CustomNavButton

CustomNavButton.cs

using System;
using System.Drawing;
using MonoTouch.CoreGraphics;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MonoTouch.ObjCRuntime;

namespace SWVCVB
{
	public class CustomNavBarButton : UIButton 
	{
		private const float MAX_WIDTH = 160.0f;
		private const int CapWidth = 7;
		UIImage buttonImage;
		UIImage selectedImage;
		string buttonTitle = "";
		
		
		public event NSAction Tapped;
		
		public CustomNavBarButton(UIImage ButtonImage)
		{
			buttonImage = ButtonImage.StretchableImage(CapWidth,0);	
			PrepareButton();
		}
		
		public CustomNavBarButton(UIImage ButtonImage, string ButtonTitle)
		{
			buttonImage = ButtonImage.StretchableImage(CapWidth,0);
			buttonTitle = ButtonTitle;
			PrepareButton();
		}
		
		public CustomNavBarButton(UIImage ButtonImage, string ButtonTitle, NSAction tapped)
		{
			buttonImage = ButtonImage.StretchableImage(CapWidth,0);
			buttonTitle = ButtonTitle;
			if (tapped != null){
				Tapped += tapped;
			}
			if (!string.IsNullOrEmpty (ButtonTitle)) {
				PrepareButton();
			}
			else {
				PrepareButtonNoText();
			}
			
		}

		public CustomNavBarButton(UIImage ButtonImage, UIImage SelectedImage, NSAction tapped)
		{
			buttonImage = ButtonImage; //.StretchableImage(CapWidth,0);
			selectedImage = SelectedImage;
			
			if (tapped != null){
				Tapped += tapped;
			}
			
			PrepareButtonNoText();
			
			
		}
		
		public void SetText(string buttonTitle)
		{
			NSString bt;
			if (!string.IsNullOrEmpty(buttonTitle)) {
				SetTitle(buttonTitle, UIControlState.Normal);	
				bt = new NSString(buttonTitle);
			}
			else {
				SetTitle("", UIControlState.Normal);
				bt = new NSString("");
			}
			SizeF textSize = bt.StringSize(TitleLabel.Font);
			
			if ((textSize.Width + (CapWidth * 1.5)) > MAX_WIDTH){
				Frame = new RectangleF(Frame.X, Frame.Y, MAX_WIDTH,Frame.Size.Height);	
			}
			else {
				Frame = new RectangleF(Frame.X,Frame.Y,textSize.Width + (CapWidth * 1.5f), Frame.Size.Height);
			}
			
		}
		
		private void PrepareButton()
		{
			//= UIButton.FromType(UIButtonType.Custom);
			TitleLabel.Font = UIFont.SystemFontOfSize(UIFont.SmallSystemFontSize);
			TitleLabel.TextColor = UIColor.White;
			TitleLabel.ShadowColor = UIColor.DarkGray;
			TitleLabel.ShadowOffset = new SizeF(0,-1);
			TitleLabel.LineBreakMode = UILineBreakMode.TailTruncation;
			TitleEdgeInsets = new UIEdgeInsets(0f,6.0f,0f,3.0f);
			Frame = new RectangleF(0,0,0,buttonImage.Size.Height);
			
			SetText(buttonTitle);
			
			SetBackgroundImage (buttonImage, UIControlState.Normal);
			
			if (Tapped != null){
				TouchUpInside += delegate(object sender, EventArgs e) {
					Tapped();
				};
			}
			
		}
		
		private void PrepareButtonNoText()
		{
			//= UIButton.FromType(UIButtonType.Custom);
			//TitleLabel.Font = UIFont.SystemFontOfSize(UIFont.SmallSystemFontSize);
			//TitleLabel.TextColor = UIColor.White;
			//TitleLabel.ShadowColor = UIColor.DarkGray;
			//TitleLabel.ShadowOffset = new SizeF(0,-1);
			//TitleLabel.LineBreakMode = UILineBreakMode.TailTruncation;
			//TitleEdgeInsets = new UIEdgeInsets(0f,6.0f,0f,3.0f);
			
			Frame = new RectangleF(0,0,buttonImage.Size.Width,buttonImage.Size.Height);
			
			//SetText(buttonTitle);
			
			SetBackgroundImage (buttonImage, UIControlState.Normal);
			SetBackgroundImage(selectedImage, UIControlState.Selected);
			
			if (Tapped != null){
				TouchUpInside += delegate(object sender, EventArgs e) {
					Tapped();
				};
			}
			
		}
	}
}