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annotate MetroWpf/MetroWpf.Xaml/Adorners/NotesAdorner.cs @ 15:060f02cd4591

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author stevenh7776 stevenhollidge@hotmail.com
date Mon, 12 Mar 2012 23:05:21 +0800
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15
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1 using System.Globalization;
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2 using System.Windows;
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3 using System.Windows.Documents;
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4 using System.Windows.Media;
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5 using MetroWpf.Xaml.Styles;
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6
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7 namespace MetroWpf.Xaml.Adorners
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8 {
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9 public class NotesAdorner : Adorner
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10 {
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11 public NotesAdorner(UIElement adornedElement)
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12 : base(adornedElement)
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13 {
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14 NoteBrush = new SolidColorBrush(AccentColors.Black);
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15 NoteWidth = 70;
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16 NoteHeight = 30;
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17
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18 TextBrush = new SolidColorBrush(AccentColors.White);
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19 Text = "Adorner!";
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20 TextTypeface = new Typeface("Segoe UI");
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21 }
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22
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23 public SolidColorBrush NoteBrush { get; set; }
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24 public double NoteWidth { get; set; }
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25 public double NoteHeight { get; set; }
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26
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27 public SolidColorBrush TextBrush { get; set; }
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28 public string Text { get; set; }
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29 public Typeface TextTypeface { get; set; }
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30
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31 protected override void OnRender(DrawingContext drawingContext)
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32 {
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33 Rect adornedElementRect =
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34 new Rect(this.AdornedElement.DesiredSize);
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35
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36 var noteContainer =
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37 DrawContainer(drawingContext, adornedElementRect);
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38
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39 DrawMessageText(
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40 drawingContext,
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41 noteContainer.Left,
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42 noteContainer.Top);
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43 }
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44
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45 private Rect DrawContainer(
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46 DrawingContext drawingContext,
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47 Rect adornedElementRect)
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48 {
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49 // border and fill color
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50 SolidColorBrush renderBrush = NoteBrush;
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51 renderBrush.Opacity = 0.2;
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52 Pen renderPen = new Pen(NoteBrush, 1.5);
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53
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54 // location and sizing
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55 double xOffset = 20;
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56 double yOffset = 0;
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57 double renderRadius = 5.0;
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58
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59 Point topLeftPosition = new Point(
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60 adornedElementRect.Right + xOffset,
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61 adornedElementRect.Top + yOffset);
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62
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63 Point bottomRightPosition = new Point(
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64 adornedElementRect.Right + xOffset + NoteWidth,
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65 adornedElementRect.Top + NoteHeight);
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66
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67 Rect noteContainer = new Rect(
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68 topLeftPosition,
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69 bottomRightPosition);
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70
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71 //Add to visual tree (should we add to logical tree as well?)
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72 drawingContext.DrawRoundedRectangle(
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73 renderBrush,
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74 renderPen,
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75 noteContainer,
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76 renderRadius,
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77 renderRadius);
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78
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79 return noteContainer;
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80 }
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81
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82 private void DrawMessageText(
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83 DrawingContext drawingContext,
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84 double left,
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85 double top)
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86 {
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87 FormattedText formattedText = new FormattedText(
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88 Text,
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89 CultureInfo.InvariantCulture,
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90 FlowDirection.LeftToRight,
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91 TextTypeface,
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92 12,
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93 TextBrush);
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94
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95 Point topLeftPosition = new Point(
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96 left + 8,
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97 top + 4);
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98
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99 drawingContext.DrawText(
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100 formattedText,
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101 topLeftPosition);
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102 }
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103 }
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104 }