Mercurial > pub > ImplabNet
diff Implab.Fx/ControlHelpers.cs @ 3:1e9583086e99
Added Impl.Fx
author | cin |
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date | Fri, 13 Sep 2013 12:54:28 +0400 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Implab.Fx/ControlHelpers.cs Fri Sep 13 12:54:28 2013 +0400 @@ -0,0 +1,56 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Text; +using System.Windows.Forms; + +namespace Implab.Fx +{ + public static class ControlHelpers + { + /// <summary> + /// Переключает обработку обещания в поток указанного элемента управления. + /// </summary> + /// <typeparam name="T">Тип результата обещания</typeparam> + /// <param name="that">Исходное обещание</param> + /// <param name="ctl">Элемент управления</param> + /// <returns>Новое обещание, обработчики которого будут выполнены в потоке элемента управления.</returns> + /// <exception cref="ArgumentNullException">Параметр не может быть <c>null</c>.</exception> + /// <example> + /// client + /// .Get("description.txt") // returns a promise + /// .DirectToControl(m_ctl) // handle the promise in the thread of the control + /// .Then( + /// description => m_ctl.Text = description // now it's safe + /// ) + /// </example> + public static Promise<T> DirectToControl<T>(this Promise<T> that, Control ctl) + { + if (that == null) + throw new ArgumentNullException("that"); + if (ctl == null) + throw new ArgumentNullException("ctl"); + + var directed = new Promise<T>(); + + that.Then( + res => + { + if (ctl.InvokeRequired) + ctl.Invoke(new Action<T>(directed.Resolve),res); + else + directed.Resolve(res); + }, + err => + { + if (ctl.InvokeRequired) + ctl.Invoke(new Action<Exception>(directed.Reject), err); + else + directed.Reject(err); + } + ); + + return directed; + } + } +}