1 files changed, 170 insertions, 0 deletions
diff --git a/source/ShiftUI/Internal/Timer.cs b/source/ShiftUI/Internal/Timer.cs
new file mode 100644
index 0000000..e51c40d
--- /dev/null
+++ b/source/ShiftUI/Internal/Timer.cs
@@ -0,0 +1,170 @@
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+// Copyright (c) 2004 Novell, Inc.
+//
+// Authors:
+//	Jackson Harper ([email protected])
+
+
+using System;
+using System.Threading;
+using System.ComponentModel;
+
+namespace ShiftUI {
+	[DefaultProperty("Interval")]
+	[DefaultEvent("Tick")]
+	[ToolboxItemFilter("ShiftUI", ToolboxItemFilterType.Allow)]
+	public class Timer : Component {
+
+		private bool enabled;
+		private int interval = 100;
+		private DateTime expires;
+		internal Thread thread;
+		internal bool Busy;
+		internal IntPtr window;
+		object Widget_tag;
+
+		internal static readonly int Minimum = 15;
+
+		public Timer ()
+		{
+			enabled = false;
+		}
+
+		public Timer (IContainer container) : this ()
+		{
+			container.Add (this);
+		}
+
+		[DefaultValue (false)]
+		public virtual bool Enabled {
+			get {
+				return enabled;
+			}
+			set {
+				if (value != enabled) {
+					enabled = value;
+					if (value) {
+						// Use AddTicks so we get some rounding
+						expires = DateTime.UtcNow.AddMilliseconds (interval > Minimum ? interval : Minimum);
+
+						thread = Thread.CurrentThread;
+						XplatUI.SetTimer (this);
+					} else {
+						XplatUI.KillTimer (this);
+						thread = null;
+					}
+				}
+			}
+		}
+
+		[DefaultValue (100)]
+		public int Interval {
+			get {
+				return interval;
+			}
+			set {
+				if (value <= 0)
+					throw new ArgumentOutOfRangeException ("Interval", string.Format ("'{0}' is not a valid value for Interval. Interval must be greater than 0.", value));
+
+				if (interval == value) {
+					return;
+				}
+				
+				interval = value;
+								
+				// Use AddTicks so we get some rounding
+				expires = DateTime.UtcNow.AddMilliseconds (interval > Minimum ? interval : Minimum);
+									
+				if (enabled == true) {				
+					XplatUI.KillTimer (this);
+					XplatUI.SetTimer (this);
+				}
+			}
+		}
+		
+		[Localizable(false)]
+		[Bindable(true)]
+		[TypeConverter(typeof(StringConverter))]
+		[DefaultValue(null)]
+		[MWFCategory("Data")]
+		public object Tag {
+			get {
+				return Widget_tag;
+			}
+
+			set {
+				Widget_tag = value;
+			}
+		}
+
+		public void Start ()
+		{
+			Enabled = true;
+		}
+
+		public void Stop ()
+		{
+			Enabled = false;
+		}
+
+		internal DateTime Expires {
+			get {
+				return expires;
+			}
+		}
+
+		public event EventHandler Tick;
+
+		public override string ToString ()
+		{
+			return base.ToString () + ", Interval: " + Interval;
+		}
+
+		internal void Update (DateTime update)
+		{
+			expires = update.AddMilliseconds (interval > Minimum ? interval : Minimum);
+		}
+
+		internal void FireTick ()
+		{
+			OnTick (EventArgs.Empty);
+		}
+
+
+		protected virtual void OnTick (EventArgs e)
+		{
+			if (Tick != null)
+				Tick (this, e);
+		}
+
+		protected override void Dispose (bool disposing)
+		{
+			base.Dispose (disposing);
+			Enabled = false;
+		}
+
+		internal void TickHandler (object sender, EventArgs e)
+		{
+			OnTick (e);
+		}
+	}
+}
+