Lower opacity when ListBox not enabled

Author: mgnslndh

MainDemo.Wpf/Lists.xaml

@@ -14,17 +14,22 @@
         </ResourceDictionary>
     </UserControl.Resources>
     <Grid Margin="8">
+        <Grid.RowDefinitions>
+            <RowDefinition/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
         <Grid.ColumnDefinitions>
             <ColumnDefinition Width="1*" />
             <ColumnDefinition Width="1*" />
             <ColumnDefinition Width="1*" />
         </Grid.ColumnDefinitions>
-        <ListBox Grid.Column="0">
+        <ListBox Grid.Column="0" IsEnabled="{Binding IsChecked, ElementName=EnableListBox}">
             <TextBlock>Plain</TextBlock>
             <TextBlock>Old</TextBlock>
             <TextBlock>ListBox</TextBlock>
             <TextBlock>Full of junk</TextBlock>
         </ListBox>
+        <CheckBox Name="EnableListBox" Grid.Row="1" IsChecked="True">Enabled</CheckBox>
         <!-- piece together your own items control to create some nice stuff that will make everyone think you are cool. and rightly so, because you are cool.  you might even be a hipster for all I know -->
         <ItemsControl Grid.Column="1" ItemsSource="{Binding Items1}"
                       Grid.IsSharedSizeScope="True"

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.ListBox.xaml

@@ -133,6 +133,9 @@
                         <Trigger Property="IsSelected" Value="True">
                             <Setter TargetName="Ripple" Property="Opacity" Value=".92" />
                         </Trigger>
+                        <Trigger Property="IsEnabled" Value="False">
+                            <Setter Property="Opacity" Value=".56" />
+                        </Trigger>
                     </ControlTemplate.Triggers>
                 </ControlTemplate>
             </Setter.Value>
@@ -270,6 +273,11 @@
                                         Padding="{TemplateBinding Padding}"/>
                         </Grid>
                     </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsEnabled" Value="False">
+                            <Setter Property="Opacity" Value=".56" />
+                        </Trigger>
+                    </ControlTemplate.Triggers>
 				</ControlTemplate>
 			</Setter.Value>
 		</Setter>