protected override void OnAttach()
{
_parentDockManager = XamDockManager.GetDockManager(_hostControl);
if (_parentDockManager != null)
{
_parentDockManager.ActivePaneChanged += DockManager_ActivePaneChanged;
}
Region.ActiveViews.CollectionChanged += ActiveViews_CollectionChanged;
}
ContentPane GetContentPaneFromFromViewModel(object viewModel)
{
var panes = XamDockManager.GetDockManager(_hostControl).GetPanes(PaneNavigationOrder.VisibleOrder);
foreach (ContentPane contentPane in panes)
{
if (contentPane.DataContext == viewModel)
{
return(contentPane);
}
}
return(null);
}
private ContentPane GetSiblingDocument()
{
DocumentContentHost dch = _target as DocumentContentHost;
if (dch == null)
{
return(null);
}
if (null != dch.ActiveDocument)
{
return(dch.ActiveDocument);
}
XamDockManager dm = XamDockManager.GetDockManager(dch);
if (dm == null)
{
return(null);
}
ContentPane firstDocument = null;
foreach (ContentPane cp in dm.GetPanes(PaneNavigationOrder.VisibleOrder))
{
if (cp.PaneLocation != PaneLocation.Document)
{
continue;
}
if (firstDocument == null)
{
firstDocument = cp;
}
if (cp.Visibility != Visibility.Visible)
{
continue;
}
return(cp);
}
return(firstDocument);
}
private void OnViewsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e, IRegion region, TabGroupPane regionTarget)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
//we want to add them behind any previous views that may have been manually declare in XAML or injected
int startIndex = e.NewStartingIndex;
foreach (object newItem in e.NewItems)
{
ContentPane contentPane = PrepareContainerForItem(newItem, region);
if (regionTarget.Items.Count != startIndex)
{
startIndex = 0;
}
//we must make sure we bring the TabGroupPane into view. If we don't a System.StackOverflowException will occur in
//UIAutomationProvider.dll if trying to add a ContentPane to a TabGroupPane that is not in view.
//This is most common when using nested TabGroupPane regions. If you don't this, you can comment it out.
regionTarget.BringIntoView();
regionTarget.Items.Insert(startIndex, contentPane);
regionTarget.Items.MoveCurrentTo(contentPane);
regionTarget.SelectedIndex = startIndex;
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
if (regionTarget.Items.Count == 0)
{
return;
}
IEnumerable <ContentPane> contentPanes = XamDockManager.GetDockManager(regionTarget).GetPanes(PaneNavigationOrder.VisibleOrder);
foreach (ContentPane contentPane in contentPanes)
{
if (e.OldItems.Contains(contentPane) || e.OldItems.Contains(contentPane.Content))
{
contentPane.ExecuteCommand(ContentPaneCommands.Close);
}
}
}
}
ContentPane GetContentPaneFromFromViewModel(object viewModel)
{
var panes = XamDockManager.GetDockManager(_hostControl).GetPanes(PaneNavigationOrder.VisibleOrder);
return(panes.FirstOrDefault(contentPane => contentPane.DataContext == viewModel));
}