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