wpf动画同步闪烁 

 1    public class BlinkAnimation : Animatable
 2     {
 3         /// <summary>
 4         /// 单例，保持所有闪烁的动画同步
 5         /// </summary>
 6         public static readonly BlinkAnimation Instance = new BlinkAnimation();
 7 
 8         public double BlinkOpacity
 9         {
10             get { return (double)GetValue(BlinkOpacityProperty); }
11             set { SetValue(BlinkOpacityProperty, value); }
12         }
13 
14         // Using a DependencyProperty as the backing store for BlinkOpacity.  This enables animation, styling, binding, etc...
15         public static readonly DependencyProperty BlinkOpacityProperty =
16             DependencyProperty.Register("BlinkOpacity", typeof(double), typeof(BlinkAnimation), new PropertyMetadata(0.0));
17 
18 
19 
20         /// <summary>
21         /// 闪烁动画，用于动画同步
22         /// </summary>
23         public BlinkAnimation()
24         {
25             try
26             {
27                 DoubleAnimationUsingKeyFrames doubleAnimation = new DoubleAnimationUsingKeyFrames
28                 {
29                     RepeatBehavior = RepeatBehavior.Forever,
30                     Duration = TimeSpan.FromSeconds(1.5)
31                 };
32 
33                 DiscreteDoubleKeyFrame ddkf1 = new DiscreteDoubleKeyFrame(0.0, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0)));
34                 DiscreteDoubleKeyFrame ddkf2 = new DiscreteDoubleKeyFrame(1.0, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0.75)));
35 
36                 doubleAnimation.KeyFrames.Add(ddkf1);
37                 doubleAnimation.KeyFrames.Add(ddkf2);
38 
39                 if (BlinkOpacityProperty!=null)
40                 {
41                      BeginAnimation(BlinkOpacityProperty, doubleAnimation);
42                 } 
43             }
44             catch (Exception)
45             {
46                 // ignored
47             }
48         }
49 
50         protected override Freezable CreateInstanceCore()
51         {
52             return Instance;
53         }
54     }

 

 

使用方法：

1   <!--闪烁动画同步控制类-->
2             <ObjectDataProvider x:Key="BlinkerOdp"
3                                 ObjectType="{x:Type animation:BlinkAnimation}" />
1   <Rectangle Fill="White"
2                                                                DataContext="{StaticResource BlinkerOdp}"
3                                                                Opacity="{Binding BlinkOpacity}"
4                                                                x:Name="rect"
5                                                                Visibility="Collapsed" />

 

效果图：

 

源码下载：

https://files.cnblogs.com/files/congqiandehoulai/2021-08-31-wpf%E5%8A%A8%E7%94%BB%E5%90%8C%E6%AD%A5%E9%97%AA%E7%83%81.rar

 

感谢阅读

posted @ 2018-01-25 16:52  灰主流  阅读(970)  评论(2)  编辑  收藏  举报