Initial Commit

Charts/MarkersPointsGraph.cs

@@ -0,0 +1,78 @@
+using System.Windows;
+using System.Windows.Media;
+using Microsoft.Research.DynamicDataDisplay.DataSources;
+using Microsoft.Research.DynamicDataDisplay.PointMarkers;
+using Microsoft.Research.DynamicDataDisplay.Common;
+
+namespace Microsoft.Research.DynamicDataDisplay
+{
+  public class MarkersPointsGraph : PointsGraphBase
+  {
+    /// <summary>
+    /// Initializes a new instance of the <see cref="MarkerPointsGraph"/> class.
+    /// </summary>
+    public MarkersPointsGraph()
+    {
+      ManualTranslate = true;
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="MarkerPointsGraph"/> class.
+    /// </summary>
+    /// <param name="dataSource">The data source.</param>
+    public MarkersPointsGraph(IPointDataSource dataSource)
+      : this()
+    {
+      DataSource = dataSource;
+    }
+
+    protected override void OnVisibleChanged(DataRect newRect, DataRect oldRect)
+    {
+      base.OnVisibleChanged(newRect, oldRect);
+      InvalidateVisual();
+    }
+
+    public PointMarker[] Markers
+    {
+      get { return (PointMarker[])GetValue(MarkerProperty); }
+      set { SetValue(MarkerProperty, value); }
+    }
+
+    public static readonly DependencyProperty MarkerProperty =
+      DependencyProperty.Register(
+        "Markers",
+        typeof(PointMarker[]),
+        typeof(MarkersPointsGraph),
+        new FrameworkPropertyMetadata { DefaultValue = null, AffectsRender = true }
+          );
+
+    protected override void OnRenderCore(DrawingContext dc, RenderState state)
+    {
+      if (DataSource == null) return;
+      if (Markers == null) return;
+
+      var transform = Plotter2D.Viewport.Transform;
+
+      DataRect bounds = DataRect.Empty;
+      int index = 0;
+      using (IPointEnumerator enumerator = DataSource.GetEnumerator(GetContext()))
+      {
+        Point point = new Point();
+        while (enumerator.MoveNext())
+        {
+          enumerator.GetCurrent(ref point);
+          PointMarker pointMarker = null;
+          if (index >= Markers.Length) pointMarker=new CenteredTextMarker{Text=""};
+          else pointMarker=Markers[index];
+          enumerator.ApplyMappings(pointMarker);
+          Point screenPoint = point.DataToScreen(transform);
+          bounds = DataRect.Union(bounds, point);
+          pointMarker.Render(dc, screenPoint);
+          index++;
+        }
+      }
+
+      Viewport2D.SetContentBounds(this, bounds);
+    }
+  }
+}