原文:
WPF用Blend写的交通信号灯
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用Blend写WPF界面和Behavior特别方便，下面是我写的一个交通信号灯，用Blend写完后代码直接Copy到wpf窗体就可以了。
1.打开Blend做一个矩形和三个圆形，然后分别填充颜色，把矩形的四角编程圆角；
2.添加时间动画并设置动画循环显示：
3.xaml代码如下：
<Window x:Class="wpf红绿灯.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="106.879" Width="218.457">
<Window.Resources>
<Storyboard x:Key="Storyboard1" AutoReverse="True" RepeatBehavior="Forever">
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="ellipse1">
<EasingColorKeyFrame KeyTime="0:0:0.4" Value="sc#1, 0.004391442, 0.004024717, 0.004024717"/>
<EasingColorKeyFrame KeyTime="0:0:0.9" Value="#FFF9FF00"/>
<EasingColorKeyFrame KeyTime="0:0:1.5" Value="sc#1, 0.004391442, 0.004024717, 0.004024717"/>
</ColorAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="ellipse2">
<EasingColorKeyFrame KeyTime="0:0:0.4" Value="#FF1B1C1B"/>
<EasingColorKeyFrame KeyTime="0:0:0.9" Value="#FF0F0E0E"/>
<EasingColorKeyFrame KeyTime="0:0:2" Value="#FF1DFF00"/>
</ColorAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="ellipse">
<EasingColorKeyFrame KeyTime="0:0:0.9" Value="#FF0F0E0E"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded">
<BeginStoryboard Storyboard="{StaticResource Storyboard1}"/>
</EventTrigger>
</Window.Triggers>
<Grid x:Name="grid">
<Rectangle Fill="#FF0063FF" HorizontalAlignment="Left" Height="65" Margin="6,6,0,0" Stroke="Black" VerticalAlignment="Top" Width="202" RadiusY="13.394" RadiusX="13.394"/>
<Ellipse x:Name="ellipse" Fill="#FFFF0006" HorizontalAlignment="Left" Height="57" Margin="11,10,0,0" Stroke="Black" VerticalAlignment="Top" Width="56"/>
<Ellipse x:Name="ellipse1" Fill="#FF070707" HorizontalAlignment="Left" Height="57" Margin="77,10,0,0" Stroke="Black" VerticalAlignment="Top" Width="56"/>
<Ellipse x:Name="ellipse2" Fill="#FF101111" HorizontalAlignment="Left" Height="57" Margin="145,10,0,0" Stroke="Black" VerticalAlignment="Top" Width="56"/>
</Grid>
</Window>
4.最后效果如图：
下面这个是竖着的效果图：
