How to disable hiding of a LayoutAnchorable when using MVVM

Question

I'm trying to use AvalonDock with MVVM and disabling the hide feature of a LayoutAnchorable. Without MVVM, I can do something like:

<xcad:LayoutAnchorable CanHide="False">
  <TextBox>Some Content</TextBox>
</xcad:LayoutAnchorable>

The CanHide="False" disables hiding.

How can I access the CanHide property using MVVM or disable hiding in another way?

I have:

<xcad:DockingManager AnchorablesSource="{Binding UserPanelList}">
  <xcad:DockingManager.LayoutItemContainerStyle>
    <Style TargetType="xcad:LayoutItem">
      <Setter Property="Title" Value="{Binding Model.Title}" />
      <Setter Property="ContentId" Value="{Binding Model.ContentId}" />
    </Style>
  </xcad:DockingManager.LayoutItemContainerStyle>

  <xcad:DockingManager.LayoutItemTemplate>
    <DataTemplate>
      <ContentPresenter Content="{Binding Control}" />
    </DataTemplate>
  </xcad:DockingManager.LayoutItemTemplate>

  <xcad:LayoutRoot>
    <xcad:LayoutPanel Orientation="Horizontal">
      <xcad:LayoutAnchorablePane>
      </xcad:LayoutAnchorablePane>
    </xcad:LayoutPanel>
  </xcad:LayoutRoot>
</xcad:DockingManager>

And a completely trivial model class:

public class UserPanel : INotifyPropertyChanged
{
  public string Title { get; set; }
  public string ContentId { get; set; }
  public bool CanHide { get; set; }         // ??
  // (NotifyPropertyChanged not implemented for these properties here
  // for the sake of brevity. Basically works without.)

  public UserControl Control
  {
    get => _userInterface;
    set
    {
      if (value != _userInterface)
      {
        _userInterface = value;
        OnPropertyChanged();
      }
    }
  }
  UserControl _userInterface;

  public event PropertyChangedEventHandler PropertyChanged;

  void OnPropertyChanged([CallerMemberName] string propertyName = null)
  {
    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
  }
}

The view classes are created from the contents of the bound UserPanelList.

However, the LayoutItem class does not contain a CanHide property, i.e. I cannot use a <Setter> afaik. What can I do instead?

Answer 1

The class LayoutAnchorableItem that derives from LayoutItem is used for LayoutAnchorables (see e.g. here). It has a dependency property CanHide that works as expected.

On can set the style for LayoutAnchorableItem either by

<Style TargetType="xcad:LayoutAnchorableItem">
  <!-- ... -->
  <Setter Property="CanHide" Value="{Binding Model.CanHide}" />

or, more flexible, by

<Style TargetType="xcad:LayoutItem">
  <!-- ... -->
  <Setter Property="xcad:LayoutAnchorableItem.CanHide" Value="{Binding Model.CanHide}" />