Creating an event trigger

Till now, we have seen property triggers and data triggers, which work based on comparing a property to a value. In this recipe, we will learn about event triggers which fire when a routed event occurs.

Getting ready

Inside your Visual Studio IDE, create a new project called CH06.EventTriggerDemo, based on the WPF application template.

How to do it...

Follow these steps to create a simple event trigger on a TextBlock control:

1. Open the MainWindow.xaml and add the following TextBlock inside the Grid:

<TextBlock Text="Hover here"  
           FontSize="30"  
           Opacity="0.2"  
           HorizontalAlignment="Center"  
           VerticalAlignment="Center"> 
    <TextBlock.Style> 
 
    </TextBlock.Style> 
</TextBlock> 

2. Add the following style, containing EventTrigger, to the TextBlock.Style attribute:

<Style TargetType="TextBlock"> 
    <Style.Triggers> 
        <EventTrigger RoutedEvent="MouseEnter"> 
            <EventTrigger...