/Main/src/DynamicDataDisplay/Charts/LiveTooltips/LiveTooltipService.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Input;

using System.Windows.Documents;

using System.Windows.Controls;

using System.Windows.Media;

using System.Windows.Data;

using System.ComponentModel;



namespace Microsoft.Research.DynamicDataDisplay.Charts

{

	public static class LiveToolTipService

	{



		# region Properties



		public static object GetToolTip(DependencyObject obj)

		{

			return (object)obj.GetValue(ToolTipProperty);

		}



		public static void SetToolTip(DependencyObject obj, object value)

		{

			obj.SetValue(ToolTipProperty, value);

		}



		public static readonly DependencyProperty ToolTipProperty = DependencyProperty.RegisterAttached(

		  "ToolTip",

		  typeof(object),

		  typeof(LiveToolTipService),

		  new FrameworkPropertyMetadata(null, OnToolTipChanged));



		private static LiveToolTip GetLiveToolTip(DependencyObject obj)

		{

			return (LiveToolTip)obj.GetValue(LiveToolTipProperty);

		}



		private static void SetLiveToolTip(DependencyObject obj, LiveToolTip value)

		{

			obj.SetValue(LiveToolTipProperty, value);

		}



		private static readonly DependencyProperty LiveToolTipProperty = DependencyProperty.RegisterAttached(

		  "LiveToolTip",

		  typeof(LiveToolTip),

		  typeof(LiveToolTipService),

		  new FrameworkPropertyMetadata(null));



		#region Opacity



		public static double GetTooltipOpacity(DependencyObject obj)

		{

			return (double)obj.GetValue(TooltipOpacityProperty);

		}



		public static void SetTooltipOpacity(DependencyObject obj, double value)

		{

			obj.SetValue(TooltipOpacityProperty, value);

		}



		public static readonly DependencyProperty TooltipOpacityProperty = DependencyProperty.RegisterAttached(

		  "TooltipOpacity",

		  typeof(double),

		  typeof(LiveToolTipService),

		  new FrameworkPropertyMetadata(1.0, OnTooltipOpacityChanged));



		private static void OnTooltipOpacityChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

		{

			LiveToolTip liveTooltip = GetLiveToolTip(d);

			if (liveTooltip != null)

			{

				liveTooltip.Opacity = (double)e.NewValue;

			}

		}



		#endregion // end of Opacity



		#region IsPropertyProxy property



		public static bool GetIsPropertyProxy(DependencyObject obj)

		{

			return (bool)obj.GetValue(IsPropertyProxyProperty);

		}



		public static void SetIsPropertyProxy(DependencyObject obj, bool value)

		{

			obj.SetValue(IsPropertyProxyProperty, value);

		}



		public static readonly DependencyProperty IsPropertyProxyProperty = DependencyProperty.RegisterAttached(

		  "IsPropertyProxy",

		  typeof(bool),

		  typeof(LiveToolTipService),

		  new FrameworkPropertyMetadata(false));



		#endregion // end of IsPropertyProxy property



		#endregion



		private static void OnToolTipChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

		{

			FrameworkElement source = (FrameworkElement)d;



			if (e.NewValue == null)

			{

				source.Loaded -= source_Loaded;

				source.ClearValue(LiveToolTipProperty);

			}



			if (GetIsPropertyProxy(source)) return;



			var content = e.NewValue;



			DataTemplate template = content as DataTemplate;

			if (template != null)

			{

				content = template.LoadContent();

			}



			LiveToolTip tooltip = null;

			if (e.NewValue is LiveToolTip)

			{

				tooltip = e.NewValue as LiveToolTip;

			}

			else

			{

				tooltip = new LiveToolTip { Content = content };

			}



			if (tooltip == null && e.OldValue == null)

			{

				tooltip = new LiveToolTip { Content = content };

			}



			if (tooltip != null)

			{

				SetLiveToolTip(source, tooltip);

				if (!source.IsLoaded)

				{

					source.Loaded += source_Loaded;

				}

				else

				{

					AddTooltip(source);

				}

			}

		}



		private static void AddTooltipForElement(FrameworkElement source, LiveToolTip tooltip)

		{

			AdornerLayer layer = AdornerLayer.GetAdornerLayer(source);



			LiveToolTipAdorner adorner = new LiveToolTipAdorner(source, tooltip);

			layer.Add(adorner);

		}



		private static void source_Loaded(object sender, RoutedEventArgs e)

		{

			FrameworkElement source = (FrameworkElement)sender;



			if (source.IsLoaded)

			{

				AddTooltip(source);

			}

		}



		private static void AddTooltip(FrameworkElement source)

		{

			if (DesignerProperties.GetIsInDesignMode(source)) return;



			LiveToolTip tooltip = GetLiveToolTip(source);



			Window window = Window.GetWindow(source);

			FrameworkElement child = source;

			FrameworkElement parent = null;

			if (window != null)

			{

				while (parent != window)

				{

					parent = (FrameworkElement)VisualTreeHelper.GetParent(child);

					child = parent;



					if (parent == null)

						return;



					var nameScope = NameScope.GetNameScope(parent);

					if (nameScope != null)

					{

						string nameScopeName = nameScope.ToString();

						if (nameScopeName != "System.Windows.TemplateNameScope")

						{

							NameScope.SetNameScope(tooltip, nameScope);

							break;

						}

					}

				}

			}



			var binding = BindingOperations.GetBinding(tooltip, LiveToolTip.ContentProperty);

			if (binding != null)

			{

				BindingOperations.ClearBinding(tooltip, LiveToolTip.ContentProperty);

				BindingOperations.SetBinding(tooltip, LiveToolTip.ContentProperty, binding);

			}



			Binding dataContextBinding = new Binding { Path = new PropertyPath("DataContext"), Source = source };

			tooltip.SetBinding(LiveToolTip.DataContextProperty, dataContextBinding);



			tooltip.Owner = source;

			if (GetTooltipOpacity(source) != (double)LiveToolTipService.TooltipOpacityProperty.DefaultMetadata.DefaultValue)

			{

				tooltip.Opacity = LiveToolTipService.GetTooltipOpacity(source);

			}



			AddTooltipForElement(source, tooltip);

		}

	}

}