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annotate Chronosv2/source/Extensions/Windows/FrameworkElementExtensions.cs @ 19:09d18d6e5f40

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airport work
author stevenh7776 stevenhollidge@hotmail.com
date Thu, 15 Mar 2012 06:59:15 +0000
parents 443821e55f06
children
rev   line source
19
09d18d6e5f40 airport work
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1 using System;
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2 using System.Threading;
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3 using System.Windows;
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4 using System.Windows.Input;
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5 using System.Windows.Threading;
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6
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7 namespace Chronos.Extensions.Windows
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8 {
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9 public static class FrameworkElementExtensions
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10 {
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11 /// <summary>
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12 /// Set focus to UIElement
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13 /// </summary>
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14 /// <param name="element">The element to set focus on</param>
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15 public static void SetFocus(this FrameworkElement element)
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16 {
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17 //Focus in a callback to run on another thread, ensuring the main
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18 //UI thread is initialized by the time focus is set
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19 ThreadPool.QueueUserWorkItem
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20 (
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21 delegate(object theElement)
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22 {
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23 FrameworkElement elem = (FrameworkElement)theElement;
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24
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25 elem.InvokeAsynchronouslyInBackground
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26 (
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27 () =>
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28 {
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29 bool result = elem.Focus();
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30 Keyboard.Focus(elem);
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31 }
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32 );
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33 }, element
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34 );
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35 }
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36
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37 public static void MoveFocus(this IInputElement element, FocusNavigationDirection direction)
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38 {
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39 //Focus in a callback to run on another thread, ensuring the main
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40 //UI thread is initialized by the time focus is set
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41 ThreadPool.QueueUserWorkItem
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42 (
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43 delegate(object theElement)
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44 {
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45 FrameworkElement elem = (FrameworkElement)theElement;
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46
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47 elem.InvokeAsynchronouslyInBackground
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48 (
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49 () =>
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50 {
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51 elem.Focus();
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52 Keyboard.Focus(elem);
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53 elem.MoveFocus(new TraversalRequest(direction));
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54 }
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55 );
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56 }, element
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57 );
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58 }
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59 }
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60 }