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annotate Chronosv2/source/Extensions/Windows/UIElementExtensions.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.Windows;
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26 using System.Windows.Media;
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27 using System.Windows.Media.Imaging;
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28
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29 namespace Chronos.Extensions.Windows
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30 {
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31 /// <summary>
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32 /// Extension methods for the System.Windows.UIElement class
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33 /// </summary>
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34 public static class UIElementExtensions
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35 {
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36 #region · Extensions ·
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37
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38 /// <summary>
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39 /// Gets the parent of an <see cref="UIElement"/>.
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40 /// </summary>
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41 /// <typeparam name="T"></typeparam>
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42 /// <param name="element">The element.</param>
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43 /// <returns></returns>
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44 public static T GetParent<T>(this UIElement element) where T : UIElement
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45 {
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46 // Walk the VisualTree to obtain the DesktopItem of the DragThumb
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47 DependencyObject parent = VisualTreeHelper.GetParent(element);
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48
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49 while (parent != null && !(parent is T))
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50 {
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51 parent = VisualTreeHelper.GetParent(parent);
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52 }
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53
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54 return parent as T;
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55 }
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56
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57 /// <summary>
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58 /// Renders the ui element into a bitmap frame.
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59 /// </summary>
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60 /// <param name="element">The UI element.</param>
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61 /// <returns>The created bitmap frame</returns>
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62 public static BitmapSource RenderToBitmap(this UIElement element)
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63 {
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64 return element.RenderToBitmap(1);
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65 }
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66
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67 /// <summary>
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68 /// Renders the ui element into a bitmap frame using the specified scale.
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69 /// </summary>
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70 /// <param name="element">The UI element.</param>
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71 /// <param name="scale">The scale (default: 1).</param>
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72 /// <returns>The created bitmap frame</returns>
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73 public static BitmapSource RenderToBitmap(this UIElement element, double scale)
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74 {
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75 var renderWidth = (int)(element.RenderSize.Width * scale);
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76 var renderHeight = (int)(element.RenderSize.Height * scale);
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77
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78 var renderTarget = new RenderTargetBitmap(renderWidth, renderHeight, 96, 96, PixelFormats.Pbgra32);
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79 var sourceBrush = new VisualBrush(element);
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80
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81 var drawingVisual = new DrawingVisual();
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82 var drawingContext = drawingVisual.RenderOpen();
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83
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84 using (drawingContext)
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85 {
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86 drawingContext.PushTransform(new ScaleTransform(scale, scale));
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87 drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(element.RenderSize.Width, element.RenderSize.Height)));
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88 }
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89
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90 renderTarget.Render(drawingVisual);
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91
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92 return renderTarget;
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93 }
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94
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95 #endregion
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96 }
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97 }