Ответ 1
Использование MahApps.Metro
было бы намного проще, но ниже приведен простой индикатор ожидания Metro, показанный, как это будет сделано в XAML.
<Viewbox>
<Canvas Width="50" Height="50"
HorizontalAlignment="Left"
VerticalAlignment="Top">
<Path Data="M50,27.5 C50,24.23333 45,24.23333 45,27.5 C45,30.83333 50,30.83333 50,27.5"
Fill="#FFFFFFFF"
RenderTransformOrigin="0.5,0.83333">
<Path.RenderTransform >
<RotateTransform x:Name="_rot1" Angle="0"/>
</Path.RenderTransform>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="_rot1"
Storyboard.TargetProperty="Angle"
RepeatBehavior="Forever">
<EasingDoubleKeyFrame KeyTime="0:0:0" Value="360"/>
<EasingDoubleKeyFrame KeyTime="0:0:2" Value="0">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase Power="1.3" EasingMode="EaseInOut"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
<Path Data="M50,27.5 C50,24.23333 45,24.23333 45,27.5 C45,30.83333 50,30.83333 50,27.5"
Fill="#DDFFFFFF"
RenderTransformOrigin="0.5,0.83333">
<Path.RenderTransform>
<RotateTransform x:Name="_rot2" Angle="13"/>
</Path.RenderTransform>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="_rot2"
Storyboard.TargetProperty="Angle"
RepeatBehavior="Forever">
<EasingDoubleKeyFrame KeyTime="0:0:0" Value="13"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="13"/>
<EasingDoubleKeyFrame KeyTime="0:0:2.2" Value="-347">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase Power="1.3" EasingMode="EaseInOut"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="-347"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
<Path Data="M50,27.5 C50,24.23333 45,24.23333 45,27.5 C45,30.83333 50,30.83333 50,27.5"
Fill="#BBFFFFFF"
RenderTransformOrigin="0.5,0.83333">
<Path.RenderTransform>
<RotateTransform x:Name="_rot3" Angle="26"/>
</Path.RenderTransform>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="_rot3"
Storyboard.TargetProperty="Angle"
RepeatBehavior="Forever">
<EasingDoubleKeyFrame KeyTime="0:0:0" Value="26"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="26"/>
<EasingDoubleKeyFrame KeyTime="0:0:2.4" Value="-334">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase Power="1.3" EasingMode="EaseInOut"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="-334"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
<Path Data="M50,27.5 C50,24.23333 45,24.23333 45,27.5 C45,30.83333 50,30.83333 50,27.5"
Fill="#99FFFFFF"
RenderTransformOrigin="0.5,0.83333">
<Path.RenderTransform>
<RotateTransform x:Name="_rot4" Angle="39"/>
</Path.RenderTransform>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="_rot4"
Storyboard.TargetProperty="Angle"
RepeatBehavior="Forever">
<EasingDoubleKeyFrame KeyTime="0:0:0" Value="39"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.6" Value="39"/>
<EasingDoubleKeyFrame KeyTime="0:0:2.6" Value="-321">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase Power="1.3" EasingMode="EaseInOut"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="-321"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
<Path Data="M50,27.5 C50,24.23333 45,24.23333 45,27.5 C45,30.83333 50,30.83333 50,27.5"
Fill="#77FFFFFF"
RenderTransformOrigin="0.5,0.83333">
<Path.RenderTransform>
<RotateTransform x:Name="_rot5" Angle="52"/>
</Path.RenderTransform>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="_rot5"
Storyboard.TargetProperty="Angle"
RepeatBehavior="Forever">
<EasingDoubleKeyFrame KeyTime="0:0:0" Value="52"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.8" Value="52"/>
<EasingDoubleKeyFrame KeyTime="0:0:2.8" Value="-308">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase Power="1.3" EasingMode="EaseInOut"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="-308"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
</Canvas>
</Viewbox>
Это по существу тот же объект Path
, заполненный круг, используемый 5 раз, с 5 различными углами поворота и 5 различными значениями непрозрачности для заливки.
Несомненно, есть более эффективный способ сделать это, но этот метод показывает анимацию и тайминги, а также облегчение, чтобы придать ей более естественное, менее резкое чувство, когда круги вращаются и останавливаются.