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annotate Chronosv2/source/Extensions/Windows/ApplicationExtensions.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
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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.Security.Permissions;
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26 using System.Windows;
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27 using System.Windows.Threading;
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28 using System.Windows.Media;
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29
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30 namespace Chronos.Extensions.Windows
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31 {
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32 /// <summary>
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33 /// Application extensions
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34 /// </summary>
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35 public static class ApplicationExtensions
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36 {
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37 #region · Extension Methods ·
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38
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39 public static RenderTier GetRenderTier(this Application application)
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40 {
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41 return (RenderTier)(RenderCapability.Tier / 0x10000);
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42 }
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43
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44 /// <summary>
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45 /// Forces the WPF message pump to process all enqueued messages
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46 /// that are above the input parameter DispatcherPriority.
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47 /// </summary>
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48 /// <param name="priority">The DispatcherPriority to use
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49 /// as the lowest level of messages to get processed</param>
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50 [SecurityPermissionAttribute(SecurityAction.Demand,
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51 Flags = SecurityPermissionFlag.UnmanagedCode)]
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52 public static void DoEvents(this Application application, DispatcherPriority priority)
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53 {
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54 DispatcherFrame frame = new DispatcherFrame();
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55 DispatcherOperation dispatcherOperation =
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56 Dispatcher.CurrentDispatcher.BeginInvoke(priority,
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57 new DispatcherOperationCallback(ExitFrameOperation), frame);
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58
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59 Dispatcher.PushFrame(frame);
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60
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61 if (dispatcherOperation.Status != DispatcherOperationStatus.Completed)
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62 {
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63 dispatcherOperation.Abort();
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64 }
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65 }
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66
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67 /// <summary>
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68 /// Forces the WPF message pump to process all enqueued messages
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69 /// that are DispatcherPriority.Background or above
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70 /// </summary>
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71 [SecurityPermissionAttribute(SecurityAction.Demand,
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72 Flags = SecurityPermissionFlag.UnmanagedCode)]
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73 public static void DoEvents(this Application application)
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74 {
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75 application.DoEvents(DispatcherPriority.Background);
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76 }
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77
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78 /// <summary>
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79 /// Stops the dispatcher from continuing
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80 /// </summary>
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81 private static object ExitFrameOperation(object obj)
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82 {
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83 ((DispatcherFrame)obj).Continue = false;
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84
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85 return null;
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86 }
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87
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88 #endregion
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89 }
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90 }