Initial Commit

Charts/Navigation/PhysicalNavigation.cs

@@ -0,0 +1,120 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Research.DynamicDataDisplay.Navigation;
+using System.Windows.Input;
+using System.Diagnostics;
+using System.Windows;
+using System.Windows.Media.Animation;
+using System.Windows.Threading;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts.Navigation
+{
+	public class PhysicalNavigation : IPlotterElement
+	{
+		private readonly DispatcherTimer timer;
+
+		public PhysicalNavigation()
+		{
+			timer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(30) };
+			timer.Tick += timer_Tick;
+		}
+
+		DateTime startTime;
+		private void timer_Tick(object sender, EventArgs e)
+		{
+			TimeSpan time = DateTime.Now - startTime;
+			animation.UseMouse = isMouseDown;
+			if (!isMouseDown)
+			{
+				animation.LiquidFrictionQuadraticCoeff = 1;
+			}
+
+			plotter.Viewport.Visible = animation.GetValue(time);
+			if (animation.IsFinished && !isMouseDown)
+			{
+				timer.Stop();
+			}
+		}
+
+		private bool isMouseDown = false;
+		private PhysicalRectAnimation animation;
+		private Point clickPos;
+		private void OnMouseDown(object sender, MouseButtonEventArgs e)
+		{
+			if (e.ChangedButton == MouseButton.Left)
+			{
+				clickPos = e.GetPosition(plotter.CentralGrid);
+
+				isMouseDown = true;
+				startTime = DateTime.Now;
+
+				animation = new PhysicalRectAnimation(
+					plotter.Viewport,
+					e.GetPosition(plotter.ViewportPanel));
+
+				timer.Start();
+			}
+		}
+
+		private void OnMouseUp(object sender, MouseButtonEventArgs e)
+		{
+			if (e.ChangedButton == MouseButton.Left)
+			{
+				isMouseDown = false;
+				if (clickPos == e.GetPosition(plotter.CentralGrid))
+				{
+					timer.Stop();
+					animation = null;
+				}
+				else
+				{
+					if (animation.IsFinished)
+					{
+						timer.Stop();
+						animation = null;
+					}
+					else
+					{
+						animation.UseMouse = false;
+						animation.LiquidFrictionQuadraticCoeff = 1;
+					}
+				}
+			}
+		}
+
+		#region IPlotterElement Members
+
+		private Plotter2D plotter;
+		void IPlotterElement.OnPlotterAttached(Plotter plotter)
+		{
+			this.plotter = (Plotter2D)plotter;
+
+			Mouse.AddPreviewMouseDownHandler(plotter.CentralGrid, OnMouseDown);
+			Mouse.AddPreviewMouseUpHandler(plotter.CentralGrid, OnMouseUp);
+			plotter.CentralGrid.MouseLeave += CentralGrid_MouseLeave;
+		}
+
+		private void CentralGrid_MouseLeave(object sender, MouseEventArgs e)
+		{
+			isMouseDown = false;
+		}
+
+		void IPlotterElement.OnPlotterDetaching(Plotter plotter)
+		{
+			plotter.CentralGrid.MouseLeave -= CentralGrid_MouseLeave;
+			Mouse.RemovePreviewMouseDownHandler(plotter.CentralGrid, OnMouseDown);
+			Mouse.RemovePreviewMouseUpHandler(plotter.CentralGrid, OnMouseUp);
+
+			this.plotter = null;
+		}
+
+		Plotter IPlotterElement.Plotter
+		{
+			get { return plotter; }
+		}
+
+		#endregion
+	}
+}