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comparison Implab.Fx/ControlHelpers.cs @ 3:1e9583086e99

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Added Impl.Fx
author cin
date Fri, 13 Sep 2013 12:54:28 +0400
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2:aa367305156b 3:1e9583086e99
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Windows.Forms;
6
7 namespace Implab.Fx
8 {
9 public static class ControlHelpers
10 {
11 /// <summary>
12 /// Переключает обработку обещания в поток указанного элемента управления.
13 /// </summary>
14 /// <typeparam name="T">Тип результата обещания</typeparam>
15 /// <param name="that">Исходное обещание</param>
16 /// <param name="ctl">Элемент управления</param>
17 /// <returns>Новое обещание, обработчики которого будут выполнены в потоке элемента управления.</returns>
18 /// <exception cref="ArgumentNullException">Параметр не может быть <c>null</c>.</exception>
19 /// <example>
20 /// client
21 /// .Get("description.txt") // returns a promise
22 /// .DirectToControl(m_ctl) // handle the promise in the thread of the control
23 /// .Then(
24 /// description => m_ctl.Text = description // now it's safe
25 /// )
26 /// </example>
27 public static Promise<T> DirectToControl<T>(this Promise<T> that, Control ctl)
28 {
29 if (that == null)
30 throw new ArgumentNullException("that");
31 if (ctl == null)
32 throw new ArgumentNullException("ctl");
33
34 var directed = new Promise<T>();
35
36 that.Then(
37 res =>
38 {
39 if (ctl.InvokeRequired)
40 ctl.Invoke(new Action<T>(directed.Resolve),res);
41 else
42 directed.Resolve(res);
43 },
44 err =>
45 {
46 if (ctl.InvokeRequired)
47 ctl.Invoke(new Action<Exception>(directed.Reject), err);
48 else
49 directed.Reject(err);
50 }
51 );
52
53 return directed;
54 }
55 }
56 }