport).GetTypeInfo().Assembly.GetManifestResourceStream("SampleBrowser.Samples.PDF.Assets.arial.ttf");
            PdfFont font = new PdfTrueTypeFont(arialFontStream, 14);

            //Read the text from text file
            Stream rtlText = typeof(RTLSupport).GetTypeInfo().Assembly.GetManifestResourceStream("SampleBrowser.Samples.PDF.Assets.arabic.txt");
            StreamReader reader = new StreamReader(rtlText, System.Text.Encoding.Unicode);
            string text = reader.ReadToEnd();
            reader.Dispose();

            //Create a brush
            PdfBrush brush = new PdfSolidBrush(new PdfColor(0, 0, 0));
            PdfPen pen = new PdfPen(new PdfColor(0, 0, 0));
            SizeF clipBounds = page.Graphics.ClientSize;
            RectangleF rect = new RectangleF(0, 0, clipBounds.Width, clipBounds.Height);

            //Set the property for RTL text
            PdfStringFormat format = new PdfStringFormat();
            format.TextDirection = PdfTextDirection.RightToLeft;
            format.Alignment = PdfTextAlignment.Right;
            format.ParagraphIndent = 35f;

            //Draw text.
            page.Graphics.DrawString(text, font, brush, rect, format);
            
            MemoryStream stream = new MemoryStream();
            //Save the PDF dcoument.
            document.Save(stream);

            //Close the PDF document.
            document.Close();
			
            stream.Position = 0;

            if (stream != null)
            {
                SaveiOS iosSave = new SaveiOS();
                iosSave.Save("RTLText.pdf", "application/pdf", stream);
            }
        }
        public override void LayoutSubviews()
        {
            if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad)
            {
                frameMargin = 0.0f;
            }
            frameRect = Bounds;
            frameRect.Location = new CGPoint(frameRect.Location.X + frameMargin, frameRect.Location.Y + 1.5f * frameMargin);
            frameRect.Size = new CGSize(frameRect.Size.Width - (frameRect.Location.X + frameMargin), frameRect.Size.Height - (frameRect.Location.Y + 1.5f * frameMargin));

            LoadAllowedTextsLabel();

            base.LayoutSubviews();
        }
    }
}