Brian Anderson
Reputation: 237
WPF Flip Animation
I'm trying to create a control in WPF, similar to a card, that will have bound data on both "sides". Using the following code I can get it to flip from FIRST NAME to LAST NAME, just not back. Once it flips to LAST NAME and I click it just flashes like it's performing the same animation and not running the reverse. Any insight into this problem would be greatly appreciated.
<UserControl x:Class="WpfApplication2.TileControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<UserControl.Resources>
<Storyboard x:Key="FlipFirst">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Back">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Back">
<EasingDoubleKeyFrame KeyTime="0" Value="-1"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Front">
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Front">
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="-1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="FlipLast">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Back">
<SplineDoubleKeyFrame KeyTime="0" Value="1"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Back">
<SplineDoubleKeyFrame KeyTime="0" Value="1"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="-1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Front">
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Front">
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</UserControl.Resources>
<UserControl.Triggers>
<EventTrigger RoutedEvent="UIElement.MouseLeftButtonDown" SourceName="Front">
<BeginStoryboard x:Name="Storyboard_Begin" Storyboard="{StaticResource FlipFirst}"/>
</EventTrigger>
<EventTrigger RoutedEvent="UIElement.MouseLeftButtonDown" SourceName="Back">
<StopStoryboard BeginStoryboardName="Storyboard_Begin" />
<BeginStoryboard x:Name="Storyboard_Reversed" Storyboard="{StaticResource FlipLast}" />
</EventTrigger>
</UserControl.Triggers>
<Grid x:Name="LayoutRoot" Width="280" Height="680">
<Grid x:Name="Back" HorizontalAlignment="Left" Height="680" VerticalAlignment="Top" Width="280" Background="{DynamicResource {x:Static SystemColors.ActiveCaptionBrushKey}}" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Grid.RenderTransform>
<TextBlock x:Name="LastName" HorizontalAlignment="Center" TextWrapping="Wrap" VerticalAlignment="Center" Margin="0" Text="LAST NAME" Width="100" Height="100"/>
</Grid>
<Grid x:Name="Front" HorizontalAlignment="Left" Height="680" VerticalAlignment="Top" Width="280" Background="{DynamicResource {x:Static SystemColors.ActiveCaptionBrushKey}}" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Grid.RenderTransform>
<TextBlock x:Name="FirstName" HorizontalAlignment="Center" TextWrapping="Wrap" Text="FIRST NAME" VerticalAlignment="Center" Width="100" Height="100"/>
</Grid>
</Grid>
</UserControl>
Upvotes: 0
Views: 4236
Answers (1)
ajay gandhi
Reputation: 563
The problem with the code is that first time when animation is run, the grid named "back" becomes visible to the user and grid named "front" becomes transparent. But still it is on the top of "Back" grid and capturing all the mouse hit. So, when user again left click the mouse, it is captured by front grid not the back grid. To solve this problem, You need to IsHitTestVisible to false when grid is transparent. See the below code.
<UserControl x:Class="WpfApplication2.TileControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<UserControl.Resources>
<Storyboard x:Key="FlipFirst">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Back">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Back">
<EasingDoubleKeyFrame KeyTime="0" Value="-1"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Front">
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Front">
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="-1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="FlipLast">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Back">
<SplineDoubleKeyFrame KeyTime="0" Value="1"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Back">
<SplineDoubleKeyFrame KeyTime="0" Value="1"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="-1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Front">
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="Front">
<SplineDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.4" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</UserControl.Resources>
<UserControl.Triggers>
<EventTrigger RoutedEvent="UIElement.MouseLeftButtonDown" SourceName="Front">
<BeginStoryboard x:Name="Storyboard_Begin" Storyboard="{StaticResource FlipFirst}"/>
</EventTrigger>
<EventTrigger RoutedEvent="UIElement.MouseLeftButtonDown" SourceName="Back">
<StopStoryboard BeginStoryboardName="Storyboard_Begin" />
<BeginStoryboard x:Name="Storyboard_Reversed" Storyboard="{StaticResource FlipLast}" />
</EventTrigger>
</UserControl.Triggers>
<Grid x:Name="LayoutRoot" Width="280" Height="680">
<Grid.Resources>
<Style TargetType="Grid">
<Setter Property="IsHitTestVisible" Value="True" />
<Style.Triggers>
<Trigger Property="Opacity" Value="0">
<Setter Property="IsHitTestVisible" Value="False"/>
</Trigger>
</Style.Triggers>
</Style>
</Grid.Resources>
<Grid x:Name="Back" HorizontalAlignment="Left" Height="680" VerticalAlignment="Top" Width="280" Background="{DynamicResource {x:Static SystemColors.ActiveCaptionBrushKey}}" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Grid.RenderTransform>
<TextBlock x:Name="LastName" HorizontalAlignment="Center" TextWrapping="Wrap" VerticalAlignment="Center" Margin="0" Text="LAST NAME" Width="100" Height="100"/>
</Grid>
<Grid x:Name="Front" HorizontalAlignment="Left" Height="680" VerticalAlignment="Top" Width="280" Background="{DynamicResource {x:Static SystemColors.ActiveCaptionBrushKey}}" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Grid.RenderTransform>
<TextBlock x:Name="FirstName" HorizontalAlignment="Center" TextWrapping="Wrap" Text="FIRST NAME" VerticalAlignment="Center" Width="100" Height="100"/>
</Grid>
</Grid>
</UserControl>
Upvotes: 2
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