NotificationBar

NotificationBar

using System;
using ClanceysLib;
using MonoTouch.UIKit;
using MonoTouch.Foundation;
using System.Threading;
using MonoTouch.ObjCRuntime;
using System.Drawing;
using MonoTouch.CoreGraphics;
using System.Linq;
namespace Collaborate
{
	public static class NotificationBar
	{
		private static UIToolbar theView;
		private static NSObject notificationObserver;
		private static bool isVisible;
		private static bool isShown;
		private static float height = 50;
		private static UIButton closeButton;
		private static UIButton messageLabel;
		private static myDelegate Delegate = new myDelegate();
		
		private class myDelegate : NSObject
		{
			[Export("fadeInDidFinish")]
			public void FadeInDidFinish ()
			{		
				isShown = true;
				Thread thread = new Thread(NotificationBar.startCountdown);
				thread.Start();
			}
			
			[Export("fadeOutDidFinish")]
			public void FadeOutDidFinish ()
			{	
				NotificationBar.EnsureInvokedOnMainThread(delegate {
					NotificationBar.theView.RemoveFromSuperview();
				});
				NotificationBar.isShown = false;
				NotificationBar.isVisible = false;
			}
		
		}
		static NotificationBar()
		{
			var frame = UIScreen.MainScreen.Bounds;
			startLocation = new PointF(0,frame.Height);
			theView = new UIToolbar(new RectangleF(startLocation,new SizeF(frame.Width,height)));
			theView.TintColor = Theme.NavigationTint;
			messageLabel = new UIButton(new RectangleF(5,0,theView.Frame.Width - 10,theView.Frame.Height));
			messageLabel.SetTitleColor(UIColor.White,UIControlState.Normal);
			messageLabel.BackgroundColor = UIColor.Clear;
			
			theView.AddSubview(messageLabel);
			closeButton = new UIButton(new RectangleF(new PointF(5,-Images.closeBoxImage.Size.Height / 2),Images.closeBoxImage.Size));
			closeButton.SetImage(Images.closeBoxImage,UIControlState.Normal);
			closeButton.TouchDown += delegate {
				hide();
			};
			theView.AddSubview(closeButton);
			//theView.Alpha = 0.9f;
			
			notificationObserver  = NSNotificationCenter.DefaultCenter
					.AddObserver("UIDeviceOrientationDidChangeNotification", DeviceRotated );
		}
		private static UIDeviceOrientation lastOrientation = UIDeviceOrientation.Unknown;
		private static void DeviceRotated(NSNotification notification){
			if(lastOrientation == UIDevice.CurrentDevice.Orientation)
				return;
			if(UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.FaceDown ||
					UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.FaceUp ||
					UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.Unknown)
				lastOrientation = lastOrientation == UIDeviceOrientation.Unknown ? UIDeviceOrientation.Portrait : lastOrientation;
			else
				lastOrientation = UIDevice.CurrentDevice.Orientation;
			
			
			Console.WriteLine("rotated! " + lastOrientation);
			EnsureInvokedOnMainThread(delegate{
				var bounds = UIApplication.SharedApplication.KeyWindow.Bounds;
				switch (lastOrientation){
	
					case  UIDeviceOrientation.Portrait:
					case UIDeviceOrientation.PortraitUpsideDown:
						setFrame(bounds.Width,bounds.Height,false);
						break;
					case UIDeviceOrientation.LandscapeLeft:
					case UIDeviceOrientation.LandscapeRight:
						setFrame(bounds.Height,bounds.Width,true);
						break;
				}
			});
			
		}
		private static PointF startLocation;
		private static void setFrame(float width, float theHeight, bool transform)
		{
			SizeF size = new SizeF(width,height);
			
			startLocation = PointF.Empty;
			
			startLocation = new PointF(0, theHeight);
			theView.Frame = theView.Frame.SetSize(size);
			messageLabel.Frame = messageLabel.Frame.SetSize(theView.Frame.Size.Subtract(new SizeF(10,0)));
			theView.RemoveFromSuperview();
			if(isVisible)
			{
				Thread thread = new Thread(reshow);
				thread.Start();
			}
			
			isVisible = false;
			isShown = false;
		}
		
		static void reshow()
		{
			Thread.Sleep(500);
			theView.BeginInvokeOnMainThread(delegate {
				startShow();
			});
		}
		
		static float DegreesToRadians (int deg)
		{
			return (float)(deg * Math.PI / 180.0);
		}
				
		public static void Show(string message)
		{
			if(isVisible)
				return;
			
			messageLabel.SetTitle(message,UIControlState.Normal);
			//Console.WriteLine("showing message: " + message);
			isVisible = true;
			startedDate = DateTime.Now;
			EnsureInvokedOnMainThread( delegate {startShow();});
			
		}
		
		private static void startShow()
		{
			theView.Frame = theView.Frame.SetLocation(startLocation);
			Console.WriteLine("notification frame: " + theView.Frame);
			
			Util.MainWindow.Subviews.Last().AddSubview(theView);
			UIView.BeginAnimations ("showNotification");
			UIView.SetAnimationDuration (.3f);
			//UIView.SetAnimationCurve(UIViewAnimationCurve.EaseOut);
			UIView.SetAnimationDelegate (Delegate);
			theView.Frame = theView.Frame.SubtractLocation(0,height);
			UIView.SetAnimationDidStopSelector (new Selector ("fadeInDidFinish"));
			UIView.CommitAnimations ();
		}
		
		
		private static DateTime startedDate;
		private static void startCountdown()
		{
			while(startedDate > DateTime.Now.AddSeconds(-4))
			{
				
			}
			
			//Console.WriteLine("closing message");
			theView.BeginInvokeOnMainThread(delegate {
				if(isShown)
					hide();	
			});
		}
		
		private static void hide()
		{
			isShown = false;
			//UIApplication.SharedApplication.KeyWindow.Add(theView);
			UIView.BeginAnimations ("hideNotification");
			UIView.SetAnimationDuration (.3f);
			//UIView.SetAnimationCurve(UIViewAnimationCurve.EaseOut);
			UIView.SetAnimationDelegate (Delegate);
			theView.Frame = theView.Frame.AddLocation(0,height + 20);
			UIView.SetAnimationDidStopSelector (new Selector ("fadeOutDidFinish"));
			UIView.CommitAnimations ();
		}
		
		
		private static bool IsMainThread() {
			return Messaging.bool_objc_msgSend(GetClassHandle("NSThread"), new Selector("isMainThread").Handle);
		}
		private static IntPtr GetClassHandle (string clsName)
		{
			return (new Class(clsName)).Handle;
		}
		private static void EnsureInvokedOnMainThread (Action action)
		{
			if (IsMainThread ())
			{
				action ();
				return;
			}
			theView.BeginInvokeOnMainThread (() => action());
		}
	}
}