private void UpdateBounds(IPointDataSource dataSource)
{
if (Plotter2D != null)
{
var transform = GetTransform();
DataRect bounds = BoundsHelper.GetViewportBounds(dataSource.GetPoints(), transform.DataTransform);
Viewport2D.SetContentBounds(this, bounds);
}
}
protected override void UpdateCore()
{
if (DataSource == null)
{
return;
}
if (Plotter == null)
{
return;
}
if (!IsEnabled)
{
return;
}
Rect output = Viewport.Output;
var transform = GetTransform();
if (filteredPoints == null || !(transform.DataTransform is IdentityTransform))
{
IEnumerable <Point> points = GetPoints();
var bounds = BoundsHelper.GetViewportBounds(points, transform.DataTransform);
Viewport2D.SetContentBounds(this, bounds);
// getting new value of transform as it could change after calculating and setting content bounds.
transform = GetTransform();
List <Point> transformedPoints = transform.DataToScreenAsList(points);
// Analysis and filtering of unnecessary points
filteredPoints = new FakePointList(FilterPoints(transformedPoints),
output.Left, output.Right);
if (ProvideVisiblePoints)
{
List <Point> viewportPointsList = null;
viewportPointsList = new List <Point>(transformedPoints.Count);
if (transform.DataTransform is IdentityTransform)
{
viewportPointsList.AddRange(points);
}
else
{
var viewportPoints = points.DataToViewport(transform.DataTransform);
viewportPointsList.AddRange(viewportPoints);
}
SetVisiblePoints(this, new ReadOnlyCollection <Point>(viewportPointsList));
}
Offset = new Vector();
}
else
{
double left = output.Left;
double right = output.Right;
double shift = Offset.X;
left -= shift;
right -= shift;
filteredPoints.SetXBorders(left, right);
}
}
public static DataRect GetBounds(this IEnumerable <Point> points)
{
return(BoundsHelper.GetViewportBounds(points));
}