/// <summary>
/// Transforms list of points from data coordinates to screen coordinates.
/// </summary>
/// <param name="dataPoints">Points in data coordinates</param>
/// <param name="transform">CoordinateTransform used to perform transformation</param>
/// <returns>Points in screen coordinates</returns>
public static List<Point> DataToScreen(this IEnumerable<Point> dataPoints, CoordinateTransform transform)
{
var collection = dataPoints as ICollection<Point>;
List<Point> res;
if (collection != null)
{
res = new List<Point>(collection.Count);
}
else
{
res = new List<Point>();
}
foreach (var point in dataPoints)
{
res.Add(transform.DataToScreen(point));
}
return res;
}
/// <summary>
/// Transforms list of points from data coordinates to screen coordinates.
/// </summary>
/// <param name="dataPoints">Points in data coordinates</param>
/// <param name="transform">CoordinateTransform used to perform transformation</param>
/// <returns>Points in screen coordinates</returns>
public static List <Point> DataToScreen(this IEnumerable <Point> dataPoints, CoordinateTransform transform)
{
var collection = dataPoints as ICollection <Point>;
List <Point> res;
if (collection != null)
{
res = new List <Point>(collection.Count);
}
else
{
res = new List <Point>();
}
foreach (var point in dataPoints)
{
res.Add(transform.DataToScreen(point));
}
return(res);
}
private void Update()
{
if (ChartData == null) return;
IEnumerable<Point> points = GetPoints();
// Transform chart data to screen points
Transform = new CoordinateTransform(Viewport.Visible, Viewport.Output);
List<Point> transformedPoints = Transform.DataToScreen(points);
// Filter unnecessary points
//FilteredPoints = new FilteredPointList(FilterPoints(transformedPoints), Viewport.Output.Left, Viewport.Output.Right);
FilteredPoints = transformedPoints;
}
internal CoordinateTransform WithRects(Rect visibleRect, Rect screenRect)
{
var copy = new CoordinateTransform(visibleRect, screenRect);
copy.dataTransform = dataTransform;
return copy;
}
/// <summary>
/// Transforms list of points from data coordinates to screen coordinates.
/// </summary>
/// <param name="transform">Coordinate transform used to perform transformation</param>
/// <param name="dataPoints">Points in data coordinates</param>
/// <returns>List of points in screen coordinates</returns>
public static List <Point> DataToScreen(this CoordinateTransform transform, IEnumerable <Point> dataPoints)
{
return(dataPoints.DataToScreen(transform));
}
