Esempio n. 1
0
 public static IEnumerable <DependencyObject> GetVisualDescendantsAndSelf(this DependencyObject element)
 {
     if (element == null)
     {
         throw new ArgumentNullException("element");
     }
     return(VisualTreeExtensions.GetVisualDescendantsAndSelfIterator(element));
 }
Esempio n. 2
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 public static IEnumerable <DependencyObject> GetVisualAncestors(this DependencyObject element)
 {
     if (element == null)
     {
         throw new ArgumentNullException("element");
     }
     return(Enumerable.Skip <DependencyObject>(VisualTreeExtensions.GetVisualAncestorsAndSelfIterator(element), 1));
 }
Esempio n. 3
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        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>());
        }
Esempio n. 4
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        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);
                }
            }
        }
Esempio n. 5
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        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);
        }
Esempio n. 6
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        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();
            }
        }
Esempio n. 7
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        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)))));
        }
Esempio n. 8
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 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)));
 }
Esempio n. 9
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        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);
                    }
                }
            }
        }
Esempio n. 10
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 public static IEnumerable <DependencyObject> GetVisualSiblings(this DependencyObject element)
 {
     return(Enumerable.Where <DependencyObject>(VisualTreeExtensions.GetVisualSiblingsAndSelf(element), (Func <DependencyObject, bool>)(p => p != element)));
 }