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annotate Chronosv2/source/Extensions/Windows/FrameworkElementExtensions.cs @ 13:87905693f506

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author stevenh7776 stevenhollidge@hotmail.com
date Tue, 21 Feb 2012 17:49:06 +0700
parents 443821e55f06
children 09d18d6e5f40
rev   line source
10
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1 /*
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2 The MIT License
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3
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4 Copyright (c) 2009-2010. Carlos Guzmán Álvarez. http://chronoswpf.codeplex.com/
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5
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6 Permission is hereby granted, free of charge, to any person obtaining a copy
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7 of this software and associated documentation files (the "Software"), to deal
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8 in the Software without restriction, including without limitation the rights
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9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 copies of the Software, and to permit persons to whom the Software is
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11 furnished to do so, subject to the following conditions:
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12
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13 The above copyright notice and this permission notice shall be included in
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14 all copies or substantial portions of the Software.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 THE SOFTWARE.
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23 */
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24
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25 using System;
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26 using System.Threading;
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27 using System.Windows;
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28 using System.Windows.Input;
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29 using System.Windows.Threading;
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30
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31 namespace Chronos.Extensions.Windows
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32 {
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33 public static class FrameworkElementExtensions
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34 {
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35 /// <summary>
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36 /// Set focus to UIElement
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37 /// </summary>
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38 /// <param name="element">The element to set focus on</param>
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39 public static void SetFocus(this FrameworkElement element)
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40 {
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41 //Focus in a callback to run on another thread, ensuring the main
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42 //UI thread is initialized by the time focus is set
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43 ThreadPool.QueueUserWorkItem
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44 (
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45 delegate(object theElement)
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46 {
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47 FrameworkElement elem = (FrameworkElement)theElement;
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48
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49 elem.InvokeAsynchronouslyInBackground
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50 (
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51 () =>
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52 {
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53 bool result = elem.Focus();
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54 Keyboard.Focus(elem);
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55 }
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56 );
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57 }, element
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58 );
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59 }
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60
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61 public static void MoveFocus(this IInputElement element, FocusNavigationDirection direction)
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62 {
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63 //Focus in a callback to run on another thread, ensuring the main
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64 //UI thread is initialized by the time focus is set
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65 ThreadPool.QueueUserWorkItem
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66 (
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67 delegate(object theElement)
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68 {
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69 FrameworkElement elem = (FrameworkElement)theElement;
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70
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71 elem.InvokeAsynchronouslyInBackground
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72 (
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73 () =>
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74 {
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75 elem.Focus();
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76 Keyboard.Focus(elem);
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77 elem.MoveFocus(new TraversalRequest(direction));
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78 }
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79 );
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80 }, element
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81 );
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82 }
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83 }
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84 }