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annotate MetroWpf/MetroWpf.Xaml/Transitions/StoryboardTransition.cs @ 121:8f94475d3146 tip

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final code
author stevenh7776
date Thu, 31 May 2012 15:35:26 +0100
parents a8b50a087544
children
rev   line source
24
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1 using System.Windows;
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2 using System.Windows.Controls;
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3 using System.Windows.Media.Animation;
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4
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5 namespace MetroWpf.Xaml.Transitions
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6 {
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7 // Transition with storyboards for the old and new content presenters
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8 [StyleTypedProperty(Property = "OldContentStyle", StyleTargetType = typeof(ContentPresenter))]
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9 [StyleTypedProperty(Property = "NewContentStyle", StyleTargetType = typeof(ContentPresenter))]
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10 public class StoryboardTransition : Transition
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11 {
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12 public Style OldContentStyle
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13 {
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14 get { return (Style)GetValue(OldContentStyleProperty); }
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15 set { SetValue(OldContentStyleProperty, value); }
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16 }
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17
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18 public static readonly DependencyProperty OldContentStyleProperty =
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19 DependencyProperty.Register("OldContentStyle",
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20 typeof(Style),
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21 typeof(StoryboardTransition),
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22 new UIPropertyMetadata(null));
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23
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24 public Storyboard OldContentStoryboard
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25 {
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26 get { return (Storyboard)GetValue(OldContentStoryboardProperty); }
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27 set { SetValue(OldContentStoryboardProperty, value); }
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28 }
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29
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30 public static readonly DependencyProperty OldContentStoryboardProperty =
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31 DependencyProperty.Register("OldContentStoryboard",
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32 typeof(Storyboard),
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33 typeof(StoryboardTransition),
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34 new UIPropertyMetadata(null));
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35
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36 public Style NewContentStyle
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37 {
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38 get { return (Style)GetValue(NewContentStyleProperty); }
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39 set { SetValue(NewContentStyleProperty, value); }
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40 }
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41
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42 public static readonly DependencyProperty NewContentStyleProperty =
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43 DependencyProperty.Register("NewContentStyle",
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44 typeof(Style),
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45 typeof(StoryboardTransition),
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46 new UIPropertyMetadata(null));
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47
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48 public Storyboard NewContentStoryboard
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49 {
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50 get { return (Storyboard)GetValue(NewContentStoryboardProperty); }
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51 set { SetValue(NewContentStoryboardProperty, value); }
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52 }
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53
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54 public static readonly DependencyProperty NewContentStoryboardProperty =
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55 DependencyProperty.Register("NewContentStoryboard",
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56 typeof(Storyboard),
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57 typeof(StoryboardTransition),
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58 new UIPropertyMetadata(null));
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59
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60 protected internal override void BeginTransition(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
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61 {
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62 Storyboard oldStoryboard = OldContentStoryboard;
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63 Storyboard newStoryboard = NewContentStoryboard;
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64
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65 if (oldStoryboard != null || newStoryboard != null)
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66 {
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67 oldContent.Style = OldContentStyle;
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68 newContent.Style = NewContentStyle;
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69
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70 // Flag to determine when both storyboards are done
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71 bool done = oldStoryboard == null || newStoryboard == null;
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72
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73 if (oldStoryboard != null)
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74 {
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75 oldStoryboard = oldStoryboard.Clone();
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76 oldContent.SetValue(OldContentStoryboardProperty, oldStoryboard);
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77 oldStoryboard.Completed += delegate
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78 {
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79 if (done)
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80 EndTransition(transitionElement, oldContent, newContent);
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81 done = true;
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82 };
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83 oldStoryboard.Begin(oldContent, true);
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84 }
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85
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86 if (newStoryboard != null)
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87 {
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88 newStoryboard = newStoryboard.Clone();
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89 newContent.SetValue(NewContentStoryboardProperty, newStoryboard);
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90 newStoryboard.Completed += delegate
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91 {
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92 if (done)
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93 EndTransition(transitionElement, oldContent, newContent);
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94 done = true;
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95 };
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96 newStoryboard.Begin(newContent, true);
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97 }
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98 }
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99 else
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100 {
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101 EndTransition(transitionElement, oldContent, newContent);
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102 }
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103 }
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104
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105 protected override void OnTransitionEnded(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
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106 {
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107 Storyboard oldStoryboard = (Storyboard)oldContent.GetValue(OldContentStoryboardProperty);
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108 if (oldStoryboard != null)
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109 oldStoryboard.Stop(oldContent);
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110 oldContent.ClearValue(ContentPresenter.StyleProperty);
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111
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112 Storyboard newStoryboard = (Storyboard)newContent.GetValue(NewContentStoryboardProperty);
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113 if (newStoryboard != null)
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114 newStoryboard.Stop(newContent);
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115 newContent.ClearValue(ContentPresenter.StyleProperty);
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116 }
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117 }
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118 }