74 lines
2.0 KiB
C#
74 lines
2.0 KiB
C#
// Authors:
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// Martin Baulig (martin.baulig@xamarin.com)
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//
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// Copyright 2012 Xamarin Inc. (http://www.xamarin.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if NET_4_5
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using System.Threading;
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namespace System {
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[MonoTODO ("Use SynchronizationContext / ThreadPool.")]
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public class Progress<T> : IProgress<T> {
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Action<T> handler;
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SynchronizationContext ctx;
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public Progress ()
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{
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ctx = SynchronizationContext.Current;
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}
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public Progress (Action<T> handler)
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{
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this.handler = handler;
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ctx = SynchronizationContext.Current;
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}
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void Invoke (Action action)
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{
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if (ctx != null)
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ctx.Post (_ => action (), null);
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else
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ThreadPool.QueueUserWorkItem (_ => action ());
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}
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protected virtual void OnReport (T value)
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{
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Invoke (() => {
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if (handler != null)
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handler (value);
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if (ProgressChanged != null)
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ProgressChanged (this, value);
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});
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}
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void IProgress<T>.Report (T value)
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{
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OnReport (value);
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}
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public event EventHandler<T> ProgressChanged;
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}
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}
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#endif
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