I have a WPF style that is a border. It is used for a button.
<Style x:Key="RoundCorner" TargetType="{x:Type Button}">
<Setter Property="ClickMode" Value="Press"/>
<EventSetter Event="PreviewMouseUp" Handler="RegularButtonRelease"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Grid x:Name="grid">
<Border x:Name="border" CornerRadius="2" BorderBrush="#FF444444" BorderThickness="1">
<Border.Background>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1.2" >
<GradientStop Color="#ffaaaaaa" Offset="0" />
<GradientStop Color="White" Offset="1" />
</LinearGradientBrush>
</Border.Background>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsPressed" Value="True">
<!--some style -->
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<!--some style -->
</Trigger>
<EventTrigger RoutedEvent="PreviewMouseLeftButtonUp">
<BeginStoryboard>
<Storyboard Duration="0:0:2" AutoReverse="False">
<ColorAnimation
Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"
FillBehavior="Stop" To="Tomato"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I want to set the border background color to a different one for a given time, when I release the mouse click on the button. (e.g. the button is black when pressed, and when I release, it changes to red, then changes back to white)
Using the above code, I can see the button color keep changing after I release mouse button, and my event handler RegularButtonRelease
is fired continuously too.
Soon the appplication hangs, and gives me a System.StackOverflowException
exception.
If I take away the EventTrigger
in style, my applications perform correctly, so my EventTrigger must be wrong.
My question is, how could I correctly set a background color change at mouse button up (using the EventTrigger or something else)?
UPDATE:
I try to set the border and background at the same time using:
<ColorAnimation
Duration="0:0:0.8"
Storyboard.TargetName="border"
Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)"
To="Red"/>
<ColorAnimation
Duration="0:0:0.8"
Storyboard.TargetName="border"
Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"
To="Red"/>
This time the border line is changing to red, works like a charm. But the background still sits there, no any changes.
How can I correctly change my background?