Initial Commit

PointMarkers/TrianglePointMarker.cs

@@ -0,0 +1,49 @@
+using System.Windows;
+using System.Windows.Media;
+using System;
+
+namespace Microsoft.Research.DynamicDataDisplay.PointMarkers
+{
+    /// <summary>Class that renders triangular marker at every point of graph</summary>
+	public class TrianglePointMarker : ShapePointMarker 
+  {
+		public override void Render(DrawingContext dc, Point screenPoint) 
+        {
+            Point? pt0 = null;
+            Point? pt1 = null;
+            Point? pt2 = null;
+
+            if (Orientation.Equals("up"))
+            {
+              pt0 = Point.Add(screenPoint, new Vector(-Size / 2, Size / 2));
+              pt1 = Point.Add(screenPoint, new Vector(0, -Size / 2));
+              pt2 = Point.Add(screenPoint, new Vector(Size / 2, Size / 2));
+            }
+            else
+            {
+              pt0 = Point.Add(screenPoint, new Vector(-Size / 2, -Size / 2));
+              pt1 = Point.Add(screenPoint, new Vector(0, Size / 2));
+              pt2 = Point.Add(screenPoint, new Vector(Size / 2, -Size / 2));
+            }
+			  StreamGeometry streamGeom = new StreamGeometry();
+			  using (var context = streamGeom.Open()) {
+				context.BeginFigure(pt0.Value, true, true);
+				context.LineTo(pt1.Value, true, true);
+				context.LineTo(pt2.Value, true, true);
+			}
+			dc.DrawGeometry(Fill, Pen, streamGeom);
+		}
+        public String Orientation
+        {
+            get { return (String)GetValue(OrientationProperty); }
+            set { SetValue(OrientationProperty, value); }
+        }
+        public static readonly DependencyProperty OrientationProperty =
+          DependencyProperty.Register(
+            "Orientation",
+            typeof(String),
+            typeof(TrianglePointMarker),
+            new FrameworkPropertyMetadata("up")
+              );
+	}
+}