WPF: disable ListViewItem base on model view property - wpf

Question

So I have this ModelView property that changed when my application do my stuff:
private bool isPlay;
public bool IsPlay
{
get { return isPlay; }
set
{
isPlay = value;
NotifyPropertyChanged("IsPlay");
}
}
And when this IsPlay is True I want my ListViewItem IsEnabled = False so this is my Style my ListView using:
<Style TargetType="{x:Type ListView}">
<Setter Property="TextBlock.TextAlignment" Value="Center"/>
<Setter Property="Margin" Value="5"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="SelectionMode" Value="Single"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
<Setter Property="AlternationCount" Value="2"/>
<!-- ListViewItem -->
<Setter Property="ItemContainerStyle">
<Setter.Value>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Height" Value="32"/>
<Setter Property="BorderBrush" Value="transparent"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<!--<Setter Property="IsSelected" Value="{Binding IsSelected}" />-->
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<GridViewRowPresenter Content="{TemplateBinding Content}"
Columns="{TemplateBinding GridView.ColumnCollection}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Path=IsPlay}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter Property="Background">
<Setter.Value>
<SolidColorBrush Color="Gray" Opacity="0.1"/>
</Setter.Value>
</Setter>
<Setter Property="IsEnabled" Value="False"/>
</MultiDataTrigger>
</Style.Triggers>
</Style>
</Setter.Value>
</Setter>
</Style>
The problem is that the ListViewItem IsEnabled not changed so I bind this IsPlay property into some TextBlock to see is its change its state properly (True to False or vice versa) and this working fine but my ListView Style not.
Update
Here the declaration of my View Model (only one instance):
<Window.DataContext>
<viewmodel:ViewModelBase/>
</Window.DataContext>

Answer 1

The ListViewItem.DataContext is bound to the data items of your list, so you can't directly access properties that exist at the level of the ListView.
You can use a relative binding in this case:
<Condition Binding="{Binding DataContext.IsPlay,RelativeSource={RelativeSource AncestorType=ListView,Mode=FindAncestor}}" Value="True"/>