protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
bool flag = false;
TabItem tabItem = this.FindAncestor <TabItem>();
if (tabItem != null)
{
DraggedTabInfo draggedTabInfo = DockManager.Instance.DraggedTabInfo;
if (draggedTabInfo != null && draggedTabInfo.DraggedViewElement == this.ViewElement)
{
flag = true;
ReorderTabPanel parent = tabItem.Parent as ReorderTabPanel ?? VisualTreeHelper.GetParent(tabItem) as ReorderTabPanel;
if (parent != null && draggedTabInfo != null && (draggedTabInfo.TabStrip != parent || parent.Children.Count != draggedTabInfo.TabRects.Count))
{
draggedTabInfo.TabStrip = parent;
draggedTabInfo.TabStrip.IsNotificationNeeded = true;
}
}
}
bool flag1 = (DockManager.Instance.UndockingInformation == null ? false : DockManager.Instance.UndockingInformation.Element == this.ViewElement);
if (NativeMethods.IsLeftButtonPressed() && (flag1 || flag))
{
this.BeginDragging((flag1 ? DockManager.Instance.UndockingInformation.Location : NativeMethods.GetCursorPos()));
}
}
internal virtual DraggedTabInfo GetAutodockTarget(DragAbsoluteEventArgs args)
{
DraggedTabInfo draggedTabInfo = (DraggedTabInfo)null;
FloatingElement floatingElement = Microsoft.VisualStudio.PlatformUI.ExtensionMethods.FindAncestor <FloatingElement>((Visual)(args.OriginalSource as DragUndockHeader));
if (this.DraggedTabInfo != null && this.DraggedTabInfo.TabStripRect.Contains(args.ScreenPoint))
{
draggedTabInfo = this.DraggedTabInfo;
}
else
{
DockManager.DockSiteHitTestResult hitElement = this.FindHitElement(args.ScreenPoint, (Predicate <DockManager.DockSite>)(s =>
{
if (s.Visual != floatingElement)
{
return(!(s.Visual is DockAdornerWindow));
}
return(false);
}));
if (hitElement != null)
{
ReorderTabPanel reorderTabPanel = (ReorderTabPanel)null;
for (DependencyObject sourceElement = (DependencyObject)hitElement.VisualHit; sourceElement != null && reorderTabPanel == null; sourceElement = Microsoft.VisualStudio.PlatformUI.ExtensionMethods.GetVisualOrLogicalParent(sourceElement))
{
DockTarget dockTarget = sourceElement as DockTarget;
if (dockTarget != null && dockTarget.DockTargetType == DockTargetType.Auto && dockTarget.Visibility == Visibility.Visible)
{
reorderTabPanel = Microsoft.VisualStudio.PlatformUI.ExtensionMethods.FindDescendant <ReorderTabPanel>((DependencyObject)dockTarget);
}
}
if (reorderTabPanel != null)
{
draggedTabInfo = new DraggedTabInfo();
draggedTabInfo.TabStrip = reorderTabPanel;
draggedTabInfo.MeasureTabStrip();
ViewGroup viewGroup = reorderTabPanel.DataContext as ViewGroup;
if (viewGroup == null)
{
throw new InvalidOperationException("Reorder tab panel should always have ViewGroup as its DataContext.");
}
draggedTabInfo.NestedGroup = (ViewElement)viewGroup;
if (viewGroup.VisibleChildren.Count > 0)
{
draggedTabInfo.Sibling = viewGroup.VisibleChildren[0];
}
}
}
}
return(draggedTabInfo);
}