private void OnViewHeaderDragStarted(object sender, DragAbsoluteEventArgs args)
{
DragUndockHeader dragUndockHeader = (DragUndockHeader)args.OriginalSource;
if (dragUndockHeader.ViewElement != null && DockManager.Instance.DraggedViewElements.Count == 0)
{
DockManager.Instance.SetDraggedViewElements(dragUndockHeader.ViewElement);
}
if (!dragUndockHeader.IsWindowTitleBar && dragUndockHeader.ViewElement != null)
{
dragUndockHeader.CancelDrag();
if (DockManager.Instance.DraggedTabInfo != null && this.IsAutoDockAllowed(DockManager.Instance.DraggedTabInfo.TabStrip))
{
if (-1 != DockManager.Instance.DraggedTabInfo.DraggedTabPosition)
{
DockManager.Instance.DraggedTabInfo.RemoveTabRect(DockManager.Instance.DraggedTabInfo.DraggedTabPosition);
}
DockManager.Instance.DraggedTabInfo.Initialize(dragUndockHeader.ViewElement);
DockManager.Instance.DraggedTabInfo.DraggedTabPosition = -1;
}
else
{
DockManager.Instance.DraggedTabInfo = (DraggedTabInfo)null;
}
Rect currentUndockingRect = Rect.Empty;
if (dragUndockHeader.ViewFrameworkElement != null && ExtensionMethods.IsConnectedToPresentationSource((DependencyObject)dragUndockHeader.ViewFrameworkElement))
{
currentUndockingRect = new Rect(dragUndockHeader.ViewFrameworkElement.PointToScreen(new Point(0.0, 0.0)), DpiHelper.LogicalToDeviceUnits(dragUndockHeader.ViewFrameworkElement.RenderSize));
}
DockOperations.Undock(dragUndockHeader.ViewElement, dragUndockHeader.ViewElement.WindowProfile, args.ScreenPoint, currentUndockingRect);
}
DockManager.Instance.IsDragging = true;
}
public Rect MeasureTabStrip()
{
if (this.TabStrip == null)
{
throw new InvalidOperationException("TabStrip must be initialized.");
}
this.draggedTabPosition = -1;
Point topLeft = new Point(double.MaxValue, double.MaxValue);
Point bottomRight = new Point(double.MinValue, double.MinValue);
this.tabRects.Clear();
foreach (UIElement uiElement in this.TabStrip.Children)
{
TabItem tabChild = uiElement as TabItem;
if (tabChild != null)
{
this.MeasureTabItem(tabChild, ref topLeft, ref bottomRight);
ViewElement viewElement = tabChild.DataContext as ViewElement;
if (viewElement != null && viewElement == this.DraggedViewElement)
{
this.draggedTabPosition = this.tabRects.Count - 1;
}
}
}
if (topLeft.X == double.MaxValue || topLeft.Y == double.MaxValue || (bottomRight.X == double.MinValue || bottomRight.Y == double.MinValue))
{
topLeft.X = 0.0;
topLeft.Y = 0.0;
bottomRight.X = 0.0;
bottomRight.Y = 0.0;
this.tabRects.Clear();
}
this.tabStripRect = new Rect(topLeft, bottomRight);
DockTarget ancestor = Microsoft.VisualStudio.PlatformUI.ExtensionMethods.FindAncestor <DockTarget>((Visual)this.TabStrip);
if (ancestor != null && ancestor.DockTargetType == DockTargetType.Auto && ExtensionMethods.IsConnectedToPresentationSource((DependencyObject)ancestor))
{
this.tabStripRect = new Rect(ancestor.PointToScreen(new Point(0.0, 0.0)), DpiHelper.LogicalToDeviceUnits(new Size(ancestor.ActualWidth, ancestor.ActualHeight)));
}
this.NormalizeTabHeight();
return(this.tabStripRect);
}