ios-samples/MonoCatalogSample/textfield.cs

//
// Textfields sample ported to C#
//
using System;
using MonoTouch.UIKit;
using MonoTouch.Foundation;
using System.Drawing;

public partial class TextFieldController : UITableViewController {

	public TextFieldController () : base ("TextFieldController", null) {
	}
	
	const int kViewTag = 1;
	
	class DataSource : UITableViewDataSource {
		TextFieldController tvc;
		static NSString kDisplayCell_ID = new NSString ("CellTextField_ID");
		static NSString kSourceCell_ID = new NSString ("SourceCell_ID");
		
		public DataSource (TextFieldController tvc)
		{
			this.tvc = tvc;
		}

		public override int NumberOfSections (UITableView tableView)
		{
			return tvc.samples.Length;
		}

		public override string TitleForHeader (UITableView tableView, int section)
		{
			return tvc.samples [section].Title;
		}

		public override int RowsInSection (UITableView tableView, int section)
		{
			return 2;
		}

		public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
		{
			UITableViewCell cell = null;
			int row = indexPath.Row;

			if (row == 0){
				cell = tableView.DequeueReusableCell (kDisplayCell_ID);
				if (cell == null){
					cell = new UITableViewCell (UITableViewCellStyle.Default, kDisplayCell_ID);
					cell.SelectionStyle = UITableViewCellSelectionStyle.None;
				} else {
					// The cell is being recycled, remove the old content
					UIView viewToRemove = cell.ContentView.ViewWithTag (kViewTag);
					if (viewToRemove != null)
						viewToRemove.RemoveFromSuperview ();
				}
				cell.ContentView.AddSubview (tvc.samples [indexPath.Section].View);
			} else {
				cell = tableView.DequeueReusableCell (kSourceCell_ID);
				if (cell == null){
					// Construct the cell with reusability (the second argument is not null)
					cell = new UITableViewCell (UITableViewCellStyle.Default, kSourceCell_ID);
					cell.SelectionStyle = UITableViewCellSelectionStyle.None;
					var label = cell.TextLabel;
					
					label.Opaque = false;
					label.TextAlignment = UITextAlignment.Center;
					label.TextColor = UIColor.Gray;
					label.Lines = 1;
					label.HighlightedTextColor = UIColor.Black;
					label.Font = UIFont.SystemFontOfSize (12f);
				}
				cell.TextLabel.Text = tvc.samples [indexPath.Section].Source;
			}

			return cell;
		}
	}

	class TableDelegate : UITableViewDelegate {
		// Override to provide the sizing of the rows in our table
		public override float GetHeightForRow (UITableView tableView, NSIndexPath indexPath)
		{
			return indexPath.Row == 0 ? 50f : 22f;
		}
	}

	bool DoReturn (UITextField tf)
	{
		tf.ResignFirstResponder ();
		return true;
	}
	
	UITextField TextFieldNormal ()
	{
		return new UITextField (new RectangleF (30f, 8f, 260f, 30f)){
			BorderStyle = UITextBorderStyle.Bezel,
			TextColor = UIColor.Black,
			Font = UIFont.SystemFontOfSize (17f),
			Placeholder = "<enter text>",
			BackgroundColor = UIColor.White,
			AutocorrectionType = UITextAutocorrectionType.No,
			KeyboardType = UIKeyboardType.Default,
			ReturnKeyType = UIReturnKeyType.Done,
			ClearButtonMode = UITextFieldViewMode.WhileEditing,
			Tag = kViewTag,
			ShouldReturn = DoReturn,
		};
	}

	UITextField TextFieldRounded ()
	{
		return new UITextField (new RectangleF (30f, 8f, 260f, 30f)){
			BorderStyle = UITextBorderStyle.RoundedRect,
			TextColor = UIColor.Black,
			Font = UIFont.SystemFontOfSize (17f),
			Placeholder = "<enter text>",
			BackgroundColor = UIColor.White,
			AutocorrectionType = UITextAutocorrectionType.No,
			KeyboardType = UIKeyboardType.Default,
			ReturnKeyType = UIReturnKeyType.Done,
			ClearButtonMode = UITextFieldViewMode.WhileEditing,
			Tag = kViewTag,
			ShouldReturn = DoReturn
		};
	}

	UITextField TextFieldSecure ()
	{
		return new UITextField (new RectangleF (30f, 8f, 260f, 30f)){
			BorderStyle = UITextBorderStyle.Bezel,
			TextColor = UIColor.Black,
			Font = UIFont.SystemFontOfSize (17f),
			Placeholder = "<enter text>",
			BackgroundColor = UIColor.White,
			AutocorrectionType = UITextAutocorrectionType.No,
			KeyboardType = UIKeyboardType.Default,
			ReturnKeyType = UIReturnKeyType.Done,
			ClearButtonMode = UITextFieldViewMode.WhileEditing,
			SecureTextEntry = true,
			Tag = kViewTag,
			ShouldReturn = DoReturn
		};
	}


	UITextField TextFieldLeftView ()
	{
		return new UITextField (new RectangleF (30f, 8f, 260f, 30f)){
			BorderStyle = UITextBorderStyle.Bezel,
			TextColor = UIColor.Black,
			Font = UIFont.SystemFontOfSize (17f),
			Placeholder = "<enter text>",
			BackgroundColor = UIColor.White,
			AutocorrectionType = UITextAutocorrectionType.No,
			KeyboardType = UIKeyboardType.Default,
			ReturnKeyType = UIReturnKeyType.Done,
			ClearButtonMode = UITextFieldViewMode.WhileEditing,
			Tag = kViewTag,
			ShouldReturn = DoReturn,
			
			LeftView = new UIImageView (UIImage.FromFile ("segment_check.png")),
			LeftViewMode = UITextFieldViewMode.Always
		};
	}
	
	struct TextFieldSample {
		public string Title, Source;
		public UITextField View;

		public TextFieldSample (string t, string s, UITextField b)
		{
			Title = t;
			Source = s;
			View = b;
		}
	}

	TextFieldSample [] samples;

	public override void ViewDidLoad ()
	{
		base.ViewDidLoad ();
		Title = "Text Field";

		samples = new TextFieldSample [] {
			new TextFieldSample ("UITextField", "textfield.cs: TextFieldNormal()", TextFieldNormal ()),
			new TextFieldSample ("UITextField Rounded", "textfield.cs: TextFieldRounded ()", TextFieldRounded ()),
			new TextFieldSample ("UITextField Secure", "textfield.cs: TextFieldSecure ()", TextFieldSecure ()),
			new TextFieldSample ("UITextField (with LeftView)", "textfield.cs: TextFieldLeftView ()", TextFieldLeftView ()),
		};

		TableView.DataSource = new DataSource (this);
		TableView.Delegate = new TableDelegate ();
		Editing = false;
	}
}