Dim Dim - 3 months ago 40
C# Question

Animate button background color in XAML

I new to WPF and XAML, so I have

ResourceDictionary
(one button for now):

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

<Style x:Key="ButtonProduct" TargetType="Button">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="HorizontalAlignment" Value="Center"/>

<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Name="Border"
CornerRadius="0"
BorderThickness="0"
Focusable="False"
BorderBrush="Transparent" Background="White">
<ContentPresenter Margin="2" HorizontalAlignment="Center" VerticalAlignment="Center" RecognizesAccessKey="True"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="#52b0ca"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>


On hover the color of the button changes, but how can I make change in fade in and out, for smooth transition of the color?

Answer

You can use EventTrigger to start ColorAnimation on MouseEnter and MouseLeave:

<ControlTemplate TargetType="{x:Type Button}">
   <Border Name="Border" CornerRadius="0" BorderThickness="0" Focusable="False" BorderBrush="Transparent" Background="White">
      <ContentPresenter Margin="2" HorizontalAlignment="Center" VerticalAlignment="Center" RecognizesAccessKey="True"/>
   </Border>
   <ControlTemplate.Triggers>
      <EventTrigger RoutedEvent="MouseEnter">
         <BeginStoryboard>
            <Storyboard>
               <ColorAnimation From="White" To="#52b0ca" Duration="0:0:1" Storyboard.TargetName="Border" Storyboard.TargetProperty="Background.Color"/>
            </Storyboard>
         </BeginStoryboard>
      </EventTrigger>
      <EventTrigger RoutedEvent="MouseLeave">
         <BeginStoryboard>
            <Storyboard>
               <ColorAnimation From="#52b0ca" To="White" Duration="0:0:1" Storyboard.TargetName="Border" Storyboard.TargetProperty="Background.Color"/>
            </Storyboard>
         </BeginStoryboard>
      </EventTrigger>
   </ControlTemplate.Triggers>
</ControlTemplate>
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