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annotate MetroWpf/MetroWpf.Xaml/Converters/ThicknessToDoubleConverter.cs @ 121:8f94475d3146 tip

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final code
author stevenh7776
date Thu, 31 May 2012 15:35:26 +0100
parents 060f02cd4591
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15
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1 using System;
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2 using System.Globalization;
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3 using System.Windows;
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4 using System.Windows.Data;
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5
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6 namespace MetroWpf.Xaml.Converters
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7 {
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8 [ValueConversion(typeof(Thickness), typeof(double))]
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9 public sealed class ThicknessToDoubleConverter : IValueConverter
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10 {
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11 public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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12 {
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13 if (!(value is Thickness))
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14 {
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15 return DependencyProperty.UnsetValue;
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16 }
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17
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18 var thickness = (Thickness)value;
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19
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20 var propertyName = parameter as string;
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21 switch (propertyName)
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22 {
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23 case "Left":
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24 return thickness.Left;
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25 case "Top":
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26 return thickness.Top;
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27 case "Right":
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28 return thickness.Right;
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29 case "Bottom":
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30 return thickness.Bottom;
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31 default:
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32 return (thickness.Left + thickness.Top + thickness.Bottom + thickness.Right) / 4;
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33 }
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34 }
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35
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36 public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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37 {
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38 if (!(value is double))
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39 {
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40 return DependencyProperty.UnsetValue;
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41 }
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42
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43 var parameters = parameter as string;
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44 if (parameters != null)
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45 {
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46 var propertyNames = parameters.Split(new[] { ", " }, StringSplitOptions.RemoveEmptyEntries);
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47 if (propertyNames.Length > 0)
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48 {
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49 var thickness = new Thickness(0);
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50
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51 var changed = false;
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52
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53 foreach (var propertyName in propertyNames)
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54 {
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55 switch (propertyName)
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56 {
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57 case "Left":
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58 thickness.Left = (double)value;
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59 changed = true;
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60 break;
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61 case "Top":
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62 thickness.Top = (double)value;
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63 changed = true;
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64 break;
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65 case "Right":
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66 thickness.Right = (double)value;
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67 changed = true;
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68 break;
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69 case "Bottom":
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70 thickness.Bottom = (double)value;
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71 changed = true;
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72 break;
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73 }
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74 }
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75
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76 if (changed)
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77 {
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78 return thickness;
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79 }
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80 }
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81 }
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82
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83 return new Thickness((double)value);
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84 }
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85 }
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86 } ;