Initial Commit

Charts/LiveTooltips/LiveTooltipAdorner.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Documents;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Input;
+using System.Windows.Media.Effects;
+using System.Windows.Controls;
+using System.Windows.Shapes;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts
+{
+	public class LiveToolTipAdorner : Adorner
+	{
+		private Canvas canvas = new Canvas { IsHitTestVisible = false };
+		private readonly VisualCollection visualChildren;
+		public LiveToolTipAdorner(UIElement adornedElement, LiveToolTip tooltip)
+			: base(adornedElement)
+		{
+			visualChildren = new VisualCollection(this);
+
+			adornedElement.MouseLeave += adornedElement_MouseLeave;
+			adornedElement.MouseEnter += adornedElement_MouseEnter;
+			adornedElement.PreviewMouseMove += adornedElement_MouseMove;
+			//FrameworkElement frAdornedElement = (FrameworkElement)adornedElement;
+			//frAdornedElement.SizeChanged += frAdornedElement_SizeChanged;
+
+			this.liveTooltip = tooltip;
+
+			tooltip.Visibility = Visibility.Hidden;
+
+			canvas.Children.Add(liveTooltip);
+			AddLogicalChild(canvas);
+			visualChildren.Add(canvas);
+
+			Unloaded += LiveTooltipAdorner_Unloaded;
+		}
+
+		//void frAdornedElement_SizeChanged(object sender, SizeChangedEventArgs e)
+		//{
+		//    grid.Width = e.NewSize.Width;
+		//    grid.Height = e.NewSize.Height;
+
+		//    InvalidateMeasure();
+		//}
+
+		void LiveTooltipAdorner_Unloaded(object sender, RoutedEventArgs e)
+		{
+			canvas.Children.Remove(liveTooltip);
+		}
+
+		void adornedElement_MouseLeave(object sender, MouseEventArgs e)
+		{
+			liveTooltip.Visibility = Visibility.Hidden;
+		}
+
+		void adornedElement_MouseEnter(object sender, MouseEventArgs e)
+		{
+			liveTooltip.Visibility = Visibility.Visible;
+		}
+
+		Point mousePosition;
+		private void adornedElement_MouseMove(object sender, MouseEventArgs e)
+		{
+			liveTooltip.Visibility = Visibility.Visible;
+			mousePosition = e.GetPosition(AdornedElement);
+			InvalidateMeasure();
+		}
+
+		private void ArrangeTooltip()
+		{
+			Size tooltipSize = liveTooltip.DesiredSize;
+
+			Point location = mousePosition;
+			location.Offset(-tooltipSize.Width / 2, -tooltipSize.Height - 1);
+
+			liveTooltip.Arrange(new Rect(location, tooltipSize));
+		}
+
+		LiveToolTip liveTooltip;
+		public LiveToolTip LiveTooltip
+		{
+			get { return liveTooltip; }
+		}
+
+		#region Overrides
+
+		protected override Visual GetVisualChild(int index)
+		{
+			return visualChildren[index];
+		}
+
+		protected override int VisualChildrenCount
+		{
+			get { return visualChildren.Count; }
+		}
+
+		protected override Size MeasureOverride(Size constraint)
+		{
+			foreach (UIElement item in visualChildren)
+			{
+				item.Measure(constraint);
+			}
+
+			liveTooltip.Measure(constraint);
+
+			return base.MeasureOverride(constraint);
+		}
+
+		protected override Size ArrangeOverride(Size finalSize)
+		{
+			foreach (UIElement item in visualChildren)
+			{
+				item.Arrange(new Rect(item.DesiredSize));
+			}
+
+			ArrangeTooltip();
+
+			return finalSize;
+		}
+
+		#endregion // end of overrides
+	}
+}