[C#/WPF] 마우스 휠 막기(Behavior)

방법1> 마우스 휠 무시하도록 하는 Behavior의 구현.

 

▶ IgnoreMouseWheelBehavior.cs 

public sealed class IgnoreMouseWheelBehavior : Behavior<UIElement>
{
    protected override void OnAttached()
    {
        base.OnAttached();
        AssociatedObject.PreviewMouseWheel += AssociatedObject_PreviewMouseWheel;
    }

    protected override void OnDetaching()
    {
        AssociatedObject.PreviewMouseWheel -= AssociatedObject_PreviewMouseWheel;
        base.OnDetaching();
    }

    void AssociatedObject_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
    {
        e.Handled = true;
        var e2 = new MouseWheelEventArgs(e.MouseDevice, e.Timestamp, e.Delta);
        e2.RoutedEvent = UIElement.MouseWheelEvent;
        AssociatedObject.RaiseEvent(e2);
    }
}

 

▶ Xaml 에서의 사용

<ScrollViewer Name="ScrollA">
    <ListBox Name="ListA">
        <i:Interaction.Behaviors>
            <local:IgnoreMouseWheelBehavior />
        </i:Interaction.Behaviors>
    </ListBox>
</ScrollViewer>

---

방법2> 마우스 휠 무시하도록 하는 Behavior의 구현.

▶ NoWheelScrollViewer.cs 

public class NoWheelScrollViewer : ScrollViewer
{
    protected override void OnMouseWheel(MouseWheelEventArgs e)
    {
        // Do nothing
    }
}

▶ ControlTemplete 

<ControlTemplate x:Key="NoWheelScrollListBoxTemplate" TargetType="ListBox">
    <Border BorderThickness="{TemplateBinding Border.BorderThickness}" Padding="1,1,1,1" BorderBrush="{TemplateBinding Border.BorderBrush}" Background="{TemplateBinding Panel.Background}" Name="Bd" SnapsToDevicePixels="True">
        <l:NoWheelScrollViewer Padding="{TemplateBinding Control.Padding}" Focusable="False">
            <ItemsPresenter SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
        </l:NoWheelScrollViewer>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="UIElement.IsEnabled" Value="False">
            <Setter TargetName="Bd" Property="Panel.Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
        </Trigger>
        <Trigger Property="ItemsControl.IsGrouping" Value="True">
            <Setter Property="ScrollViewer.CanContentScroll" Value="False" />
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

▶ Xaml에서의 사용

<ListBox Template="{StaticResource NoWheelScrollListBoxTemplate}">