centerImageMT

using System;
using MonoTouch.Dialog;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using System.Drawing;

namespace MenuFinderMT
{
    //cell.ImageView.ContentMode = UIViewContentMode.Center;
    public class JMAImageElement : Element, IElementSizing
    {
        static NSString skey = new NSString ("About_Image");
        UIImage image;
        float limit = 600;
        DialogViewController dvc;

        public JMAImageElement (string caption, byte[] bytes, DialogViewController dvc)
            : base(string.Empty)
        {
            this.dvc = dvc;
            SizeF sz = new SizeF (600, 600);

            //320 x 480 old iPhone support
            if(dvc.View.Frame.Width < 600)
            {
                limit = (float)dvc.View.Frame.Width - 200;
                sz = new SizeF(300, 300);
            }


            this.image = Scale (GetImagefromByteArray(bytes), sz);
        }

        public override UITableViewCell GetCell (UITableView tv)
        {
            var cell = tv.DequeueReusableCell (skey);
            if (cell == null) {
                cell = new UITableViewCell (UITableViewCellStyle.Default, skey)
                {
                    SelectionStyle = UITableViewCellSelectionStyle.None,
                    Accessory = UITableViewCellAccessory.None,
                };
            }
            if (null != image) {
                cell.ImageView.Image = image;
                cell.ImageView.ContentMode = UIViewContentMode.Center;
            }


            return cell;
        }

        public float GetHeight (UITableView tableView, NSIndexPath indexPath)
        {
            float height = 100;
            if (null != image)
                height = image.Size.Height;
            return height;
        }

        UIImage GetImagefromByteArray (byte[] imageBuffer)
        {
            NSData imageData = NSData.FromArray (imageBuffer);
            return UIImage.LoadFromData (imageData);
        }

        UIImage Scale (UIImage source, SizeF newSize)
        {
            if ((dvc.View.Frame.Size.Width > limit) || (dvc.View.Frame.Size.Height > limit)) {
                UIGraphics.BeginImageContext (newSize);
                var context = UIGraphics.GetCurrentContext ();
                context.TranslateCTM (0, newSize.Height);
                context.ScaleCTM (1f, -1f);

                context.DrawImage (new RectangleF (0, 0, newSize.Width, newSize.Height), source.CGImage);

                var scaledImage = UIGraphics.GetImageFromCurrentImageContext ();
                UIGraphics.EndImageContext ();

                return scaledImage;
            } else {
                return source;
            }
        }

        public override void Selected (DialogViewController dvc, UITableView tableView, NSIndexPath indexPath)
        {
            //base.Selected(dvc, tableView, path);
            tableView.DeselectRow (indexPath, true);
        }
    }
}