Initial Commit

Charts/MarkerPointGraph.cs

@@ -0,0 +1,62 @@
+using System.Windows;
+using System.Windows.Media;
+using Microsoft.Research.DynamicDataDisplay.DataSources;
+using Microsoft.Research.DynamicDataDisplay.PointMarkers;
+
+namespace Microsoft.Research.DynamicDataDisplay
+{
+    public class MarkerPointsGraph : PointsGraphBase
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MarkerPointsGraph"/> class.
+        /// </summary>
+        public MarkerPointsGraph() { }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MarkerPointsGraph"/> class.
+        /// </summary>
+        /// <param name="dataSource">The data source.</param>
+        public MarkerPointsGraph(IPointDataSource dataSource)
+        {
+            DataSource = dataSource;
+        }
+
+        public PointMarker Marker
+        {
+            get { return (PointMarker)GetValue(MarkerProperty); }
+            set { SetValue(MarkerProperty, value); }
+        }
+
+        public static readonly DependencyProperty MarkerProperty =
+            DependencyProperty.Register(
+              "Marker",
+              typeof(PointMarker),
+              typeof(MarkerPointsGraph),
+              new FrameworkPropertyMetadata { DefaultValue = null, AffectsRender = true }
+                  );
+
+        protected override void OnRenderCore(DrawingContext dc, RenderState state)
+        {
+            if (DataSource == null) return;
+            if (Marker == null) return;
+
+            Rect bounds = Rect.Empty;
+            using (IPointEnumerator enumerator = DataSource.GetEnumerator(GetContext()))
+            {
+                Point point = new Point();
+                while (enumerator.MoveNext())
+                {
+                    enumerator.GetCurrent(ref point);
+                    enumerator.ApplyMappings(Marker);
+
+                    Point screenPoint = point.Transform(state.Visible, state.Output);
+
+                    bounds = Rect.Union(bounds, point);
+                    Marker.Render(dc, screenPoint);
+                }
+            }
+
+            ContentBounds = bounds;
+        }
+    }
+}