public static IEnumerable <DependencyObject> GetVisualDescendantsAndSelf(this DependencyObject element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
return(VisualTreeExtensions.GetVisualDescendantsAndSelfIterator(element));
}
public static IEnumerable <DependencyObject> GetVisualAncestors(this DependencyObject element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
return(Enumerable.Skip <DependencyObject>(VisualTreeExtensions.GetVisualAncestorsAndSelfIterator(element), 1));
}
public static IEnumerable <DependencyObject> GetVisualSiblingsAndSelf(this DependencyObject element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
DependencyObject parent = VisualTreeHelper.GetParent(element);
if (parent != null)
{
return(VisualTreeExtensions.GetVisualChildren(parent));
}
return(Enumerable.Empty <DependencyObject>());
}
private static IEnumerable <DependencyObject> GetVisualDescendantsAndSelfIterator(DependencyObject element)
{
Queue <DependencyObject> remaining = new Queue <DependencyObject>();
remaining.Enqueue(element);
while (remaining.Count > 0)
{
DependencyObject obj = remaining.Dequeue();
yield return(obj);
foreach (DependencyObject dependencyObject in VisualTreeExtensions.GetVisualChildren(obj))
{
remaining.Enqueue(dependencyObject);
}
}
}
public static Panel GetItemsHost(this ItemsControl control)
{
if (control == null)
{
throw new ArgumentNullException("control");
}
DependencyObject reference = control.ItemContainerGenerator.ContainerFromIndex(0);
if (reference != null)
{
return(VisualTreeHelper.GetParent(reference) as Panel);
}
FrameworkElement parent = Enumerable.FirstOrDefault <DependencyObject>(VisualTreeExtensions.GetVisualChildren((DependencyObject)control)) as FrameworkElement;
if (parent != null)
{
ItemsPresenter itemsPresenter = Enumerable.FirstOrDefault <ItemsPresenter>(Enumerable.OfType <ItemsPresenter>((IEnumerable)VisualTreeExtensions.GetLogicalDescendents(parent)));
if (itemsPresenter != null && VisualTreeHelper.GetChildrenCount((DependencyObject)itemsPresenter) > 0)
{
return(VisualTreeHelper.GetChild((DependencyObject)itemsPresenter, 0) as Panel);
}
}
return((Panel)null);
}
public static void ScrollIntoView(this ScrollViewer viewer, FrameworkElement element, double horizontalMargin, double verticalMargin, Duration duration)
{
if (viewer == null)
{
throw new ArgumentNullException("viewer");
}
if (element == null)
{
throw new ArgumentNullException("element");
}
Rect?boundsRelativeTo = VisualTreeExtensions.GetBoundsRelativeTo(element, (UIElement)viewer);
if (!boundsRelativeTo.HasValue)
{
return;
}
double verticalOffset = viewer.VerticalOffset;
double num1 = 0.0;
double viewportHeight = viewer.ViewportHeight;
double num2 = boundsRelativeTo.Value.Bottom + verticalMargin;
if (viewportHeight < num2)
{
num1 = num2 - viewportHeight;
verticalOffset += num1;
}
double num3 = boundsRelativeTo.Value.Top - verticalMargin;
if (num3 - num1 < 0.0)
{
verticalOffset -= num1 - num3;
}
double horizontalOffset = viewer.HorizontalOffset;
double num4 = 0.0;
double viewportWidth = viewer.ViewportWidth;
double num5 = boundsRelativeTo.Value.Right + horizontalMargin;
if (viewportWidth < num5)
{
num4 = num5 - viewportWidth;
horizontalOffset += num4;
}
double num6 = boundsRelativeTo.Value.Left - horizontalMargin;
if (num6 - num4 < 0.0)
{
horizontalOffset -= num4 - num6;
}
if (duration == (Duration)TimeSpan.Zero)
{
viewer.ScrollToVerticalOffset(verticalOffset);
viewer.ScrollToHorizontalOffset(horizontalOffset);
}
else
{
Storyboard storyboard = new Storyboard();
ScrollViewerExtensions.SetVerticalOffset(viewer, viewer.VerticalOffset);
ScrollViewerExtensions.SetHorizontalOffset(viewer, viewer.HorizontalOffset);
DoubleAnimation doubleAnimation1 = new DoubleAnimation();
doubleAnimation1.To = new double?(verticalOffset);
doubleAnimation1.Duration = duration;
DoubleAnimation doubleAnimation2 = doubleAnimation1;
DoubleAnimation doubleAnimation3 = new DoubleAnimation();
doubleAnimation3.To = new double?(verticalOffset);
doubleAnimation3.Duration = duration;
DoubleAnimation doubleAnimation4 = doubleAnimation3;
Storyboard.SetTarget((DependencyObject)doubleAnimation2, (DependencyObject)viewer);
Storyboard.SetTarget((DependencyObject)doubleAnimation4, (DependencyObject)viewer);
Storyboard.SetTargetProperty((DependencyObject)doubleAnimation4, new PropertyPath((object)ScrollViewerExtensions.HorizontalOffsetProperty));
Storyboard.SetTargetProperty((DependencyObject)doubleAnimation2, new PropertyPath((object)ScrollViewerExtensions.VerticalOffsetProperty));
storyboard.Children.Add((Timeline)doubleAnimation2);
storyboard.Children.Add((Timeline)doubleAnimation4);
storyboard.Begin();
}
}
public static ScrollViewer GetScrollHost(this ItemsControl control)
{
if (control == null)
{
throw new ArgumentNullException("control");
}
Panel itemsHost = ItemsControlExtensions.GetItemsHost(control);
if (itemsHost == null)
{
return((ScrollViewer)null);
}
return(Enumerable.FirstOrDefault <ScrollViewer>(Enumerable.OfType <ScrollViewer>((IEnumerable)Enumerable.Where <DependencyObject>(VisualTreeExtensions.GetVisualAncestors((DependencyObject)itemsHost), (Func <DependencyObject, bool>)(c => c != control)))));
}
internal static IEnumerable <FrameworkElement> GetLogicalDescendents(this FrameworkElement parent)
{
return(FunctionalProgramming.TraverseBreadthFirst <FrameworkElement>(parent, (Func <FrameworkElement, IEnumerable <FrameworkElement> >)(node => VisualTreeExtensions.GetLogicalChildren(node)), (Func <FrameworkElement, bool>)(node => true)));
}
internal static IEnumerable <FrameworkElement> GetLogicalChildren(this FrameworkElement parent)
{
Popup popup = parent as Popup;
if (popup != null)
{
FrameworkElement popupChild = popup.Child as FrameworkElement;
if (popupChild != null)
{
yield return(popupChild);
}
}
ItemsControl itemsControl = parent as ItemsControl;
if (itemsControl != null)
{
foreach (FrameworkElement frameworkElement in Enumerable.OfType <FrameworkElement>((IEnumerable)Enumerable.Select <int, DependencyObject>(Enumerable.Range(0, itemsControl.Items.Count), (Func <int, DependencyObject>)(index => itemsControl.ItemContainerGenerator.ContainerFromIndex(index)))))
{
yield return(frameworkElement);
}
}
Queue <FrameworkElement> queue = new Queue <FrameworkElement>(Enumerable.OfType <FrameworkElement>((IEnumerable)VisualTreeExtensions.GetVisualChildren((DependencyObject)parent)));
while (queue.Count > 0)
{
FrameworkElement element = queue.Dequeue();
if (element.Parent == parent || element is UserControl)
{
yield return(element);
}
else
{
foreach (FrameworkElement frameworkElement in Enumerable.OfType <FrameworkElement>((IEnumerable)VisualTreeExtensions.GetVisualChildren((DependencyObject)element)))
{
queue.Enqueue(frameworkElement);
}
}
}
}
public static IEnumerable <DependencyObject> GetVisualSiblings(this DependencyObject element)
{
return(Enumerable.Where <DependencyObject>(VisualTreeExtensions.GetVisualSiblingsAndSelf(element), (Func <DependencyObject, bool>)(p => p != element)));
}
