Martin Bowlings Hacky MultilineEntryElement For MonoTouch.Dialog.cs

	
	public class MultilineEntryElement : Element, IElementSizing  {
		public string Value;
		static NSString ekey = new NSString ("EntryElement");
		bool isPassword;
		UITextView entry;
		string placeholder;
		static UIFont font = UIFont.BoldSystemFontOfSize (17);
		
		/// <summary>
		/// Constructs an EntryElement with the given caption, placeholder and initial value.
		/// </summary>
		/// <param name="caption">
		/// The caption to use
		/// </param>
		/// <param name="placeholder">
		/// Placeholder to display.
		/// </param>
		/// <param name="value">
		/// Initial value.
		/// </param>
		public MultilineEntryElement (string caption, string placeholder, string value) : base (caption)
		{
			Value = value;
			this.placeholder = placeholder;
		}
		
		/// <summary>
		/// Constructs  an EntryElement for password entry with the given caption, placeholder and initial value.
		/// </summary>
		/// <param name="caption">
		/// The caption to use
		/// </param>
		/// <param name="placeholder">
		/// Placeholder to display.
		/// </param>
		/// <param name="value">
		/// Initial value.
		/// </param>
		/// <param name="isPassword">
		/// True if this should be used to enter a password.
		/// </param>

		public override string Summary ()
		{
			return Value;
		}

		// 
		// Computes the X position for the entry by aligning all the entries in the Section
		//
		SizeF ComputeEntryPosition (UITableView tv, UITableViewCell cell)
		{
			Section s = Parent as Section;
			if (s.EntryAlignment.Width != 0)
				return s.EntryAlignment;
			
			SizeF max = new SizeF (-1, -1);
			foreach (var e in s.Elements){
				var ee = e as MultilineEntryElement;
				if (ee == null)
					continue;
				
				var size = tv.StringSize (ee.Caption, font);
				if (size.Width > max.Width)
					max = size;				
			}
			s.EntryAlignment = new SizeF (25 + Math.Min (max.Width, 160), max.Height);
			return s.EntryAlignment;
		}
		
		public override UITableViewCell GetCell (UITableView tv)
		{
			var cell = tv.DequeueReusableCell (ekey);
			if (cell == null){
				cell = new UITableViewCell (UITableViewCellStyle.Default, ekey);
				cell.SelectionStyle = UITableViewCellSelectionStyle.None;
			} else 
				RemoveTag (cell, 1);
			
			
			if (entry == null){
				SizeF size = ComputeEntryPosition (tv, cell);
				/*entry = new UITextField (new RectangleF (size.Width, (cell.ContentView.Bounds.Height-size.Height)/2-1, 320-size.Width, size.Height)){
					Tag = 1,
					Placeholder = placeholder,
					SecureTextEntry = isPassword
				};*/
				entry = new UITextView(new RectangleF(size.Width,(cell.ContentView.Bounds.Height-size.Height)/2-1, 320-size.Width, 96));
				entry.Text = Value ?? "";
				entry.AutoresizingMask = UIViewAutoresizing.FlexibleWidth |
					UIViewAutoresizing.FlexibleLeftMargin;
				
				entry.Ended += delegate {
					Value = entry.Text;
				};
				entry.ReturnKeyType = UIReturnKeyType.Done;
				entry.Changed += delegate(object sender, EventArgs e) {
					int i = entry.Text.IndexOf("\n", entry.Text.Length -1);
					if (i > -1)
					{
						entry.Text = entry.Text.Substring(0,entry.Text.Length -1); 
						entry.ResignFirstResponder();	
					}
				};
			}
	
			
			cell.TextLabel.Text = Caption;
			cell.ContentView.AddSubview (entry);
			return cell;
		}
		
		protected override void Dispose (bool disposing)
		{
			if (disposing){
				entry.Dispose ();
				entry = null;
			}
		}
		
		public float GetHeight (UITableView tableView, NSIndexPath indexPath)
		{
			return 112;
		}
	}