Is it possible to change properties on a sub item in a DataTemplate using triggers from the containing control?

Question

I want to change the background colour of the rectangle in the IsMouseOver trigger, is this possible?

<Window>
    <Window.Resources>
     <DataTemplate x:Key="StackListViewItemTemplate">
       <Grid>
        <Rectangle RadiusX="5" RadiusY="5" >
         <Rectangle.Fill>
          <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
           <GradientStop Color="#FF000000" Offset="0"/>
           <GradientStop Color="{Binding Path=Events.Colour}" Offset="1"/>
          </LinearGradientBrush>
         </Rectangle.Fill>
        </Rectangle>
        <TextBlock FontSize="18pt" Grid.RowSpan="2" Text="{Binding Path=Events.Name}" HorizontalAlignment="Center" VerticalAlignment="Center"  />
       </Grid>
      </Grid>
     </DataTemplate>
    </Window.Resources>

    <Grid >
     <ListView ItemTemplate="{DynamicResource StackListViewItemTemplate}">
      <ListView.ItemContainerStyle>
       <Style TargetType="{x:Type ListViewItem}">
        <Style.Triggers>
         <Trigger Property="IsMouseOver" Value="true">
          <!-- Here I want to set the background colour of the Rectangle in the DataTemplate -->
         </Trigger>
         <Trigger Property="IsSelected" Value="true">
          <!-- Same here -->
         </Trigger>
        </Style.Triggers>

       </Style>
      </ListView.ItemContainerStyle>
     </ListView>
    </Grid>

</Window>

Edit:

<Setter Property="Background" Value="Yellow"/>

Is there a way to bind the Property value of the setter to child controls?

Answer 1

Yes, you should be able to do something like this:

XAML Tutorial - Changing the Text Color on Mouse Over

...but with a rectangle of course.

Answer 2

I got it working using a datatrigger in the template

<DataTemplate x:Key="listItemTemplate" DataType="ListViewItem">
    <Grid>
     <Rectangle Name="myRectangle" RadiusX="5" RadiusY="5" >
      <Rectangle.Fill>
       <SolidColorBrush Color="Red" />
      </Rectangle.Fill>
     </Rectangle>
    </Grid>
    <DataTemplate.Triggers>
     <DataTrigger Binding="{Binding Path=IsSelected, RelativeSource={RelativeSource FindAncestor, AncestorType=ListViewItem}}" Value="True">
      <Setter TargetName="myRectangle" Property="Fill" >
       <Setter.Value>
        <SolidColorBrush Color="Green" />
       </Setter.Value>
      </Setter>
     </DataTrigger>
    </DataTemplate.Triggers>
</DataTemplate>