Mercurial > silverbladetech

annotate Chronosv2/source/Extensions/Windows/UIElementExtensions.cs @ 25:81f9b72a44ce

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Tidy up
author adminsh@apollo
date Tue, 20 Mar 2012 21:22:00 +0000
parents 09d18d6e5f40
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rev   line source
19
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1 using System.Windows;
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2 using System.Windows.Media;
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3 using System.Windows.Media.Imaging;
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4
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5 namespace Chronos.Extensions.Windows
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6 {
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7 /// <summary>
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8 /// Extension methods for the System.Windows.UIElement class
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9 /// </summary>
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10 public static class UIElementExtensions
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11 {
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12 #region · Extensions ·
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13
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14 /// <summary>
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15 /// Gets the parent of an <see cref="UIElement"/>.
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16 /// </summary>
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17 /// <typeparam name="T"></typeparam>
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18 /// <param name="element">The element.</param>
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19 /// <returns></returns>
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20 public static T GetParent<T>(this UIElement element) where T : UIElement
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21 {
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22 // Walk the VisualTree to obtain the DesktopItem of the DragThumb
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23 DependencyObject parent = VisualTreeHelper.GetParent(element);
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24
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25 while (parent != null && !(parent is T))
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26 {
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27 parent = VisualTreeHelper.GetParent(parent);
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28 }
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29
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30 return parent as T;
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31 }
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32
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33 /// <summary>
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34 /// Renders the ui element into a bitmap frame.
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35 /// </summary>
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36 /// <param name="element">The UI element.</param>
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37 /// <returns>The created bitmap frame</returns>
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38 public static BitmapSource RenderToBitmap(this UIElement element)
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39 {
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40 return element.RenderToBitmap(1);
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41 }
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42
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43 /// <summary>
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44 /// Renders the ui element into a bitmap frame using the specified scale.
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45 /// </summary>
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46 /// <param name="element">The UI element.</param>
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47 /// <param name="scale">The scale (default: 1).</param>
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48 /// <returns>The created bitmap frame</returns>
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49 public static BitmapSource RenderToBitmap(this UIElement element, double scale)
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50 {
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51 var renderWidth = (int)(element.RenderSize.Width * scale);
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52 var renderHeight = (int)(element.RenderSize.Height * scale);
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53
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54 var renderTarget = new RenderTargetBitmap(renderWidth, renderHeight, 96, 96, PixelFormats.Pbgra32);
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55 var sourceBrush = new VisualBrush(element);
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56
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57 var drawingVisual = new DrawingVisual();
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58 var drawingContext = drawingVisual.RenderOpen();
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59
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60 using (drawingContext)
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61 {
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62 drawingContext.PushTransform(new ScaleTransform(scale, scale));
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63 drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(element.RenderSize.Width, element.RenderSize.Height)));
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64 }
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65
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66 renderTarget.Render(drawingVisual);
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67
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68 return renderTarget;
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69 }
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70
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71 #endregion
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72 }
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73 }